Abstract
Airway management is a major concern to anesthesiologists and can contribute to perioperative mortality & morbidity if not managed in time. About 75-50% of cardiac arrests during general anesthesia are because of difficult intubation that causes inadequate oxygenation and/or ventilation. In this Prospective observational study three variable data viz. Extended Modified Mallampati score, Thyromental height & Neck circumference are obtained from every sample and their effectiveness in predicting a difficult intubation, which is calculated by a score called Intubation Difficulty Score was determined statistically. Our study shows that a combination of Extended modified Mallampati grading and Thyromental height and neck circumference is preferable for assessment of the airway because of its better Specificity and positive predictive value than taken alone. Also the ratio of neck circumference to thyromental height appears to be predicting difficult airway better than individual indices
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