British Journal of Anaesthesia, 1981, Vol. 53, No. 1 73-76
© 1981 The Board of Management and Trustees of the British Journal of Anaesthesia
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MEASUREMENT OF METABOLIC GAS EXCHANGE DURING ANAESTHESIA
A method using mass spectrometry
Anaesthetic Department, Brompton Hospital Fulham Road, London SW3 6HP
*Present address: Anaesthetic Department, Royal Free Hospital London NW3
Correspondence to M.A.B.
A method is described for measuring metabolic gas exchange during general anaesthesia using a respiratory mass spectrometer, a mixing box and two inert tracer gases. Measurement of inspired and expired minute volume is possible to within 2% oxygen consumption, carbon dioxide output and respiratory quotient can be measured to within 10%.
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