Clinical evaluation of the accuracy of a new generation bioimpedance cardiac output monitor / 中华麻醉学杂志

ABSTRACT

Objective To evaluate the accuracy of a new generation bioimpedance cardiac output monitor as compared with thermodilution and end expiratory CO 2 techniques Methods Sixteen patients (14 males, 2 females) aged (58?12) years undergoing elective coronary artery bypass (CAB) surgery were studied Cardiac output was measured after CAB surgery in ICU using a new generation bioimpedance cardiac output monitor(Rheo Bioimpedance Hemodynamic monitor) and conventional thermodilution technique in 16 patients and end expiratory CO 2 technique in 10 patients Cardiac output was also measured with Rheo Bioimpedance Hemodynamic monitor in 200 healthy volunteers consisting of equal numbers of male and female The volunteers of each sex were further divided into 5 equal groups of 20 each: (1)20 29 years, (2)30 39 years, (3)40 49 years, (4)50 59 years and (5)60 70 years Results Cardiac outputs measured by bioimpedance and thermodilution techniques were well correlated (r=0 83) and there was also a good correlation between cardiac outputs measured by bioimpedance and end expiratory CO 2 techniques(r=0 88) Cardiac out measured with Rheo Bioimpedance Hemodynamic monitor in 200 healthy volunteers showed that there was a significant difference in cardiac output between 60 70 years age group and the other age groups in both male and female Conclusions Cardiac output and other hemodynamic parameters measured with the new generation bioimpedance hemodynamic monitor are accurate and can be used for preoperative cardiovascular function evaluation and postoperative monitoring of dynamic changes in circulatory function