A method for obtaining living leukocytes from human peripheral blood by acceleration of erythrocyte sedimentation

A simple method for obtaining living leukocytes from human peripheral blood ispresented. It consists of the addition of fibrinogen to heparinized blood. Essentiallyall the leukocytes remain in plasma suspension and essentially all the erythrocytesare sedimented out at the end of one hour.

Note: ACKNOWLEDGMENTThe authors wish to express their thanks to Miss Alma Manieri, who did all the blood counts forthis study, and to Mr. Antol Herskovitz, who prepared the photomicrographs.