Clinical Research Directory

Inclusion Criteria: * Patient aged \> 18 years; * Patients with score ASA I-IV; * Requiring urgent or planned surgery; * Major surgery (duration of surgery \> 2 hours, requiring a hospital stay of at least 1 night): orthopedics, cardiac, vascular, thoracic, visceral, ENT, plastic surgery; * Handover between two anesthesists defined as a definitive relay between one physician anaesthesist and another in operating room; * Intensive care anesthesists and nurse anaesthetist working in investigator center during the study; * Affiliated to a social security system; * No-opposition to participating to the study. Exclusion Criteria: * Transmission between physician anaesthesist and nurse anaesthetist; * Medical transmission occurs out of anesthesia care out of operating room; * Medical transmission occurs in transitory manner (for example: coffee time, lunch time); * Patients enrolled in an another ongoing study of surgical intervention.