PMID: 9547776Apr 21, 1998Paper

The "deroofing" of Schlemm's canal in patients with open-angle glaucoma through placement of a collagen drainage device

Ophthalmic Surgery and Lasers
N H WelshS L Ziémba

Abstract

A preliminary study was conducted to examine a new surgical approach for the management of patients with open-angle glaucoma in which Schlemm's canal is opened to restore drainage in a nonpenetrating fashion. The authors compared the results of the surgical procedure including the new glaucoma drainage device with the results of standard trabeculectomy. The authors performed a new type of surgical procedure on 58 consecutive patients with open-angle glaucoma. The procedure entails "deroofing" Schlemm's canal to facilitate the drainage of aqueous without penetrating the eye. This is done by exposing the canal after a partial-thickness sclerectomy and keratectomy along a 5-mm arc. After the canal was deroofed, a new type of collagen glaucoma drainage device was placed in the surgical site to maintain drainage postoperatively. Patient data, including intraocular pressure (IOP), complications, and the number of medications required to maintain adequate pressures, were analyzed for 1 year postoperatively. Within 1 to 2 months postoperatively, 80.9% of the patients achieved an IOP lower than 21 mm Hg. This improved to 88.9% at 3 to 6 months postoperatively and 87.5% at 6 to 12 months postoperatively. The only major complications were...Continue Reading

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