Heidelberg retina flowmeterによる緑内障眼の乳頭内組織血流量測定の検討

Measurement of blood flow in the optic nerve head in glaucoma eyes using Heidelberg retina flowmeter

（B5-2-22）　Heidelberg Retina Flowmeter （以下，HRF）による視神経乳頭内組織血流測定における至適計測範囲の検討を行った。対象は正常者10例10眼，開放隅角緑内障26例26眼である。測定値は計測範囲の拡大により再現性が良好になったが，HRFパラメーターとHumphrey視野変化指数との相関においては，計測範囲10×10pixelで有意な相関が得られた。HRFでの視神経乳頭内組織血流測定は10×10pixelが至適計測範囲であることが示唆された。

We measured the blood flow in the optic nerve head in 26 eyes of open-angle glaucoma using a Heidelberg retina flowmeter. Another series of 10 normal eyes served as control. We aimed to determine the optimal target square for this method. The reproducibility of disc blood flow became better when larger target squares were used. The target square of 10 x 10 pixels gave a statistically significant correlation between the blood flow parameters and visual field indices as determined by Humphrey field analyzer. It is concluded that this target square size is optimal in the reproducible measurements of blood perfusion in the optic nerve head.