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本文叙述了一种非创伤测量心输出量的方法,在口腔与呼吸机之间辊接一个100ml并联死腔,用计算机控制死腔启闭,死腔接入30秒,正常通气180秒,可循环工作。利用质谱仪、肺流量计及分压传感器的测试数据可得正常通气与部份重呼吸期间的CO_2清除率的变化、潮气末的CO_2压力值及其变化。根据Fick方程的微分形式可导出计算心输出量的公式,而不必测定静脉血的P_(CO_2)。利用计算机每3.5分可计算一次心输出量。本方
This article describes a non-invasive measurement of cardiac output method, a 100ml parallel connection between the mouth and ventilator dead space, the computer control of dead space opening and closing, dead space access for 30 seconds, the normal ventilation for 180 seconds, Cyclic work. Using mass spectrometer, pulmonary flowmeter and partial pressure sensor test data can be obtained during normal ventilation and partial respiration during the removal of CO_2, the end of the tidal pressure CO_2 pressure value and its changes. According to the differential form of the Fick equation, the formula for calculating the cardiac output can be derived without having to measure the P_ (CO_2) of venous blood. Use your computer to calculate cardiac output every 3.5 minutes. This side