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Energy-based devices: Expert shares treatment tips for rosacea, scars
, according to a 2020 international consensus publication that Jeremy B. Green, MD, reviewed during a virtual course on laser and aesthetic skin therapy.
During his presentation, he also reviewed laser treatment of scars. “Erythema is an indicator of scar activity,” said Dr. Green, a dermatologist in Coral Gables, Fla. “So, with flat, red scars, vascular devices are the first choice. If you’re going to treat with multiple lasers in a single session, use the vascular laser first, followed by a resurfacing laser if needed. If you treat with a resurfacing laser first, you’ll cause erythema and edema and you’ll obscure that blood vessel target.”
The manuscript, which was created by a panel of 26 dermatologists and plastic and reconstructive surgeons from 13 different countries, also calls for using scar treatment settings that are lower than those used for port wine stains, with mild purpura as the clinical endpoint to strive for.
Vascular lasers are also the expert panel’s first choice when a scar is painful or pruritic, while the second choice is an ablative fractional laser with intralesional triamcinolone and/or 5-fluorouracil (5-FU). “If the scar is hypertrophic, I will combine a vascular laser, then a nonablative or an ablative fractional laser, then intralesional triamcinolone mixed with 5-FU,” said Dr. Green, who was not involved in drafting the recommendations.
As for the first treatment of choice, 80% of the experts chose a pulsed dye laser, while others chose the KTP laser, intense pulsed light (IPL) and the neodymium yttrium aluminum garnet (Nd:YAG) laser. With regard to settings, when using a PDL and a 10-mm spot size, 41% of experts recommend a fluence of 5-6 J/cm2, 27% recommend a fluence of 4-5 J/cm2, and 27% recommend a fluence of 6-7 J/cm2. Pertaining to pulse duration, 50% favor 1.5 milliseconds, 18% use 3 milliseconds, and 18% use .45 milliseconds.
As for timing post surgery, 70% report treating less than 1 week after surgery and 90% report treating within 1 month post surgery. “I prefer to treat about 1 week after sutures are removed so the skin is re-epithelialized,” Dr. Green said. “The bottom line is, with postsurgical, posttraumatic scars, once the skin is healed, the sooner you get at it, the better.”
Rosacea
He also discussed the microvascular effects of PDL in combination with oxymetazoline 1% cream, an alpha1A adrenoceptor agonist, which is approved by the Food and Drug Administration for treatment of persistent facial erythema associated with rosacea. “This has been a hot topic lately,” Dr. Green said. “When the studies were done for FDA approval, there was an observation that vasodilation occurs 5 minutes after application of oxymetazoline, so the venule diameter increases. Sixty minutes after application, vasoconstriction happens, which is the desired clinical effect for patients with facial erythema.”
In a mouse study, researchers led by Bernard Choi, PhD, and Kristin M. Kelly, MD, of the Beckman Laser Institute and Medical Clinic, University of California, Irvine, found that the combination protocol of oxymetazoline application, followed 5 minutes later by PDL, induced persistent vascular shutdown 7 days after irradiation. Vascular shutdown occurred in 67% of vessels treated with oxymetazoline plus PDL at day 7 vs. 17% in those treated with saline plus PDL.
“This is fascinating,” Dr. Green said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “There is no publication I’m aware of in humans that has explored this timing, but I have used oxymetazoline in my clinic in patients with stubborn erythema and treated them with the vascular laser 5 minutes later.”
In a separate open-label study of 46 patients with moderate to severe facial erythema associated with rosacea, researchers found that oxymetazoline 1% as adjunctive therapy with energy-based therapy was safe and well tolerated, and reduced facial erythema in patients with moderate to severe persistent facial erythema associated with rosacea. Energy sources used were the PDL, KTP, or IPL.
In a study presented during the 2020 American Society for Laser Medicine & Surgery meeting, researchers led by Pooja Sodha, MD, of George Washington University, Washington, conducted a pilot trial of PDL plus oxymetazoline 1% cream for erythematotelangiectatic rosacea. Between baseline and 6 months’ follow-up the Clinician’s Erythema Assessment score fell from 4 to 2.
“Of note, I would also throw the kitchen sink at these patients medically, meaning I love topical ivermectin 1% cream,” Dr. Green said. “In some cases I’ll even use oral ivermectin and an oral tetracycline class antibiotic.”
He reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
, according to a 2020 international consensus publication that Jeremy B. Green, MD, reviewed during a virtual course on laser and aesthetic skin therapy.
During his presentation, he also reviewed laser treatment of scars. “Erythema is an indicator of scar activity,” said Dr. Green, a dermatologist in Coral Gables, Fla. “So, with flat, red scars, vascular devices are the first choice. If you’re going to treat with multiple lasers in a single session, use the vascular laser first, followed by a resurfacing laser if needed. If you treat with a resurfacing laser first, you’ll cause erythema and edema and you’ll obscure that blood vessel target.”
The manuscript, which was created by a panel of 26 dermatologists and plastic and reconstructive surgeons from 13 different countries, also calls for using scar treatment settings that are lower than those used for port wine stains, with mild purpura as the clinical endpoint to strive for.
Vascular lasers are also the expert panel’s first choice when a scar is painful or pruritic, while the second choice is an ablative fractional laser with intralesional triamcinolone and/or 5-fluorouracil (5-FU). “If the scar is hypertrophic, I will combine a vascular laser, then a nonablative or an ablative fractional laser, then intralesional triamcinolone mixed with 5-FU,” said Dr. Green, who was not involved in drafting the recommendations.
As for the first treatment of choice, 80% of the experts chose a pulsed dye laser, while others chose the KTP laser, intense pulsed light (IPL) and the neodymium yttrium aluminum garnet (Nd:YAG) laser. With regard to settings, when using a PDL and a 10-mm spot size, 41% of experts recommend a fluence of 5-6 J/cm2, 27% recommend a fluence of 4-5 J/cm2, and 27% recommend a fluence of 6-7 J/cm2. Pertaining to pulse duration, 50% favor 1.5 milliseconds, 18% use 3 milliseconds, and 18% use .45 milliseconds.
As for timing post surgery, 70% report treating less than 1 week after surgery and 90% report treating within 1 month post surgery. “I prefer to treat about 1 week after sutures are removed so the skin is re-epithelialized,” Dr. Green said. “The bottom line is, with postsurgical, posttraumatic scars, once the skin is healed, the sooner you get at it, the better.”
Rosacea
He also discussed the microvascular effects of PDL in combination with oxymetazoline 1% cream, an alpha1A adrenoceptor agonist, which is approved by the Food and Drug Administration for treatment of persistent facial erythema associated with rosacea. “This has been a hot topic lately,” Dr. Green said. “When the studies were done for FDA approval, there was an observation that vasodilation occurs 5 minutes after application of oxymetazoline, so the venule diameter increases. Sixty minutes after application, vasoconstriction happens, which is the desired clinical effect for patients with facial erythema.”
In a mouse study, researchers led by Bernard Choi, PhD, and Kristin M. Kelly, MD, of the Beckman Laser Institute and Medical Clinic, University of California, Irvine, found that the combination protocol of oxymetazoline application, followed 5 minutes later by PDL, induced persistent vascular shutdown 7 days after irradiation. Vascular shutdown occurred in 67% of vessels treated with oxymetazoline plus PDL at day 7 vs. 17% in those treated with saline plus PDL.
“This is fascinating,” Dr. Green said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “There is no publication I’m aware of in humans that has explored this timing, but I have used oxymetazoline in my clinic in patients with stubborn erythema and treated them with the vascular laser 5 minutes later.”
In a separate open-label study of 46 patients with moderate to severe facial erythema associated with rosacea, researchers found that oxymetazoline 1% as adjunctive therapy with energy-based therapy was safe and well tolerated, and reduced facial erythema in patients with moderate to severe persistent facial erythema associated with rosacea. Energy sources used were the PDL, KTP, or IPL.
In a study presented during the 2020 American Society for Laser Medicine & Surgery meeting, researchers led by Pooja Sodha, MD, of George Washington University, Washington, conducted a pilot trial of PDL plus oxymetazoline 1% cream for erythematotelangiectatic rosacea. Between baseline and 6 months’ follow-up the Clinician’s Erythema Assessment score fell from 4 to 2.
“Of note, I would also throw the kitchen sink at these patients medically, meaning I love topical ivermectin 1% cream,” Dr. Green said. “In some cases I’ll even use oral ivermectin and an oral tetracycline class antibiotic.”
He reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
, according to a 2020 international consensus publication that Jeremy B. Green, MD, reviewed during a virtual course on laser and aesthetic skin therapy.
During his presentation, he also reviewed laser treatment of scars. “Erythema is an indicator of scar activity,” said Dr. Green, a dermatologist in Coral Gables, Fla. “So, with flat, red scars, vascular devices are the first choice. If you’re going to treat with multiple lasers in a single session, use the vascular laser first, followed by a resurfacing laser if needed. If you treat with a resurfacing laser first, you’ll cause erythema and edema and you’ll obscure that blood vessel target.”
The manuscript, which was created by a panel of 26 dermatologists and plastic and reconstructive surgeons from 13 different countries, also calls for using scar treatment settings that are lower than those used for port wine stains, with mild purpura as the clinical endpoint to strive for.
Vascular lasers are also the expert panel’s first choice when a scar is painful or pruritic, while the second choice is an ablative fractional laser with intralesional triamcinolone and/or 5-fluorouracil (5-FU). “If the scar is hypertrophic, I will combine a vascular laser, then a nonablative or an ablative fractional laser, then intralesional triamcinolone mixed with 5-FU,” said Dr. Green, who was not involved in drafting the recommendations.
As for the first treatment of choice, 80% of the experts chose a pulsed dye laser, while others chose the KTP laser, intense pulsed light (IPL) and the neodymium yttrium aluminum garnet (Nd:YAG) laser. With regard to settings, when using a PDL and a 10-mm spot size, 41% of experts recommend a fluence of 5-6 J/cm2, 27% recommend a fluence of 4-5 J/cm2, and 27% recommend a fluence of 6-7 J/cm2. Pertaining to pulse duration, 50% favor 1.5 milliseconds, 18% use 3 milliseconds, and 18% use .45 milliseconds.
As for timing post surgery, 70% report treating less than 1 week after surgery and 90% report treating within 1 month post surgery. “I prefer to treat about 1 week after sutures are removed so the skin is re-epithelialized,” Dr. Green said. “The bottom line is, with postsurgical, posttraumatic scars, once the skin is healed, the sooner you get at it, the better.”
Rosacea
He also discussed the microvascular effects of PDL in combination with oxymetazoline 1% cream, an alpha1A adrenoceptor agonist, which is approved by the Food and Drug Administration for treatment of persistent facial erythema associated with rosacea. “This has been a hot topic lately,” Dr. Green said. “When the studies were done for FDA approval, there was an observation that vasodilation occurs 5 minutes after application of oxymetazoline, so the venule diameter increases. Sixty minutes after application, vasoconstriction happens, which is the desired clinical effect for patients with facial erythema.”
In a mouse study, researchers led by Bernard Choi, PhD, and Kristin M. Kelly, MD, of the Beckman Laser Institute and Medical Clinic, University of California, Irvine, found that the combination protocol of oxymetazoline application, followed 5 minutes later by PDL, induced persistent vascular shutdown 7 days after irradiation. Vascular shutdown occurred in 67% of vessels treated with oxymetazoline plus PDL at day 7 vs. 17% in those treated with saline plus PDL.
“This is fascinating,” Dr. Green said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “There is no publication I’m aware of in humans that has explored this timing, but I have used oxymetazoline in my clinic in patients with stubborn erythema and treated them with the vascular laser 5 minutes later.”
In a separate open-label study of 46 patients with moderate to severe facial erythema associated with rosacea, researchers found that oxymetazoline 1% as adjunctive therapy with energy-based therapy was safe and well tolerated, and reduced facial erythema in patients with moderate to severe persistent facial erythema associated with rosacea. Energy sources used were the PDL, KTP, or IPL.
In a study presented during the 2020 American Society for Laser Medicine & Surgery meeting, researchers led by Pooja Sodha, MD, of George Washington University, Washington, conducted a pilot trial of PDL plus oxymetazoline 1% cream for erythematotelangiectatic rosacea. Between baseline and 6 months’ follow-up the Clinician’s Erythema Assessment score fell from 4 to 2.
“Of note, I would also throw the kitchen sink at these patients medically, meaning I love topical ivermectin 1% cream,” Dr. Green said. “In some cases I’ll even use oral ivermectin and an oral tetracycline class antibiotic.”
He reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
EXPERT ANALYSIS FROM A LASER & AESTHETIC SKIN THERAPY COURSE
Skin rejuvenation: Full-field ablative resurfacing remains a gold standard
according to Brian S. Biesman, MD.
“When performing laser skin resurfacing, our goal is to match the degree of injury to the needs of the patient we’re treating,” Dr. Biesman, an oculofacial plastic surgeon who practices in Nashville, Tenn., said during a virtual course on laser and aesthetic skin therapy.
“If we’re treating a 35-year-old with minimal photoaging, we don’t need to use full-field resurfacing. By the same token, a 60-year-old who’s never had anything but sun exposure is not going to do well with nonablative fractional resurfacing or other modalities that produce only modest changes,” he noted. “Full ablative resurfacing is a useful tool that can be used to treat a variety of patients. We can tailor each treatment to the individual patient. We can simply dial the energy up or down and adjust the density.”
Full-field laser ablation removes the epidermis as well as a part of the dermis, and the degree of dermal injury varies depending on the relative aggressiveness of the treatment. “We can treat very superficially in the dermis or we can do deep dermal treatments,” he said at the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine.
“The residual thermal injury will vary to some degree, depending on our treatment parameters. It does cause immediate collagen contracture. It also stimulates a process of neocollagenesis.”
Two main lasers used for full-field treatments are the erbium:YAG laser and the CO2 laser at wavelengths of 2,940 nm and 10,600 nm, respectively. “The erbium:YAG is far more highly absorbed by water, by a factor of about 13,” he said. “But both of these wavelengths can be used successfully as long as you understand the physics behind them.”
The short-pulsed erbium:YAG laser ablates effectively, producing about a 10 mcm zone of thermal injury. “That’s not going to induce much by the way of remodeling, but it will be effective in removing tissue from the superficial layers of the skin,” said Dr. Biesman, who is a past president of the American Society for Laser Medicine and Surgery. “There’s also an absorption peak for collagen, so if you’re treating a scar, this laser can be highly effective.”
The CO2 laser creates more residual thermal injury during full-field resurfacing, compared with the short-pulsed erbium:YAG laser. The long-pulsed erbium:YAG laser can be used in both short- and long-pulsed modes and is more ablative than the CO2 laser when used in short-pulsed mode. When used in long-pulse mode, it makes it possible to produce results “very similar to CO2 in terms of the thermal injury profile,” he said. “It’s a versatile device. So, the CO2 in its native mode produces more thermal injury, while the erbium:YAG laser is more ablative. Both can be used effectively for facial skin rejuvenation.”
Full-field laser resurfacing requires local infiltration with lidocaine 1% or 2% with epinephrine or general anesthesia. “This is not a treatment that you can do comfortably under topical anesthesia, even if you’re using cold air unless you are doing treatments essentially confined to the epidermis and superficial dermis,” Dr. Biesman said. “When working around the eyes or on the face you need to use ocular protection with metal ocular shields. There’s no two ways about it. There is no scenario in which you’re doing an ablative resurfacing around the eye where you don’t use metal corneal shields.”
Energy and density levels can be fine-tuned in order to optimize treatment. For deep rhytides in the perioral region or on the forehead or lateral cheeks, clinicians may choose to treat at a higher density, while rhytides located in other areas may respond well to treatments at a lower density. Relative danger zones include the eyelids in general, especially the medial lower eyelid, as well as the upper lip. “These are the areas that are most prone to developing scarring,” he said.
For the upper eyelids, Dr. Biesman treats from the lashes to the upper brow. “It’s important to protect the lashes and treat from the lower-lid margin all the way down to the orbital rim. I debride relatively aggressively. I want to debride all the eschar created by the first pass and come back with a second pass. I sometimes will decrease the density on the second pass, depending on the type of tissue response that I see. If I see a dramatic response on the second pass I will definitely decrease the density.” He uses Aquaphor to protect the eyebrows. “It’s difficult to do that on the lashes. For the lashes, I usually use a wet tongue blade and keep the lid on stretch as I do my treatments.”
Dr. Biesman recommends feathering to blend full-field treatments with the neck. This means bringing treatments below the mandible. “There are times when we want to conservatively treat the neck,” he said. “The neck does not recover nearly as well after ablative resurfacing as the face does due to the fact that there’s probably about 90% fewer sebaceous glands and hair follicles in the neck relative to the face.”
In Dr. Biesman’s opinion, the important perioperative preparation is counseling the patient, including setting realistic expectations and devising a plan for wound care. “They can expect 7-10 days to heal, depending on the area we’re treating and the relative aggressiveness of the planned treatment,” he said. For patients with a history of herpes simplex virus type 1, he recommends antiviral treatment prior to the procedure. “If you do encounter a herpetic infection postoperatively, you may not see typical clinical signs of blistering as the epidermis has been removed.”
