Overmolding the filler can also compress the filling into a foramen, leading to compression of a nerve that causes paresthesia. Loh KT, Chua JJ, Lee HM, Lim JT, Chuah G, Yim B, Puah BK (201) Prevention and treatment of vision loss related to facial filler injections. Park SW, Weos SJ, Park KH, Huth JW, Jung C, Kwon OK (201) Iatrogenic retinal artery occlusion caused by cosmetic facial filler injections. The FDA has asked manufacturers of facial fillers to update their labels to include additional warnings about the risk of accidental injection into blood vessels.
The key to injecting fillers is to inject the right filler at the right level to the right patient and also at the right time. Injecting facial fillers into blood vessels can cause blockages that restrict blood supply to tissues. There are seven danger zones for facial nerves that should be avoided when injecting fillers into the face. In different non-surgical facial procedures, fillers are used to inject into the skin layers of the dermis and middle dermis.
Physicians should also fully inform patients of the risks associated with the procedure, know the signs and symptoms of accidental injection of facial filler into blood vessels, and have a plan to treat patients if this occurs.
