Abstract
Summary
When the renal artery and vein and ureter are simultaneously occluded and then the renal vein cut, there flows out of the kidney a volume of fluid equal to about 20% of the functionally distended kidney. Little or no fluid flows out, in the same experiment, if only the artery or the ureter is cut. The fluid draining from the vein was analyzed, along with a simultaneously drawn sample of systemic arterial blood. The ratio of the kidney fluid to the arterial blood for hematocrits was 0.67; those for the 2 plasmas were: for plasma proteins, .71; for Na, 1.0; for K, 1.8; and for Cl, 1.1.
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