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PRECIS: Gonioscopy-assisted transluminal trabeculotomy yielded a 45% reduction in intraocular pressure in primary congenital glaucoma, with a success rate of 86.6%. Hyphema was the most common complication. We did not encounter any vision-threatening complications. BACKGROUND: To assess the outcome of gonioscopy-assisted transluminal trabeculotomy (GATT) in primary congenital glaucoma (PCG) and identify the potential prognostic factors for adverse outcomes. METHODS: This prospective study included patients aged <14 years, presenting with PCG from November 2019 till November 2021. We excluded eyes with hazy cornea, secondary glaucoma, peripheral anterior synechiae ≥ 90°, and eyes in which the extent of GATT was <270°. Success was defined as a final intraocular pressure (IOP)<18 mmHg with IOP reduction>20%. Primary outcomes were reduction in IOP and medications, secondary outcomes were complications and correlation of IOP reduction and surgical success with possible risk factors. RESULTS: We included 60 eyes of 50 patients aged 1-156 months (mean: 25.5±36.5). A 353°±21° incision was created, with 85% achieving a 360° incision. There was a significant reduction in IOP and medications at all follow-up intervals up to 2 years, with a mean of 45% IOP reduction. The final success rate was 86.6%, with 76.7% being controlled without medications. There was a significant positive correlation between the preoperative cup-to-disc ratio (CDR) and failure rates (P=0.03) and between the incision extent and the IOP reduction (r=0.4, P=0.001). Hyphema was the most common complication, affecting 33%, and resolved spontaneously in all cases. No vision threatening complications occurred. CONCLUSION: GATT is a safe and effective procedure in eyes with PCG and clear cornea, including eyes that had previous failed glaucoma surgery. Circumferential GATT is associated with more favorable outcomes, while eyes with a larger CDR are at a higher risk for failure.
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Purpose: To evaluate the one-year outcomes of gonioscopy-assisted transluminal trabeculotomy (GATT) in primary congenital glaucoma (PCG) with a history of prior glaucoma surgery. Methods: A retrospective chart review was performed to identify all PCG patients ≤ 16 years who underwent GATT surgery at Cairo University Children's Hospital from January 2016 to March 2022. Pre- and postoperative intraocular pressure (IOP) and glaucoma medications were collected at 1, 3, 6, 9, 12, and last follow-up visits. Success was defined as IOP ≤ 21 mmHg without (complete) or with (qualified) glaucoma medications at the last follow-up. Results: Seven eyes of 6 subjects were included in the study. The mean IOP was statistically significantly reduced from 25.7 ± 5.9 mmHg preoperatively to a mean IOP of 12 ± 1.5 mmHg (P = 0.001) at 12 months and 11.5 ± 1.2 mmHg (P = 0.001) at the last follow-up visit. Six eyes (85.7%) achieved complete success, and one eye (14.2%) achieved qualified success. No patients required further glaucoma procedures. No serious intra- or postoperative complications were identified. Conclusions: Our early experience highlights that GATT can be performed as an alternative procedure before considering conjunctival or scleral glaucoma surgeries.