The development of continuous circulating blcod volume monitoring system and its clinical application

Abstract

Electrical resistivities in blood and ultrafiltrate were continuously measured with disposable electrodes placed in extracorporeal blood circuit. Geddes's formula which indicated the relation between hematocrit and blood electrical resistivity was modified by the authors. Clinical findings obtained with monitoring the blood volume change during hemofiltraticn treatment for chronic renal failure are as follows: 1. When the body position was changed f ram reclining to sitting posture, the blood volume decreased to 4.2±0.3% (mean±S. D.). 2. Keeping the body water removal rate ccnstant, the blood volume change has been greatly affected by food intake.