Complications are common during endotracheal intubation of critically ill adults. Manual
ventilation between induction and intubation ("bag-valve-mask" ventilation) has been proposed
as a means of preventing hypoxemia, the most common complication of intubation outside the
operating room. Safety and efficacy data, however, are lacking. PreVent is a randomized trial
comparing manual ventilation between induction and laryngoscopy to no manual ventilation
between induction an laryngoscopy during endotracheal intubation of critically ill adults.
The primary efficacy endpoint will be the lowest arterial oxygen saturation. The primary
safety endpoints will be the lowest oxygen saturation, highest fraction of inspired oxygen,
and highest positive end-expiratory pressure in the 24 hours after the procedure.