Surgically induced posterior vitreous detachment by tearing the premacular vitreous cortex.

摘要

Inducing a posterior vitreous detachment (PVD) is an important procedure in pars plana vitrectomy for treating vitreomacular diseases, such as idiopathic macular hole and diabetic macular edema. Various techniques for inducing a PVD have been described, including vitreous aspiration with a silicon-tipped needle, excision of the attached posterior hyaloid, and dissection of the Weiss ring using a pick. Recently, triamcinolone acetonide has been used to aid visualization of the vitreous and has been found to facilitate a PVD and vitreous removal during vitrectomy. The visible vitreous body can then be easily separated from the retina by suction in most cases. However, in younger patients with a strong attachment of the posterior vitreous to the retina, it is sometimes difficult to induce a PVD.