Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Lack of agreement between bioimpedance and continuous thermodilution measurement of cardiac output in intensive care unit patients. | Barry et al. Critical Care 1997 1 71 http c CRITICAL CARE RESEARCH Open Access Lack of agreement between bioimpedance and continuous thermodilution measurement of cardiac output in intensive care unit patients Ben N Barry1 Abhiram Mallick1 Andrew R Bodenham2 Michael Vucevic1 Abstract Background Bolus thermodilution is the standard bedside method of cardiac output measurement in the intensive care unit ICU . The Baxter Vigilance monitor uses a modified thermodilution pulmonary artery catheter with a thermal filament to give a continuous read-out of cardiac output. This has been shown to correlate very well with both the gold standard dye dilution method and the bolus thermodilution method. Bioimpedance cardiography using the Bomed NCCOM 3 offers a noninvasive means of continuous cardiac output measurement and has been shown to correlate with the bolus thermodilution method. We investigated the agreement between the continuous bioimpedance and continuous thermodilution methods enabling acquisition of a large number of simultaneous measurements. Results A total of 2390 paired data points from seven patients were collected. There was no correlation r2 between the methods. The precision l min m2 of agreement between the Vigilance and the Bomed assessed by the Bland-Altam method was very poor although the bias l min m2 appeared fair. Conclusions The Bomed NCCOM 3 bioimpedance monitor shows poor agreement with the Baxter Vigilance continuous thermodilution monitor in a group of general ICU patients and cannot be recommended for cardiac output monitoring in this situation. measurement techniques impedance cardiography thermodilution monitoring cardiac output Introduction The fluid bolus thermodilution method of cardiac output measurement using a pulmonary artery catheter PAC has gained wide acceptance over the past 25 years. The advantages and disadvantages of the use of this method of monitoring critically ill patients are well established 1 .
