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선택적 레이저 섬유주성형술의 장기임상효과와 성공예측인자의 분석

Long-Term Outcomes and Predictive Factors for Success of Selective Laser Trabeculoplasty

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초록

목적: 선택적 레이저 섬유주성형술(Selective laser trabeculoplasty, SLT)의 장기임상효과 및 성공예측인자를 분석하고자 하였다. 대상과 방법: 2004년부터 2011년까지 SLT를 시행 받고 2년 이상 추적 관찰한 녹내장 및 고안압증 환자 66명 66안을 대상으로 의무기록을 후향적으로 분석하였다. 대상 환자는 시술 1시간 전, 시술 후 1주, 1개월, 이후 3개월마다 안압을 측정하였다. SLT의 성공을 시술후 시술 전 안압보다 3 mmHg 이상 또는 20% 이상 감소한 경우로 정의하였다. Kaplan-Meier 생존분석을 이용하여 성공률을 산출하였고 Cox propotional hazard model을 이용하여 성공예측인자를 분석하였다. 결과: 평균 추적관찰 기간은 4.78 ± 1.98 (2-8)년이었으며 술 전 평균 안압은 23.79 ± 2.83 mmHg, 추적관찰 기간 동안 평균 안압하강은 6.64 ± 3.21 mmHg였다. SLT 성공률은 1년째 80%, 2년째 75%, 3년째 69%, 4년째 63%, 5년째 50%, 6년째 45%, 7년째 42%였다. 높은 술 전 안압만이 SLT성공과 통계학적으로 유의한 양의 상관관계를 보였다(p=0.044). 결론: SLT는 녹내장 환자에서 장기적으로 안압을 하강시킬 수 있는 효과적인 치료방법이며 술 전 안압이 높을수록 SLT의 성공률이높았다.

Abstract

Purpose: To investigate long-term outcomes and predictive success factors for selective laser trabeculoplasty (SLT). Methods: This retrospective chart review included 66 eyes of 66 glaucoma or ocular hypertension patients who underwent SLTbetween 2004 and 2011. All patients were followed-up for at least 2 years after the procedure. The intraocular pressure (IOP)was measured before the treatment, at postoperative 1 week, 1 month and every 3 months thereafter. Success was defined asan IOP decrease ≥ 3 mm Hg or ≥ 20% of the pretreatment IOP. The success rate was determined based on the Kaplan-Meiersurvival analysis. The predictive success factors were analyzed using the Cox proportional hazard model. Results: The mean follow-up period was 4.78 ± 1.98 (2-8) years. The mean pretreatment IOP was 23.79 ± 2.83 mm Hg. Themean IOP reduction was 6.64 ± 3.21 mm Hg. The success rates were 80%, 75%, 69%, 63%, 50%, 45%, and 42% after 1, 2, 3,4, 5, 6, and 7 years, respectively. Only high pretreatment IOP was significantly correlated with success (p = 0.044). Conclusions: SLT was an effective tool for lowering IOP in glaucoma patients. Higher pretreatment IOP was a predictive successfactor.

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