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Abstract #5691 Published in IGR 2-1
The application of water drinking test on the evaluation of trabeculectomy patency
Chen CH; Lu DW; Chang CJ; Chiang CH; Chou PIJournal of Ocular Pharmacology and Therapeutics 2000; 16:37-42
The water drinking test (WDT) was once frequently used as a diagnostic tool for glaucoma, but not so often nowadays. In this study, the authors investigated the potential use of the WDT on the evaluation of trabeculectomy patency. Twenty age-matched volunteers and 36 glaucoma patients who were to receive trabeculectomy procedure, were enrolled in this study. The WDT was given to the volunteers once and to all glaucoma patients before undergoing trabeculectomy and at certain intervals after the procedure. The WDT was performed in a standard manner. The authors defined four parameters after performing the WDT: initial pressure (IP, intraocular pressure (IOP) level before the WDT); slope of ascending trend (SOAT, the slope between baseline IOP and the highest IOP level); peak pressure (PP, the highest IOP level during the WDT); and end pressure (EP, the IOP level after the WDT). It was found that the results of the WDT and trabeculectomy patency were strongly correlated. The four parameters in success and failure cases were significantly different at the last follow-up: IP: 15.2±3.6 versus 25.3±6.4, p < 0.01; SOAT: 0.9±0.3 versus 1.8±1.2, p < 0.01; PP: 19.2±6.4 versus 39.5±12.2, p < 0.01; EP: 15.5±4.8 versus 29.4±8.2, p < 0.01. Thus, it was observed in this study that WDT was not only easy and safe to perform, but also valuable in evaluating the patency of trabeculectomy.
Dr. C.H. Chen, Department of Ophthalmology Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
Classification:
6.13 Provocative tests (Part of: 6 Clinical examination methods)
12.8.1 Without tube implant (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
