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

摘要: 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 pilot study. Methods One hundred eighty-four nonobese 160 adults underwent laryngoscopy. Spearman correlations, gamma coefficients (G), Kendall's τ investigated body mass index (BMI):Mallampati, BMI: Cormack-Lehane, Mallampati:Cormack-Lehane. A z test compared the two groups. Twenty-six volunteers had neck x-rays taken sniffing position examine trajectories larynges (ATM). Results Positive predictive value of high for laryngoscopy was 8.57%. BMI did not correlate (r = 0.055 [nonobese], r = −0.056 [obese]) or [r = −0.014 r = −0.022 [obese]). Among BMI:Mallampati 0.039 (P = .63), BMI:Cormack-Lehane 0.02 (P = .85), Mallampati:Cormack-Lehane 0.43 (P = .004). −0.127 (P = .16), 0.014 (P = .88), 0.365 (P = .01). were comparable all analyses. When comparing among obese, z = 0.04 (P = .98). In ATM study, only upper lip bite significant relationship (G = 1.00, P < .001). Conclusions Mallampati poorly regardless BMI. Pilot data suggest that is feasible. Level Evidence 4. Laryngoscope, 125:161–166, 2015