[Emergency vehicles].
D000402:Airway Obstruction / Q000628:therapy; D002404:Catheterization / Q000295:instrumentation; D004630:Emergencies; D004638:Emergency Treatment / Q000295:instrumentation*; D006801:Humans; D007440:Intubation / Q000295:instrumentation; D012121:Respiration, Artificial / Q000295:instrumentation