title: Collagen plug occlusion of Molteno tube shunts.
abstract: We report five patients in whom collagen lacrimal plugs were used to temporarily occlude the lumen of Molteno shunts to prevent early postoperative hypotony. Only one eye, with a double plate, developed hypotony and a flat anterior chamber that required reformation. However, in three patients, the collagen plugs did not dissolve and had to be removed surgically to lower the intraocular pressure. Although the semipermeability of collagen is desirable, its unpredictable degradation renders it unsuitable for temporary occlusion of tube shunts. Other biodegradable materials may be more appropriate for this purpose.
authors.affiliation: Cullen Eye Institute, Baylor College of Medicine, Houston, Tex. 77030.
authors.forename: W
authors.initials: W
authors.lastname: Stewart
authors.forename: R M
authors.initials: RM
authors.lastname: Feldman
authors.forename: R L
authors.initials: RL
authors.lastname: Gross
mesh_terms: D000368:Aged; D003094:Collagen; D005901:Glaucoma / Q000601:surgery; D006801:Humans; D007429:Intraocular Pressure; D008297:Male; D008875:Middle Aged; D009779:Occlusive Dressings; D015814:Ocular Hypotension / Q000517:prevention & control; D011183:Postoperative Complications / Q000517:prevention & control; D019736:Prostheses and Implants; D012826:Silicone Elastomers
chemical_list: D012826:Silicone Elastomers; D003094:Collagen