糖尿病網膜症に対する硝子体手術前後の耳側縫線領域における蛍光眼底所見

Fluorescein angiographic findings of temporal raphe area before and after vitreous surgery for diabetic retinopathy

要約　糖尿病網膜症18例21眼に硝子体手術を行い，その前後の蛍光眼底造影所見を検索した。年齢は50～78歳，平均64.6±10.4歳である。術後の所見は，手術から2～6か月，平均3.3±1.3か月の時点で観察した。手術を行わない15眼を対照とした。検索する眼底部位は，中心窩耳側の縫線領域に限定した。術後の毛細血管瘤数は術前に比べ，減少9眼，不変8眼，増加4眼であり，対照群と差がなかった。術後の無灌流野は減少7眼，不変9眼，増加5眼であり，対照群での減少0眼，不変10眼，増加5眼と比べ，減少について有意差があった（p＜0.05）。以上の所見は，硝子体手術後に毛細血管瘤の増減がなく，無灌流野が減少したことを示している。

Abstract.　We performed vitreous surgery for diabetic retinopathy in 21 eyes of 18 patients. The age of patients ranged from 50 to 78 years,averge 64.6±10.4 years. The postoperative findings were evaluated 2 to 6 months,average 3.3±1.3 months,after surgery. Another series of 15 eyes that did not receive surgery served as control. Fluorescein angiographic findings were compared before and after surgery. We examined only the area along the raphe temporal to the fovea as the object of our study. After surgery,microaneurysms in this area decreased in 9 eyes,unchanged in 8 and increased in 4. These values were the same as in controls. Capillary nonperfusion in this area decreased in 7 eyes,unchanged in 9 and increased in 5. In the controls,it decreased in none,unchanged in 10 eyes and increased in 5. There was a significant difference in the incident of decrease between the two groups（p＜0.05）. The findings show that vitreous surgery for diabetic retinopathy may not induce differences in capillary microaneurysms and a decrease in capillary nonperfusion.