NEWPORT BEACH, CALIF. – If you inject fillers, Manhattan plastic surgeon Lawrence Bass, MD, recommends that you keep hyaluronidase handy.
It’s the go-to for intravascular injections and helpful for nodules and granulomas, the main filler worries, but some offices don’t stock it. “Complications are rare, but they can be devastating. You have to be prepared.”
Massage, aspiration, transdermal nitroglycerin, and other options might help when, for example, a patient’s lip turns purple after a nasolabial fold injection, but “really, it’s all about hyaluronidase,” whether the filler is hyaluronic acid or not. The enzyme digests hyaluronic acid – both the injected kind and what patients have naturally – and loosens and disperses other fillers.
A patient who says that the injection hurt more than usual is an indication that the vessel may have been injected, Dr. Bass said. In such cases, “you have to deal with it immediately,” and repeat dosing if skin color doesn’t improve within an hour, he noted. “If you manage patients correctly, you can usually settle it with little or no deformity.”
There are two hyaluronidase options in the United States: Vitrase, an ovine formulation, and Hylenex, a recombinant human formulation. It probably doesn’t matter which one is used, he said. Soft tissue vascular compromise generally requires 200 units, and retinal artery occlusion, 500 units or more. Restylane is the easiest filler to digest because it’s the least cross-linked; Juvederm is more difficult; and Belotero is the most difficult, Dr. Bass noted.
Nodules and granulomas from filler injections have a slower onset than vascular compromise. Infected nodules can appear months after injection, and granulomas – red or purplish hypersensitivity reactions with indistinct borders, often with all injection sites involved at once – can appear years afterwards, set off by the flu or some other inflammatory trigger, according to Miles Graivier, MD, a plastic surgeon in Roswell, Ga., who shared the podium with Dr. Bass at the meeting.
Dr. Miles Graivier
Dr. Graivier described his approach to granulomas as “very aggressive.” Patients with granulomas receive oral steroids plus intralesional triamcinolone/fluorouracil/lidocaine injections every 2 weeks or more frequently. Hyaluronidase is used to disperse the filler. Resistant patients also get oral allopurinol. Laser liquefaction can help with both granulomas and infected nodules, he added.
Retinal artery occlusion is probably the most feared filler complication. It’s most likely with glabellar or periorbital injections but possible with any facial injection. “It’s a real horror show when it happens. The bottom line is you must restore circulation within 60-90 minutes” with retrobulbar hyaluronidase injections “or patients will lose vision permanently,” Dr. Bass said. People might not feel comfortable with retrobulbar injections, “but when the alternative is blindness, maybe you want to give them a try,” he added.
A 25 gauge, 1.5 inch needle is introduced to the lateral limbus at the orbital rim. “You pass the needle along the orbital floor to the equator of the globe,” – about 13-14 mm – “angle it up to enter the muscular conus, and inject 500 units or more.” Injecting at the orbital floor is less risky, but probably less effective, he said.
Hard nodules, meanwhile, present early after injection and are usually a result of too much filler or poor technique, Dr. Graivier said. For hard nodules, “hyaluronidase is the number one treatment,” although cracking, massage, and saline injection might help.
Infected nodules look like abscesses, but usually grow nothing on culture. Hyaluronidase is also first line for infected nodules, along with drainage and broad spectrum oral antibiotics for at least 6 weeks, and, if they don’t work, intravenous antibiotics, he added.
Dr. Bass is an investigator and speaker for Cynosure; an investigator for Endo Pharmaceuticals and Neothetics, and an advisor to Merz. Dr. Graivier is an advisor for Merz, and an investigator for Merz, Galderma, Evolus, Ideal Implants, Exilis, and Cynosure. The Graivier Center for Plastic Surgery is a training center for Cynosure.
The Summit in Aesthetic Medicine is held by Global Academy for Medical Education. Global Academy and this news organization are owned by the same company.