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망막분지정맥폐쇄 황반부종에서의 유리체강내 트리암시놀론 주입술 후 시력호전의 예후인자

Prognostic Factors after Intravitreal Triamcinolone Injection for Macular Edema due to Branch Retinal Vein Occlusion

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목적: 망막분지정맥폐쇄 황반부종에서의 유리체강내 트리암시놀론 주입술 후 시력 호전과 연관된 예후 인자를 알아보고자 하였다. 대상과 방법: 망막분지정맥폐쇄 황반부종으로 유리체강내 트리암시놀론 주입술을 시행한 68명 68안을 대상으로 후향적 분석을 실시하였다. 환자군은 최종시력에 따라 스넬렌 시력표에서 2줄 이상 시력호전이 이루어진 군과 그렇지 못한 군으로 분류하였다. 두 군 사이에서 임상적 특징과 검사 소견 등을 비교하였다. 결과: 시력 호전군은 38안(56%), 시력 비호전군은 30안(44%)이었다. 시력 비호전군에서 증상 발현 후 첫 주입술까지의 기간은 시력호전군보다 더 길었다. 술 전 시력이 좋았던 경우, 1달 이내 시력 호전이 이루어진 경우가 시력 호전군에서 통계학적으로 유의하게더 많았다. 황반 허혈이 있는 안이 시력 비호전군 에서 더 많았으며 망막하액의 존재는 시력 호전 인자로 작용하였다. 결론: 증상 시작 후 조기 치료가 이루어진 경우, 주입술 전 시력이 좋았던 경우, 첫 번째 주입술 후 좋은 치료 반응을 보인 경우, 황반허혈이 없는 경우, 망막하액이 있는 경우 등이 좋은 시력 예후 인자로 작용하였다.

Abstract

Purpose: To evaluate prognostic factors for improvement of visual acuity after intravitreal triamcinolone acetonide injection (IVTA) for treatment of macular edema (ME) secondary to branch retinal vein occlusion (BRVO). Methods: Sixty-eight eyes of 68 consecutive patients treated with IVTA for ME due to BRVO were retrospectively reviewed. Patients were categorized into 2 groups according to the final visual acuity. The ‘gainer group’ consisted of eyes with a gain of 2 or more Snellen chart lines and the ‘non-gainer group’ consisted of eyes with less than 2 lines improvement or which had worsened at the last follow-up visit. Comparative clinical characteristics and ophthalmoscopic examinations were analyzed between the 2 groups. Results: Out of the 68 eyes, 38 (56%) showed improved vision and were categorized as the gainer group; 30 eyes (44%)were categorized as the non-gainer group. The duration of symptoms in the non-gainer group was longer than the gainer group. Additionally, patients with a better baseline vision were expected to show greater improvement. The number of early visual acuity gainers who showed visual improvement at 1 month after IVTA was significantly higher in the gainer group. The number of eyes with angiographically documented macular ischemia was significantly higher in the non-gainer group. Existence of subretinal fluid has been identified as a positive factor for visual improvement. Conclusions: The cases with early treatment, good baseline visual acuity, case of favorable response to the initial IVTA,absence of macular ischemia, and baseline subretinal fluid are favorable prognostic factors for the outcome of visual acuity after IVTA for ME due to BRVO.

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