[Intravascular measurements of the blood flow in rats].
The blood flow velocity in aorta was measured in rats with intravascular probes. Ultrasonic probes was fixed at the end of polyethylene tubing 0.6 mm in diameter. Miniature piezoelectric crystal worked on 33 MHz frequency. Simultaneously cardiac output were measured with cuff probes placed on ascending aorta. Correlative coefficient between them was 0.96 in static experiments. Dynamics of cardiac output process was caused by injection of vasoactive agents and asphyxia. The difference between intravascular probes and cuff probes blood flow parameters were 6-9%, strike volume 4-6%, cardiac output 5-7%. In ten cases intravascular probes was implanted in ascending aorta for hemodynamics study on conscious rats.
Matsievskiĭ
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D000818:Animals; D001011:Aorta / Q000000981:diagnostic imaging / Q000502:physiology; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging / Q000502:physiology; D001783:Blood Flow Velocity; D001794:Blood Pressure; D001808:Blood Vessels / Q000000981:diagnostic imaging / Q000502:physiology*; D005069:Evaluation Studies as Topic; D005260:Female; D008297:Male; D051381:Rats; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation
Vnutrisosudistye izmereniia krovotoka na krysakh.