The influence of phacoemulsification on surgical outcomes of trabeculectomy with mitomycin-C for uveitic glaucoma

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Abstract

Purpose: To evaluate the influence of phacoemulsification after trabeculectomy on the postoperative intraocular pressure (IOP) in eyes with uveitic glaucoma (UG). Setting: Kumamoto University Hospital, Kumamoto, Japan. Design: A retrospective cohort study. Methods: The medical records of patients with UG who had trabeculectomy with mitomycin-C (MMC) were reviewed. Complete and qualified surgical failures were defined by an IOP of ≥21 mmHg (condition A), ≥18 mmHg (condition B), or ≥15 mmHg (condition C) without and with glaucoma eye drops, respectively. Kaplan-Meier survival analysis, generalized by the Wilcoxon test, and the Cox proportional hazards model analysis were conducted. Post-trabe-culectomy phacoemulsification was treated as a time-dependent variable. In 24 (30%) of the included 80 eyes, phacoemulsification was included, and they were divided into two groups: groups I (8 eyes with phacoemulsification within 1 year after trabeculectomy) and group II (16 eyes after 1 year following trabeculectomy). Results: Multivariable Cox proportional hazards model analysis showed post-trabeculectomy phacoemulsification was a significant factor in both complete success and qualified success based upon condition C (P = 0.0432 and P = 0.0488, respectively), but not for the other conditions. Kaplan-Meier survival analyses indicated significant differences in success probabilities between groups I and group II for complete success and qualified success based upon condition C (P = 0.020 and P = 0.013, respectively). There was also a significant difference for qualified success based upon condition B (P = 0.034), while there was no significant difference for the other conditions. Conclusion: Post-trabeculectomy phacoemulsification, especially within 1 year, can cause poor prognosis of IOP control of UG eyes after trabeculectomy with MMC.

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Nishizawa, A., Inoue, T., Ohira, S., Takahashi, E., Saruwatari, J., Iwao, K., & Tanihara, H. (2016). The influence of phacoemulsification on surgical outcomes of trabeculectomy with mitomycin-C for uveitic glaucoma. PLoS ONE, 11(3). https://doi.org/10.1371/journal.pone.0151947

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