A breathing circuit disconnection detected by anesthetic agent monitoring

Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie
R R Kennedy, R A French

Abstract

To describe a case involving a spontaneously breathing patient where a circuit disconnection was detected by a change in monitored anesthetic agent parameters. A patient undergoing shoulder surgery was breathing spontaneously from a circle type anesthesia circuit via a laryngeal mask. A disconnection occurred between the heat and moisture exchanger (HME) and the circle system's Y-piece. As the gas sampling port was integrated into the HME a near normal pattern of CO2 continued to be displayed. The disconnection was noted because of a change in the graphical display of the volatile agent concentration. Anesthetic circuit disconnection can be difficult to detect, especially in the spontaneously breathing patient. Capnometry may not detect a disconnection on the machine side of the gas sampling port. Changes in oxygen and volatile agent concentrations may provide an early indication of these types of disconnection.

References

Feb 1, 1989·Journal of Cardiothoracic Anesthesia·C J Murchie, G N Kenny
Jul 1, 1994·British Journal of Anaesthesia·A P Adams
Mar 1, 1994·Journal of Clinical Monitoring·J A Orr, D R Westenskow
Jan 7, 1999·Anaesthesia and Intensive Care·R A French, R R Kennedy
Jul 1, 1999·Journal of Clinical Monitoring and Computing·J S Gravenstein
Feb 13, 2003·Journal of Clinical Monitoring and Computing·G T BlikeK Whalen
Feb 13, 2003·Journal of Clinical Monitoring and Computing·F E BlockB Ballast

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Citations

Oct 19, 2001·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·S Dain
Apr 28, 2004·Anesthesiology·Warren S Sandberg, Sheila Kaiser

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