Ahmed glaucoma valve
A valved drainage device consisting of a plate and a silicone tube with a one-way valve mechanism, diverting aqueous humor from the anterior chamber to a subconjunctival reservoir.
How it is used
Used in refractory glaucoma, after failure of one or more previous filtering surgeries (trabeculectomy), when the prognosis of conventional filtering surgery is poor.
Clinical tip
Combination with 27G vitrectomy has been described in selected cases of refractory glaucoma.
Sources
This entry is part of the Instriq catalog, researched and written per specialty from real web research -- never generated or invented without verification -- and reviewed skeptically and independently before publication. How this catalog is written.