Dr. Biesman uses both antiviral and antibiotic prophylaxis prior to full-field treatments. “The literature by and large says that antibiotic/antiviral prophylaxis is not required prior to full-face ablation,” he said. “The reason I choose to is that I have had some issues with community-acquired MRSA infections. Because it’s so ubiquitous these days, I typically do prescribe an agent that gives good MRSA coverage.”
As for wound care, the literature differs on open versus closed techniques. Dr. Biesman favors using Aquaphor for the first week or so and seeing patients back on posttreatment day 2, “who by that time are usually beyond the inflammatory phase of wound healing,” he said. “A lot of the initial oozing has stopped by then. We clean that off any dried exudate in the office very carefully. We debride gently with warm-water soaks and I like to use PRP [platelet-rich plasma]. There is literature to support the role of PRP in wound healing.”
Even in the most experienced hands, complications can occur from full-field laser resurfacing, including bacterial, viral, or fungal infections. Other potential complications include persistent erythema, hypopigmentation, hyperpigmentation, scarring, and ectropion. “Knowledge of treatment parameters, endpoints, and wound healing is required for safe and successful outcomes,” Dr. Biesman said.
He reported having no relevant disclosures related to his presentation.
according to Brian S. Biesman, MD.
“When performing laser skin resurfacing, our goal is to match the degree of injury to the needs of the patient we’re treating,” Dr. Biesman, an oculofacial plastic surgeon who practices in Nashville, Tenn., said during a virtual course on laser and aesthetic skin therapy.
“If we’re treating a 35-year-old with minimal photoaging, we don’t need to use full-field resurfacing. By the same token, a 60-year-old who’s never had anything but sun exposure is not going to do well with nonablative fractional resurfacing or other modalities that produce only modest changes,” he noted. “Full ablative resurfacing is a useful tool that can be used to treat a variety of patients. We can tailor each treatment to the individual patient. We can simply dial the energy up or down and adjust the density.”
Full-field laser ablation removes the epidermis as well as a part of the dermis, and the degree of dermal injury varies depending on the relative aggressiveness of the treatment. “We can treat very superficially in the dermis or we can do deep dermal treatments,” he said at the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine.
“The residual thermal injury will vary to some degree, depending on our treatment parameters. It does cause immediate collagen contracture. It also stimulates a process of neocollagenesis.”
Two main lasers used for full-field treatments are the erbium:YAG laser and the CO2 laser at wavelengths of 2,940 nm and 10,600 nm, respectively. “The erbium:YAG is far more highly absorbed by water, by a factor of about 13,” he said. “But both of these wavelengths can be used successfully as long as you understand the physics behind them.”
The short-pulsed erbium:YAG laser ablates effectively, producing about a 10 mcm zone of thermal injury. “That’s not going to induce much by the way of remodeling, but it will be effective in removing tissue from the superficial layers of the skin,” said Dr. Biesman, who is a past president of the American Society for Laser Medicine and Surgery. “There’s also an absorption peak for collagen, so if you’re treating a scar, this laser can be highly effective.”
The CO2 laser creates more residual thermal injury during full-field resurfacing, compared with the short-pulsed erbium:YAG laser. The long-pulsed erbium:YAG laser can be used in both short- and long-pulsed modes and is more ablative than the CO2 laser when used in short-pulsed mode. When used in long-pulse mode, it makes it possible to produce results “very similar to CO2 in terms of the thermal injury profile,” he said. “It’s a versatile device. So, the CO2 in its native mode produces more thermal injury, while the erbium:YAG laser is more ablative. Both can be used effectively for facial skin rejuvenation.”
Full-field laser resurfacing requires local infiltration with lidocaine 1% or 2% with epinephrine or general anesthesia. “This is not a treatment that you can do comfortably under topical anesthesia, even if you’re using cold air unless you are doing treatments essentially confined to the epidermis and superficial dermis,” Dr. Biesman said. “When working around the eyes or on the face you need to use ocular protection with metal ocular shields. There’s no two ways about it. There is no scenario in which you’re doing an ablative resurfacing around the eye where you don’t use metal corneal shields.”
Energy and density levels can be fine-tuned in order to optimize treatment. For deep rhytides in the perioral region or on the forehead or lateral cheeks, clinicians may choose to treat at a higher density, while rhytides located in other areas may respond well to treatments at a lower density. Relative danger zones include the eyelids in general, especially the medial lower eyelid, as well as the upper lip. “These are the areas that are most prone to developing scarring,” he said.
For the upper eyelids, Dr. Biesman treats from the lashes to the upper brow. “It’s important to protect the lashes and treat from the lower-lid margin all the way down to the orbital rim. I debride relatively aggressively. I want to debride all the eschar created by the first pass and come back with a second pass. I sometimes will decrease the density on the second pass, depending on the type of tissue response that I see. If I see a dramatic response on the second pass I will definitely decrease the density.” He uses Aquaphor to protect the eyebrows. “It’s difficult to do that on the lashes. For the lashes, I usually use a wet tongue blade and keep the lid on stretch as I do my treatments.”
Dr. Biesman recommends feathering to blend full-field treatments with the neck. This means bringing treatments below the mandible. “There are times when we want to conservatively treat the neck,” he said. “The neck does not recover nearly as well after ablative resurfacing as the face does due to the fact that there’s probably about 90% fewer sebaceous glands and hair follicles in the neck relative to the face.”
In Dr. Biesman’s opinion, the important perioperative preparation is counseling the patient, including setting realistic expectations and devising a plan for wound care. “They can expect 7-10 days to heal, depending on the area we’re treating and the relative aggressiveness of the planned treatment,” he said. For patients with a history of herpes simplex virus type 1, he recommends antiviral treatment prior to the procedure. “If you do encounter a herpetic infection postoperatively, you may not see typical clinical signs of blistering as the epidermis has been removed.”
Dr. Biesman uses both antiviral and antibiotic prophylaxis prior to full-field treatments. “The literature by and large says that antibiotic/antiviral prophylaxis is not required prior to full-face ablation,” he said. “The reason I choose to is that I have had some issues with community-acquired MRSA infections. Because it’s so ubiquitous these days, I typically do prescribe an agent that gives good MRSA coverage.”
As for wound care, the literature differs on open versus closed techniques. Dr. Biesman favors using Aquaphor for the first week or so and seeing patients back on posttreatment day 2, “who by that time are usually beyond the inflammatory phase of wound healing,” he said. “A lot of the initial oozing has stopped by then. We clean that off any dried exudate in the office very carefully. We debride gently with warm-water soaks and I like to use PRP [platelet-rich plasma]. There is literature to support the role of PRP in wound healing.”
Even in the most experienced hands, complications can occur from full-field laser resurfacing, including bacterial, viral, or fungal infections. Other potential complications include persistent erythema, hypopigmentation, hyperpigmentation, scarring, and ectropion. “Knowledge of treatment parameters, endpoints, and wound healing is required for safe and successful outcomes,” Dr. Biesman said.
He reported having no relevant disclosures related to his presentation.
according to Brian S. Biesman, MD.
“When performing laser skin resurfacing, our goal is to match the degree of injury to the needs of the patient we’re treating,” Dr. Biesman, an oculofacial plastic surgeon who practices in Nashville, Tenn., said during a virtual course on laser and aesthetic skin therapy.
“If we’re treating a 35-year-old with minimal photoaging, we don’t need to use full-field resurfacing. By the same token, a 60-year-old who’s never had anything but sun exposure is not going to do well with nonablative fractional resurfacing or other modalities that produce only modest changes,” he noted. “Full ablative resurfacing is a useful tool that can be used to treat a variety of patients. We can tailor each treatment to the individual patient. We can simply dial the energy up or down and adjust the density.”
Full-field laser ablation removes the epidermis as well as a part of the dermis, and the degree of dermal injury varies depending on the relative aggressiveness of the treatment. “We can treat very superficially in the dermis or we can do deep dermal treatments,” he said at the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine.
“The residual thermal injury will vary to some degree, depending on our treatment parameters. It does cause immediate collagen contracture. It also stimulates a process of neocollagenesis.”
Two main lasers used for full-field treatments are the erbium:YAG laser and the CO2 laser at wavelengths of 2,940 nm and 10,600 nm, respectively. “The erbium:YAG is far more highly absorbed by water, by a factor of about 13,” he said. “But both of these wavelengths can be used successfully as long as you understand the physics behind them.”
The short-pulsed erbium:YAG laser ablates effectively, producing about a 10 mcm zone of thermal injury. “That’s not going to induce much by the way of remodeling, but it will be effective in removing tissue from the superficial layers of the skin,” said Dr. Biesman, who is a past president of the American Society for Laser Medicine and Surgery. “There’s also an absorption peak for collagen, so if you’re treating a scar, this laser can be highly effective.”
The CO2 laser creates more residual thermal injury during full-field resurfacing, compared with the short-pulsed erbium:YAG laser. The long-pulsed erbium:YAG laser can be used in both short- and long-pulsed modes and is more ablative than the CO2 laser when used in short-pulsed mode. When used in long-pulse mode, it makes it possible to produce results “very similar to CO2 in terms of the thermal injury profile,” he said. “It’s a versatile device. So, the CO2 in its native mode produces more thermal injury, while the erbium:YAG laser is more ablative. Both can be used effectively for facial skin rejuvenation.”
Full-field laser resurfacing requires local infiltration with lidocaine 1% or 2% with epinephrine or general anesthesia. “This is not a treatment that you can do comfortably under topical anesthesia, even if you’re using cold air unless you are doing treatments essentially confined to the epidermis and superficial dermis,” Dr. Biesman said. “When working around the eyes or on the face you need to use ocular protection with metal ocular shields. There’s no two ways about it. There is no scenario in which you’re doing an ablative resurfacing around the eye where you don’t use metal corneal shields.”
Energy and density levels can be fine-tuned in order to optimize treatment. For deep rhytides in the perioral region or on the forehead or lateral cheeks, clinicians may choose to treat at a higher density, while rhytides located in other areas may respond well to treatments at a lower density. Relative danger zones include the eyelids in general, especially the medial lower eyelid, as well as the upper lip. “These are the areas that are most prone to developing scarring,” he said.
For the upper eyelids, Dr. Biesman treats from the lashes to the upper brow. “It’s important to protect the lashes and treat from the lower-lid margin all the way down to the orbital rim. I debride relatively aggressively. I want to debride all the eschar created by the first pass and come back with a second pass. I sometimes will decrease the density on the second pass, depending on the type of tissue response that I see. If I see a dramatic response on the second pass I will definitely decrease the density.” He uses Aquaphor to protect the eyebrows. “It’s difficult to do that on the lashes. For the lashes, I usually use a wet tongue blade and keep the lid on stretch as I do my treatments.”
Dr. Biesman recommends feathering to blend full-field treatments with the neck. This means bringing treatments below the mandible. “There are times when we want to conservatively treat the neck,” he said. “The neck does not recover nearly as well after ablative resurfacing as the face does due to the fact that there’s probably about 90% fewer sebaceous glands and hair follicles in the neck relative to the face.”
In Dr. Biesman’s opinion, the important perioperative preparation is counseling the patient, including setting realistic expectations and devising a plan for wound care. “They can expect 7-10 days to heal, depending on the area we’re treating and the relative aggressiveness of the planned treatment,” he said. For patients with a history of herpes simplex virus type 1, he recommends antiviral treatment prior to the procedure. “If you do encounter a herpetic infection postoperatively, you may not see typical clinical signs of blistering as the epidermis has been removed.”
Dr. Biesman uses both antiviral and antibiotic prophylaxis prior to full-field treatments. “The literature by and large says that antibiotic/antiviral prophylaxis is not required prior to full-face ablation,” he said. “The reason I choose to is that I have had some issues with community-acquired MRSA infections. Because it’s so ubiquitous these days, I typically do prescribe an agent that gives good MRSA coverage.”
As for wound care, the literature differs on open versus closed techniques. Dr. Biesman favors using Aquaphor for the first week or so and seeing patients back on posttreatment day 2, “who by that time are usually beyond the inflammatory phase of wound healing,” he said. “A lot of the initial oozing has stopped by then. We clean that off any dried exudate in the office very carefully. We debride gently with warm-water soaks and I like to use PRP [platelet-rich plasma]. There is literature to support the role of PRP in wound healing.”
Even in the most experienced hands, complications can occur from full-field laser resurfacing, including bacterial, viral, or fungal infections. Other potential complications include persistent erythema, hypopigmentation, hyperpigmentation, scarring, and ectropion. “Knowledge of treatment parameters, endpoints, and wound healing is required for safe and successful outcomes,” Dr. Biesman said.
He reported having no relevant disclosures related to his presentation.
FROM A LASER & AESTHETIC SKIN THERAPY COURSE
Light-based technologies emerging as promising acne treatments
such as Fernanda H. Sakamoto, MD, PhD.
“I love treating acne, because it can have a huge impact on our patients’ lives,” Dr. Sakamoto, a dermatologist at the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “Acne is the most common disease in dermatology, affecting about 80% of our patients. Eleven percent of these patients have difficult-to-treat acne, and it is also the No. 1 cause of depression and suicide among teenagers and young adults. And, even though there’s no strong evidence that optical treatments work better than conventional acne treatments, people still spend a lot on those treatments: more than 220 million in 2019.”
Early results from a pilot study suggest that use of a novel laser system known as Accure in patients with mild to moderate acne resulted in an 80% reduction in acne lesions at 12 weeks. The laser prototype, which uses a 1,726 nm wavelength and is being developed by researchers at the Wellman Center for Photomedicine, features a built-in thermal camera in the handpiece that allows the user to monitor the skin’s temperature during treatment.
In initial pilot studies of the device, Dr. Sakamoto and colleagues observed consistent damage of the sebaceous glands, with no damage to the epidermis, surrounding dermis, or other follicular structures. “But because the contrast of absorption of lipids and water is not very high, we needed to create a laser with features that we have never seen before,” she said. “One of them is a robust cooling system. The second prototype features a built-in thermal camera within the handpiece that allows us to see the temperature while we’re treating the patient. It also has built-in software that would shut down the laser if the temperature is too high. “This is the first laser with some safety features that will give the user direct feedback while treating the patient,” she said, noting that its “unique cooling system and real-time monitoring ... makes it different from any of the lasers we see on the market right now.”
Dr. Sakamoto and colleagues (Emil Tanghetti, MD, in San Diego, Roy Geronemus, MD, in New York, and Joel L. Cohen, MD, in Colorado) are conducting a clinical trial of the device, to evaluate whether Accure can selectively target sebaceous glands. As of Oct. 23, 2020, the study enrolled more than 50 patients, who are followed at 4, 8, 12, and 24 weeks post treatment, she said.
To date, 16 patients have completed the study, and the researchers have observed an average lesion reduction of 80% at 12 weeks post treatment, after four treatment sessions. This amounted to more than 12,000 trigger pulls of the device, with no unexpected adverse events. Average visual analogue scale pain scores immediately after treatment have been 1.09 out of 10.
Histologic assessment of skin samples collected from the study participants have revealed selective damage of the sebaceous glands with a normal epidermis and surrounding dermis. “Because this laser is near infrared, it is not absorbed by melanin, making it possible for a safe treatment in darker skin tones,” Dr. Sakamoto said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine.
“We have shown that it is possible to create a selective laser for acne treatment at 1,726 nm. We have proven it mathematically as well as with histological samples,” she said. “Now we are moving on to a larger clinical trial for the FDA clearance.”
Another strategy being developed for acne treatment is to make nonselective lasers selective by adding gold microparticles into the hair follicle and sebaceous glands, to allow the lasers to be absorbed. In a study that used a free electron laser, Dr. Sakamoto and colleagues demonstrated that these microparticles can stay within the sebaceous glands for selective damage of the sebaceous glands. In a subsequent pilot clinical trial they showed that the addition of the gold microparticles followed by a diode laser treatment made it possible to reduce both inflammatory and noninflammatory lesions.
More recently, an open-label European study of acne treatment with light absorbing gold microparticles and optical pulses demonstrated that the treatment led to an 80%-90% reduction of inflammatory lesions at 12 weeks, with a reduction of Investigator’s Global Assessment scale from 2 to 4.
The Food and Drug Administration cleared the treatment, Sebacia Microparticles, for the treatment of mild to moderate acne in September of 2018, but according to Dr. Sakamoto, “the company has struggled, as they were only commercializing the device in California and Washington, DC.”
Photodynamic therapy (PDT) is also being studied as an acne treatment. “PDT uses a photosensitizer that needs to be activated by a light source,” she noted. “The combination of red light and aminolevulinic acid (ALA) or methyl ester ALA has been shown to damage the sebaceous glands”.
In a recent randomized controlled trial that compared PDT to adapalene gel plus oral doxycycline, PDT showed superiority. “Because PDT induces apoptosis of the sebaceous glands, it causes a lot of pain and side effects after treatment,” Dr. Sakamoto said. “However, it can clear 80%-90% of acne in 80%-90% of patients. But because of the side effects, PDT should be limited to those patients who cannot take conventional treatments.”
Dr. Sakamoto reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
such as Fernanda H. Sakamoto, MD, PhD.
