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  • Title: Evaluation of a multigas anaesthetic monitor: the Datex Capnomac.
    Author: McPeak H, Palayiwa E, Madgwick R, Sykes MK.
    Journal: Anaesthesia; 1988 Dec; 43(12):1035-41. PubMed ID: 3148284.
    Abstract:
    A laboratory investigation was carried out to evaluate the performance of the Datex Capnomac multigas anaesthetic agent analyser, with particular emphasis on accuracy, response and delay times, zero and gain stability and interference from water vapour. The analysis of anaesthetic vapours was less accurate than the analysis of CO2, O2 and N2O, but acceptable for clinical use. The response to square wave changes in gas composition was accurate at frequencies up to 60 per minute for CO2 and 30 per minute for O2, but with N2O and the anaesthetic vapours there was a decrease in accuracy at frequencies above 20 breaths/minute. The instrument appeared to be unaffected by water vapour.
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