Inclusion Criteria:  Patients undergoing ENT or OMS surgery that require general anesthesia with tracheal intubation (either DL, VL or ATI) Age ≥ 18 years  Exclusion Criteria:  Denial of consent Planned intubation technique is not designated in the study protocol as it differs from either DL, VL, ATI (e.g. primary tracheotomy or rigid bronchoscopy)