Original ArticlesPrevention of Early Postoperative Hypotony by Partial Ligation of Silicone Tube in Ahmed Glaucoma Valve ImplantationKee, Changwon MDAuthor Information Department of Ophthalmology, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Seoul, Korea Received January 28, 2001; accepted June 26, 2001. Address correspondence and reprint requests to Changwon Kee, MD, Department of Ophthalmology, Samsung Medical Center, School of Medicine Sungkyunkwan University, Seoul 135–710, Korea. Journal of Glaucoma: December 2001 - Volume 10 - Issue 6 - p 466-469 Buy Abstract Purpose To determine the effectiveness of the partial ligation of a silicone tube of Ahmed glaucoma valve implantation to prevent early postoperative hypotony. Patients and Methods Thirty-two Korean patients were divided into two groups. Ahmed glaucoma valve implantation was performed with or without partial ligation in 16 eyes. The incidence of complications and the success rate in each group were compared. Results In the partial-ligation group, 10 patients (62.5%) had successful intraocular pressure control (> 5 to < 22 mm Hg) without any additional antiglaucoma medications, whereas intraocular pressure in 12 patients (75.0%) was controlled with or without additional antiglaucoma medications. In the nonligation group, nine patients (56.3%) had successful intraocular pressure control without any additional medications, whereas intraocular pressure in 12 patients (75.0%) was controlled with or without additional antiglaucoma medications. Early postoperative hypotony occurred in 1 of 16 (6.3%) patients with partial ligation and 4 of 16 (25%) patients without ligation. Conclusion The partial ligation of a tube in Ahmed glaucoma valve implantation suggested a lower rate of hypotony and surgical complications. There was no significant difference in final success rate between the partial ligation and nonligation groups. © 2001 Lippincott Williams & Wilkins, Inc.