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Abstract #70415 Published in IGR 18-2

Retinal oxygen saturation before and after glaucoma surgery

Nitta E; Hirooka K; Shimazaki T; Sato S; Ukegawa K; Nakano Y; Tsujikawa A
Acta Ophthalmologica 2017; 95: e350-e353

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PURPOSE: This study compared retinal vessel oxygen saturation before and after glaucoma surgery. METHODS: Retinal oxygen saturation in glaucoma patients was measured using a non-invasive spectrophotometric retinal oximeter. Adequate image quality was found in 49 of the 108 consecutive glaucoma patients recruited, with 30 undergoing trabeculectomy, 11 EX-PRESS and eight trabeculotomy. Retinal oxygen saturation measurements in the retinal arterioles and venules were performed at 1 day prior to and at approximately 10 days after surgery. Statistical analysis was performed using a Student's t-test. RESULTS: After glaucoma surgery, intraocular pressure (IOP) decreased from 19.8 ± 7.7 mmHg to 9.0 ± 5.7 mmHg (p < 0.001). Although oxygen saturation in retinal arterioles remained unchanged before and after surgery (104.7 ± 10.6% before and 105.4 ± 9.3% after surgery, p = 0.58), the oxygen saturation in the venules increased from 54.9 ± 7.4% to 57.4 ± 5.7% (p = 0.01). CONCLUSION: Intraocular pressure (IOP) decreases caused by glaucoma surgery had an effect on the retinal venous oxygen saturation.

Department of Ophthalmology, Kagawa University Faculty of Medicine, Kagawa, Japan. anchovy_e@yahoo.co.jp.

Full article

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Classification:

6.11 Bloodflow measurements (Part of: 6 Clinical examination methods)
12.8.1 Without tube implant (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
12.8.2 With tube implant or other drainage devices (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
12.9 Trabeculotomy, goniotomy (Part of: 12 Surgical treatment)

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