“I love treating acne, because it can have a huge impact on our patients’ lives,” Dr. Sakamoto, a dermatologist at the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “Acne is the most common disease in dermatology, affecting about 80% of our patients. Eleven percent of these patients have difficult-to-treat acne, and it is also the No. 1 cause of depression and suicide among teenagers and young adults. And, even though there’s no strong evidence that optical treatments work better than conventional acne treatments, people still spend a lot on those treatments: more than 220 million in 2019.”
Early results from a pilot study suggest that use of a novel laser system known as Accure in patients with mild to moderate acne resulted in an 80% reduction in acne lesions at 12 weeks. The laser prototype, which uses a 1,726 nm wavelength and is being developed by researchers at the Wellman Center for Photomedicine, features a built-in thermal camera in the handpiece that allows the user to monitor the skin’s temperature during treatment.
In initial pilot studies of the device, Dr. Sakamoto and colleagues observed consistent damage of the sebaceous glands, with no damage to the epidermis, surrounding dermis, or other follicular structures. “But because the contrast of absorption of lipids and water is not very high, we needed to create a laser with features that we have never seen before,” she said. “One of them is a robust cooling system. The second prototype features a built-in thermal camera within the handpiece that allows us to see the temperature while we’re treating the patient. It also has built-in software that would shut down the laser if the temperature is too high. “This is the first laser with some safety features that will give the user direct feedback while treating the patient,” she said, noting that its “unique cooling system and real-time monitoring ... makes it different from any of the lasers we see on the market right now.”
Dr. Sakamoto and colleagues (Emil Tanghetti, MD, in San Diego, Roy Geronemus, MD, in New York, and Joel L. Cohen, MD, in Colorado) are conducting a clinical trial of the device, to evaluate whether Accure can selectively target sebaceous glands. As of Oct. 23, 2020, the study enrolled more than 50 patients, who are followed at 4, 8, 12, and 24 weeks post treatment, she said.
To date, 16 patients have completed the study, and the researchers have observed an average lesion reduction of 80% at 12 weeks post treatment, after four treatment sessions. This amounted to more than 12,000 trigger pulls of the device, with no unexpected adverse events. Average visual analogue scale pain scores immediately after treatment have been 1.09 out of 10.
Histologic assessment of skin samples collected from the study participants have revealed selective damage of the sebaceous glands with a normal epidermis and surrounding dermis. “Because this laser is near infrared, it is not absorbed by melanin, making it possible for a safe treatment in darker skin tones,” Dr. Sakamoto said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine.
“We have shown that it is possible to create a selective laser for acne treatment at 1,726 nm. We have proven it mathematically as well as with histological samples,” she said. “Now we are moving on to a larger clinical trial for the FDA clearance.”
Another strategy being developed for acne treatment is to make nonselective lasers selective by adding gold microparticles into the hair follicle and sebaceous glands, to allow the lasers to be absorbed. In a study that used a free electron laser, Dr. Sakamoto and colleagues demonstrated that these microparticles can stay within the sebaceous glands for selective damage of the sebaceous glands. In a subsequent pilot clinical trial they showed that the addition of the gold microparticles followed by a diode laser treatment made it possible to reduce both inflammatory and noninflammatory lesions.
More recently, an open-label European study of acne treatment with light absorbing gold microparticles and optical pulses demonstrated that the treatment led to an 80%-90% reduction of inflammatory lesions at 12 weeks, with a reduction of Investigator’s Global Assessment scale from 2 to 4.
The Food and Drug Administration cleared the treatment, Sebacia Microparticles, for the treatment of mild to moderate acne in September of 2018, but according to Dr. Sakamoto, “the company has struggled, as they were only commercializing the device in California and Washington, DC.”
Photodynamic therapy (PDT) is also being studied as an acne treatment. “PDT uses a photosensitizer that needs to be activated by a light source,” she noted. “The combination of red light and aminolevulinic acid (ALA) or methyl ester ALA has been shown to damage the sebaceous glands”.
In a recent randomized controlled trial that compared PDT to adapalene gel plus oral doxycycline, PDT showed superiority. “Because PDT induces apoptosis of the sebaceous glands, it causes a lot of pain and side effects after treatment,” Dr. Sakamoto said. “However, it can clear 80%-90% of acne in 80%-90% of patients. But because of the side effects, PDT should be limited to those patients who cannot take conventional treatments.”
Dr. Sakamoto reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
such as Fernanda H. Sakamoto, MD, PhD.
“I love treating acne, because it can have a huge impact on our patients’ lives,” Dr. Sakamoto, a dermatologist at the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “Acne is the most common disease in dermatology, affecting about 80% of our patients. Eleven percent of these patients have difficult-to-treat acne, and it is also the No. 1 cause of depression and suicide among teenagers and young adults. And, even though there’s no strong evidence that optical treatments work better than conventional acne treatments, people still spend a lot on those treatments: more than 220 million in 2019.”
Early results from a pilot study suggest that use of a novel laser system known as Accure in patients with mild to moderate acne resulted in an 80% reduction in acne lesions at 12 weeks. The laser prototype, which uses a 1,726 nm wavelength and is being developed by researchers at the Wellman Center for Photomedicine, features a built-in thermal camera in the handpiece that allows the user to monitor the skin’s temperature during treatment.
In initial pilot studies of the device, Dr. Sakamoto and colleagues observed consistent damage of the sebaceous glands, with no damage to the epidermis, surrounding dermis, or other follicular structures. “But because the contrast of absorption of lipids and water is not very high, we needed to create a laser with features that we have never seen before,” she said. “One of them is a robust cooling system. The second prototype features a built-in thermal camera within the handpiece that allows us to see the temperature while we’re treating the patient. It also has built-in software that would shut down the laser if the temperature is too high. “This is the first laser with some safety features that will give the user direct feedback while treating the patient,” she said, noting that its “unique cooling system and real-time monitoring ... makes it different from any of the lasers we see on the market right now.”
Dr. Sakamoto and colleagues (Emil Tanghetti, MD, in San Diego, Roy Geronemus, MD, in New York, and Joel L. Cohen, MD, in Colorado) are conducting a clinical trial of the device, to evaluate whether Accure can selectively target sebaceous glands. As of Oct. 23, 2020, the study enrolled more than 50 patients, who are followed at 4, 8, 12, and 24 weeks post treatment, she said.
To date, 16 patients have completed the study, and the researchers have observed an average lesion reduction of 80% at 12 weeks post treatment, after four treatment sessions. This amounted to more than 12,000 trigger pulls of the device, with no unexpected adverse events. Average visual analogue scale pain scores immediately after treatment have been 1.09 out of 10.
Histologic assessment of skin samples collected from the study participants have revealed selective damage of the sebaceous glands with a normal epidermis and surrounding dermis. “Because this laser is near infrared, it is not absorbed by melanin, making it possible for a safe treatment in darker skin tones,” Dr. Sakamoto said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine.
“We have shown that it is possible to create a selective laser for acne treatment at 1,726 nm. We have proven it mathematically as well as with histological samples,” she said. “Now we are moving on to a larger clinical trial for the FDA clearance.”
Another strategy being developed for acne treatment is to make nonselective lasers selective by adding gold microparticles into the hair follicle and sebaceous glands, to allow the lasers to be absorbed. In a study that used a free electron laser, Dr. Sakamoto and colleagues demonstrated that these microparticles can stay within the sebaceous glands for selective damage of the sebaceous glands. In a subsequent pilot clinical trial they showed that the addition of the gold microparticles followed by a diode laser treatment made it possible to reduce both inflammatory and noninflammatory lesions.
More recently, an open-label European study of acne treatment with light absorbing gold microparticles and optical pulses demonstrated that the treatment led to an 80%-90% reduction of inflammatory lesions at 12 weeks, with a reduction of Investigator’s Global Assessment scale from 2 to 4.
The Food and Drug Administration cleared the treatment, Sebacia Microparticles, for the treatment of mild to moderate acne in September of 2018, but according to Dr. Sakamoto, “the company has struggled, as they were only commercializing the device in California and Washington, DC.”
Photodynamic therapy (PDT) is also being studied as an acne treatment. “PDT uses a photosensitizer that needs to be activated by a light source,” she noted. “The combination of red light and aminolevulinic acid (ALA) or methyl ester ALA has been shown to damage the sebaceous glands”.
In a recent randomized controlled trial that compared PDT to adapalene gel plus oral doxycycline, PDT showed superiority. “Because PDT induces apoptosis of the sebaceous glands, it causes a lot of pain and side effects after treatment,” Dr. Sakamoto said. “However, it can clear 80%-90% of acne in 80%-90% of patients. But because of the side effects, PDT should be limited to those patients who cannot take conventional treatments.”
Dr. Sakamoto reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
EXPERT ANALYSIS FROM A LASER & AESTHETIC SKIN THERAPY COURSE
Tattoo removal techniques continue to be refined
According to a 2016 Harris Poll, 29% of Americans have at least one tattoo, up from 21% in 2012. At the same time, 23% of Americans polled in 2016 regret having their tattoo, which means big business for dermatologists who practice laser tattoo removal.
Prior to the theory of selective photothermolysis, tattoo removal mostly consisted of chemical or mechanical abrasion, surgical removal, or using some sort of caustic chemical or thermal destruction of the tattoo, Omar A. Ibrahimi, MD, PhD, said during a virtual course on laser and aesthetic skin therapy. “The earliest lasers prior to refinement by the theory of selective photothermolysis also fell into these categories: just basically crudely removing the skin and trying to get under to where the tattoo is,” said Dr. Ibrahimi, a dermatologist with the Connecticut Skin Institute in Stamford. “These would often heal with horrible scarring.”
Today, clinicians use Q-switched nanosecond and picosecond lasers for tattoo removal, though appropriate wavelengths need to be selected based on the tattoo ink color. Tattoo ink particles average about 0.1 mcm in size, and the thermal relaxation size works out to be about 10 nanoseconds. Black is the most common color dermatologists will treat. “For that, you can typically use a 1064, which has the highest absorption, but you can also use many of the other wavelengths,” he said. “The other colors are less common, followed by red, for which you would use a 532-nm wavelength.”
The clinical endpoint to strive for during tattoo removal is a whitening of the ink. That typically fades after about 20 minutes. “This whitening corresponds to cavitation [the production of gas vacuoles in the cells that were holding the ink],” Dr. Ibrahimi explained during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “These vacuoles are what lead to the whitening when using a high-gigawatt laser in a very short pulse. This causes highly localized heating, cavitation, and cell rupture. We don’t fully understand how tattoos are removed today, but the working models include some of the residual ink coming out through transepidermal elimination, some of it being removed via lymphatics, and some of it being removed by rephagocytosis.”
For optimal results, determine if the tattoo is professional, amateur, traumatic, or cosmetic. “That’s going to give you some insight as to what kind of expectations to set for the patient,” he said. “Black ink is often the easiest to remove, while certain colors like white are more challenging. Certain colors are more prone to paradoxical ink darkening, like red or orange, or pink. These can undergo a chemical reaction where they darken. This is something important to discuss with patients in advance.”
Older tattoos “tend to be less hearty” and usually respond better to laser, he continued. Location of the tattoo also plays a role. “I find that tattoos below the knee are very slow to respond. Smaller tattoos will respond faster.”
During the focused medical exam, ask patients about any history of keloid scarring, vitiligo or any dermatologic conditions with a Koebner phenomenon, and rule out a history of parental gold salt administration for arthritis. “During your informed consent you want to make sure you address the expected healing time and the risks such as hyper- and hypopigmentation, blistering, and scarring,” Dr. Ibrahimi said. “You also want to set the expectation that this is not going to be a one and done procedure. Laser tattoo removal takes a series of treatments, often more than what we think – sometimes in the range of 15-20. And you may not get complete clearance. I liken it to breaking it up enough so that if somebody sees it, they won’t be able to recognize what the tattoo is. But you won’t be able to erase it 100%.”
Black, dark blue, and red tattoo colors respond best to laser light. Light blue, green, and purple colors are slower to respond, while yellow and orange colors respond poorly. “Now that we have picosecond lasers, we’re a little better at treating these tougher colors, but I think we still have a lot of room for improvement,” Dr. Ibrahimi said.
Melanin is a competing chromophore, which complicates treatment of tanned individuals and those with darker skin types. “The Q-switched 1064-nm laser is the safest device to use for these patients but it’s not effective for many ink colors,” he said.
Options to keep patients comfortable during the procedure include application of ice or forced chilled air. “You can also use topical anesthetics such as EMLA or liposomal lidocaine cream under occlusion,” he said. “You can also use injectable lidocaine. If you go that route, I recommend a ring block. If you inject right into the tattoo sometimes the ink can get leeched out after treatment. As for spot size, a larger spot size will penetrate deeper, so I try to treat tattoos with the biggest spot size. It also results in less bleeding, less splatter, less side effects, and you get better results.”
Common adverse events from tattoo removal include prolonged erythema, blistering, hyperpigmentation, hypopigmentation, and scarring. Less frequent complications include ink darkening, chrysiasis, and transient immunoreactivity. “We don’t really know what’s in a lot of these ink residues,” Dr. Ibrahimi said. “We know they’re getting mobilized and some of it’s going into the lymphatics. What’s happening with these ink particles? We don’t fully know.”
He also warned against using hair-removal devices to treat a tattoo. “It is the wrong pulse duration,” he said. “You need a picosecond or nanosecond device. You cannot use any other pulse durations, or you will horribly scar your patient.”
In 2012, R. Rox Anderson, MD, director of the Wellman Center for Photomedicine at Massachusetts General Hospital, and colleagues published results of a study that compared a single Q-switched laser treatment pass with four treatment passes separated by 20 minutes. After treating 18 tattoos in 12 adults, they found that the technique, known as the R20 method, was more effective than a single-pass treatment (P < .01). “Subsequent papers have shown that this result isn’t as impressive as initially reported, but I think it’s a method that persists,” Dr. Ibrahimi said.
Another recent advance is use of a topical square silicone patch infused with perfluorodecalin patch during tattoo removal, which has been shown to reduce epidermal whitening. “So, instead of waiting 20 minutes you wait 0 minutes,” he said. “This is called the R0 method,” he added, noting that there are also some secondary benefits to using this patch, including possibly helping as an optical clearing agent for deeper penetration of the laser. “Often after treatment you can see ink on the underside of the patch, which speaks to the transdermal elimination mechanism of action for removal of tattoos.”
As for future directions, Dr. Ibrahimi predicted that there will be better picosecond lasers coming down the pike. He also anticipates that Soliton’s Rapid Acoustic Pulse (RAP) device will make a significant impact in the field. The device was cleared for tattoo removal in 2019 and is being investigated as an option to improve the appearance of cellulite. The manufacturer anticipates that an upgraded RAP device will be cleared for use by the end of the first quarter of 2021.
Dr. Ibrahimi disclosed that he has received research funding and speaker honorarium from Cutera, Lumenis, Lutronic, and Syneron-Candela. He also holds stock in Soliton.
According to a 2016 Harris Poll, 29% of Americans have at least one tattoo, up from 21% in 2012. At the same time, 23% of Americans polled in 2016 regret having their tattoo, which means big business for dermatologists who practice laser tattoo removal.
Prior to the theory of selective photothermolysis, tattoo removal mostly consisted of chemical or mechanical abrasion, surgical removal, or using some sort of caustic chemical or thermal destruction of the tattoo, Omar A. Ibrahimi, MD, PhD, said during a virtual course on laser and aesthetic skin therapy. “The earliest lasers prior to refinement by the theory of selective photothermolysis also fell into these categories: just basically crudely removing the skin and trying to get under to where the tattoo is,” said Dr. Ibrahimi, a dermatologist with the Connecticut Skin Institute in Stamford. “These would often heal with horrible scarring.”
Today, clinicians use Q-switched nanosecond and picosecond lasers for tattoo removal, though appropriate wavelengths need to be selected based on the tattoo ink color. Tattoo ink particles average about 0.1 mcm in size, and the thermal relaxation size works out to be about 10 nanoseconds. Black is the most common color dermatologists will treat. “For that, you can typically use a 1064, which has the highest absorption, but you can also use many of the other wavelengths,” he said. “The other colors are less common, followed by red, for which you would use a 532-nm wavelength.”
The clinical endpoint to strive for during tattoo removal is a whitening of the ink. That typically fades after about 20 minutes. “This whitening corresponds to cavitation [the production of gas vacuoles in the cells that were holding the ink],” Dr. Ibrahimi explained during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “These vacuoles are what lead to the whitening when using a high-gigawatt laser in a very short pulse. This causes highly localized heating, cavitation, and cell rupture. We don’t fully understand how tattoos are removed today, but the working models include some of the residual ink coming out through transepidermal elimination, some of it being removed via lymphatics, and some of it being removed by rephagocytosis.”
For optimal results, determine if the tattoo is professional, amateur, traumatic, or cosmetic. “That’s going to give you some insight as to what kind of expectations to set for the patient,” he said. “Black ink is often the easiest to remove, while certain colors like white are more challenging. Certain colors are more prone to paradoxical ink darkening, like red or orange, or pink. These can undergo a chemical reaction where they darken. This is something important to discuss with patients in advance.”
