The overall objective of the study is to evaluate and analyze major and minor incidents during airway management in adults under anaesthesia care at all study sites. The patient characteristics, type of airway management is recorded and if airway management-related incidents occur, they are analyzed in more detail to improve patient safety in the future.

It is a prospective observational cross-sectional European multi-centre study collecting health-related patient data on anaesthetic airway management over three months. This detects the incidence and nature of local airway management problems and assesses how they are solved. This will enable the investigators to identify generalisable interventions and recommendations to further improve patients' airway management to improve patient safety. During the observational period, the anaesthesia staff in charge will fill out a screening questionnaire for airway management for every patient undergoing anaesthesia care with airway management. The investigators will extract the characteristics from the local anaesthesia record system for all patients. If no event arises, there are no further requirements. If an event occurs, the anaesthesia provider will fill out an additional form asking for more details on what happened.

Inclusion Criteria:

• All adult patients requiring airway management under anaesthesia care for elective, semi-elective, urgent or emergency diagnostic procedures or interventions. Airway management includes awake and asleep tracheal intubation, insertion of supraglottic airway devices, and face mask ventilation.
• Patients older than 18 years of age
• Informed consent given or general consent in place, according to local ethics committee requirements.

Exclusion Criteria:

• Refusal to give consent or withdrawal of consent.
• Patients <18 years.

All adult patients (<18 years of age) that undergo in-hospital airway management under anaesthesia care who do not object to the use of their data collected for the purpose of this study.