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本文以家兔为对象,用肝素抗凝后处死,经外接微量泵构成流体力学参量可以人工控制的在体肺循环。在不同流量、压力和阻力的情况下描记血液脉动性流动引起的肺血流图。结果表明,肺血流图波高Hs与肺动脉脉压△p_1、血液脉动流量q有精确的线性关系。波高和脉压间的比例系数则与脉动顺应性,基础阻抗及导体导电容积有关。用并联模型估计波高和脉压间的比例系数,实验值和理论值基本符合。本文还观察了主动脉搏动和血液电阻率对肺血流图信号的影响。
In this paper, rabbits as the object, with heparin anticoagulation after sacrifice, formed by an external micro-pump fluid mechanics parameters can be controlled in the body pulmonary circulation. Tracing the pulsatile flow of blood in the bloodstream under different flow, pressure and resistance conditions. The results showed that the pulmonary blood flow wave height Hs and pulmonary pulse pressure △ p_1, blood pulse flow q has a precise linear relationship. The ratio between wave height and pulse pressure is related to pulsation compliance, base impedance, and conductor conduction volume. The parallel model was used to estimate the ratio coefficient between wave height and pulse pressure, and the experimental and theoretical values were basically consistent. This article also observed the effects of aortic pulsatility and hematologic resistivity on pulmonary blood flow pattern signals.