[Changes in the functions of the blood vessels of skeletal muscles during acute hypothermia].

In acure experiments on cats, changes of resistance, capacitance and filtration-absorption functions of the m. gastrocnemius' vessels in acute cooling (from 37 degrees C to 29-27 degrees C) involved first a raise of the perfusion pressure in the vessels and its drop in further cooling to 25 degrees C. The pre- to post-capillary ratio remained unchanged. Integral stretching ability of the venous bed was increasing along with the cooling. The capillary filtration coefficient was considerably increased. The capillary hydrostatic pressure increased in cooling to 27 degrees C and then decreased in further cooling to 25 degrees C.