Autoregulation of intravascular pressure in preglomerular juxtamedullary vessels

In vitro measurements of the intravascular pressure in the different arterial segments from the arcuate to the afferent arterioles and the glomerular capillaries were undertaken to investigate the intravascular pressure autoregulation existing inthe pre-glomerular vascular bed. Results indicate that a large proportion, 65%,of the autoregulatory function is mediated by the distal afferent arterioles. The interlobular arteries also contribute significantly to pressure autoregulation.