28 issue 1 compared positive pressure ventilation with a bag mask device bag mask ventilation with no ventilation during tracheal intubation of critically ill. A total of 198 patients 99 5 in the bag mask ventilation group received bag mask ventilation to prevent hypoxemia before the first attempt at laryngoscopy as compared with 5 patients 2 5 in. Providing positive pressure ventilation with a face mask and a bag valve device can be a lifesaving maneuver.
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