Plasma and red cell volumes of microwave irradiated mice tissues.

A double isotope technique was applied to the microwave irradiation of mice for reliable measurement of the distribution of red cells and plasma. Microwaves provide a means for rapid cessation of circulation. Hematocrit values of blood in minute tissue samples can be estimated. The red cell and plasma volumes as well as the hematocrit values of the liver, kidney, spleen, intestine, lung and brain tissues of mice are presented. A biological filtration of technetium labelled red cells is necessary for their physiological distribution in circulation.