Older tattoos “tend to be less hearty” and usually respond better to laser, he continued. Location of the tattoo also plays a role. “I find that tattoos below the knee are very slow to respond. Smaller tattoos will respond faster.”
During the focused medical exam, ask patients about any history of keloid scarring, vitiligo or any dermatologic conditions with a Koebner phenomenon, and rule out a history of parental gold salt administration for arthritis. “During your informed consent you want to make sure you address the expected healing time and the risks such as hyper- and hypopigmentation, blistering, and scarring,” Dr. Ibrahimi said. “You also want to set the expectation that this is not going to be a one and done procedure. Laser tattoo removal takes a series of treatments, often more than what we think – sometimes in the range of 15-20. And you may not get complete clearance. I liken it to breaking it up enough so that if somebody sees it, they won’t be able to recognize what the tattoo is. But you won’t be able to erase it 100%.”
Black, dark blue, and red tattoo colors respond best to laser light. Light blue, green, and purple colors are slower to respond, while yellow and orange colors respond poorly. “Now that we have picosecond lasers, we’re a little better at treating these tougher colors, but I think we still have a lot of room for improvement,” Dr. Ibrahimi said.
Melanin is a competing chromophore, which complicates treatment of tanned individuals and those with darker skin types. “The Q-switched 1064-nm laser is the safest device to use for these patients but it’s not effective for many ink colors,” he said.
Options to keep patients comfortable during the procedure include application of ice or forced chilled air. “You can also use topical anesthetics such as EMLA or liposomal lidocaine cream under occlusion,” he said. “You can also use injectable lidocaine. If you go that route, I recommend a ring block. If you inject right into the tattoo sometimes the ink can get leeched out after treatment. As for spot size, a larger spot size will penetrate deeper, so I try to treat tattoos with the biggest spot size. It also results in less bleeding, less splatter, less side effects, and you get better results.”
Common adverse events from tattoo removal include prolonged erythema, blistering, hyperpigmentation, hypopigmentation, and scarring. Less frequent complications include ink darkening, chrysiasis, and transient immunoreactivity. “We don’t really know what’s in a lot of these ink residues,” Dr. Ibrahimi said. “We know they’re getting mobilized and some of it’s going into the lymphatics. What’s happening with these ink particles? We don’t fully know.”
He also warned against using hair-removal devices to treat a tattoo. “It is the wrong pulse duration,” he said. “You need a picosecond or nanosecond device. You cannot use any other pulse durations, or you will horribly scar your patient.”
In 2012, R. Rox Anderson, MD, director of the Wellman Center for Photomedicine at Massachusetts General Hospital, and colleagues published results of a study that compared a single Q-switched laser treatment pass with four treatment passes separated by 20 minutes. After treating 18 tattoos in 12 adults, they found that the technique, known as the R20 method, was more effective than a single-pass treatment (P < .01). “Subsequent papers have shown that this result isn’t as impressive as initially reported, but I think it’s a method that persists,” Dr. Ibrahimi said.
Another recent advance is use of a topical square silicone patch infused with perfluorodecalin patch during tattoo removal, which has been shown to reduce epidermal whitening. “So, instead of waiting 20 minutes you wait 0 minutes,” he said. “This is called the R0 method,” he added, noting that there are also some secondary benefits to using this patch, including possibly helping as an optical clearing agent for deeper penetration of the laser. “Often after treatment you can see ink on the underside of the patch, which speaks to the transdermal elimination mechanism of action for removal of tattoos.”
As for future directions, Dr. Ibrahimi predicted that there will be better picosecond lasers coming down the pike. He also anticipates that Soliton’s Rapid Acoustic Pulse (RAP) device will make a significant impact in the field. The device was cleared for tattoo removal in 2019 and is being investigated as an option to improve the appearance of cellulite. The manufacturer anticipates that an upgraded RAP device will be cleared for use by the end of the first quarter of 2021.
Dr. Ibrahimi disclosed that he has received research funding and speaker honorarium from Cutera, Lumenis, Lutronic, and Syneron-Candela. He also holds stock in Soliton.
According to a 2016 Harris Poll, 29% of Americans have at least one tattoo, up from 21% in 2012. At the same time, 23% of Americans polled in 2016 regret having their tattoo, which means big business for dermatologists who practice laser tattoo removal.
Prior to the theory of selective photothermolysis, tattoo removal mostly consisted of chemical or mechanical abrasion, surgical removal, or using some sort of caustic chemical or thermal destruction of the tattoo, Omar A. Ibrahimi, MD, PhD, said during a virtual course on laser and aesthetic skin therapy. “The earliest lasers prior to refinement by the theory of selective photothermolysis also fell into these categories: just basically crudely removing the skin and trying to get under to where the tattoo is,” said Dr. Ibrahimi, a dermatologist with the Connecticut Skin Institute in Stamford. “These would often heal with horrible scarring.”
Today, clinicians use Q-switched nanosecond and picosecond lasers for tattoo removal, though appropriate wavelengths need to be selected based on the tattoo ink color. Tattoo ink particles average about 0.1 mcm in size, and the thermal relaxation size works out to be about 10 nanoseconds. Black is the most common color dermatologists will treat. “For that, you can typically use a 1064, which has the highest absorption, but you can also use many of the other wavelengths,” he said. “The other colors are less common, followed by red, for which you would use a 532-nm wavelength.”
The clinical endpoint to strive for during tattoo removal is a whitening of the ink. That typically fades after about 20 minutes. “This whitening corresponds to cavitation [the production of gas vacuoles in the cells that were holding the ink],” Dr. Ibrahimi explained during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “These vacuoles are what lead to the whitening when using a high-gigawatt laser in a very short pulse. This causes highly localized heating, cavitation, and cell rupture. We don’t fully understand how tattoos are removed today, but the working models include some of the residual ink coming out through transepidermal elimination, some of it being removed via lymphatics, and some of it being removed by rephagocytosis.”
For optimal results, determine if the tattoo is professional, amateur, traumatic, or cosmetic. “That’s going to give you some insight as to what kind of expectations to set for the patient,” he said. “Black ink is often the easiest to remove, while certain colors like white are more challenging. Certain colors are more prone to paradoxical ink darkening, like red or orange, or pink. These can undergo a chemical reaction where they darken. This is something important to discuss with patients in advance.”
Older tattoos “tend to be less hearty” and usually respond better to laser, he continued. Location of the tattoo also plays a role. “I find that tattoos below the knee are very slow to respond. Smaller tattoos will respond faster.”
During the focused medical exam, ask patients about any history of keloid scarring, vitiligo or any dermatologic conditions with a Koebner phenomenon, and rule out a history of parental gold salt administration for arthritis. “During your informed consent you want to make sure you address the expected healing time and the risks such as hyper- and hypopigmentation, blistering, and scarring,” Dr. Ibrahimi said. “You also want to set the expectation that this is not going to be a one and done procedure. Laser tattoo removal takes a series of treatments, often more than what we think – sometimes in the range of 15-20. And you may not get complete clearance. I liken it to breaking it up enough so that if somebody sees it, they won’t be able to recognize what the tattoo is. But you won’t be able to erase it 100%.”
Black, dark blue, and red tattoo colors respond best to laser light. Light blue, green, and purple colors are slower to respond, while yellow and orange colors respond poorly. “Now that we have picosecond lasers, we’re a little better at treating these tougher colors, but I think we still have a lot of room for improvement,” Dr. Ibrahimi said.
Melanin is a competing chromophore, which complicates treatment of tanned individuals and those with darker skin types. “The Q-switched 1064-nm laser is the safest device to use for these patients but it’s not effective for many ink colors,” he said.
Options to keep patients comfortable during the procedure include application of ice or forced chilled air. “You can also use topical anesthetics such as EMLA or liposomal lidocaine cream under occlusion,” he said. “You can also use injectable lidocaine. If you go that route, I recommend a ring block. If you inject right into the tattoo sometimes the ink can get leeched out after treatment. As for spot size, a larger spot size will penetrate deeper, so I try to treat tattoos with the biggest spot size. It also results in less bleeding, less splatter, less side effects, and you get better results.”
Common adverse events from tattoo removal include prolonged erythema, blistering, hyperpigmentation, hypopigmentation, and scarring. Less frequent complications include ink darkening, chrysiasis, and transient immunoreactivity. “We don’t really know what’s in a lot of these ink residues,” Dr. Ibrahimi said. “We know they’re getting mobilized and some of it’s going into the lymphatics. What’s happening with these ink particles? We don’t fully know.”
He also warned against using hair-removal devices to treat a tattoo. “It is the wrong pulse duration,” he said. “You need a picosecond or nanosecond device. You cannot use any other pulse durations, or you will horribly scar your patient.”
In 2012, R. Rox Anderson, MD, director of the Wellman Center for Photomedicine at Massachusetts General Hospital, and colleagues published results of a study that compared a single Q-switched laser treatment pass with four treatment passes separated by 20 minutes. After treating 18 tattoos in 12 adults, they found that the technique, known as the R20 method, was more effective than a single-pass treatment (P < .01). “Subsequent papers have shown that this result isn’t as impressive as initially reported, but I think it’s a method that persists,” Dr. Ibrahimi said.
Another recent advance is use of a topical square silicone patch infused with perfluorodecalin patch during tattoo removal, which has been shown to reduce epidermal whitening. “So, instead of waiting 20 minutes you wait 0 minutes,” he said. “This is called the R0 method,” he added, noting that there are also some secondary benefits to using this patch, including possibly helping as an optical clearing agent for deeper penetration of the laser. “Often after treatment you can see ink on the underside of the patch, which speaks to the transdermal elimination mechanism of action for removal of tattoos.”
As for future directions, Dr. Ibrahimi predicted that there will be better picosecond lasers coming down the pike. He also anticipates that Soliton’s Rapid Acoustic Pulse (RAP) device will make a significant impact in the field. The device was cleared for tattoo removal in 2019 and is being investigated as an option to improve the appearance of cellulite. The manufacturer anticipates that an upgraded RAP device will be cleared for use by the end of the first quarter of 2021.
Dr. Ibrahimi disclosed that he has received research funding and speaker honorarium from Cutera, Lumenis, Lutronic, and Syneron-Candela. He also holds stock in Soliton.
FROM A LASER & AESTHETIC SKIN THERAPY COURSE
Expert spotlights three emerging technologies for dermatology practice
New technologies being developed at the Wellman Center for Photomedicine, Boston, that .
During a virtual course on laser and aesthetic skin therapy, Lilit Garibyan, MD, PhD, discussed findings from a swine study published online in January 2020 that used an injectable physiologic ice slurry for the nonsurgical removal of fat, a technology that could give CoolSculpting a run for its money. “It does lead to more efficient and effective cryolipolysis,” said Dr. Garibyan, the lead study author who is an assistant professor of dermatology at Harvard University, and director of The Magic Wand Initiative at the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston. “The treatment of fat tissue with ice slurry injection can be done in less than 1 minute, as opposed to an hour of cooling with CoolSculpting. In addition, because cooling is delivered directly into target tissue, it is more effective.”
For the study, she and her colleagues at the Wellman Center injected the slurry – a mix of ice, saline, and glycol – into the flanks of swine and followed them for up to 8 weeks. They used ultrasound imaging to show the location of the fat loss and to quantify it. The researchers observed about 40%-50% loss of fat in the treated area, compared with a 60% fat gain in swine who served as controls. “This is because the pig is growing and gaining weight, so the fat is increasing,” she explained.
Gross histologic images also showed fat loss in the subcutaneous fat tissue of treated swine, but not in controls. “When we quantified this loss, there was about a 60% loss of fat after a single injection of ice slurry in the subcutaneous fat,” Dr. Garibyan said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “On histology there was loss of fat in the subcutaneous area and it was replaced by new collagen. No damage to surrounding skin or muscle tissue was seen.”
She characterized the approach as “a minimally invasive and novel method of adipose tissue removal. It’s very simple, because it’s just a simple injection, and it’s very efficient and effective in fat removal. Most importantly, it can target any anatomic site accessible with a needle.”
Human studies are currently underway.
Another emerging technology Dr. Garibyan discussed is a novel controlled skin cooling device for the treatment of benign pigmented lesions. The approach, known as Cryomodulation, was invented by R. Rox Anderson, MD, Dieter Manstein, MD, PhD, and Henry HL Chan, MD, at Massachusetts General Hospital, Boston, and is being commercialized by R2 Technologies. It delivers precise controlled and titratable freezing of benign pigmented lesions without damage to the epidermal barrier. It has been cleared by the Food and Drug Administration, and R2 Technologies plans to launch its first commercial product in the United States in December 2020.
The handpiece of the device, which is placed on top of the skin, provides localized and controlled freezing to targeted benign pigmented lesions. “The cold, or the freeze, is delivered to where the melanocytes reside,” Dr. Garibyan said. “The ice nucleation essentially pauses melanin production. As cell turnover occurs, cells that are melanin-free migrate upward and renew freshly healthy skin. So, melanocyte function is still preserved but there is no destruction to the epidermal barrier. This technology is totally color blind, and there is no persistent inflammatory response.”
After this treatment, histology reveals a reduction of epidermal melanin without destruction of melanocytes. The treatment impairs melanocyte transfer, but not the melanocytes. “Clinically, that is seen as lightening of the skin,” she said. More than 550 patients have been treated with Cryomodulation to demonstrate its safety and effectiveness, described in a study published in 2019, and an ASLMS e-poster.
The final technology Dr. Garibyan discussed is a novel device for removing dermal pigment with a highly focused laser beam. “The problem with current lasers is that the maximum absorption of energy happens at the dermal/epidermal junction,” she said. “This not only increases the risk of epidermal injury, especially in skin of color, but it also leaves very little energy to reach the pigmented target tissue or cells. In addition, there is scattering in the skin, which also reduces the amount of fluence or energy that can reach the target depth, therefore reducing the efficacy of treatment with currently available laser.”
The investigative focused laser beam with high-speed scanning creates a large differential between the fluence at the surface and the fluence at the target, which improves safety. “It’s able to deliver enhanced energy to the target,” she said. “Therefore it’s more effective than destroying the target pigmented cells. There is no injury outside of the focal point, so it offers improved safety, efficacy, and spatial selectivity. The end result on histology is a selective destruction of the pigmented cells, which are typically melanophages.”
Dr. Garibyan predicted that this device will be an ideal therapy for postinflammatory hyperpigmentation and for melasma, “as no effective therapies are available for those conditions.”
She disclosed that she has received royalties/inventorship assigned to MGH. She holds equity in, is a consultant to, and is a member of the scientific advisory board of Brixton Biosciences. She is a consultant to Vyome Therapeutics, Blossom Innovations, Aegle Therapeutics, and ClearifiRx.
New technologies being developed at the Wellman Center for Photomedicine, Boston, that .
During a virtual course on laser and aesthetic skin therapy, Lilit Garibyan, MD, PhD, discussed findings from a swine study published online in January 2020 that used an injectable physiologic ice slurry for the nonsurgical removal of fat, a technology that could give CoolSculpting a run for its money. “It does lead to more efficient and effective cryolipolysis,” said Dr. Garibyan, the lead study author who is an assistant professor of dermatology at Harvard University, and director of The Magic Wand Initiative at the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston. “The treatment of fat tissue with ice slurry injection can be done in less than 1 minute, as opposed to an hour of cooling with CoolSculpting. In addition, because cooling is delivered directly into target tissue, it is more effective.”
For the study, she and her colleagues at the Wellman Center injected the slurry – a mix of ice, saline, and glycol – into the flanks of swine and followed them for up to 8 weeks. They used ultrasound imaging to show the location of the fat loss and to quantify it. The researchers observed about 40%-50% loss of fat in the treated area, compared with a 60% fat gain in swine who served as controls. “This is because the pig is growing and gaining weight, so the fat is increasing,” she explained.
Gross histologic images also showed fat loss in the subcutaneous fat tissue of treated swine, but not in controls. “When we quantified this loss, there was about a 60% loss of fat after a single injection of ice slurry in the subcutaneous fat,” Dr. Garibyan said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “On histology there was loss of fat in the subcutaneous area and it was replaced by new collagen. No damage to surrounding skin or muscle tissue was seen.”
She characterized the approach as “a minimally invasive and novel method of adipose tissue removal. It’s very simple, because it’s just a simple injection, and it’s very efficient and effective in fat removal. Most importantly, it can target any anatomic site accessible with a needle.”
Human studies are currently underway.
Another emerging technology Dr. Garibyan discussed is a novel controlled skin cooling device for the treatment of benign pigmented lesions. The approach, known as Cryomodulation, was invented by R. Rox Anderson, MD, Dieter Manstein, MD, PhD, and Henry HL Chan, MD, at Massachusetts General Hospital, Boston, and is being commercialized by R2 Technologies. It delivers precise controlled and titratable freezing of benign pigmented lesions without damage to the epidermal barrier. It has been cleared by the Food and Drug Administration, and R2 Technologies plans to launch its first commercial product in the United States in December 2020.
The handpiece of the device, which is placed on top of the skin, provides localized and controlled freezing to targeted benign pigmented lesions. “The cold, or the freeze, is delivered to where the melanocytes reside,” Dr. Garibyan said. “The ice nucleation essentially pauses melanin production. As cell turnover occurs, cells that are melanin-free migrate upward and renew freshly healthy skin. So, melanocyte function is still preserved but there is no destruction to the epidermal barrier. This technology is totally color blind, and there is no persistent inflammatory response.”
