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British Journal of Anaesthesia, 1992, Vol. 69, No. 4 346-348
© 1992 The Board of Management and Trustees of the British Journal of Anaesthesia

research-article

EFFECT OF THE LARYNGEAL MASK AIRWAY ON LOWER OESOPHAGEAL SPHINCTER PRESSURE IN PATIENTS DURING GENERAL ANAESTHESIA

P. G. RABEY, M.B. CH.B. F.R.C.ANAES., P. J. MURPHY, M.B. CH.B., D.A. F.R.C.ANAES., J. A. LANGTON, M.B. B.S. F.R.C.ANAES., P. BARKER, M.B. B.S. F.R.C.ANAES. and D. J. ROWBOTHAM, M.B. M.R.C.P. (U.K.)., F.R.C.ANAES.

Department of Anaesthesia, University of Leicester, Leicester Royal Infirmary Leicester LEI 5WW

We have studied the tone of the lower oesophageal sphincter (LOS) in 40 adults undergoing routine body surface surgery and allocated randomly to receive anaesthesia either by face mask and Guedel airway or by laryngeal mask airway. In the laryngeal mask group there was a mean (SEM) decrease in barrier pressure (LOS minus gastric pressure) of 3.6 (1.4) cm H2, compared with a mean increase of 2.2 (1.2) cm H2O in the face mask group (P < 0.005).


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