Functional evaluation of the filtering bleb by ultrasound biomicroscopy after trabeculectomy with mitomycin C

• Published in: International journal of ophthalmology Vol. 11; no. 2; pp. 245 - 250
• Main Authors: El Salhy, Ali Abbas, Elseht, Rabab Mohamed, Al Maria, Ahmed Fekry, Shalaby, Saied Mohamed Abd El-Wahab, Hossein, Tarek Ragaee
• Format: Journal Article
• Language: English
• Published: China International Journal of Ophthalmology Press 18.02.2018; Press of International Journal of Ophthalmology (IJO PRESS)
• Subjects: bleb reflectivity; Clinical Research; filtering bleb; sclerotomy site; sub-scleral tract; ultrasound biomicroscopy; filtering bleb; sclerotomy site; sub-scleral tract; ultrasound biomicroscopy; bleb reflectivity
• ISSN: 2222-3959; 2227-4898
• DOI: 10.18240/ijo.2018.02.11

AIM： To study the role of ultrasound biomicroscopy（UBM） in the assessment of the bleb function after trabeculectomy with mitomycin C（MMC）. METHODS： This was a cross-sectional study including all cases had undergone trabeculectomy with MMC 0.2 mg/mL for 3 min. Participants were recruited from the follow-up cases at Department of Ophthalmology, Tanta University in the period from August 2015 to August 2016. Full history taking and ophthalmological examination were performed. Intraocular pressure（IOP） was measured using Goldmann applanation tonometry and the history of prescribed postoperative antiglaucoma medications was recorded. Accordingly, the trabeculectomy blebs were divided clinically into successful blebs when the IOP post-operative was ≤18 mmHg without medications. Scanning examination of the filtering bleb using UBM examination was performed at the period from 2 to 36 mo after trabeculectomy（13.6±9.7 m o）. RESULTS： This study included 33 trabeculectomy filtering blebs of 25 patients（9 males and 16 females）. The mean age of patients was 53.2±14.2 y（range 25-71y）. We had 20 eyes with complete success, 9 eyes with qualified success, and 4 eyes with failure after trabeculectomy with MMC. The blebs were classified into successful blebs（IOP ≤18 mmHg without antiglaucoma medications）, others were classified into qualified successful and failed blebs. There was a significant correlation between certain UBM findings（intra-bleb reflectivity, draining sub-scleral tract, bleb height, and intrableb fluid cysts） and cases with different grades of clinical functional success（P〈0.01）.CONCLUSION： UBM is an objective tool in the functional assessment of the post-trabeculectomy filtering bleb through a significant correlation between certain UBM parameters and the different grades of clinical functional success.