Peutrell I, Jennison N. British Journal of Midwifery 2014 May; 22(5): 254-8
Twenty midwives asked to manage newborn resuscitation scenarios on a manikin using two techniques: Bag valve mask with a Guedel, and a bag with an i-gel. Time to first breath quicker with i-gel, no significant difference in duration of inflation breaths. Higher inflation pressures generated with i-gel.
Link to abstract