title: Study challenges standard airway management during cardiac arrests.
mesh_terms: D058109:Airway Management / Q000379:methods* / Q000592:standards; D015331:Cohort Studies; D004632:Emergency Medical Services / Q000379:methods* / Q000592:standards; D006801:Humans; D058687:Out-of-Hospital Cardiac Arrest / Q000628:therapy*; D016896:Treatment Outcome