Patterson R P, Witsoe D A, From A
University of Minnesota, Minneapolis 55455, USA.
Ann N Y Acad Sci. 1999 Apr 20;873:143-8. doi: 10.1111/j.1749-6632.1999.tb09461.x.
Stroke volumes measured by impedance were compared with values obtained by dye dilution and an electromagnetic flowmeter (EMF) on 14 dogs during drug-induced changes in cardiac contraction strength and peripheral resistance changes. Grouping all data for a total of 305 points showed correlations between dye and EMF, dye and impedance, and EMF and impedance of 0.89, 0.68, and 0.72, respectively. Correlations for individual dogs between dye and EMF, dye and impedance, and EMF and impedance ranged from 0.60 to 0.99, -0.39 to 0.96, and -0.26 to 0.89, respectively. These data suggest that the use of impedance cardiac output measurements to make treatment decisions about individual patients could result in serious error.
在14只狗身上，通过阻抗测量的每搏输出量与通过染料稀释法和电磁流量计（EMF）获得的值进行了比较，这些狗处于药物诱导的心脏收缩力变化和外周阻力变化过程中。将总共305个点的所有数据分组后显示，染料法与电磁流量计法之间、染料法与阻抗法之间以及电磁流量计法与阻抗法之间的相关性分别为0.89、0.68和0.72。每只狗的染料法与电磁流量计法之间、染料法与阻抗法之间以及电磁流量计法与阻抗法之间的相关性分别在0.60至0.99、-0.39至0.96和-0.26至0.89之间。这些数据表明，使用阻抗心输出量测量来为个体患者做出治疗决策可能会导致严重错误。
