Transcapillary Exchange in Relation to Capillary Circulation

Transcapillary Exchange in Relation to Capillary Circulation

Transcapillary exchange of diffusible solutes depends on capillary blood flow, Q; capillary permeability, P; and capillary surface area, S. In a single capillary, the extent of equilibration of a given solute depends on the ratio of Q, to the product of P and S. In a microvascular bed consisting of many capillaries, equilibration depends on the fraction of them which are open to blood flow at a...

Capillary blood flow and transcapillary exchange.

Dynamics of Transcapillary Fluid Exchange

Fluid balance at the capillary level has been simulated with an analogue computer program, based on experimental data on regional differences in capillary permeability, surface areas, and hydrostatic pressures. The program takes into account fluid and protein fluxes into and out of the interstitial space. Solutions are obtained for tissue hydrostatic pressure, tissue fluid osmotic pressure, int...

Transcapillary fluid exchange in the renal cortex.

• In the microcirculation of the renal cortex, fluid exchange proceeds at very high rates in two anatomically and functionally distinct capillary systems, the glomerular and the peritubular capil-laries. Net ultrafiltration is confined to the glomeru-lus, which consists of a tuft of capillaries surrounded by the ultrafiltrate enclosed within Bowman's capsule at the proximal end of the nephron. ...

Renal, transcapillary, net exchange in the dog.

The transcapillary net exchanges of inulin, para-ajiiinohippurate, thiocyanate and heavy water were determined in the renal circulation. It was found that the tracer substances larger than heavy water diffused more freely through renal than through previously studied peripheral or pulmonary capillaries. The results are consistent with the concept of a larger pore size in renal capillaries. P RE...