After this treatment, histology reveals a reduction of epidermal melanin without destruction of melanocytes. The treatment impairs melanocyte transfer, but not the melanocytes. “Clinically, that is seen as lightening of the skin,” she said. More than 550 patients have been treated with Cryomodulation to demonstrate its safety and effectiveness, described in a study published in 2019, and an ASLMS e-poster.
The final technology Dr. Garibyan discussed is a novel device for removing dermal pigment with a highly focused laser beam. “The problem with current lasers is that the maximum absorption of energy happens at the dermal/epidermal junction,” she said. “This not only increases the risk of epidermal injury, especially in skin of color, but it also leaves very little energy to reach the pigmented target tissue or cells. In addition, there is scattering in the skin, which also reduces the amount of fluence or energy that can reach the target depth, therefore reducing the efficacy of treatment with currently available laser.”
The investigative focused laser beam with high-speed scanning creates a large differential between the fluence at the surface and the fluence at the target, which improves safety. “It’s able to deliver enhanced energy to the target,” she said. “Therefore it’s more effective than destroying the target pigmented cells. There is no injury outside of the focal point, so it offers improved safety, efficacy, and spatial selectivity. The end result on histology is a selective destruction of the pigmented cells, which are typically melanophages.”
Dr. Garibyan predicted that this device will be an ideal therapy for postinflammatory hyperpigmentation and for melasma, “as no effective therapies are available for those conditions.”
She disclosed that she has received royalties/inventorship assigned to MGH. She holds equity in, is a consultant to, and is a member of the scientific advisory board of Brixton Biosciences. She is a consultant to Vyome Therapeutics, Blossom Innovations, Aegle Therapeutics, and ClearifiRx.
New technologies being developed at the Wellman Center for Photomedicine, Boston, that .
During a virtual course on laser and aesthetic skin therapy, Lilit Garibyan, MD, PhD, discussed findings from a swine study published online in January 2020 that used an injectable physiologic ice slurry for the nonsurgical removal of fat, a technology that could give CoolSculpting a run for its money. “It does lead to more efficient and effective cryolipolysis,” said Dr. Garibyan, the lead study author who is an assistant professor of dermatology at Harvard University, and director of The Magic Wand Initiative at the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston. “The treatment of fat tissue with ice slurry injection can be done in less than 1 minute, as opposed to an hour of cooling with CoolSculpting. In addition, because cooling is delivered directly into target tissue, it is more effective.”
For the study, she and her colleagues at the Wellman Center injected the slurry – a mix of ice, saline, and glycol – into the flanks of swine and followed them for up to 8 weeks. They used ultrasound imaging to show the location of the fat loss and to quantify it. The researchers observed about 40%-50% loss of fat in the treated area, compared with a 60% fat gain in swine who served as controls. “This is because the pig is growing and gaining weight, so the fat is increasing,” she explained.
Gross histologic images also showed fat loss in the subcutaneous fat tissue of treated swine, but not in controls. “When we quantified this loss, there was about a 60% loss of fat after a single injection of ice slurry in the subcutaneous fat,” Dr. Garibyan said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “On histology there was loss of fat in the subcutaneous area and it was replaced by new collagen. No damage to surrounding skin or muscle tissue was seen.”
She characterized the approach as “a minimally invasive and novel method of adipose tissue removal. It’s very simple, because it’s just a simple injection, and it’s very efficient and effective in fat removal. Most importantly, it can target any anatomic site accessible with a needle.”
Human studies are currently underway.
Another emerging technology Dr. Garibyan discussed is a novel controlled skin cooling device for the treatment of benign pigmented lesions. The approach, known as Cryomodulation, was invented by R. Rox Anderson, MD, Dieter Manstein, MD, PhD, and Henry HL Chan, MD, at Massachusetts General Hospital, Boston, and is being commercialized by R2 Technologies. It delivers precise controlled and titratable freezing of benign pigmented lesions without damage to the epidermal barrier. It has been cleared by the Food and Drug Administration, and R2 Technologies plans to launch its first commercial product in the United States in December 2020.
The handpiece of the device, which is placed on top of the skin, provides localized and controlled freezing to targeted benign pigmented lesions. “The cold, or the freeze, is delivered to where the melanocytes reside,” Dr. Garibyan said. “The ice nucleation essentially pauses melanin production. As cell turnover occurs, cells that are melanin-free migrate upward and renew freshly healthy skin. So, melanocyte function is still preserved but there is no destruction to the epidermal barrier. This technology is totally color blind, and there is no persistent inflammatory response.”
After this treatment, histology reveals a reduction of epidermal melanin without destruction of melanocytes. The treatment impairs melanocyte transfer, but not the melanocytes. “Clinically, that is seen as lightening of the skin,” she said. More than 550 patients have been treated with Cryomodulation to demonstrate its safety and effectiveness, described in a study published in 2019, and an ASLMS e-poster.
The final technology Dr. Garibyan discussed is a novel device for removing dermal pigment with a highly focused laser beam. “The problem with current lasers is that the maximum absorption of energy happens at the dermal/epidermal junction,” she said. “This not only increases the risk of epidermal injury, especially in skin of color, but it also leaves very little energy to reach the pigmented target tissue or cells. In addition, there is scattering in the skin, which also reduces the amount of fluence or energy that can reach the target depth, therefore reducing the efficacy of treatment with currently available laser.”
The investigative focused laser beam with high-speed scanning creates a large differential between the fluence at the surface and the fluence at the target, which improves safety. “It’s able to deliver enhanced energy to the target,” she said. “Therefore it’s more effective than destroying the target pigmented cells. There is no injury outside of the focal point, so it offers improved safety, efficacy, and spatial selectivity. The end result on histology is a selective destruction of the pigmented cells, which are typically melanophages.”
Dr. Garibyan predicted that this device will be an ideal therapy for postinflammatory hyperpigmentation and for melasma, “as no effective therapies are available for those conditions.”
She disclosed that she has received royalties/inventorship assigned to MGH. She holds equity in, is a consultant to, and is a member of the scientific advisory board of Brixton Biosciences. She is a consultant to Vyome Therapeutics, Blossom Innovations, Aegle Therapeutics, and ClearifiRx.
EXPERT ANALYSIS FROM A LASER & AESTHETIC SKIN THERAPY COURSE
Maintaining credibility when evaluating new dermatologic technologies
A healthy dose of skepticism is reasonable when evaluating new technologies to potentially use in your practice, but being overly critical can backfire, according to E. Victor Ross, MD.
During a virtual course on laser and aesthetic skin therapy, he noted that dermatologists may be evaluating new technologies in roles as an investigator or provider, or as a provider who buys the equipment outright, without any direct compensation from industry. “If you’re doing investigative work, you’re already in a conflicted situation because you’re trying to serve two masters,” said Dr. Ross, who directs the Scripps Clinic Laser and Cosmetic Dermatology Center in San Diego. “You’re trying to advance science and to make sure your reputation is intact and maybe even enhanced, but you’re also kind of at the whim of industry, because they have a goal. Sometimes the goals are similar. Your goal is to advance the technology and advance patient care, but they have a goal of selling equipment. Those goals should be compatible, and they should be in the same pathway; they should be parallel.”
Being too critical as an investigator/researcher of new technologies can hinder further interactions with industry. “Sometimes your criticism can be premature, and small changes in the technology and/or waiting for results can validate the technology,” he said. “Maybe it’s a skin-tightening technology, or maybe there’s something you don’t like about it; you have a prototype and you say: ‘This is not so great,’ but these are studies that take a long time to evaluate, like hair removal. Generally, if you’re a big critic, after a while, nobody wants to hear it. So, you can’t be overly critical. I think you can be skeptical, but not overly critical.”
On the other hand, Dr. Ross continued, if you cheerlead for the device industry, your reputation may be sold to the highest bidder. “You may compromise your ability to be trusted in future work or presentations. I’ve regretted some things I said many years ago, not because I was being dishonest but because I really wasn’t as skeptical as I should have been about the types of results I was getting. You do tend to get on a bandwagon; you want everything to be positive,” he said, adding: “The other thing that can happen is, if things don’t work out with other buyers, they’re going to say, ‘I can’t get the same results.’ If somebody can’t replicate what you’re doing, it’s going to put your reputation on the line to some degree. So, you have to be very careful.”
Before agreeing to evaluate a new technology as an investigator or in your own practice, Dr. Ross recommended asking yourself if the intervention makes sense on a gross or microanatomic level. “There should be a physical basis for how it works, and ideally there should be some histology that backs it up,” he said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “Where is the data to support the outcomes? If it is your own data, how skeptical have you been in its acquisition and assessment?”
When evaluating a new technology, Dr. Ross recommended starting with test spots and low settings. “It behooves you not to be too aggressive because there are some untoward things you may not see right away.” He advised evaluating short- and long-term outcomes and being wary of devices that heat very deeply and rely on long-term outcomes, such as hair removal, acne improvement, scar improvement, and skin tightening – all of which require long intervals for assessment. As one of his “Ross Rules” states: “The deeper the heating and the less focused the heating, the less we can expect results.” Another Ross Rule calls for being skeptical about technologies without an immediate finding that can be “seen” on routine histology. “To me, the deeper the procedure, particularly if it’s not fractional, the confidence of my outcome is diminished,” he said. “The exception is any intervention that relies on selective photothermolysis.”
Using new technologies in practice
Dr. Ross also offered tips on how to properly incorporate newly approved technologies into your practice safely, including the use of visual endpoints. “That’s tough for technologies like laser liposuction or fractional technologies, where we rely more on ‘guidelines’ than endpoints,” he said. In addition, he recommended gradually increasing settings and using test areas to stall and/or hone techniques. “It’s exciting, but you’re like a test pilot. You want to be careful that you are doing things that are not likely to risk the patient. Try some off-the-face applications first. When you’re using a new technology, push a little harder with each patient so you can find a safe zone for that technology. You don’t have to get it all in one treatment session. Be conservative. Anticipate that you may be underassessing the immediate response.”
Above all, be careful. “Use your judgment more than laser company-prescribed settings,” he said. “Most companies have the go-by settings on the low side for patient protection, but sometimes efficacy suffers. Use cautiously on friends and family. If you treat a spouse or a friend and things don’t go perfectly, that’s always a recipe for a problem.”
Dr. Ross reported having received financial grants and research grants from Candela, Cutera, Lumenis, and Lutronic; consulting fees from Palomar; and honoraria from Cynosure, Cutera, and Lumenis. He has also received research funding from Venous Concepts, Pulsed Biosciences, and Cynosure.
A healthy dose of skepticism is reasonable when evaluating new technologies to potentially use in your practice, but being overly critical can backfire, according to E. Victor Ross, MD.
During a virtual course on laser and aesthetic skin therapy, he noted that dermatologists may be evaluating new technologies in roles as an investigator or provider, or as a provider who buys the equipment outright, without any direct compensation from industry. “If you’re doing investigative work, you’re already in a conflicted situation because you’re trying to serve two masters,” said Dr. Ross, who directs the Scripps Clinic Laser and Cosmetic Dermatology Center in San Diego. “You’re trying to advance science and to make sure your reputation is intact and maybe even enhanced, but you’re also kind of at the whim of industry, because they have a goal. Sometimes the goals are similar. Your goal is to advance the technology and advance patient care, but they have a goal of selling equipment. Those goals should be compatible, and they should be in the same pathway; they should be parallel.”
Being too critical as an investigator/researcher of new technologies can hinder further interactions with industry. “Sometimes your criticism can be premature, and small changes in the technology and/or waiting for results can validate the technology,” he said. “Maybe it’s a skin-tightening technology, or maybe there’s something you don’t like about it; you have a prototype and you say: ‘This is not so great,’ but these are studies that take a long time to evaluate, like hair removal. Generally, if you’re a big critic, after a while, nobody wants to hear it. So, you can’t be overly critical. I think you can be skeptical, but not overly critical.”
On the other hand, Dr. Ross continued, if you cheerlead for the device industry, your reputation may be sold to the highest bidder. “You may compromise your ability to be trusted in future work or presentations. I’ve regretted some things I said many years ago, not because I was being dishonest but because I really wasn’t as skeptical as I should have been about the types of results I was getting. You do tend to get on a bandwagon; you want everything to be positive,” he said, adding: “The other thing that can happen is, if things don’t work out with other buyers, they’re going to say, ‘I can’t get the same results.’ If somebody can’t replicate what you’re doing, it’s going to put your reputation on the line to some degree. So, you have to be very careful.”
Before agreeing to evaluate a new technology as an investigator or in your own practice, Dr. Ross recommended asking yourself if the intervention makes sense on a gross or microanatomic level. “There should be a physical basis for how it works, and ideally there should be some histology that backs it up,” he said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “Where is the data to support the outcomes? If it is your own data, how skeptical have you been in its acquisition and assessment?”
When evaluating a new technology, Dr. Ross recommended starting with test spots and low settings. “It behooves you not to be too aggressive because there are some untoward things you may not see right away.” He advised evaluating short- and long-term outcomes and being wary of devices that heat very deeply and rely on long-term outcomes, such as hair removal, acne improvement, scar improvement, and skin tightening – all of which require long intervals for assessment. As one of his “Ross Rules” states: “The deeper the heating and the less focused the heating, the less we can expect results.” Another Ross Rule calls for being skeptical about technologies without an immediate finding that can be “seen” on routine histology. “To me, the deeper the procedure, particularly if it’s not fractional, the confidence of my outcome is diminished,” he said. “The exception is any intervention that relies on selective photothermolysis.”
Using new technologies in practice
Dr. Ross also offered tips on how to properly incorporate newly approved technologies into your practice safely, including the use of visual endpoints. “That’s tough for technologies like laser liposuction or fractional technologies, where we rely more on ‘guidelines’ than endpoints,” he said. In addition, he recommended gradually increasing settings and using test areas to stall and/or hone techniques. “It’s exciting, but you’re like a test pilot. You want to be careful that you are doing things that are not likely to risk the patient. Try some off-the-face applications first. When you’re using a new technology, push a little harder with each patient so you can find a safe zone for that technology. You don’t have to get it all in one treatment session. Be conservative. Anticipate that you may be underassessing the immediate response.”
Above all, be careful. “Use your judgment more than laser company-prescribed settings,” he said. “Most companies have the go-by settings on the low side for patient protection, but sometimes efficacy suffers. Use cautiously on friends and family. If you treat a spouse or a friend and things don’t go perfectly, that’s always a recipe for a problem.”
Dr. Ross reported having received financial grants and research grants from Candela, Cutera, Lumenis, and Lutronic; consulting fees from Palomar; and honoraria from Cynosure, Cutera, and Lumenis. He has also received research funding from Venous Concepts, Pulsed Biosciences, and Cynosure.
A healthy dose of skepticism is reasonable when evaluating new technologies to potentially use in your practice, but being overly critical can backfire, according to E. Victor Ross, MD.
During a virtual course on laser and aesthetic skin therapy, he noted that dermatologists may be evaluating new technologies in roles as an investigator or provider, or as a provider who buys the equipment outright, without any direct compensation from industry. “If you’re doing investigative work, you’re already in a conflicted situation because you’re trying to serve two masters,” said Dr. Ross, who directs the Scripps Clinic Laser and Cosmetic Dermatology Center in San Diego. “You’re trying to advance science and to make sure your reputation is intact and maybe even enhanced, but you’re also kind of at the whim of industry, because they have a goal. Sometimes the goals are similar. Your goal is to advance the technology and advance patient care, but they have a goal of selling equipment. Those goals should be compatible, and they should be in the same pathway; they should be parallel.”
Being too critical as an investigator/researcher of new technologies can hinder further interactions with industry. “Sometimes your criticism can be premature, and small changes in the technology and/or waiting for results can validate the technology,” he said. “Maybe it’s a skin-tightening technology, or maybe there’s something you don’t like about it; you have a prototype and you say: ‘This is not so great,’ but these are studies that take a long time to evaluate, like hair removal. Generally, if you’re a big critic, after a while, nobody wants to hear it. So, you can’t be overly critical. I think you can be skeptical, but not overly critical.”
On the other hand, Dr. Ross continued, if you cheerlead for the device industry, your reputation may be sold to the highest bidder. “You may compromise your ability to be trusted in future work or presentations. I’ve regretted some things I said many years ago, not because I was being dishonest but because I really wasn’t as skeptical as I should have been about the types of results I was getting. You do tend to get on a bandwagon; you want everything to be positive,” he said, adding: “The other thing that can happen is, if things don’t work out with other buyers, they’re going to say, ‘I can’t get the same results.’ If somebody can’t replicate what you’re doing, it’s going to put your reputation on the line to some degree. So, you have to be very careful.”
Before agreeing to evaluate a new technology as an investigator or in your own practice, Dr. Ross recommended asking yourself if the intervention makes sense on a gross or microanatomic level. “There should be a physical basis for how it works, and ideally there should be some histology that backs it up,” he said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “Where is the data to support the outcomes? If it is your own data, how skeptical have you been in its acquisition and assessment?”
