BALTIMORE — , a small study of the recently cleared device found.
The study enrolled 12 patients who were undergoing treatment for periorbital rhytides, or wrinkles, around the eyes. Seven of them received topical anesthetic cream 20 minutes before the procedure, while five were given ice packs to self-apply for 5 minutes beforehand. Patients received four treatment sessions with a month between sessions and were then evaluated up to 3 months after their last session. Study results were presented at the annual conference of the American Society for Laser Medicine and Surgery.
“Based on the approach that we had used, which was to keep the device parameters the same for those who received topical anesthetics and those who received ice, when we looked at the pain levels that the patients had relayed to us when we were doing the procedure, we found that both of them were almost exactly the same in terms of discomfort, a level of 3-4 out of 10, with 10 being the highest discomfort level,” lead investigator Jerome M. Garden, MD, said in an interview after the conference.
“In terms of patient satisfaction using a range of 0-5, again it was fairly equivalent” between the two groups, said Dr. Garden, professor of clinical dermatology and biomedical engineering at Northwestern University, Chicago. “And the overall satisfaction rate was high.”
Dr. Garden
Dr. Jerome M. Garden
The same device settings were used for all procedures: A pulse duration of 10 milliseconds and a protrusion depth of 400 micrometers. Double passes were applied using the standard device tip, with the smaller tip used in tighter areas, Dr. Garden said. Three patients were Fitzpatrick skin type (FST) I, six were FST II, and three were FST III.
Study Results
The results for the different anesthetic methods were almost identical. Those using ice reported a 0-10 average pain level of 3.95 ± 1.5, while those who received the topical anesthetic reported a pain level of 3.92 ± 1.5. In terms of self-graded improvement at 3-month follow-up, using a scale of 1-4, with 1 representing up to a 25% improvement and 4 a 75%-100% improvement, the patients using ice had a 2.6 ± 0.5 improvement and those using topical cream a 2.8 ± 0.5 improvement, Dr. Garden said during his presentation.
In terms of patient satisfaction, rated on a scale of 1-5, with 5 being very satisfied, the average grade was 3.9 ± 0.9, Dr. Garden added, with 70% rating ≥ 4.
“This is a relatively new device, which uses an approach to help texture changes in wrinkling on the skin in a different fashion than any of the other devices that are currently out there,” Dr. Garden told this news organization after the conference. “I wanted to understand more in depth the different parameters that may impact the outcome” with this device, he added.
The thermomechanical fractional injury device, originally cleared by the US Food and Drug Administration (FDA) in 2021, with a second-generation device cleared in June 2023, deposits heat into the skin, producing controlled thermal injury to promote collagen and elastin production. The device uses only heat, not a laser, which penetrates the skin. A heat sensation on the skin during the procedure can affect patients differently depending on their level of tolerance, Dr. Garden said during his presentation.