Comparison of Two General Anesthesia Maintenance Strategies on Intraoperative Visibility During Arthroscopic Rotator Cuff Surgery: A Randomized Trial

Inclusion Criteria: 1. Patient aged 18 or over 2. Patient scheduled for elective rotator cuff repair arthroscopy (RCRA), performed in the "beach-chair" position under general anesthesia combined with an interscalene block (with or without standard associated procedures such as acromioplasty and/or tenotomy/tenodesis of the long biceps). Procedures for instability (Bankart/Latarjet), fractures, capsulitis, simple lavage, or any arthroscopy not focused on rotator cuff repair (RCR) are not eligible. 3. Patient with an ASA score of I to IV 4. Patient affiliated to a social security scheme, 5. Patient having given written consent following written and oral information. Exclusion Criteria: 1. Patients with a contraindication to any of the study agents, including known hypersensitivity or allergy to any of these agents or to any of their excipients. 2. Patients with known coagulopathy (abnormal PT/INR; platelets \< 100,000/L) or 3. Patients with active preoperative hemarthrosis or local infection. 4. Non-elective (emergency) surgery or a procedure whose initial objective is not rotator cuff repair arthroscopy (RCRA). Note: Intraoperative conversion to open surgery is not an exclusion criterion; it will be considered an intraoperative event and managed in the analysis according to the intention-to-treat (ITT) principle, with a sensitivity analysis procedure described in the statistical plan. 5. Uncooperative patient, inability to consent 6. Pregnant women 7. Patient protected by law under guardianship or curatorship, or unable to participate in a clinical study under article L. 1121-16 of the French Public Health Code.