Importance It is unclear whether advanced airway management such as endotracheal
intubation or use of supraglottic airway devices in the prehospital setting improves
outcomes following out-of-hospital cardiac arrest (OHCA) compared with conventional
bag-valve-mask ventilation.
Objective To test the hypothesis that prehospital advanced airway management is
associated with favorable outcome after adult OHCA.
Design, Setting, and Participants Prospective, nationwide, population-based study
(All-Japan Utstein Registry) involving 649 654 consecutive adult patients in Japan who
had an OHCA and in whom resuscitation was attempted by emergency responders with
subsequent transport to medical institutions from January 2005 through December 2010.