Effects of phacoemulsification versus combined phaco-trabeculectomy on drainage angle status in primary angle closure glaucoma (PACG).
Tham Clement C Y, Leung Dexter Y L, Kwong Yolanda Y Y, Li Felix C H, Lai Jimmy S M, Lam Dennis S C
AI Summary
This study found phacoemulsification alone opened the drainage angle and deepened the anterior chamber more effectively than combined phaco-trabeculectomy in PACG eyes, indicating better anatomical improvement.
Abstract
Purpose
To document anatomic effects of phacoemulsification versus combined phaco-trabeculectomy on drainage angle in primary angle closure glaucoma (PACG).
Methods
Indentation gonioscopy and ultrasound biomicroscopy were performed preoperatively, and then at 1 year after phacoemulsification alone or combined phaco-trabeculectomy in PACG patients.
Results
Seventy-two PACG eyes of 72 patients were included in this study. Thirty-eight eyes were randomized into receiving phacoemulsification alone, whereas 34 eyes had combined phaco-trabeculectomy. The mean extent of synechial angle closure was significantly reduced from 266.4 degrees to 198.9 degrees (P<0.001) by phacoemulsification alone, and from 266.0 degrees to 227.2 degrees (P=0.03) by combined surgery. The mean angle opening distance (AOD 500) measured by ultrasound biomicroscopy was significantly increased from 208.0 to 468.0 microm (P<0.001) by phacoemulsification, and from 214.6 to 344.4 microm (P<0.001) by combined surgery. The mean trabecular-ciliary process distance was significantly increased from 824.6 to 1043.6 microm (P<0.001) by phacoemulsification, and from 800.9 to 951.5 microm (P=0.01) by combined surgery. The mean anterior chamber depth was significantly increased from 1798.6 to 3528.4 microm (P<0.001) by phacoemulsification alone, and from 1781.6 to 3297.8 microm (P<0.001) by combined surgery. Phacoemulsification alone resulted in significantly greater postoperative angle opening distance 500 (P<0.001) and anterior chamber depth (P<0.001) than phaco-trabeculectomy.
Conclusions
Phacoemulsification alone resulted in greater opening of drainage angle and greater deepening of anterior chamber than combined phaco-trabeculectomy in PACG eyes.
Synopsis: Phacoemulsification alone resulted in greater opening of drainage angle and greater deepening of anterior chamber than combined phaco-trabeculectomy in PACG eyes.
MeSH Terms
Shields Classification
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