Single-level and Two-level Serratus Posterior Superior Intercostal Plan Block (SPSIPB)

The procedure will be performed with the patient in the prone position in the preoperative period. After the scapula is slightly shifted laterally, the US probe is held sagittally at the upper corner of the scapula spine, and the 3rd rib and the serratus posterior superior muscle will be visualized. In plane technique will be used. The block needle will be advanced in the caudo-cranial direction and entered between the serratus posterior superior and the 3rd rib. The block location will be confirmed by injecting 2 ml of saline between the rib and the muscle. After the block location is confirmed, 20 ml of 0.25% bupivacaine will be used.

In plane technique will be used. The block needle will be advanced in the caudo-cranial direction and inserted between the serratus posterior superior and the 2nd rib. The block location will be confirmed by injecting 2 ml of saline between the rib and the muscle. After the block location is confirmed, 10 ml of 0.25% bupivacaine will be used. Then, the US probe will be held sagittally in the medial part of the scapula spine, and the 4th rib and serratus posterior superior muscle will be visualized. In plane technique will be used. The block needle will be advanced in the caudo-cranial direction and inserted between the serratus posterior superior and the 4th rib. The block location will be confirmed by injecting 2 ml of saline between the rib and the muscle. After the block site is confirmed, 10 ml of 0.25% bupivacaine will be used. A total of 20 ml of 0.25% bupivacaine will be used.