• L F Bach, H Wanner-Olsen, B N Andersen, I K Madsen, and S Kruse.
• Department of Anaesthesiology, Viborg Hospital, Denmark.
• Acta Anaesthesiol Scand. 1996 Nov 1; 40 (10): 1238-41.

BackgroundContinuous end-tidal carbon dioxide (ETCO2) monitoring during normofrequent jet-ventilation (NFJV) has not previously been successful and no correspondence between ETCO2 and arterial carbon dioxide (PaCO2) demonstrated.MethodsDuring NFJV jet-ventilation in 19 healthy volunteers, continuous ETCO2 was measured and compared to PaCO2 values. The original ETCO2 sampling line from our Datex CO2 measuring equipment was placed longitudinally against a suction catheter and both were wrapped with aluminium foil. They were placed 4-5 cm above the carina and the position was verified with a fiberoptic bronchoscope.ResultsThe correlation between methods gave a Pearson's product moment correlation (r value) of 0.836, significant at the P < 0.001 level, indicating a close correlation between methods. A difference against mean scatter diagram confirmed that ETCO2 and PaCO2 measurements are of equal value in monitoring healthy patients during NFJV.ConclusionA valuable method of continuous ETCO2 monitoring during NFJV is presented.

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