Document Detail

Comparison between the Datex-Ohmeda M-COVX metabolic monitor and the Deltatrac II in mechanically ventilated patients.
MedLine Citation:
PMID:  12122524     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To compare the M-COVX and the Deltatrac II metabolic monitors under clinical conditions. DESIGN: Prospective clinical comparison. SETTING: A general Intensive Care Unit of a university hospital. PATIENTS: Twenty mechanically ventilated critically ill patients. INTERVENTIONS: The monitors were compared at FiO(2) 0.3, 0.5, and 0.7 in each patient where possible. MEASUREMENTS AND RESULTS: Pulmonary gas exchange measurements were recorded using the two monitors sequentially (Deltatrac(before), M-COVX, Deltatrac(after)). Each measurement consisted of five consecutive 1-min readings of VO(2) and VCO(2). We compared the Deltatrac(before) with the Deltatrac(after) and the mean of the Deltatrac with the M-COVX. There was no clinically significant bias between the two monitors for VO(2) or VCO(2) but the limits of agreement (LOA) were wide (bias +/-95% LOA: VCO(2) -13 +/- 30 ml/min, -8 +/- 36 ml/min, 7 +/- 50 ml/min; VO(2) -7 +/- 50 ml/min, -5 +/- 56 ml/min, 6 +/- 64 ml/min, at FiO(2) 0.3, 0.5, and 0.7, respectively). The Deltatrac before and after measurements displayed good agreement for VCO(2) but poorer agreement for VO(2) (bias +/- 95% LOA: VCO(2) 0 +/- 18 ml/min, -6 +/- 16 ml/min, -1 +/- 12 ml/min; VO(2) 2 +/- 12 ml/min, 3 +/- 38 ml/min, 10 +/- 42 ml/min, at FiO(2) 0.3, 0.5, and 0.7, respectively). Using within-patient standard deviation as a measure of reproducibility suggested that for VO(2) the M-COVX performed better than the Deltatrac at high FiO(2), and for VCO(2) Deltatrac was better at lower FiO(2). CONCLUSIONS: The M-COVX is a suitable integrated device for measuring metabolic gas exchange in ventilated patients.
S McLellan; T Walsh; A Burdess; A Lee
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2002-06-15
Journal Detail:
Title:  Intensive care medicine     Volume:  28     ISSN:  0342-4642     ISO Abbreviation:  Intensive Care Med     Publication Date:  2002 Jul 
Date Detail:
Created Date:  2002-07-17     Completed Date:  2002-11-29     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7704851     Medline TA:  Intensive Care Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  870-6     Citation Subset:  IM    
Department of Anaesthetics, Critical Care & Pain Medicine, Royal Infirmary of Edinburgh, Edinburgh EH3 9YW, Scotland, UK.
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MeSH Terms
Carbon Dioxide / metabolism
Intensive Care Units
Monitoring, Physiologic / instrumentation*
Oxygen / metabolism
Pulmonary Gas Exchange
Reproducibility of Results
Respiration, Artificial*
Reg. No./Substance:
124-38-9/Carbon Dioxide; 7782-44-7/Oxygen

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