Abstract

There are many studies on upper airway measurement on Western population. This study aims to know the incidence of difficult intubation in the Northern Indian population and also to determine the validity of bedside tests individually and in combination in predicting difficult intubation. Material and Methods: In this study, 99 patients enrolled aged between 18–60 years of American Society of Anesthesiologists I, II and III, scheduled for surgery under general anesthesia requiring endotracheal intubation. Anaesthesiologist recorded parameters in pre anaesthetic check up of different parameters like Upper Lip Bite Test (ULBT), Sternomental Distance (SMD), Ratio of Height-to-Thyromental Distance (RHTMD), Modified Mallampati Classification (MMC), Dellikans and Calders test.after standard induction laryngoscopy was performed and intubation difficulty level was assessed using intubation difficulty scale (IDS). Results: MMC was found significant with P-value is <0.05 and has higher sensitivity in combination with Dellikan and Calders test. Conclusion: MMC is a better predictor individually or when combined with other tests done at bedside for prediction of difficult laryngoscopy as compared to other tests

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