Auswirkungen einer akuten Blutung beim Kaninchen auf den Blutfluß im Auge und in einigen anderen Geweben. Die Rolle der sympathischen Nerven

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Abstract
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.

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