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  • Title: [Effect of local medications on intraocular pressure control following trabeculectomy].
    Author: Detry-Morel M, Boschi A, Sempoux P, Hoebeke M, Sempoux C, Marbaix E, Ilunga J, Bouckaert A.
    Journal: Bull Soc Belge Ophtalmol; 1995; 259():135-41. PubMed ID: 8983530.
    Abstract:
    Longterm administration of topical antiglaucoma therapies had been indicated to be a serious risk for failure of trabeculectomy through inducing a subclinical inflammation of conjunctival tissues and stimulating secondary fibroblastic proliferation. Our study had 3 main aims: (1) to check if this pejorative effect is present in our population of glaucomatous patients, (2) in order to improve the rate of surgical success in theoretically high risk patients (duration of topical treatment longer than 36 months), to determine the usefulness of the following actions: suppression of beta blocking agents 8 days before surgery, suppression of miotics and eventual topical administration of fluorometholone one month before surgery. (3) to correlate the observed clinical results to the cellular profile of preoperative conjunctival biopsies. We presented in a first step the results of a retrospective analysis including 88 trabeculectomies performed between January '93 and April '95 in 62 GCAO patients older than 40 years and without any previous ocular surgery. The mean age of patients was 66,8 years (41 to 87 years). Patients were classified into "complete success", "qualified success" and "failures" according to the "target" IOP was or was not reached in the last examination. Mean follow up was 5,8 months (1 to 26 months). The second prospective part of our study included 20 trabeculectomies performed in 16 patients we chose according to the nature, the duration of the preoperative topical therapy and the preoperative eventual preparation of the conjunctiva. This study also included a semiquantitative count of the different conjunctival cellular colonies in peroperative biopsies. Mean follow up of this study was 2,3 months (1 to 5 months). 31 "complete success", 52 "qualified success" and 5 "failure" were observed in the retrospective study. The reduction of IOP following trabeculectomy was statistically significant at all examinations (mean IOP in the last examination: 14,9 +/- 4,3 mmHg) but the level of success was not significantly different according to the nature, (mono against polytherapy), the duration of preoperative medical topical treatment, as well as the preoperative actions in order to improve the operative success in high risk patients. Preliminary results of our second prospective study did not yet show any failure and did not exhibit any clear correlation between the counts of the different cellular colonies and the level of operative success on one hand and the different topical therapies in the other hand. The results and limitations of this study were compared to those of the literature.
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