Endotracheal intubation in a ramped versus supine position in the emergency department: A randomised crossover manikin study

Abstract

Background: Performing endotracheal intubation by placing patients in a ramped position has been shown to improve the ease of intubation and to reduce complications. The above findings, however, were only established in the operation theatre and intensive care settings. Objective: In order to establish the findings in the setting of the emergency department, we attempt to compare the ramped versus supine positions in normal and difficult airway scenarios. Methods: Medical doctors practicing at a local Accident and Emergency Department were recruited into a crossover randomised study. They were asked to perform intubations on a manikin in four scenarios. The manikin was put in a ramp or supine position. In addition, the manikin settings were adjusted to normal and difficult airways. Results: A total of 39 Accident and Emergency Department doctors were recruited. There was no statistically significant difference in the first-attempt success rates using the ramped position compared to supine position in either airway scenario (100% vs. 97.4%, P = 1 in normal airway, 79.5% vs. 74.4%, P = 0.789 in difficult airway). The mean intubation time in difficult airway setting was shorter when the manikin was put into ramped position (28.3 s vs. 38.4 s, P = 0.134). The ramped position improved the glottic view in the difficult airway setting ( P = 0.017). More intubators preferred to place the manikin into a ramped position during difficult airway setting (67%, P = 0.007). Experienced male intubators performed better in normal airway scenarios, whereas Accident and Emergency Department fellows performed better in difficult airway scenarios. Conclusion: The ramped position improves glottic view and operator ease when intubating a simulated difficult airway.