Improving agreement between thoracic bioimpedance and dye dilution cardiac output estimation in children

O'Connell, A. J., Tibballs, J. and Coulthard, M. (1991) Improving agreement between thoracic bioimpedance and dye dilution cardiac output estimation in children. Anaesthesia and Intensive Care, 19 3: 434-440.

Author O'Connell, A. J.
Tibballs, J.
Coulthard, M.
Title Improving agreement between thoracic bioimpedance and dye dilution cardiac output estimation in children
Journal name Anaesthesia and Intensive Care   Check publisher's open access policy
ISSN 0310-057X
1448-0271
Publication date 1991-08
Sub-type Article (original research)
Volume 19
Issue 3
Start page 434
End page 440
Total pages 7
Place of publication Edgecliff, NSW, Australia
Publisher Australian Society of Anaesthetists
Language eng
Abstract The measurement of thoracic electrical bioimpedance (TEB) offers a continuous, non-invasive method for monitoring cardiac output (CO). For clinical use, agreement with a current standard should be demonstrated. We describe a modification to the manufacturer's suggested data entry into the NCCOM3-R6 TEB monitor (BoMed Medical Manufacturing), which results in improved agreement with indocyanine green dye dilution (DD) CO estimation in paediatric patients. The manufacturer's instructions for teh NCCOM3-R6 include an estimation of the volume of electrically participating thoracic tissue (VEPT) based on body weight. We also estimated the VEPT from direct anatomical measurement of thoracic length and circumference. The mean difference between paired DD and TEB CO using the manufacturer's weight-based instructions was 0.69 l/min with 95% confidence limits 2.34 to -0.96 l/min. The mean difference between the two CO techniques using our calculated VEPT was 0.35 l/min with 95% confidence limits 1.50 to -0.80 l/min. The linear regression correlation coefficient between the two techniques was 0.88 using VEPT estimated from the manufacturer's instructions and 0.94 using our calculated VEPT from measurement of thoracic dimensions. The range of DD CO was 0.41 to 8.35 l/min.
Keyword Heart function
Cardiac output
Thoracic electrical impedance
Child
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Medicine Publications
 
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Created: Thu, 02 Jun 2011, 10:12:10 EST by Melanie Thomas on behalf of Paediatrics & Child Health - RBWH