The effect of vasopressin upon the vasculature of the isolated perfused rat kidney

Abstract

The timed uptake of 131 I‐labelled human serum albumin was used as an index of regional perfusion in the isolated rat kidney. 1. Arginine vasopressin in doses of 1, 5 and 10 μu./ml. of perfusate decreased papillary perfusion. Total renal perfusion was decreased only by the 5 μu. dose. 2. Ornithine‐8‐vasopressin in doses of 5 and 10 μu./ml. of perfusate decreased papillary perfusion. Total renal perfusion was decreased only by the 10 μu. dose. 3. When the relative viscosity of the perfusate was increased to a value of 2·0 from the control value of 1·7, both papillary perfusion and total renal perfusion were reduced. 4. Arginine vasopressin further reduced papillary flow in kidneys perfused with high viscosity artificial plasma.