Preiser J C, Daper A, Parquier J N, Contempré B, Vincent J L
Department of Intensive Care, Erasme University Hospital, Brussels, Belgium.
Intensive Care Med. 1989;15(4):221-3. doi: 10.1007/BF00271054.
To study the possible influence of mechanical ventilation on the accuracy of thoracic electrical bioimpedance (TEI) in the measurement of cardiac output, we determined cardiac output concurrently by TEI using Kubicek's equation and by thermodilution in 8 acutely ill patients who were mechanically ventilated (assist/control mode) but who had no underlying respiratory failure. Cardiac outputs were lower with TEI than with thermodilution (3.97 +/- 0.80 vs 4.83 +/- 1.16 l/min p = 0.004) and there was poor correlation between the values (r = 0.41). Although there is a need to develop non-invasive techniques to measure cardiac output, the present study indicates that TEI is not reliable in mechanically ventilated patients.
为研究机械通气对胸部电阻抗（TEI）测量心输出量准确性的可能影响，我们采用库比克方程通过TEI和热稀释法同时测定了8例急性病患者的心输出量，这些患者接受机械通气（辅助/控制模式）但无潜在呼吸衰竭。与热稀释法相比，TEI测得的心输出量较低（3.97±0.80对4.83±1.16升/分钟，p = 0.004），且两者数值之间的相关性较差（r = 0.41）。尽管需要开发非侵入性技术来测量心输出量，但本研究表明，TEI在机械通气患者中不可靠。
