Abstract
Summary
The effects of renal arterial infusion of acetylcholine (ACh) on renal fluid dynamics were studied. It was found that ACh caused prevenous vascular dilation with no change in venous outflow resistance. A pronounced rise in intrarenal venous pressure resulted from increased renal blood flow through an unchanged venous outflow resistance. Marked increases in capsular and hilar renal lymph pressures as well as renal tissue pressure were also observed, but were probably secondary to the increased intrarenal venous pressure.
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