Publication in refereed journal
香港中文大学研究人员 ( 现职)
| 郭志德教授 (麻醉及深切治疗学系) |
全文
| 数位物件识别号 (DOI) http://dx.doi.org/10.1023/A:1016347102209 |
引用次数
Scopushttp://aims.cuhk.edu.hk/converis/portal/Publication/4Scopus source URL
其它资讯
摘要Objectives. To compare the performances of two impedance cardiographs, the RheoCardioMonitor (RCM) and the BoMed NCCOM3, using trend analysis. This involved a series of head-up tilts, a simulation of the stroke volume (SV) and cardiac output (CO) response, calculation of prediction errors and cumulative sums (Cusum). Methods. Eight healthy male volunteers, aged 27-37 years, were tilted on four occasions to angles of 55°, 15°, 30° and 55°, whilst recording SV and CO every 10-sec. Baseline and percentage changes with tilting were calculated. A simulation of the tilt response was constructed, and from this residuals (observed-predicted) and prediction errors ((observed-predicted)/predicted) × 100% were calculated at 10-sec intervals. Trend analysis was performed by multiple analysis of the variance of serial measurements and graphically assessing changes in serial SV prediction errors, using Cusums. Results are presented as mean (range or SD). Results. Baseline values for RCM-SV were 76 (35-9http://aims.cuhk.edu.hk/converis/portal/Publication/4) ml and for CO http://aims.cuhk.edu.hk/converis/portal/Publication/4.7 (2.8-6.1) litre.min-1. For BoMed-SV they were 113 (90-16http://aims.cuhk.edu.hk/converis/portal/Publication/4) ml and for CO 7.2 (5.5-11.9) litre.min-1. Head-up tilting to 55° resulted in a 32 (12)% decrease in RCM-SV and a 21 (11)% decrease in BoMed-SV (p < 0.01). Prediction errors for RCM-SV were (6.5 (http://aims.cuhk.edu.hk/converis/portal/Publication/4.9)%) and for BoMed-SV (6.8 (5.2)%) (p = 0.0http://aims.cuhk.edu.hk/converis/portal/Publication/48). Cusum analysis showed that in 8http://aims.cuhk.edu.hk/converis/portal/Publication/4% of tests, impedance measurements remained within ±10% of the initial calibration. There was no difference between devices (Χ2 = 0.92). Conclusions. Simulation of a physiological response, such as that to head-up tilting, and using a trend analysis based on prediction errors and Cusum, is a useful technique. The trending abilities of the RCM and BoMed were similar.
着者Critchley L.A.H., Zhang Y., Critchley J.A.J.H., Chung R.C.K.
期刊名称Journal of Clinical Monitoring and Computing
出版年份2002
月份8
日期29
卷号17
期次2
出版社Kluwer Academic Publishers
出版地Netherlands
页次153 - 160
国际标準期刊号1387-1307
电子国际标準期刊号1573-261http://aims.cuhk.edu.hk/converis/portal/Publication/4
语言英式英语
关键词Cardiac output, Cusum, Hemodynamic, Impedance cardiography, Tilting, Trend analysis
