PMID- 16868348
OWN - NLM
STAT- MEDLINE
DCOM- 20061120
LR  - 20191210
IS  - 0967-3334 (Print)
IS  - 0967-3334 (Linking)
VI  - 27
IP  - 9
DP  - 2006 Sep
TI  - Impedance cardiography revisited.
PG  - 817-27
AB  - Previously reported comparisons between cardiac output (CO) results in patients 
      with cardiac conditions measured by thoracic impedance cardiography (TIC) versus 
      thermodilution (TD) reveal upper and lower limits of agreement with two standard 
      deviations (2SD) of approximately +/-2.2 l min(-1), a 44% disparity between the 
      two technologies. We show here that if the electrodes are placed on one wrist and 
      on a contralateral ankle instead of on the chest, a configuration designated as 
      regional impedance cardiography (RIC), the 2SD limit of agreement between RIC and 
      TD is +/-1.0 l min(-1), approximately 20% disparity between the two methods. To 
      compare the performances of the TIC and RIC algorithms, the raw data of 
      peripheral impedance changes yielded by RIC in 43 cardiac patients were used here 
      for software processing and calculating the CO with the TIC algorithm. The 2SD 
      between the TIC and TD was +/-1.7 l min(-1), and after annexing the correcting 
      factors of the RIC formula to the TIC formula, the disparity between TIC and TD 
      further declined to +/-1.25 l min(-1). CONCLUSIONS: (1) in cardiac conditions, 
      the RIC technology is twice as accurate as TIC; (2) the advantage of RIC is the 
      use of peripheral rather than thoracic impedance signals, supported by correcting 
      factors.
FAU - Cotter, G
AU  - Cotter G
AD  - Division of Clinical Pharmacology, Duke University Medical Center, Durham, NC, 
      USA. gad.cotter@duke.edu
FAU - Schachner, A
AU  - Schachner A
FAU - Sasson, L
AU  - Sasson L
FAU - Dekel, H
AU  - Dekel H
FAU - Moshkovitz, Y
AU  - Moshkovitz Y
LA  - eng
PT  - Comparative Study
PT  - Evaluation Study
PT  - Journal Article
PT  - Validation Study
DEP - 20060705
PL  - England
TA  - Physiol Meas
JT  - Physiological measurement
JID - 9306921
SB  - IM
MH  - *Algorithms
MH  - *Cardiac Output
MH  - Cardiography, Impedance/*methods
MH  - Diagnosis, Computer-Assisted/*methods
MH  - Humans
MH  - Reproducibility of Results
MH  - Retrospective Studies
MH  - Sensitivity and Specificity
MH  - *Software
EDAT- 2006/07/27 09:00
MHDA- 2006/12/09 09:00
CRDT- 2006/07/27 09:00
PHST- 2006/07/27 09:00 [pubmed]
PHST- 2006/12/09 09:00 [medline]
PHST- 2006/07/27 09:00 [entrez]
AID - S0967-3334(06)18563-9 [pii]
AID - 10.1088/0967-3334/27/9/005 [doi]
PST - ppublish
SO  - Physiol Meas. 2006 Sep;27(9):817-27. doi: 10.1088/0967-3334/27/9/005. Epub 2006 
      Jul 5.