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British Journal of Anaesthesia, 1991, Vol. 66, No. 3 305-309
© 1991 The Board of Management and Trustees of the British Journal of Anaesthesia

research-article

COMPARISON OF TWO METHODS FOR PREDICTING DIFFICULT INTUBATION{dagger}

J. D. L. OATES, B.M., D.A.(U.K.), F.F.A.R.C.S.I., A. D. MACLEOD, M.B., CH.B., M.SC, F.C.ANAES., P. D. OATES, M.B., CH.B., D.A.(U.K.), F.F.A.R.C.S.I., F. J. PEARSALL, M.B., CH.B., D.A.(U.K.), J. C. HOWIE, B.SC.(HONS), M.B., CH.B., M.R.C.P., F.C.ANAES. and G. D. MURRAY, M.A., PH.D.

Department of Anaesthetics Victoria Infirmary, Glasgow G42 9TY
Medical Statistics Unit, Department of Surgery Western Infirmary, Glasgow G11 6NT

Correspondence to J.D.L.O.

Two methods of predicting difficult laryngos-copy were compared prospectively. Mallampati class and Wilson risk-sum were determined before operation and laryngeal view graded in 675 patients. Both tests identified five of 12 difficult laryngoscopies; twice as many patients were predicted to be difficult by Mallampati classification than by Wilson risk-sum. Interobserver variation was minimal using Wilson risk-sum, but considerable for Mallampati classification. We prefer the Wilson risk-sum for assessment of the airway, while noting that both tests have poor sensitivities.

{dagger} Presented in part to the Scottish Society of Anaesthetists, Peebles, April 1990.


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