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Abstract #3658 Published in IGR 4-2
Midterm ultrasound biomicroscopy findings in eyes with successful viscocanalostomy
Negri Aranguren I; Croxatto O; Grigera DEJournal of Cataract and Refractive Surgery 2002; 28: 752-757
PURPOSE: To show tissue changes using ultrasound biomicroscopy (UBM) in eyes with controlled intraocular pressure (IOP) after viscocanalostomy. METHODS: This retrospective noncomparative case series comprised 23 eyes of 19 patients with uncontrolled open-angle glaucoma who had viscocanalostomy and UBM and a mean follow-up of 20 months ± 5.9 (SD) (range, 12-30 months). The UBM measurements were taken a mean of 6.8 ± 5.9 months (range, 3-14 months) after the viscocanalostomy. In seven eyes, UBM was again performed a mean of 7.8 ± 4.6 months (range, 7-9 months) after the first study. All patients had preoperative and postoperative IOP measurements. RESULTS: The mean IOP at last examination was 13.3 ± 2 mmHg (range, 8-17 mmHg). One eye had evidence of a subconjunctival bleb. All eyes had a nonreflective scleral chamber and posterior to it, a hyporeflective zone. In seven eyes in which two UBMs were performed, the scleral chamber was unchanged seven to nine months after the first study. CONCLUSIONS: The presence of a scleral chamber and absence of a subconjunctival filtering bleb are the usual UBM findings in eyes with adequate control of IOP several months after viscocanalostomy. These findings suggest that viscocanalostomy is successful when a continuous aqueous flow through the trabeculo-Descemet's membrane is present, maintaining a scleral chamber.
Dr. I. Negri Aranguren, Consultores Oftalmologicos, Buenos Aires, Argentina. inegri@ciudad.com.ar
Classification:
12.8.3 Non-perforating (Part of: 12 Surgical treatment > 12.8 Filtering surgery)