When evaluating a new technology, Dr. Ross recommended starting with test spots and low settings. “It behooves you not to be too aggressive because there are some untoward things you may not see right away.” He advised evaluating short- and long-term outcomes and being wary of devices that heat very deeply and rely on long-term outcomes, such as hair removal, acne improvement, scar improvement, and skin tightening – all of which require long intervals for assessment. As one of his “Ross Rules” states: “The deeper the heating and the less focused the heating, the less we can expect results.” Another Ross Rule calls for being skeptical about technologies without an immediate finding that can be “seen” on routine histology. “To me, the deeper the procedure, particularly if it’s not fractional, the confidence of my outcome is diminished,” he said. “The exception is any intervention that relies on selective photothermolysis.”
Using new technologies in practice
Dr. Ross also offered tips on how to properly incorporate newly approved technologies into your practice safely, including the use of visual endpoints. “That’s tough for technologies like laser liposuction or fractional technologies, where we rely more on ‘guidelines’ than endpoints,” he said. In addition, he recommended gradually increasing settings and using test areas to stall and/or hone techniques. “It’s exciting, but you’re like a test pilot. You want to be careful that you are doing things that are not likely to risk the patient. Try some off-the-face applications first. When you’re using a new technology, push a little harder with each patient so you can find a safe zone for that technology. You don’t have to get it all in one treatment session. Be conservative. Anticipate that you may be underassessing the immediate response.”
Above all, be careful. “Use your judgment more than laser company-prescribed settings,” he said. “Most companies have the go-by settings on the low side for patient protection, but sometimes efficacy suffers. Use cautiously on friends and family. If you treat a spouse or a friend and things don’t go perfectly, that’s always a recipe for a problem.”
Dr. Ross reported having received financial grants and research grants from Candela, Cutera, Lumenis, and Lutronic; consulting fees from Palomar; and honoraria from Cynosure, Cutera, and Lumenis. He has also received research funding from Venous Concepts, Pulsed Biosciences, and Cynosure.
REPORTING FROM A LASER & AESTHETIC SKIN THERAPY COURSE
Efforts underway to eradicate racism in photomedicine
For one thing, melanin’s extinction overlaps with common laser lines, which affects the safety and efficacy of laser treatments in dermatology, but also in imaging and wearable devices that use LEDs in the visible range. “Pheomelanin and eumelanin are chemically very similar and both have this property of having very high extinction coefficients in the visible range, meaning that melanins both absorb and scatter light which we commonly use for laser treatments and for wearable medical devices,” Dr. Marks, a research scientist in dermatology at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “Melanins also shadow a number of other biological signals that we look for in the skin, such as those from hemoglobin.”
A number of different scales can be used to estimate the amount of eumelanin, or darkly pigmented melanin, in the skin, but the most famous is Fitzpatrick skin typing, the classification system that ranges from I to VI originally intended to quantify the skin’s response to UV light. “It’s so famous that it’s used in the emoji modifier of the Unicode Consortium lookup table,” said Dr. Marks, who spoke on behalf of the Wellman Anti-Racism Effort (WARE), a grassroots working group within the Wellman Center for Photomedicine at Massachusetts General Hospital. (The mission of the group is to eradicate racism in STEM, medicine, and academia starting with its own research and Center.)
Dr. Marks referred to a Northwestern University study published in 2013, which found that both patients and dermatologists failed to accurately determine Fitzpatrick skin type (FST) when compared with reflectance spectrophotometry used to measure melanin index objectively. “There is a need to classify skin type with reliable questions with responses suitable for all skin types,” the authors concluded.
Plenty more can go wrong when clinicians ignore or misunderstand the role of melanin as a background contrast agent, Dr. Marks continued. She cited the common misconception that melanomas do not occur in darker pigmented skin, a topic discussed in an article published online in January 2020 in Cancer Cytopathology.
“While they do occur at a lower rate, this misconception leads to an alarmingly low survival rate for black melanoma patients,” Dr. Marks said. “Acral lentiginous melanoma is one example of this. It is not related to sun exposure, yet it occurs in 30% to 70% of melanomas in black patients. This also exposes a mortality rate of 1 in 3 for Black melanoma patients, compared with 1 in 11 for White patients. In fact, Black patients face a lower survival for most cancers, often attributed to social and economic disparities rather than biological differences.”
Another significant contributing factor may be the lack of data and awareness of clinical research related to patients with skin of color. The Skin of Color Society’s “Find a Doctor” database is attempting to address this by improving patients’ access to board-certified dermatologists who specialize in skin of color. “Some of the discrepancies in dermatology education, screening, and treatment for Black, indigenous, and people of color is likely attributed to the fact that only 4.5% of images in general medical textbooks show darker skin, as they are only 5% of clinical trial participants despite making up 17% of the U.S. population,” Dr. Marks said at the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. Mind The Gap, a handbook of clinical signs and symptoms in black and brown skin, was published in 2020 by students and staff at St. George’s University of London. It can be downloaded for free.
Some 40 years after Kodak was criticized for not acknowledging inherent biases in their film stocks based on its “Kodak Shirley” color correction card, Dr. Marks said that camera makers are still ignoring racial bias in their technologies. “This is likely a ‘garbage in, garbage out’ phenomenon,” she said. “Due to the lack of diverse images, these biases get ingrained into machine learning models themselves, either because patients were not served in the first place, resulting in missing data, or because of mislabeling due to a lack of knowledge in properly classifying these images. So, while machine learning has the potential to step in where dermatologists fall short, we must be very diligent about recognizing any bias we are ingraining into these algorithms,” she said.
“That said, no technology is ‘born racist,’ of course; it is up to us to prevent history from repeating itself and prevent these biases from being ingrained in our work,” she added. “We can start by holding ourselves and others accountable when designing studies that have exclusion criteria, by challenging our sponsors on the exclusion of Fitzpatrick V and VI if you feel it is not scientifically sound, and by ensuring inclusive algorithm development. If these things are not possible, please use a disclaimer to make these limitations clear.”
According to Dr. Marks and WARE, clinicians can increase diversity in clinical trials by widening eligibility criteria, tapping into community-based medical centers, connecting with patient advocacy groups, using point-of-care and telemedicine technologies, supporting diversity-focused public policy on a larger scale, and making diversity an internal mandate, “within your institution, and within yourselves.”
Some community efforts stemming from Wellman inventions so far include the Texas-based Removery INK-nitiative program, which removes racist and hateful tattoos for free via laser tattoo removal technology that was invented at Wellman. Dr. Marks and her WARE colleagues also work with the Dream Beam Foundation, which is a global initiative bringing laser-based technologies to children in Vietnam, Armenia, Israel, Brazil, and Lebanon.
Dr. Marks reported having no financial disclosures.
For one thing, melanin’s extinction overlaps with common laser lines, which affects the safety and efficacy of laser treatments in dermatology, but also in imaging and wearable devices that use LEDs in the visible range. “Pheomelanin and eumelanin are chemically very similar and both have this property of having very high extinction coefficients in the visible range, meaning that melanins both absorb and scatter light which we commonly use for laser treatments and for wearable medical devices,” Dr. Marks, a research scientist in dermatology at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “Melanins also shadow a number of other biological signals that we look for in the skin, such as those from hemoglobin.”
A number of different scales can be used to estimate the amount of eumelanin, or darkly pigmented melanin, in the skin, but the most famous is Fitzpatrick skin typing, the classification system that ranges from I to VI originally intended to quantify the skin’s response to UV light. “It’s so famous that it’s used in the emoji modifier of the Unicode Consortium lookup table,” said Dr. Marks, who spoke on behalf of the Wellman Anti-Racism Effort (WARE), a grassroots working group within the Wellman Center for Photomedicine at Massachusetts General Hospital. (The mission of the group is to eradicate racism in STEM, medicine, and academia starting with its own research and Center.)
Dr. Marks referred to a Northwestern University study published in 2013, which found that both patients and dermatologists failed to accurately determine Fitzpatrick skin type (FST) when compared with reflectance spectrophotometry used to measure melanin index objectively. “There is a need to classify skin type with reliable questions with responses suitable for all skin types,” the authors concluded.
Plenty more can go wrong when clinicians ignore or misunderstand the role of melanin as a background contrast agent, Dr. Marks continued. She cited the common misconception that melanomas do not occur in darker pigmented skin, a topic discussed in an article published online in January 2020 in Cancer Cytopathology.
“While they do occur at a lower rate, this misconception leads to an alarmingly low survival rate for black melanoma patients,” Dr. Marks said. “Acral lentiginous melanoma is one example of this. It is not related to sun exposure, yet it occurs in 30% to 70% of melanomas in black patients. This also exposes a mortality rate of 1 in 3 for Black melanoma patients, compared with 1 in 11 for White patients. In fact, Black patients face a lower survival for most cancers, often attributed to social and economic disparities rather than biological differences.”
Another significant contributing factor may be the lack of data and awareness of clinical research related to patients with skin of color. The Skin of Color Society’s “Find a Doctor” database is attempting to address this by improving patients’ access to board-certified dermatologists who specialize in skin of color. “Some of the discrepancies in dermatology education, screening, and treatment for Black, indigenous, and people of color is likely attributed to the fact that only 4.5% of images in general medical textbooks show darker skin, as they are only 5% of clinical trial participants despite making up 17% of the U.S. population,” Dr. Marks said at the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. Mind The Gap, a handbook of clinical signs and symptoms in black and brown skin, was published in 2020 by students and staff at St. George’s University of London. It can be downloaded for free.
Some 40 years after Kodak was criticized for not acknowledging inherent biases in their film stocks based on its “Kodak Shirley” color correction card, Dr. Marks said that camera makers are still ignoring racial bias in their technologies. “This is likely a ‘garbage in, garbage out’ phenomenon,” she said. “Due to the lack of diverse images, these biases get ingrained into machine learning models themselves, either because patients were not served in the first place, resulting in missing data, or because of mislabeling due to a lack of knowledge in properly classifying these images. So, while machine learning has the potential to step in where dermatologists fall short, we must be very diligent about recognizing any bias we are ingraining into these algorithms,” she said.
“That said, no technology is ‘born racist,’ of course; it is up to us to prevent history from repeating itself and prevent these biases from being ingrained in our work,” she added. “We can start by holding ourselves and others accountable when designing studies that have exclusion criteria, by challenging our sponsors on the exclusion of Fitzpatrick V and VI if you feel it is not scientifically sound, and by ensuring inclusive algorithm development. If these things are not possible, please use a disclaimer to make these limitations clear.”
According to Dr. Marks and WARE, clinicians can increase diversity in clinical trials by widening eligibility criteria, tapping into community-based medical centers, connecting with patient advocacy groups, using point-of-care and telemedicine technologies, supporting diversity-focused public policy on a larger scale, and making diversity an internal mandate, “within your institution, and within yourselves.”
Some community efforts stemming from Wellman inventions so far include the Texas-based Removery INK-nitiative program, which removes racist and hateful tattoos for free via laser tattoo removal technology that was invented at Wellman. Dr. Marks and her WARE colleagues also work with the Dream Beam Foundation, which is a global initiative bringing laser-based technologies to children in Vietnam, Armenia, Israel, Brazil, and Lebanon.
Dr. Marks reported having no financial disclosures.
For one thing, melanin’s extinction overlaps with common laser lines, which affects the safety and efficacy of laser treatments in dermatology, but also in imaging and wearable devices that use LEDs in the visible range. “Pheomelanin and eumelanin are chemically very similar and both have this property of having very high extinction coefficients in the visible range, meaning that melanins both absorb and scatter light which we commonly use for laser treatments and for wearable medical devices,” Dr. Marks, a research scientist in dermatology at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “Melanins also shadow a number of other biological signals that we look for in the skin, such as those from hemoglobin.”
A number of different scales can be used to estimate the amount of eumelanin, or darkly pigmented melanin, in the skin, but the most famous is Fitzpatrick skin typing, the classification system that ranges from I to VI originally intended to quantify the skin’s response to UV light. “It’s so famous that it’s used in the emoji modifier of the Unicode Consortium lookup table,” said Dr. Marks, who spoke on behalf of the Wellman Anti-Racism Effort (WARE), a grassroots working group within the Wellman Center for Photomedicine at Massachusetts General Hospital. (The mission of the group is to eradicate racism in STEM, medicine, and academia starting with its own research and Center.)
Dr. Marks referred to a Northwestern University study published in 2013, which found that both patients and dermatologists failed to accurately determine Fitzpatrick skin type (FST) when compared with reflectance spectrophotometry used to measure melanin index objectively. “There is a need to classify skin type with reliable questions with responses suitable for all skin types,” the authors concluded.
Plenty more can go wrong when clinicians ignore or misunderstand the role of melanin as a background contrast agent, Dr. Marks continued. She cited the common misconception that melanomas do not occur in darker pigmented skin, a topic discussed in an article published online in January 2020 in Cancer Cytopathology.
“While they do occur at a lower rate, this misconception leads to an alarmingly low survival rate for black melanoma patients,” Dr. Marks said. “Acral lentiginous melanoma is one example of this. It is not related to sun exposure, yet it occurs in 30% to 70% of melanomas in black patients. This also exposes a mortality rate of 1 in 3 for Black melanoma patients, compared with 1 in 11 for White patients. In fact, Black patients face a lower survival for most cancers, often attributed to social and economic disparities rather than biological differences.”
Another significant contributing factor may be the lack of data and awareness of clinical research related to patients with skin of color. The Skin of Color Society’s “Find a Doctor” database is attempting to address this by improving patients’ access to board-certified dermatologists who specialize in skin of color. “Some of the discrepancies in dermatology education, screening, and treatment for Black, indigenous, and people of color is likely attributed to the fact that only 4.5% of images in general medical textbooks show darker skin, as they are only 5% of clinical trial participants despite making up 17% of the U.S. population,” Dr. Marks said at the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. Mind The Gap, a handbook of clinical signs and symptoms in black and brown skin, was published in 2020 by students and staff at St. George’s University of London. It can be downloaded for free.
Some 40 years after Kodak was criticized for not acknowledging inherent biases in their film stocks based on its “Kodak Shirley” color correction card, Dr. Marks said that camera makers are still ignoring racial bias in their technologies. “This is likely a ‘garbage in, garbage out’ phenomenon,” she said. “Due to the lack of diverse images, these biases get ingrained into machine learning models themselves, either because patients were not served in the first place, resulting in missing data, or because of mislabeling due to a lack of knowledge in properly classifying these images. So, while machine learning has the potential to step in where dermatologists fall short, we must be very diligent about recognizing any bias we are ingraining into these algorithms,” she said.
“That said, no technology is ‘born racist,’ of course; it is up to us to prevent history from repeating itself and prevent these biases from being ingrained in our work,” she added. “We can start by holding ourselves and others accountable when designing studies that have exclusion criteria, by challenging our sponsors on the exclusion of Fitzpatrick V and VI if you feel it is not scientifically sound, and by ensuring inclusive algorithm development. If these things are not possible, please use a disclaimer to make these limitations clear.”
According to Dr. Marks and WARE, clinicians can increase diversity in clinical trials by widening eligibility criteria, tapping into community-based medical centers, connecting with patient advocacy groups, using point-of-care and telemedicine technologies, supporting diversity-focused public policy on a larger scale, and making diversity an internal mandate, “within your institution, and within yourselves.”
Some community efforts stemming from Wellman inventions so far include the Texas-based Removery INK-nitiative program, which removes racist and hateful tattoos for free via laser tattoo removal technology that was invented at Wellman. Dr. Marks and her WARE colleagues also work with the Dream Beam Foundation, which is a global initiative bringing laser-based technologies to children in Vietnam, Armenia, Israel, Brazil, and Lebanon.
Dr. Marks reported having no financial disclosures.
EXPERT ANALYSIS FROM A LASER & AESTHETIC SKIN THERAPY COURSE
Role of lasers and light sources in medicine continue to expand
suggests R. Rox Anderson, MD.
“I’ve been doing this in my practice for a number of years and it’s quite gratifying,” Dr. Anderson, a dermatologist who directs the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “You treat the periorbital skin, mostly under the eye, just as if you were treating telangiectasia rosacea. The meibomian glands under the upper eyelid that cause this disease are sebaceous glands, and most of the people with dry eye have rosacea.”
In a retrospective noncomparative, interventional case series, 78 patients with severe dry eye syndrome were treated with intense pulsed-light therapy and gland expression at a single outpatient clinic over 30 months. Physician-judged improvement in dry eye tear breakup time was found for 87% of patients with an average of seven treatment visits and four maintenance visits, while 93% of patients reported posttreatment satisfaction with the degree of dry eye syndrome symptoms. More information about the approach were published in Investigative Ophthalmology & Visual Science and Current Opinion in Ophthalmology.
“What’s gratifying here is that most patients will get about 2 months of relief after a single treatment,” Dr. Anderson said. “They are very happy – some of the happiest patients in my practice. Many ophthalmologists don’t have the technology, so I think you can do this depending on your local referral system.”
