Bill A
Klin Monbl Augenheilkd. 1984 Apr;184(4):305-7. doi: 10.1055/s-2008-1054472.
The labeled microsphere method was used to determine the blood flow in the eyes and some other tissues in conscious rabbits with unilateral section of the cervical sympathetic chain. Flow measurements were made before and after a hemorrhage corresponding to 17.3 +/- 1.6 ml/kg body weight. The mean arterial blood pressure fell from 90 +/- 3 mmHg to 53 +/- 2 mmHg. Before bleeding, the blood flow in the iris, ciliary body and choroid was similar on the two sides. After the hemorrhage there was little change in the blood flow in the brain and adrenals. The flow in heart muscle and kidney cortex was 70 and 48% of that before the bleeding, respectively. In the stomach wall, the spleen and the skin the corresponding figure was 10%. In the iris, ciliary body and choroid the flow on the intact side was 37, 26 and 38%, respectively, of that before the bleeding. On the other side the flow was slightly higher. The results indicate that there was little sympathetic tone to the blood vessels of the uvea either before or after the hemorrhage and that circulating vasoconstrictor substances had only a slight to moderate effect on the uveal blood vessels.
采用标记微球法测定清醒家兔单侧颈交感神经链切断后眼及其他一些组织的血流量。在相当于17.3±1.6 ml/kg体重的出血前后进行血流量测量。平均动脉血压从90±3 mmHg降至53±2 mmHg。出血前，两侧虹膜、睫状体和脉络膜的血流量相似。出血后，脑和肾上腺的血流量变化不大。心肌和肾皮质的血流量分别为出血前的70%和48%。胃壁、脾脏和皮肤的相应数字为10%。在虹膜、睫状体和脉络膜中，完整侧的血流量分别为出血前的37%、26%和38%。另一侧的血流量略高。结果表明，出血前后葡萄膜血管的交感神经张力均很小，循环中的血管收缩物质对葡萄膜血管的影响仅为轻度至中度。
