Factors associated with first-pass success of emergency endotracheal intubation

Endotracheal intubation is frequently performed in emergency departments (EDs). First-pass success is important because repeated attempts are associated with poor outcomes. We sought to identify factors associated with first-pass success in emergency endotracheal intubation.

We analyzed emergency orotracheal intubations on adult patients in an ED located in South Korea from Jan. 2013 to Dec. 2016. Various operator-, procedure- and patient-related factors were screened with univariable logistic regression. Using variables with P-values less than 0.2, a multiple logistic regression model was constructed to identify independent predictors.

There were 1154 eligible cases. First-pass success was achieved in 974 (84.4%) cases. Among operator-related factors, clinical experience (OR: 2.93, 5.26, 3.80 and 5.71; 95% CI: 1.62-5.26, 2.80-9.84, 1.81-8.13 and 2.07-18.67 for PGY 3, 4 and 5 residents and EM specialists, respectively, relative to PGY 2 residents) and physician based outside the ED (OR: 0.10; 95% CI: 0.04-0.25) were independently associated with first-pass success. There was no statistically or clinically significant difference for first-pass success rate as determined by operator's gender (83.6% for female vs. 84.8% for male; 95% CI for difference: -3.1% to 5.8%). Among patient-related factors, restricted mouth opening (OR: 0.47; 95% CI: 0.31-0.72), restricted neck extension (OR: 0.57; 95% CI: 0.39-0.85) and swollen tongue (OR: 0.46; 95% CI: 0.28-0.77) were independent predictors of first-pass success.

Operator characteristics, including clinical experience and working department, and patient characteristics, including restricted mouth opening, restricted neck extension and swollen tongue, were independent predictors of first-pass success in emergency endotracheal intubation.