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[The effect of changes in the blood flow and the level of arterial and venous pressures on the filtration-absorptive processes in the small intestine].

Under conditions of perfusion of the small intestine's vessels with constant volume of the auto-blood, stationary shifts of the arterial perfusion pressure by +/- 50 mm Hg and/or blood flow by +/- 50% of the initial level practically did not affect the size of the exchange surface of the organ's microvessel bed (the capillary filtration coefficient) or the average capillary pressure in artificially stabilised pressure of venous outflow at the level of 6 mm Hg. However, under conditions of normo-, hypo- and hypertone of the small vessels' smooth muscles, the shifts of the venous outflow pressure (from 0 to 24 mm Hg) increased the exchange surface of the microvessels and the average capillary pressure. The mechanisms of the shifts in microhemodynamics and transcapillary exchange of fluid are discussed.