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1987年から1993年の7年間に診療した出生体重1,500g未満の未熟児網膜症自験例233名466眼の成績を報告した。発症率は55.4%,治療率は19.1%,重症瘢痕形成率は0.2%であった。出生体重別に1,000g未満,1,000g以上1,250g未満,1,250g以上に,また,出生在胎週数別に28週未満,28週以上30週未満,30週以上32週未満,32週以上に分け検討した。発症率は出生体重および在胎週数の増加に比し有意に低下した。要治療率は出生体重・在胎週数の増加に比し低下する傾向を示した。治療は点眼麻酔の細隙灯顕微鏡下側臥位光凝固術によった。本法は全身的負担が少なく,全身状態による手術不能の例はなく,これが高い治療率と良好な治療成績の主因と思われた。
We observed 233 babies with the birthweight of less than 1,500g during the 7 years through 1993.Retinopathy of prematurity developed in 55.4% and had to be treated in 19.1% of the 466 eyes. Severecicatricial retinopathy of grade V resulted in 0.2%. The incidence of active retinopathy and of treatmentwere inversely correlated to the birthweight and the gestational age. We used retinal cryoapplication up to1987 and argon laser photocoagulation after 1988. Photocoagulation was performed under topical anesthesiain recumbent position. This method was possible in all the cases and resulted in minimum systemic insult.These features were the underlying causes for the high incidence of treatment and for the favorable outcome.
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