1. More on ramped position and 25-degree head up positions
K.B. Greenland 
British Journal of Anaesthesia 
Volume 117, Issue 5, Pages (November 2016)
DOI: /bja/aew325
Copyright © 2016 The Author(s) Terms and Conditions

2. Fig 1
Airway configurations outlined over midline sagittal MRI images in different head and neck positions (Note: author’s MRI images used). Airway configurations in the neutral and 25-degree head up positions are identical in shape but rotated 25degrees anticlockwise. Airway configuration in the sniffing position is rotated anticlockwise but the oro-glotto-tracheal curve has some flattening.
British Journal of Anaesthesia  , DOI: ( /bja/aew325)
Copyright © 2016 The Author(s) Terms and Conditions