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经肺动脉导管(PAC)采用温度稀释技术可测定心输出量(CO),通过PAC向右房注入定量冷溶液,经距PAC末端4cm处的热敏电阻单臂电桥阻抗可探测肺动脉血液温度的变化,通过计算机算出温度稀释曲线下面积,结合注入液体的容积可推算出CO。除温度稀释再循环量很小以外(约为曲线峰值的4%),此曲线的形状与染料稀释曲线相似。温度稀释曲线上升很快,紧接呈指数
Pulmonary artery catheter (PAC) using the temperature dilution technique can be measured cardiac output (CO), through the PAC to the right injection of quantitative cold solution, 4cm away from the end of the PAC thermistor single arm bridge impedance can detect pulmonary artery blood temperature Change, calculate the area under the temperature dilution curve by the computer, CO can be calculated in combination with the volume of liquid injected. The shape of this curve is similar to that of the dye dilution curve, except for a very small amount of recirculation temperature dilution (about 4% of the peak value of the curve). The temperature dilution curve rises rapidly, followed by an exponential