Mallampati class, obesity, and a novel airway trajectory measurement to predict difficult laryngoscopy.

Objectives/hypothesis: To determine whether Mallampati class correlates with Cormack-Lehane grade in obese adults, and investigate a novel airway trajectory measurement (ATM) to anticipate difficult laryngoscopy.

Study Design: Retrospective cohort plus a pilot study.

Methods: One hundred eighty-four nonobese and 160 obese adults underwent laryngoscopy.