Light-based approaches are also making promising inroads in cancer treatment. A recent study led by Martin Purschke, PhD, at the Wellman Center evaluated the use of a novel radio-phototherapy approach for killing cancer cells. The center of solid tissue tumors that are treated with radiotherapy is hypoxic, Dr. Anderson explained, “and oxygen is typically located around the perimeter of the tumor. After a radiation therapy treatment, you kill only the outer portion of it, and then the remaining cells grow back, and you end up with the same tumor. This is why you have to do radiation therapy over and over again. In contrast, if you add scintillating nanoparticles, which are particles with a very high C number atoms in them that pick up the x-ray photon and then emit many UV photons from one x-ray photon, they are very efficient at converting x-ray energy to UV energy.” The x-ray, he added, “generates UV light, and the UV light kills the tumor. We’re hoping that we can make a dent in radiotherapy this way.”
Dr. Anderson predicted that fiber lasers, which are highly advanced for industrial applications, will play an increasing role in dermatology and in other areas of medicine. “There are not a new kid on the block anymore but fiber lasers are relatively new to medicine,” he said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “We are seeing incredible capabilities with fiber lasers: essentially any wavelength, any power, any pulse duration you want. The lasers are efficient, small, rugged, and their lifetime exceeds your lifetime. They are likely to displace many of our old lasers in dermatology. I don’t know when, but I know it will happen.”
He reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
suggests R. Rox Anderson, MD.
“I’ve been doing this in my practice for a number of years and it’s quite gratifying,” Dr. Anderson, a dermatologist who directs the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “You treat the periorbital skin, mostly under the eye, just as if you were treating telangiectasia rosacea. The meibomian glands under the upper eyelid that cause this disease are sebaceous glands, and most of the people with dry eye have rosacea.”
In a retrospective noncomparative, interventional case series, 78 patients with severe dry eye syndrome were treated with intense pulsed-light therapy and gland expression at a single outpatient clinic over 30 months. Physician-judged improvement in dry eye tear breakup time was found for 87% of patients with an average of seven treatment visits and four maintenance visits, while 93% of patients reported posttreatment satisfaction with the degree of dry eye syndrome symptoms. More information about the approach were published in Investigative Ophthalmology & Visual Science and Current Opinion in Ophthalmology.
“What’s gratifying here is that most patients will get about 2 months of relief after a single treatment,” Dr. Anderson said. “They are very happy – some of the happiest patients in my practice. Many ophthalmologists don’t have the technology, so I think you can do this depending on your local referral system.”
Light-based approaches are also making promising inroads in cancer treatment. A recent study led by Martin Purschke, PhD, at the Wellman Center evaluated the use of a novel radio-phototherapy approach for killing cancer cells. The center of solid tissue tumors that are treated with radiotherapy is hypoxic, Dr. Anderson explained, “and oxygen is typically located around the perimeter of the tumor. After a radiation therapy treatment, you kill only the outer portion of it, and then the remaining cells grow back, and you end up with the same tumor. This is why you have to do radiation therapy over and over again. In contrast, if you add scintillating nanoparticles, which are particles with a very high C number atoms in them that pick up the x-ray photon and then emit many UV photons from one x-ray photon, they are very efficient at converting x-ray energy to UV energy.” The x-ray, he added, “generates UV light, and the UV light kills the tumor. We’re hoping that we can make a dent in radiotherapy this way.”
Dr. Anderson predicted that fiber lasers, which are highly advanced for industrial applications, will play an increasing role in dermatology and in other areas of medicine. “There are not a new kid on the block anymore but fiber lasers are relatively new to medicine,” he said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “We are seeing incredible capabilities with fiber lasers: essentially any wavelength, any power, any pulse duration you want. The lasers are efficient, small, rugged, and their lifetime exceeds your lifetime. They are likely to displace many of our old lasers in dermatology. I don’t know when, but I know it will happen.”
He reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
suggests R. Rox Anderson, MD.
“I’ve been doing this in my practice for a number of years and it’s quite gratifying,” Dr. Anderson, a dermatologist who directs the Wellman Center for Photomedicine at Massachusetts General Hospital, Boston, said during a virtual course on laser and aesthetic skin therapy. “You treat the periorbital skin, mostly under the eye, just as if you were treating telangiectasia rosacea. The meibomian glands under the upper eyelid that cause this disease are sebaceous glands, and most of the people with dry eye have rosacea.”
In a retrospective noncomparative, interventional case series, 78 patients with severe dry eye syndrome were treated with intense pulsed-light therapy and gland expression at a single outpatient clinic over 30 months. Physician-judged improvement in dry eye tear breakup time was found for 87% of patients with an average of seven treatment visits and four maintenance visits, while 93% of patients reported posttreatment satisfaction with the degree of dry eye syndrome symptoms. More information about the approach were published in Investigative Ophthalmology & Visual Science and Current Opinion in Ophthalmology.
“What’s gratifying here is that most patients will get about 2 months of relief after a single treatment,” Dr. Anderson said. “They are very happy – some of the happiest patients in my practice. Many ophthalmologists don’t have the technology, so I think you can do this depending on your local referral system.”
Light-based approaches are also making promising inroads in cancer treatment. A recent study led by Martin Purschke, PhD, at the Wellman Center evaluated the use of a novel radio-phototherapy approach for killing cancer cells. The center of solid tissue tumors that are treated with radiotherapy is hypoxic, Dr. Anderson explained, “and oxygen is typically located around the perimeter of the tumor. After a radiation therapy treatment, you kill only the outer portion of it, and then the remaining cells grow back, and you end up with the same tumor. This is why you have to do radiation therapy over and over again. In contrast, if you add scintillating nanoparticles, which are particles with a very high C number atoms in them that pick up the x-ray photon and then emit many UV photons from one x-ray photon, they are very efficient at converting x-ray energy to UV energy.” The x-ray, he added, “generates UV light, and the UV light kills the tumor. We’re hoping that we can make a dent in radiotherapy this way.”
Dr. Anderson predicted that fiber lasers, which are highly advanced for industrial applications, will play an increasing role in dermatology and in other areas of medicine. “There are not a new kid on the block anymore but fiber lasers are relatively new to medicine,” he said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “We are seeing incredible capabilities with fiber lasers: essentially any wavelength, any power, any pulse duration you want. The lasers are efficient, small, rugged, and their lifetime exceeds your lifetime. They are likely to displace many of our old lasers in dermatology. I don’t know when, but I know it will happen.”
He reported having received research funding and/or consulting fees from numerous device and pharmaceutical companies.
FROM A LASER & AESTHETIC SKIN THERAPY COURSE
Microneedling: What’s the truth?
according to Catherine M. DiGiorgio, MD, MS.
During a virtual course on laser and aesthetic skin therapy, Dr. DiGiorgio, a laser and cosmetic dermatologist at the Boston Center for Facial Rejuvenation, provided a state-of-the-art update on microneedling, a procedure in which microneedles are rolled over the skin to create epidermal and dermal microwounds.
“The depths are adjustable and it’s purely mechanical: no energy is being delivered with these treatments,” she said. “The hypothesized mechanism of action is that microneedling creates microwounds which initiate wound healing to stimulate new collagen production. This breaks apart compact collagen in the superficial dermis while stimulating new collagen and elastin,” she explained, adding that it is also hypothesized that this “stimulates growth factors that directly impact collagen and elastin synthesis.”
Conditions that have been reported to be treatable with microneedling in the medical literature include scars – especially acne scars – as well as rhytides, skin laxity, striae, melasma, and enlarged pores. Microneedling can also be used for transdermal drug delivery, although it’s far inferior to microinjection of medications. Contraindications are similar to those with laser surgery, including active infection of the area, history of keloids, inflammatory acne, and immunosuppression; and it should not be performed on the same day as neuromodulator treatment, to avoid diffusion of the neuromodulator. Herpes simplex virus prophylaxis is also indicated prior to microneedling treatment.
Many devices are available for use, including fixed, manual needle rollers and electric-powered pens with single-use sterile cartridges. The devices vary by needle length, quantity, diameter, configuration, and material of which the microneedles are made of. The needle length is not reliable for penetration depth, especially when greater than 1 mm. Treatment guidelines vary based on the area being treated.
“You put tension on the skin and apply the device perpendicularly,” Dr. DiGiorgio said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “It should be performed in quadrants, and I prefer to treat in cosmetic units. The endpoint is pinpoint bleeding versus deep purpura. Ice water–soaked sterile gauze can be applied after treatment and skin care can be resumed in 5-7 days.”
In an effort to compare the efficacy and safety of the 2940-nm Er:YAG laser and microneedling for the treatment of atrophic acne scars, researchers in Egypt performed a randomized, split-face study in 30 patients. Study participants were evaluated by two blinded physicians at baseline and at 3 months follow-up. Both modalities showed a significant improvement in acne scars, but those treated with the Er:YAG laser showed a statistically significant greater improvement (70% vs. 30%, respectively; P < .001). Histology revealed a significantly higher increase in the mean quantity of collagen fibers in the Er:YAG-treated patients, compared with those who underwent microneedling, but patients in the microneedling group experienced less erythema and edema. Pain scores were significantly higher in the microneedling group compared with the Er:YAG group.
In a more recent study, researchers performed a systematic review of 37 articles in the medical literature related to microneedling. They found that the procedure provides good results when used on its own, and is preferred by patients because of its minimal downtime and side effects. However, they concluded that, while microneedling is a safe and effective option, methodological shortcomings and further research is required to establish it as an evidence-based therapeutic option.
“There are a limited number of high-quality studies demonstrating the efficacy of microneedling,” Dr. DiGiorgio said. “It is a safe procedure, which could complement laser treatments, so you could perform it between expensive and high-downtime lasers. It is an option for patients who seek measurable results with little to no downtime, and it’s also an option for clinicians who do not use laser-resurfacing devices. Basically, further research is needed to establish microneedling as an evidence-based therapeutic option. Laser continues to remain the gold standard for treatment.”
Another treatment option is fractional microneedling with radiofrequency (RF). These are microneedles which deliver energy in the form of RF at the tip of the needle, which denatures collagen and creates thermal coagulative injury zones at temperatures greater than 65° C. The microneedles can be insulated or noninsulated. “Insulated tips are safer for darker skin types because the epidermis is protected from the heat damage,” Dr. DiGiorgio said.
These treatments are used for the improvement of rhytides and scars and for skin tightening. “The treatments are painful and require topical anesthesia,” she said. “Erythema can range from about 24 hours to 4 days depending on the device being used. Usually monthly treatments are recommended.”
A study by investigators in South Korea and China set out to analyze histometric changes of this approach in pigs. They treated the pigs with a fractional microneedle delivery system at various depths, conduction times, and energies, and performed punch biopsies immediately after treatment, 4 days post treatment, and at 2 weeks post treatment. They noted that depth and conduction time affected the height, width, and volume of the columns of coagulation, but that the energy only affected the level of tissue destruction. “They also noted that RF-induced coagulated columns had a mixed cellular infiltrate, neovascularization, granular tissue formation with fibroblasts, and neocollagenesis and elastogenesis in the dermis,” Dr. DiGiorgio said.
In another study, researchers in Thailand performed a study in two women who were going to undergo abdominoplasty. Participants received six treatments prior to abdominoplasty with biopsies at different time intervals following microneedling with radiofrequency. The researchers tested five energy levels and five test areas; no collagen denaturization was observed with microneedling alone.
“This supports the idea that heat is required to stimulate neocollagenesis, and needles alone do not denature collagen,” Dr. DiGiorgio said. “They also found that neocollagenesis and neoelastogenesis occurred at optimal heating levels.”
In a separate study, researchers from Denmark used a number of different imaging modalities to evaluate the impact of microneedle fractional RF-induced micropores. When they used reflectance confocal microscopy, they observed that the micropores showed a concentric shape. “They contained hyper-reflective granules, and the coagulated tissue was seen from the epidermis to the dermal-epidermal junction,” Dr. DiGiorgio said. “This was not seen in the low energy microneedle RF. On optical coherence tomography, they noted that high-energy needle RF showed deeper, more easily identifiable micropores versus low-energy microneedle RF.” On histology the researchers noted that tissue coagulation reached a depth of 1,500 mcm with high-energy microneedle RF, but low-energy microneedle RF only showed visible damage to the epidermis. “This also supports the idea that microneedles alone without energy do not reach the deeper layers of the dermis,” she said.
Dr. DiGiorgio concluded her presentation by discussing promising results from a split-face study of fractional microneedling RF for the treatment of rosacea. For the 12-week randomized study, researchers from South Korea performed two sessions 4 weeks apart, with no treatment to the control side. Erythema decreased 13.6% and results were maintained for about 2 months after treatment. The researchers also measured inflammatory markers and noticed decreased dermal inflammation and mast cell counts and decreased markers related to angiogenesis, inflammation, innate immunity, and neuronal cation channels. “This could be a promising treatment for inflammatory rosacea in the future,” Dr. DiGiorgio said.
She disclosed that she is a consultant for Allergan Aesthetics.
according to Catherine M. DiGiorgio, MD, MS.
During a virtual course on laser and aesthetic skin therapy, Dr. DiGiorgio, a laser and cosmetic dermatologist at the Boston Center for Facial Rejuvenation, provided a state-of-the-art update on microneedling, a procedure in which microneedles are rolled over the skin to create epidermal and dermal microwounds.
“The depths are adjustable and it’s purely mechanical: no energy is being delivered with these treatments,” she said. “The hypothesized mechanism of action is that microneedling creates microwounds which initiate wound healing to stimulate new collagen production. This breaks apart compact collagen in the superficial dermis while stimulating new collagen and elastin,” she explained, adding that it is also hypothesized that this “stimulates growth factors that directly impact collagen and elastin synthesis.”
Conditions that have been reported to be treatable with microneedling in the medical literature include scars – especially acne scars – as well as rhytides, skin laxity, striae, melasma, and enlarged pores. Microneedling can also be used for transdermal drug delivery, although it’s far inferior to microinjection of medications. Contraindications are similar to those with laser surgery, including active infection of the area, history of keloids, inflammatory acne, and immunosuppression; and it should not be performed on the same day as neuromodulator treatment, to avoid diffusion of the neuromodulator. Herpes simplex virus prophylaxis is also indicated prior to microneedling treatment.
Many devices are available for use, including fixed, manual needle rollers and electric-powered pens with single-use sterile cartridges. The devices vary by needle length, quantity, diameter, configuration, and material of which the microneedles are made of. The needle length is not reliable for penetration depth, especially when greater than 1 mm. Treatment guidelines vary based on the area being treated.
“You put tension on the skin and apply the device perpendicularly,” Dr. DiGiorgio said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “It should be performed in quadrants, and I prefer to treat in cosmetic units. The endpoint is pinpoint bleeding versus deep purpura. Ice water–soaked sterile gauze can be applied after treatment and skin care can be resumed in 5-7 days.”
In an effort to compare the efficacy and safety of the 2940-nm Er:YAG laser and microneedling for the treatment of atrophic acne scars, researchers in Egypt performed a randomized, split-face study in 30 patients. Study participants were evaluated by two blinded physicians at baseline and at 3 months follow-up. Both modalities showed a significant improvement in acne scars, but those treated with the Er:YAG laser showed a statistically significant greater improvement (70% vs. 30%, respectively; P < .001). Histology revealed a significantly higher increase in the mean quantity of collagen fibers in the Er:YAG-treated patients, compared with those who underwent microneedling, but patients in the microneedling group experienced less erythema and edema. Pain scores were significantly higher in the microneedling group compared with the Er:YAG group.
In a more recent study, researchers performed a systematic review of 37 articles in the medical literature related to microneedling. They found that the procedure provides good results when used on its own, and is preferred by patients because of its minimal downtime and side effects. However, they concluded that, while microneedling is a safe and effective option, methodological shortcomings and further research is required to establish it as an evidence-based therapeutic option.
“There are a limited number of high-quality studies demonstrating the efficacy of microneedling,” Dr. DiGiorgio said. “It is a safe procedure, which could complement laser treatments, so you could perform it between expensive and high-downtime lasers. It is an option for patients who seek measurable results with little to no downtime, and it’s also an option for clinicians who do not use laser-resurfacing devices. Basically, further research is needed to establish microneedling as an evidence-based therapeutic option. Laser continues to remain the gold standard for treatment.”
Another treatment option is fractional microneedling with radiofrequency (RF). These are microneedles which deliver energy in the form of RF at the tip of the needle, which denatures collagen and creates thermal coagulative injury zones at temperatures greater than 65° C. The microneedles can be insulated or noninsulated. “Insulated tips are safer for darker skin types because the epidermis is protected from the heat damage,” Dr. DiGiorgio said.
These treatments are used for the improvement of rhytides and scars and for skin tightening. “The treatments are painful and require topical anesthesia,” she said. “Erythema can range from about 24 hours to 4 days depending on the device being used. Usually monthly treatments are recommended.”
A study by investigators in South Korea and China set out to analyze histometric changes of this approach in pigs. They treated the pigs with a fractional microneedle delivery system at various depths, conduction times, and energies, and performed punch biopsies immediately after treatment, 4 days post treatment, and at 2 weeks post treatment. They noted that depth and conduction time affected the height, width, and volume of the columns of coagulation, but that the energy only affected the level of tissue destruction. “They also noted that RF-induced coagulated columns had a mixed cellular infiltrate, neovascularization, granular tissue formation with fibroblasts, and neocollagenesis and elastogenesis in the dermis,” Dr. DiGiorgio said.
