Philippine Journal of Ophthalmology 2018;43(2):51-59

Risk factors for conjunctival tube erosion in eyes implanted with Ahmed glaucoma valve in a private eye institution in the Philippines.

Jovell Ian M. PEREGRINO 1 ; Edgar U. LEUENBERGER 2 ; Ma. Imelda Y. VELOSO 2

Affiliations

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Keywords

Conjunctival Tube Erosion; Ahmed® Glaucoma Valve; Glaucoma Drainage Device; Autologous Scleral Flap

Country

Philippines

Language

English

Abstract

Objective:To identify the risk factors for conjunctival tube erosion (CTE) in eyes implanted with Ahmed® glaucoma valve (AGV) device

Method:This is a retrospective study conducted at a private eye institution. Medical records of patients who underwent AGV implantation surgery from January 2004 to December 2013 were reviewed. Eyes with at least 24 months of follow-up and complete records were included. Several variables from the pre-, intra-, and postoperative periods were collected. The primary outcome was development of CTE after AGV surgery. Univariable logistic regression and multivariable analysis were employed.

Results:Forty-six (46) eyes of 45 patients were included in the study. The mean follow-up was 50.2 months (range: 24-140 months). Eight (8) eyes developed CTE (17.4%). Univariable logistic regression analysis identified female gender (P =0.064), presence of diabetes (P =0.083), prior intraocular surgeries (P =0.09), and postoperative use of antiglaucoma medications (P =0.086) to be marginally significant risk factors for CTE. On multivariable analysis, only female gender (OR=15.4, P =0.033) and diabetes (OR=14.1, P =0.031) were found to be significantly associated with CTE.

Conclusion:Risk factors for CTE following AGV implantation include female gender and presence of diabetes.