[The microcirculatory bed of the rabbit pinna under increased blood concentration].

Microvessels of rabbit left and right ear chamber and blood samples drawn from the internal ear vein in response to hemoconcentration were studied. The apparent viscosity of the outflowing blood in the left side was shown to be preserved with an increase of hemoconcentration. In the right one episode of increasing occurred. The invariance of the total area of perfused microvessels to increased hemoconcentration in the right side was fixed, whereas in left side it changed. The variation of regional resistance was analysed on the basis of our data according to Poiseuille's [correction of Puazeil] equation.