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要約 目的:緑内障チューブシャント手術(エクスプレス)の術後中期成績について検討した。
対象と方法:対象はエクスプレス施行後36か月以上経過観察可能であった原発開放隅角緑内障34眼とした。同時期に線維柱帯切除術(LEC)が施行された33眼をコントロール群とし,眼圧,累積生存率,術後合併症について後ろ向きに比較検討した。
結果:眼圧は両群ともに観察期間中,術前と比較し有意な眼圧下降を維持した。術後36か月の累積生存率はエクスプレス群79.4%,LEC群72.7%と両群間に有意差を認めなかった。手術前後の角膜内皮細胞密度の減少率は,エクスプレス群では4.2%,LEC群では5.4%であった。術後合併症は,LEC群では低眼圧黄斑症や濾過胞感染症などの重篤な合併症を認めたが,エクスプレス群では認めなかった。エクスプレス群の予後不良因子の検討では,術前の眼圧が30mmHg以上であることが予後不良因子となった。
結論:エクスプレスはLECよりも術後合併症が少ないものの,LECと同等の眼圧下降効果を有する。ただし,術前眼圧が高い症例では術式選択には注意を要する。
Abstract Purpose:This study examined the mid-term postoperative results of glaucoma tube shunt surgery(EX-PRESS®).
Methods:Thirty-four eyes with open-angle glaucoma that could be followed up for at least 36 months after the Express procedure were analyzed. The control group included 33 eyes that underwent trabeculectomy(LEC)at the same time. We retrospectively compared intraocular pressure(IOP), cumulative survival rate, and postoperative complications between the groups.
Results:The IOP decreased significantly in both groups during the observation period as compared with the preoperative as level. Cumulative survival rates were not significantly different between the two groups(79.4% in the Express group and 72.7% in the LEC group). The pre- and postoperative reduction rate of corneal endothelial cell density was 4.2% in the Express group and 5.4% in the LEC group. Severe postoperative complications, such as low ocular pressure maculopathy and follicular infection, were observed in the LEC group but not in the Express group. In the Express group, a preoperative IOP of 30 mmHg or higher was a poor prognostic factor.
Conclusion:The Express procedure is as effective as LEC in lowering IOP and has fewer postoperative complications than LEC. However, caution should be exercised in selecting procedure in patients with high preoperative IOP.
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