• J Clin Monit Comput · Aug 1998

    A real-time algorithm to improve the response time of a clinical multigas analyser.

    • L Wong, R Hamilton, E Palayiwa, and C Hahn.
    • Nuffield Department of Anaesthetics, University of Oxford, Radcliffe Infirmary, UK.
    • J Clin Monit Comput. 1998 Aug 1; 14 (6): 441-6.

    ObjectiveAn algorithm to improve the response time of a clinical respiratory multigas analyser is presented.MethodsThe algorithm involves the application of a second order differential equation to the analyser gas output signals in real-time. The adjusted analyser output signals are compared with those of a quadrupole respiratory mass spectrometer sampling and analysing simultaneously.ResultsOur results show a close correlation between the adjusted clinical gas analyser and the mass spectrometer signals. Lung volumes derived from a non-invasive sinusoidal inert gas forcing technique, in a model test lung, using the adjusted clinical gas analyser and the mass spectrometer signals demonstrated comparable results.ConclusionsThe algorithm provides an improvement on the relatively slow response times of the clinical gas analyser for breath-by-breath time-dependent applications. The same algorithm can also be applied to other instruments which have slow response times.

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