PMID- 8167281
OWN - NLM
STAT- MEDLINE
DCOM- 19940601
LR  - 20220318
IS  - 1053-0770 (Print)
IS  - 1053-0770 (Linking)
VI  - 8
IP  - 1
DP  - 1994 Feb
TI  - Intraoperative cardiac output monitoring: comparison of impedance cardiography 
      and thermodilution.
PG  - 24-9
AB  - Impedance cardiography (IC) is a noninvasive, simple to use method of cardiac 
      output (CO) determination. A prospective evaluation of IC monitoring was 
      performed in 50 patients undergoing noncardiac surgery. IC CO measurements 
      (NC-COM3-Revision 7, BoMed Manufacturing) were compared to simultaneous 
      measurements of thermodilution (TD) CO to assess the validity of this technique 
      for intraoperative cardiac monitoring. Adequate impedance signals could not be 
      obtained in 7 of the 50 patients. IC CO measurements were highly correlated to TD 
      CO (P < .005), with a correlation coefficient r = 0.84. Bias analysis, however, 
      indicated clinically significant disagreement between the two techniques. IC CO 
      tended to underestimate TD CO (mean bias = -0.41 L/min) and the SD of the bias 
      was 1.0 L/min (95% level of agreement 1.6 to -2.4 L/min). Trending data showed IC 
      to accurately track the direction of TD CO changes but to underestimate their 
      magnitude (r = 0.60, intercept -0.7 L/min, slope 0.47). Factors that may have 
      impaired the performance of IC in this study include the high prevalence of 
      cardiac disease in the study population and electrical noise in the operative 
      setting. Further development of IC appears warranted if it is to prove useful as 
      an intraoperative cardiac monitor.
FAU - Perrino, A C Jr
AU  - Perrino AC Jr
AD  - Department of Anesthesiology, Yale University School of Medicine, New Haven, CT 
      06510.
FAU - Lippman, A
AU  - Lippman A
FAU - Ariyan, C
AU  - Ariyan C
FAU - O'Connor, T Z
AU  - O'Connor TZ
FAU - Luther, M
AU  - Luther M
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - United States
TA  - J Cardiothorac Vasc Anesth
JT  - Journal of cardiothoracic and vascular anesthesia
JID - 9110208
SB  - IM
MH  - Aged
MH  - Bias
MH  - *Cardiac Output
MH  - *Cardiography, Impedance/instrumentation/statistics & numerical data
MH  - Catheterization
MH  - Coronary Disease/physiopathology
MH  - Electrocardiography
MH  - Humans
MH  - *Monitoring, Intraoperative/instrumentation
MH  - Prospective Studies
MH  - Pulmonary Artery
MH  - ROC Curve
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
MH  - Signal Processing, Computer-Assisted
MH  - Stroke Volume
MH  - *Thermodilution/instrumentation/statistics & numerical data
EDAT- 1994/02/01 00:00
MHDA- 2001/03/28 10:01
CRDT- 1994/02/01 00:00
PHST- 1994/02/01 00:00 [pubmed]
PHST- 2001/03/28 10:01 [medline]
PHST- 1994/02/01 00:00 [entrez]
AID - 1053-0770(94)90007-8 [pii]
AID - 10.1016/1053-0770(94)90007-8 [doi]
PST - ppublish
SO  - J Cardiothorac Vasc Anesth. 1994 Feb;8(1):24-9. doi: 
      10.1016/1053-0770(94)90007-8.