After the patients are monitored, they will be operated under general anesthesia without peripheral nerve block and intraoperative intravenous analgesics (dexketoprofen 50 mg, paracetamol) will be given.

In this study, the intervention will be the SPSIPB. The block will be performed with the patient in the lateral decubitus position.A high-frequency (7-12 MHz) linear transducer will be placed in the transverse plane at the level of the spina scapulae, and the superior medial border of the scapula, the trapezius muscle, the rhomboid muscle, the serratus posterior superior muscle (SPSM), and the second and third ribs will be visualized.

Subsequently, a sonovisible needle will be advanced just medial to the scapula, targeting the area between the second and third ribs to reach the fascial plane between the SPSM and the intercostal muscles. After the needle makes gentle contact with the rib, 1-2 mL of saline will be used to confirm the correct plane. A total of 30 mL of 0.25% bupivacaine will then be administered into this fascial plane between the SPSM and the intercostal muscle.In the intraoperative period, intravenous analgesics (dexketoprofen 50 mg, paracetamol 1000 mg) will be given.

In the postoperative period a ibuprofen dose of 400 mg every 8 hours were administered iv for multimodal analgesia

Numerical rating scale is used for pain assessment. The scores of the numerical rating scale changes between 0 to 10 points. 10 points mean "the most severe pain that the patient ever had". 0 point means "there is no pain." Higher scores mean worse outcome.

Postoperative total analgesic need was recorded as "milligram" in unit.

Quality of recovery-15 (QoR15) scale was used for the assessment of patients satisfaction. The scores of QoR15 changes between 0 to 150 points. 0 point means "there is no satisfaction." Higher scores mean indicating a good quality of recovery and better outcome.