Shoulder surgery can be done not only arthroscopy but also open technic. General or regional anaesthesia can be used at this surgery. Anaesthetic choice can be changed by comorbidity factors, patients or surgeons choice etc. At this study we aimed compare the general and regional anesthesia costs during operating room.

General anesthesia or ultrasound guided brachial plexus blocks (interscalene, superior trunk) can be used during shoulder surgery, as our routine. In this retrospective study, the data of patients who underwent shoulder surgery under regional or general anesthesia between 01 August 2021 and 31 March 2022 (8 months) in the operating room of the Samsun University Education and Research Hospital will be investigated. The characteristics of the patients such as age, presence of additional disease, operation indication, duration of stay in the operating room, and intraoperative medical agents will be recorded. Fees for materials used for general anesthesia and regional anesthesia will be determined. A fixed cost will be determined for the use of the operating room, including the salaries of healthcare workers. After calculating the group costs between both groups, statistical analyzes will be made.

Inclusion Criteria:

• Open shoulder surgery, ASA I, II and III

Exclusion CriteriaS

• shoulder Arthroscopy , used regional anesthesia for only analgesia, American society of Anesthesiologists (ASA) score IV patients, emergency

Shoulder surgery with general anesthesia or regional anesthesia in our hospital between ASA I-II and III group patients will be included in the study