A Systematic Review and Meta-Analysis of Randomized Controlled Trials on Supine vs. Nonsupine Endotracheal Intubation

Table 5

Intubation methods used and degree of semierect position.

Study		Supine vs. Semierect positions
		Intubation method used	Degree of semierect position
Chang et al. [18]	2015	Direct laryngoscopy fiberoptic intubation (fiberoptic bronchoscope (LF-2; Olympus, Tokyo, Japan))	25° semisitting position
Collins et al. [19]	2004	Video laryngoscopy laryngoscope and video Macintosh laryngoscope system (VMS)—Karl Storz Endoscopy—America Inc.	35° for sniff ramped: multiple folded blankets until EAM horizontal with sternal notch; degree not mentioned
Gupta and Russin [20]	2012	Video laryngoscopy (GlideScope)	Semierect angle most comfortable for the patient
Reddy et al. [21]	2016	Laryngoscopy	25° sniffing position (semierect/back-up position)