• D Thangathurai, C Charbonnet, P Roessler, C C Wo, M Mikhail, R Yoahida, and W C Shoemaker.
• Department of Anesthesiology, University of Southern California School of Medicine, Los Angeles, USA.
• J. Cardiothorac. Vasc. Anesth. 1997 Jun 1;11(4):440-4.

ObjectivesTo compare a new noninvasive bioimpedance device with the standard thermodilution method during the intraoperative period in high-risk patients undergoing oncological surgery.DesignProspectively collected data with retrospective analysis.SettingThe study was undertaken at a university hospital, single institution.ParticipantsTwenty-three selected adults undergoing extensive, ablative oncological surgery.InterventionsSimultaneous measurements of cardiac output by a new bioimpedance method and the standard thermodilution method during the intraoperative and immediate postoperative periods.Measurements And Main ResultsThe correlation coefficient between the two methods was r = 0.89, p < 0.001. Bias and precision analysis between the two techniques showed a mean bias of 0.1 L/min and SD of the bias [precision] of 1.0 L/min [95% level of agreement +2.1 L/min to -1.9 L/min]. After software enhancement, data from the last 11 monitored patients showed improved correlation between the two methods; r = 0.93, mean bias -0.1 L/min, and precision 0.8 L/min. Electrical and motion-induced interference only transiently impaired the performance of the new impedance method.ConclusionThis new impedance device is a safe, reliable, clinically acceptable alternative to the invasive thermodilution method in the operating room environment.

24 keywords...

hide…