[Characteristics of conjugate functions of the vessels of skeletal muscles and intestines during separate and combined action of hypoxia and hypothermia on the body]

Abstract

In regimen of the constant blood flow perfusion of skeletal muscles and intestine, hypoxia reduced precapillary resistance and increased the capillary filtration coefficient in both organs whereas postcapillary resistance and capillary pressure were reduced in the intestine and increased in the muscle. Hypothermia increased precapillary resistance in the intestine rather than in the muscle whereas the changes of the capillary filtration coefficient were contrary in both organs; postcapillary resistance and capillary pressure had a tendency to increase in the muscle whereas an increase in these parameters was quite evident in the intestine. Combined effect of hypoxia and hypothermia involved a decrease in precapillary resistance and distensibility of venous vessels, an increase in capillary filtration coefficient in both vascular regions, an increase in postcapillary resistance and in capillary pressure in the intestine, and their decrease in the muscle. In hypothermia (about 30 degrees C), the hypoxic stimulus induced insignificant shifts in all the parameters under study in both organs.