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    J Biomed Eng. 1992 Mar;14(2):147-52.

    Measurement of breath-by-breath gas exchange during general anaesthesia using a single pneumotachograph.

    Source

    North Western Department of Medical Physics, University Hospital of South Manchester, UK.

    Abstract

    A breath-by-breath gas exchange measurement system using a single pneumotachograph suitable for use during general anaesthesia is described. The system's accuracy has been assessed by a combination of error sensitivity analysis, laboratory testing of the component measurements used to calculate gas exchange and measurements on volunteers and patients. The system is shown to have a mean accuracy of +/- 2.6 ml breath-1 for VCO2 measurements, +/- 7.12 ml breath-1 for VO2 and +/- 5.55 ml breath-1 for VN2O measurement. The application of a lung gas stores correction using argon improved between breath variability by 50%.

    PMID:
    1564922
    [PubMed - indexed for MEDLINE]

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