The identification of a high atropine load of treatment received during hospitalization as a predictor of postoperative confusion could have various benefits:

• Pharmacoepidemiological: identify factors associated with postoperative confusion
• Clinics: by favoring treatments with a low atropine load during anesthesia, the management of patients hospitalized in orthopedics. Similarly, stopping or re-evaluating treatments with a high atropine weight for scheduled surgery is an easy step to take.
• Socio-economic: by reducing the costs related to the occurrence of a confusional syndrome (over-treatment, prolonged hospital stay, loss of autonomy, institutionalization of patients...).

In total, the present study would improve the daily management of hospitalized patients and the practices of clinicians, by offering a decision-making aid.

Inclusion Criteria:

• Admitted to the orthopedic department for surgical management of a fracture of the upper end of the femur in emergency or for the installation of a hip or knee prosthesis
• Patient able to understand and respond to the protocol
• No opposition to the collection of data of the patient or his / her designee

Exclusion Criteria:

• Pre-existing confusion to surgery, detected by the CAM scale
• Serious or moderate head trauma less than three months old
• Removing / installing prosthesis.

The recruitment of patients will be ensured from the consultation of anesthesia or the entry into hospitalization by the anesthesia team of the orthopedic surgery department of the Hospital.