Matsievskiĭ D D
Biull Eksp Biol Med. 1993 Aug;116(8):144-7.
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.
采用血管内探头测量大鼠主动脉内的血流速度。超声探头固定在直径为0.6毫米的聚乙烯管末端。微型压电晶体工作频率为33兆赫。同时，用置于升主动脉的袖带探头测量心输出量。在静态实验中，它们之间的相关系数为0.96。心输出量过程的动态变化是由血管活性药物注射和窒息引起的。血管内探头与袖带探头血流参数的差异为6% - 9%，每搏输出量为4% - 6%，心输出量为5% - 7%。在10例实验中，将血管内探头植入清醒大鼠的升主动脉进行血流动力学研究。
