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要約 目的:緑内障に対する経強膜的マイクロパルス毛様体光凝固術(MP-CPC)の治療成績を検討すること。
対象と方法:2019年1月〜2022年12月に名古屋市立大学病院で初回MP-CPCを施行し,6か月以上経過観察した37眼を対象に,病型,眼圧,薬剤スコア,追加手術の有無について後ろ向きに検討した。
結果:平均年齢75.1歳,術前眼圧は21.7mmHgで,病型は原発開放隅角緑内障17眼,正常眼圧緑内障2眼,落屑緑内障5眼,血管新生緑内障3眼,続発緑内障10眼であった。術前薬剤スコアは5.3で,炭酸脱水酵素阻害薬は19眼で内服していた。術後6か月以内に2回目のMP-CPCを含む追加治療を施行しなかった25眼(68%)の術後眼圧は,1か月後14.7mmHg,3か月後14.8mmHg,6か月後15.6mmHgで,どの時点においても有意に下降していた(p<0.01)。眼圧下降率は術後1か月で25.2%,3か月で26.8%,6か月で19.7%であった。薬剤スコアは術後3か月,6か月後とも4.8で有意に減少していた(p<0.05)。また,炭酸脱水酵素阻害薬は術前15眼が内服していたが,術後3か月では3眼,6か月では2眼と有意に減少していた(p<0.001)。術後6か月以内に追加治療を要した12眼(32%)のうち,5眼は術後1か月以内に追加治療を施行していた。経過観察中に持続的な低眼圧や眼球癆などの重篤な合併症は認めなかった。
結論:MP-CPCは眼圧下降効果を示し,薬剤スコアも減らしうる低侵襲な治療法と考える。
Abstract Purpose:To evaluate the clinical outcomes of micropulse transscleral cyclophotocoagulation(MP-CPC) in patients with glaucoma.
Methods:This retrospective study included 37 eyes treated with initial MP-CPC at Nagoya City University Hospital between January 2019, and December 2022, with a minimum follow-up of 6 months. Data on glaucoma type, intraocular pressure(IOP), antiglaucoma medication scores, and additional surgical interventions were collected and analyzed.
Results:The mean age of patients was 75.1 years, and the mean baseline IOP was 21.7 mmHg. The diagnoses included primary open angle glaucoma(17 eyes), normal tension glaucoma(2 eyes), pseudoexfoliation glaucoma(5 eyes), neovascular glaucoma(3 eyes), and secondary glaucoma(10 eyes). The baseline medication score was 5.3, and 19 patients were taking oral carbonic anhydrase inhibitors(CAIs). Among the 25 eyes(68%) that did not undergo additional surgeries including the second MP-CPC session within 6 months, postoperative IOP was significantly lowered at all time points:14.7 mmHg at 1 month, 14.8 mmHg at 3 months, and 15.6 mmHg at 6 months(all p<0.01). The IOP reduction rates were 25.2%, 26.8%, and 19.7% at, 1, 3, and 6 months, respectively. The antiglaucoma medication score was significantly reduced to 4.8 at 3 months and 4.8 at 6 month postoperatively(p<0.05). The number of patients on oral CAIs decreased significantly from 15 at baseline to three at 3 month and two at 6 months postoperatively(p<0.001). Of 12 eyes(32%) that required additional treatment, five eyes underwent reintervention within the first month.
Conclusions:MP-CPC appears to have the potential to lower IOP and possibly reduce the use of antiglaucoma medications, suggesting its potential as a viable treatment option for glaucoma.

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