Bernstein D P
Crit Care Med. 1986 Oct;14(10):898-901. doi: 10.1097/00003246-198610000-00015.
Thoracic electrical bioimpedance (TEB) is a noninvasive method for the estimation of left ventricular stroke volume (SV). Objections to TEB in the past have included systematic overestimation of SV and cardiac output in normals, poor correlation in absolute terms with standard cardiac output reference techniques, motion and ventilation artifacts which distorted recorded waveforms except when patients remained in apnea during measurements, and lack of a computer to yield rapid heat-to-beat quantitation of SV and cardiac output. The present study entails real-time, beat-to-beat cardiac output determinations using TEB and assessing its agreement via a digital computer against a reference standard, thermodilution. A correlation coefficient of 0.88 is reported with 85% of data points falling within 20% confidence limits on either side of the line of identity.
胸电阻抗（TEB）是一种用于估计左心室每搏输出量（SV）的非侵入性方法。过去对TEB的异议包括：对正常人心室每搏输出量和心输出量的系统性高估；与标准心输出量参考技术的绝对相关性较差；运动和通气伪影会扭曲记录的波形，除非患者在测量过程中保持呼吸暂停；以及缺乏能快速逐搏定量心室每搏输出量和心输出量的计算机。本研究采用TEB进行实时逐搏心输出量测定，并通过数字计算机将其与参考标准热稀释法进行比较以评估其一致性。报告的相关系数为0.88，85%的数据点落在恒等线两侧20%的置信区间内。
