Acrylic Gonio-Subconjunctival Plates in Glaucoma Surgery

A clinical evaluation of a one‐piece drainage system in the treatment of canine glaucoma

“…Reopening the collapsed ciliary cleft and establishing uveoscleral drainage by cyclodialysis is of little or no value in the dog (Bedford 1977), and for the potentially sighted canine eye angle bypass surgery has been advocated as the therapy most likely to restore long term ocular normotension (Bedford 1977(Bedford , 1980. Failure of such techniques in both man and the dog is due to closure of the sclerostomy or loss of drainage from the subconjunctival scar sac, and in man several implant systems have been used in attempts to ensure aqueous outflow from the anterior chamber and effect its long term absorption by the subconjunctival tissues (Quadeer 1954, Molteno 1969, 1981 Krupin and others 1976Krupin and others , 1980Krupin and others , 1983 Molteno and others 1976, others 1982, 1985, Brown and Cairns 1983, Sarkies and Hitchings 1985). Such implants consist of an anterior chamber tube to conduct aqueous across the limbus, and various subconjunctival attachments have been used to help the formation and maintenance of a drainage scar.…”

Use of a one‐piece drainage system in the treatment of a closed angle glaucoma in a dog

“…Similarly the failure of standard drainage techniques in man is usually caused by fibrosis around the sclerostomy site or a decrease in absorptive surface within the multicystic scar produced. Various implant systems have been tried in attempts to conduct aqueous from the anterior chamber and maintain long term aqueous absorption by the subconjunctival tissues (Quadeer, 1954;Molteno, 1969Molteno, , 1981Krupin and others, 1976Krupin and others, , 1980Krupin and others, , 1983Molteno and.others, 1976;others, 1982, 1985;Brown and Cairns, 1983;Sarkies and Hitchings, 1985). Joseph and others (1986) considered that the creation of a large aqueous absorption scar sac is vital for extended control, and have reported the successful use of a one-piece valved drainage system to achieve normotension in 19 patients over a nine-month period.…”