In another study, researchers in Thailand performed a study in two women who were going to undergo abdominoplasty. Participants received six treatments prior to abdominoplasty with biopsies at different time intervals following microneedling with radiofrequency. The researchers tested five energy levels and five test areas; no collagen denaturization was observed with microneedling alone.
“This supports the idea that heat is required to stimulate neocollagenesis, and needles alone do not denature collagen,” Dr. DiGiorgio said. “They also found that neocollagenesis and neoelastogenesis occurred at optimal heating levels.”
In a separate study, researchers from Denmark used a number of different imaging modalities to evaluate the impact of microneedle fractional RF-induced micropores. When they used reflectance confocal microscopy, they observed that the micropores showed a concentric shape. “They contained hyper-reflective granules, and the coagulated tissue was seen from the epidermis to the dermal-epidermal junction,” Dr. DiGiorgio said. “This was not seen in the low energy microneedle RF. On optical coherence tomography, they noted that high-energy needle RF showed deeper, more easily identifiable micropores versus low-energy microneedle RF.” On histology the researchers noted that tissue coagulation reached a depth of 1,500 mcm with high-energy microneedle RF, but low-energy microneedle RF only showed visible damage to the epidermis. “This also supports the idea that microneedles alone without energy do not reach the deeper layers of the dermis,” she said.
Dr. DiGiorgio concluded her presentation by discussing promising results from a split-face study of fractional microneedling RF for the treatment of rosacea. For the 12-week randomized study, researchers from South Korea performed two sessions 4 weeks apart, with no treatment to the control side. Erythema decreased 13.6% and results were maintained for about 2 months after treatment. The researchers also measured inflammatory markers and noticed decreased dermal inflammation and mast cell counts and decreased markers related to angiogenesis, inflammation, innate immunity, and neuronal cation channels. “This could be a promising treatment for inflammatory rosacea in the future,” Dr. DiGiorgio said.
She disclosed that she is a consultant for Allergan Aesthetics.
according to Catherine M. DiGiorgio, MD, MS.
During a virtual course on laser and aesthetic skin therapy, Dr. DiGiorgio, a laser and cosmetic dermatologist at the Boston Center for Facial Rejuvenation, provided a state-of-the-art update on microneedling, a procedure in which microneedles are rolled over the skin to create epidermal and dermal microwounds.
“The depths are adjustable and it’s purely mechanical: no energy is being delivered with these treatments,” she said. “The hypothesized mechanism of action is that microneedling creates microwounds which initiate wound healing to stimulate new collagen production. This breaks apart compact collagen in the superficial dermis while stimulating new collagen and elastin,” she explained, adding that it is also hypothesized that this “stimulates growth factors that directly impact collagen and elastin synthesis.”
Conditions that have been reported to be treatable with microneedling in the medical literature include scars – especially acne scars – as well as rhytides, skin laxity, striae, melasma, and enlarged pores. Microneedling can also be used for transdermal drug delivery, although it’s far inferior to microinjection of medications. Contraindications are similar to those with laser surgery, including active infection of the area, history of keloids, inflammatory acne, and immunosuppression; and it should not be performed on the same day as neuromodulator treatment, to avoid diffusion of the neuromodulator. Herpes simplex virus prophylaxis is also indicated prior to microneedling treatment.
Many devices are available for use, including fixed, manual needle rollers and electric-powered pens with single-use sterile cartridges. The devices vary by needle length, quantity, diameter, configuration, and material of which the microneedles are made of. The needle length is not reliable for penetration depth, especially when greater than 1 mm. Treatment guidelines vary based on the area being treated.
“You put tension on the skin and apply the device perpendicularly,” Dr. DiGiorgio said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “It should be performed in quadrants, and I prefer to treat in cosmetic units. The endpoint is pinpoint bleeding versus deep purpura. Ice water–soaked sterile gauze can be applied after treatment and skin care can be resumed in 5-7 days.”
In an effort to compare the efficacy and safety of the 2940-nm Er:YAG laser and microneedling for the treatment of atrophic acne scars, researchers in Egypt performed a randomized, split-face study in 30 patients. Study participants were evaluated by two blinded physicians at baseline and at 3 months follow-up. Both modalities showed a significant improvement in acne scars, but those treated with the Er:YAG laser showed a statistically significant greater improvement (70% vs. 30%, respectively; P < .001). Histology revealed a significantly higher increase in the mean quantity of collagen fibers in the Er:YAG-treated patients, compared with those who underwent microneedling, but patients in the microneedling group experienced less erythema and edema. Pain scores were significantly higher in the microneedling group compared with the Er:YAG group.
In a more recent study, researchers performed a systematic review of 37 articles in the medical literature related to microneedling. They found that the procedure provides good results when used on its own, and is preferred by patients because of its minimal downtime and side effects. However, they concluded that, while microneedling is a safe and effective option, methodological shortcomings and further research is required to establish it as an evidence-based therapeutic option.
“There are a limited number of high-quality studies demonstrating the efficacy of microneedling,” Dr. DiGiorgio said. “It is a safe procedure, which could complement laser treatments, so you could perform it between expensive and high-downtime lasers. It is an option for patients who seek measurable results with little to no downtime, and it’s also an option for clinicians who do not use laser-resurfacing devices. Basically, further research is needed to establish microneedling as an evidence-based therapeutic option. Laser continues to remain the gold standard for treatment.”
Another treatment option is fractional microneedling with radiofrequency (RF). These are microneedles which deliver energy in the form of RF at the tip of the needle, which denatures collagen and creates thermal coagulative injury zones at temperatures greater than 65° C. The microneedles can be insulated or noninsulated. “Insulated tips are safer for darker skin types because the epidermis is protected from the heat damage,” Dr. DiGiorgio said.
These treatments are used for the improvement of rhytides and scars and for skin tightening. “The treatments are painful and require topical anesthesia,” she said. “Erythema can range from about 24 hours to 4 days depending on the device being used. Usually monthly treatments are recommended.”
A study by investigators in South Korea and China set out to analyze histometric changes of this approach in pigs. They treated the pigs with a fractional microneedle delivery system at various depths, conduction times, and energies, and performed punch biopsies immediately after treatment, 4 days post treatment, and at 2 weeks post treatment. They noted that depth and conduction time affected the height, width, and volume of the columns of coagulation, but that the energy only affected the level of tissue destruction. “They also noted that RF-induced coagulated columns had a mixed cellular infiltrate, neovascularization, granular tissue formation with fibroblasts, and neocollagenesis and elastogenesis in the dermis,” Dr. DiGiorgio said.
In another study, researchers in Thailand performed a study in two women who were going to undergo abdominoplasty. Participants received six treatments prior to abdominoplasty with biopsies at different time intervals following microneedling with radiofrequency. The researchers tested five energy levels and five test areas; no collagen denaturization was observed with microneedling alone.
“This supports the idea that heat is required to stimulate neocollagenesis, and needles alone do not denature collagen,” Dr. DiGiorgio said. “They also found that neocollagenesis and neoelastogenesis occurred at optimal heating levels.”
In a separate study, researchers from Denmark used a number of different imaging modalities to evaluate the impact of microneedle fractional RF-induced micropores. When they used reflectance confocal microscopy, they observed that the micropores showed a concentric shape. “They contained hyper-reflective granules, and the coagulated tissue was seen from the epidermis to the dermal-epidermal junction,” Dr. DiGiorgio said. “This was not seen in the low energy microneedle RF. On optical coherence tomography, they noted that high-energy needle RF showed deeper, more easily identifiable micropores versus low-energy microneedle RF.” On histology the researchers noted that tissue coagulation reached a depth of 1,500 mcm with high-energy microneedle RF, but low-energy microneedle RF only showed visible damage to the epidermis. “This also supports the idea that microneedles alone without energy do not reach the deeper layers of the dermis,” she said.
Dr. DiGiorgio concluded her presentation by discussing promising results from a split-face study of fractional microneedling RF for the treatment of rosacea. For the 12-week randomized study, researchers from South Korea performed two sessions 4 weeks apart, with no treatment to the control side. Erythema decreased 13.6% and results were maintained for about 2 months after treatment. The researchers also measured inflammatory markers and noticed decreased dermal inflammation and mast cell counts and decreased markers related to angiogenesis, inflammation, innate immunity, and neuronal cation channels. “This could be a promising treatment for inflammatory rosacea in the future,” Dr. DiGiorgio said.
She disclosed that she is a consultant for Allergan Aesthetics.
FROM A LASER & AESTHETIC SKIN THERAPY COURSE
The case for a new skin typing system
Even though the popular classification system added skin types V and VI in 1988 to the first iteration established in 1975, it was never intended for categorizing skin color, according to Karen C. Kagha, MD.
“This topic is going to become more relevant in our clinical practices, especially when you look at the current population trends in the U.S.,” Dr. Kagha, MD, a dermatologist and cosmetic and laser fellow in the department of dermatology at Massachusetts General Hospital and a research fellow at Wellman Center for Photomedicine, both in Boston, said during a virtual course on laser and aesthetic skin therapy. “Minority groups continue to increase. According to the U.S. Census Bureau, by the year 2050, we can expect that the majority of the population will be of non-European descent.”
The original intent of the Fitzpatrick Skin Typing (FST) system was to establish a minimal erythema dose, or likelihood to burn for patients receiving phototherapy, she continued. However, a recently published survey of 141 board-certified dermatologists and trainees found that 31% of respondents said that they used the Fitzpatrick Skin Typing System to describe the patient’s race or ethnicity, 47% used it to describe the patients’ constitutive skin color, and 22% used it in both scenarios.
“There also have been inconsistencies reported with the Fitzpatrick Skin Typing System,” Dr. Kagha said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “Some studies show that there are inconsistent correlations between self-reported Fitzpatrick Skin Type and burn risk, and between self-reported FST and physician-reported FST. This means that some patients self-identify differently from how their physicians identify them.” There have also been some inconsistent correlations between race and objective measures of pigmentation, and also between race and self-reported FST.
Several classification systems have surfaced to try to bridge some of these gaps, including the Fanous classification, the Roberts Skin Type Classification System, and the Lancer Ethnicity Scale. Some of these have focused more on expanding the racial and ethnic categories to help predict response to procedures, she said, while others have focused more on hyperpigmentation, photoaging, and risk of scarring. “Others have suggested having different color matching systems to expand on a number of color-matched hues with regard to hyperpigmentation or race,” Dr. Kagha added. “In spite of all these efforts, it seems that the FST system remains the most widely used classification system in dermatology. I think that’s likely because we haven’t established a new consensus on a different system to use.”
She went on to postulate that there is likely “an infinite number of skin colors that are also impacted by geographic and cultural factors. Perhaps we should restructure how we think about skin typing. We need to establish a new consensus on skin typing, one that respects the variability in skin color but also one that’s clear, concise, objective, practical, and can be universally accepted.”
Dr. Kagha concluded her remarks by encouraging dermatologists to become more comfortable with treating all skin types. “This is going to be in line with the current population trends in the U.S., and also in line with the patients that we serve. Finally, I think we as physicians are in a unique position. Our patients’ frustrations and unsolved mysteries can drive our passion and our patient-centered innovation. For me, a common theme and a common source of frustration that I’ve seen in patients with increased melanin in their skin is figuring out how to effectively remove or prevent unwanted marks or unwanted pigment without disturbing the baseline pigment.”
Dr. Kagha reported having no financial disclosures.
Even though the popular classification system added skin types V and VI in 1988 to the first iteration established in 1975, it was never intended for categorizing skin color, according to Karen C. Kagha, MD.
“This topic is going to become more relevant in our clinical practices, especially when you look at the current population trends in the U.S.,” Dr. Kagha, MD, a dermatologist and cosmetic and laser fellow in the department of dermatology at Massachusetts General Hospital and a research fellow at Wellman Center for Photomedicine, both in Boston, said during a virtual course on laser and aesthetic skin therapy. “Minority groups continue to increase. According to the U.S. Census Bureau, by the year 2050, we can expect that the majority of the population will be of non-European descent.”
The original intent of the Fitzpatrick Skin Typing (FST) system was to establish a minimal erythema dose, or likelihood to burn for patients receiving phototherapy, she continued. However, a recently published survey of 141 board-certified dermatologists and trainees found that 31% of respondents said that they used the Fitzpatrick Skin Typing System to describe the patient’s race or ethnicity, 47% used it to describe the patients’ constitutive skin color, and 22% used it in both scenarios.
“There also have been inconsistencies reported with the Fitzpatrick Skin Typing System,” Dr. Kagha said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “Some studies show that there are inconsistent correlations between self-reported Fitzpatrick Skin Type and burn risk, and between self-reported FST and physician-reported FST. This means that some patients self-identify differently from how their physicians identify them.” There have also been some inconsistent correlations between race and objective measures of pigmentation, and also between race and self-reported FST.
Several classification systems have surfaced to try to bridge some of these gaps, including the Fanous classification, the Roberts Skin Type Classification System, and the Lancer Ethnicity Scale. Some of these have focused more on expanding the racial and ethnic categories to help predict response to procedures, she said, while others have focused more on hyperpigmentation, photoaging, and risk of scarring. “Others have suggested having different color matching systems to expand on a number of color-matched hues with regard to hyperpigmentation or race,” Dr. Kagha added. “In spite of all these efforts, it seems that the FST system remains the most widely used classification system in dermatology. I think that’s likely because we haven’t established a new consensus on a different system to use.”
She went on to postulate that there is likely “an infinite number of skin colors that are also impacted by geographic and cultural factors. Perhaps we should restructure how we think about skin typing. We need to establish a new consensus on skin typing, one that respects the variability in skin color but also one that’s clear, concise, objective, practical, and can be universally accepted.”
Dr. Kagha concluded her remarks by encouraging dermatologists to become more comfortable with treating all skin types. “This is going to be in line with the current population trends in the U.S., and also in line with the patients that we serve. Finally, I think we as physicians are in a unique position. Our patients’ frustrations and unsolved mysteries can drive our passion and our patient-centered innovation. For me, a common theme and a common source of frustration that I’ve seen in patients with increased melanin in their skin is figuring out how to effectively remove or prevent unwanted marks or unwanted pigment without disturbing the baseline pigment.”
Dr. Kagha reported having no financial disclosures.
Even though the popular classification system added skin types V and VI in 1988 to the first iteration established in 1975, it was never intended for categorizing skin color, according to Karen C. Kagha, MD.
“This topic is going to become more relevant in our clinical practices, especially when you look at the current population trends in the U.S.,” Dr. Kagha, MD, a dermatologist and cosmetic and laser fellow in the department of dermatology at Massachusetts General Hospital and a research fellow at Wellman Center for Photomedicine, both in Boston, said during a virtual course on laser and aesthetic skin therapy. “Minority groups continue to increase. According to the U.S. Census Bureau, by the year 2050, we can expect that the majority of the population will be of non-European descent.”
The original intent of the Fitzpatrick Skin Typing (FST) system was to establish a minimal erythema dose, or likelihood to burn for patients receiving phototherapy, she continued. However, a recently published survey of 141 board-certified dermatologists and trainees found that 31% of respondents said that they used the Fitzpatrick Skin Typing System to describe the patient’s race or ethnicity, 47% used it to describe the patients’ constitutive skin color, and 22% used it in both scenarios.
“There also have been inconsistencies reported with the Fitzpatrick Skin Typing System,” Dr. Kagha said during the meeting, which was sponsored by Harvard Medical School, Massachusetts General Hospital, and the Wellman Center for Photomedicine. “Some studies show that there are inconsistent correlations between self-reported Fitzpatrick Skin Type and burn risk, and between self-reported FST and physician-reported FST. This means that some patients self-identify differently from how their physicians identify them.” There have also been some inconsistent correlations between race and objective measures of pigmentation, and also between race and self-reported FST.
Several classification systems have surfaced to try to bridge some of these gaps, including the Fanous classification, the Roberts Skin Type Classification System, and the Lancer Ethnicity Scale. Some of these have focused more on expanding the racial and ethnic categories to help predict response to procedures, she said, while others have focused more on hyperpigmentation, photoaging, and risk of scarring. “Others have suggested having different color matching systems to expand on a number of color-matched hues with regard to hyperpigmentation or race,” Dr. Kagha added. “In spite of all these efforts, it seems that the FST system remains the most widely used classification system in dermatology. I think that’s likely because we haven’t established a new consensus on a different system to use.”
She went on to postulate that there is likely “an infinite number of skin colors that are also impacted by geographic and cultural factors. Perhaps we should restructure how we think about skin typing. We need to establish a new consensus on skin typing, one that respects the variability in skin color but also one that’s clear, concise, objective, practical, and can be universally accepted.”
Dr. Kagha concluded her remarks by encouraging dermatologists to become more comfortable with treating all skin types. “This is going to be in line with the current population trends in the U.S., and also in line with the patients that we serve. Finally, I think we as physicians are in a unique position. Our patients’ frustrations and unsolved mysteries can drive our passion and our patient-centered innovation. For me, a common theme and a common source of frustration that I’ve seen in patients with increased melanin in their skin is figuring out how to effectively remove or prevent unwanted marks or unwanted pigment without disturbing the baseline pigment.”
Dr. Kagha reported having no financial disclosures.
FROM A LASER & AESTHETIC SKIN THERAPY COURSE