Airway Management Study in Physician Manned Helicopter Emergency Medical Services

Inclusion Criteria: * All patients requiring and receiving prehospital advanced airway management on HEMS primary missions. * Advanced airway management is defined as the attempted insertion of an advanced airway adjunct (including endotracheal intubation, alternative airways, and surgical airway /cricothyroidectomy) or the administration of ventilatory assistance/support (including bag-mask ventilation-BMV, BIPAP/CPAP or other ventilatory support). * Advanced prehospital advanced airway management is further defined as any airway management beyond manual opening of the airway and use of simple airway adjuncts, such as a Guedel airway or supplemental oxygen Exclusion Criteria: * Patients receiving advanced airway management during so-called secondary missions (or inter-hospital transfer).