Huber F, Wolf J L, Sodal I E, Vanderwerff T J
ISA Trans. 1976;15(2):112-4.
The response of the pulmonary circulation to hypoxia is generally assessed in terms of cardiac output and pulmonary vascular resistance. However, due to pulsatility, the opposition to blood flow can be described accurately only by the input impedance to the pulmonary bed. For assessment of impedance, a system was developed consisting of implantable pressure transducers and an improved muitichannel continuous wave Doppler flow meter. A computer system was used to analyze the data, which was based on power output of the right heart, power dissipation in the pulmonary circulation, and impedance spectra. Data have been obtained from dogs exposed to various levels of acute hypoxia.
肺循环对缺氧的反应通常根据心输出量和肺血管阻力来评估。然而，由于存在脉动性，只有通过肺床的输入阻抗才能准确描述对血流的阻力。为了评估阻抗，开发了一种系统，该系统由植入式压力传感器和改进的多通道连续波多普勒流量计组成。使用计算机系统分析数据，该分析基于右心的功率输出、肺循环中的功率耗散以及阻抗谱。已从暴露于不同程度急性缺氧的狗身上获取了数据。
