Journal article
EVALUATION OF THE DOPPLER FLOWMETER FOR NEASUREMENT OF BLOOD FLOW IN SMALL VESSELS OF UNANAESTHETIZED ANIMALS
SW WHITE, JA ANGUS, RJ MCRITCHIE, WL PORGES
undefined | BLACKWELL SCIENCE | Published : 1974
Abstract
1 NON-DIRECTIONAL DOPPLER FLOWMETER HAS BEEN EVALUATED FOR CHRONIC USE AS A VOLUME FLOWMETER ON THE VESSELS OF SMALL LABORATORY ANIMALS.WITH MODIFICATION OF THE FREQUENCY-TO-VOLTAGE CONVERTER CIRCUIT, THE OUTPUT SIGNAL (BLOOD VELOCITY) IS A LINEAR FUNCTION OF FLOW RATE OVER PHYSIOLOGICAL RANGES OF FLOW, BOTH IN A PUMPPERFUSION CIRCUIT, AND IN VIVO.PROVIDED THAT TRANSDUCERS ARE IMPLANTED ON PERIPHERAL ARTERIES OF ANIMALS FOR TWO WEEKS OR LONGER, LINEARITY BETWEEN DOPPLER SIGNAL AND FLOW RATE IS UNAFFECTED BY MARKED CHANGES IN HAEMATOCRIT OR INTRAVASCULAR PRESSURE.(A)