Arthroscopic shoulder surgery, which has been frequently applied in recent years, provides long-term positive clinical results and increases the quality of life after surgery, while it can cause severe pain in the early postoperative period. Postoperative pain management is very important in shoulder arthroplasty. Adequate pain control; mental state, nutrition, cost of care, rehabilitation, and patient satisfaction, are of great importance for the patients' recovery and contribute to a successful surgical outcome.

In this study, the investigators aimed to compare the effects of suprascapular nerve block and shoulder pericapsular nerve block, which will be performed preoperatively with ultrasound, on the level of postoperative pain in patients who will undergo shoulder arthroscopy surgery under general anesthesia.

As a result of the power analysis the investigators conducted for this study, the minimum sample size was calculated as 32 people for each group, 64 people in total, at the 90% confidence interval.

64 patients who meet the inclusion criteria will be included in our study. The participants will be randomized and divided into 2 groups. Accordingly, the PENG block will be applied to 32 patients, and the suprascapular block will be applied to 32 patients.

Inclusion Criteria:

• Patients who will have shoulder arthroscopy surgery under general anesthesia
• Ages of 18-75
• ASA I-III

Exclusion Criteria:

• Patients with deformity and pathology in the shoulder region
• Patients with known local anesthetic allergy
• Patients with BMI>35
• Patients with alcohol and substance addiction
• Patients with opioid addiction
• Patients who cannot perceive and evaluate pain, such as psychiatric illness, mental retardation

From the date of publication, available data may begin. If requested, the data will be shared with the anesthetists dealing with shoulder blocks.

Two year within the publication date.