Pediatric cardiology
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Pediatric cardiology · Nov 2008
Comparative StudyComparison of calculated with measured oxygen consumption in children undergoing cardiac catheterization.
Our objective was to compare calculated (LaFarge) with measured oxygen consumption (VO(2)) using the AS/3 TM Compact Airway Module M-CAiOVX (Datex-Ohmeda, Helsinki, Finland; AS/3 TM) in children without cardiac shunts in a prospective, observational study. VO(2) was determined at the end of the routine diagnostic and/or interventional catheterization. VO(2 )was calculated according to the formula of LaFarge and Miettinen for each child and compared with the measured VO(2). ⋯ Bias and precision were 10.0 and 52.5 ml/min, respectively (95% limits of agreement: -42.4 to 62.5 ml/min). We conclude that calculation of VO(2) by the LaFarge formula does not provide reliable values compared to measured values. In clinical routine, measured rather than calculated VO(2) values should be used for the estimation of cardiac output and related variables.