Purpose: To evaluate efficacy of combined vitrectomy with posteriorly placed glaucoma drainage device (GDD) in lowering intraocular pressure (IOP) in children.
Methods: The medical records of children who underwent vitrectomy with posteriorly placed GDD were reviewed retrospectively. Patients with a minimum of 6 months' follow-up were included. The first eye operated on for each patient was analyzed. Success was defined as IOP of 5-20 mm Hg and no additional IOP-lowering surgery or visually devastating complications.
Results: A total of 20 patients were included, with the following etiologies: primary infantile-onset glaucoma, 5 (25%); traumatic glaucoma, 3 (15%); Peters anomaly, 3 (15%); microphthalmia, 5 (25%); glaucoma following cataract surgery, 2 (10%); microspherophakia, 1 (5%); and retinopathy of prematurity, 1 (5%). Eyes with corneal opacification (8 [40%]) underwent endoscopic vitrectomy (5 [25%]), concurrent penetrating keratoplasty (3 [15%]) and/or keratoprosthesis surgery (1 [5%]). Mean follow-up was 1.9 ± 1.1 years (range, 6.5-49.2 months). Vision remained stable or improved in 17 eyes (85%). Mean IOP decreased from 27.2 ± 10.1 mm Hg to 14.5 ± 6.8 mm Hg (P < 0.0001) at last follow-up or at failure. Kaplan-Meier curves showed 12- and 24-month rate of IOP control of 69% and 62%, respectively. The number of glaucoma medications decreased from a mean of 2.3 ± 1.4 to 1.3 ± 1.2 (P < 0.015) at last follow-up or at failure. Overall success rate was 65%. Complications included hypotony (3 [15%]), vitreous hemorrhage (1 [5%]), and retinal detachment (1 [5%]). Two eyes (10%) required surgery for hypotony; 4 eyes (20%) underwent additional glaucoma surgery.
Conclusions: Combined surgical approach with vitrectomy and posteriorly placed GDD decreased IOP in complex pediatric glaucomas. Further, endoscope-assisted vitrectomy is useful in cases with corneal opacification. Complication rates of this combined procedure appear to be comparable to traditional anterior chamber approach.
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