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  • Title: Short term experience with "modern" trabeculectomy augmented with intraoperative antimetabolites.
    Author: Detry-Morel M, Pourjavan S.
    Journal: Bull Soc Belge Ophtalmol; 2005; (296):37-48. PubMed ID: 16050418.
    Abstract:
    PURPOSE: Owing to its technical refinements, "modern" trabeculectomy aims to reduce the incidence and severity of early postoperative complications while increasing postop IOP success. The purpose of our study was to evaluate namely the safety of "modern" trabeculectomy, the quality of the filtration blebs, the influence on the quality of life and secondarily IOP reduction according to the surgical procedure whether augmented with peroperative application of antimetabolites or not. MATERIAL-METHODS: Retrospective study including our 45 first consecutive procedures in 38 patients (mean age: 61.1 years) with medically uncontrolled various glaucomas. All procedures were performed according to a modified P. Khaw's protocol. Antimetabolites were applied peroperatively in 28/45 eyes (62.2%) with a history of previous filtering surgery (12/28 eyes) and/or advanced glaucomatous damage (22/28 eyes). Antimetabolites were not used in the 17/45 other eyes with lower surgical risk factors and higher target IOP, surgical procedure was not augmented with antimetabolites. Postoperative management included laser suture lysis, withdrawal of adjustable sutures and 5-FU injections when needed. Complete ocular examination was carried out preoperatively and postoperatively at day 1, 7, at 1, 2 and 3 months and every 3 months thereafter. All patients were questioned for symptoms associated with filtration bleb dysesthesia at the last visit. RESULTS: The mean follow-up was 7.9 +/- 3.3 in the group without antimetbolites and 5.3 +/- 2.2 months in the group with antimetabolites (p < 0.05). Final mean IOP (+/-SD) was significantly lower in the group augmented with antimetabolites (11.2 +/- 4.5 mmHg) compared with the group without antimetabolites (14.9 +/- 3.7 mm Hg) (p < 0.05). Complete and qualified success were respectively 64.3% and 89.3% in the group with antimetabolites and 70.6% and 82.4% in the subgroup without antimetabolites (p > 0.05). 1st month postoperative complications were transient and minor. They occurred in 59% in the group without antimetabolites and in 68% in the subgroup augmented with antimetabolites. Complications had comparable frequency of distribution between the 2 subgroups (p > 0.05). 84% of the filtration blebs (30/45) were diffuse and mildly vascularized. Avascular blebs were noticed in 7 eyes (15.5%) and were not related with the intraoperative application of mitomycin C (p > 0.05). Subjective comfort was good to excellent in 42/45 eyes (93.3%). Mean final visual acuity was not altered compared with preop level (p > 0.05). CONCLUSIONS: Our short term results suggest that the safety of "modern" trabeculectomy augmented with antimetabolites is comparable to those without intraoperative antimetabolites. Filtration blebs were very well tolerated in most patients. The peroperative use of antimetabolites precludes to appreciate if the success rates are due to the use of antimetabolites and/or the technique per se.
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