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.. Introduction: Various anatomical measurements and non‐invasive clinical tests can be performed to predict difficult intubation. Recently introduced “Upper lip bite test” (ULBT) is claimed to have a high predictability. However, limited data exists to support its high predictability both nationally and internationally. Objectives: To determine the diagnostic accuracy of upper lip bite test in the prediction of difficult airway. Study Design: Cross sectional study. Setting: Operation theatres of Sheikh Zayed Hospital Lahore. Period: From March 2014 to Sept 2014. Methodology: A sample of 283 patients was calculated by using WHO sample size calculator and sampling was done by non-probability consecutive sampling. All the selected patients were assessed for upper lip bite test and Cormack and Lehane laryngoscopy grade separately. Data was collected on pre-designed proforma. Accuracy of ULBT was calculated based on the acquired data. Results: The calculated accuracy of ULBT for predicting difficult airway was found to be 91.2%. Conclusion: ULBT is a reliable bedside technique with a high accuracy for predicting a difficult airway.

ACCURACY OF UPPER LIP BITE TEST IN PREDICTING DIFFICULT AIRWAY