[Correlation between Predictive Index of Difficult Intubation and Cormack].

Background: More than 600 people die each year in developed countries from complications at the time of orotracheal intubation. Studies have shown that all predictors used so far have low ability to predict difficult airway. When analyzing this ability, both clinical suspicion, indirect laryngoscopy and even the different individual examinations showed predictive values higher than 80%.