Serratus Posterior Superior Intekcostal Plane Block vs Serratus Anterior Plane Block for Postoperative Analgesia in VATS: A Randomized Trial"

The patients will be divided into two groups and all will receive general anesthesia. Before extubation, one group will receive a Serratus Anterior Plane Block, and the other group will receive a Serratus Posterior Superior Intercostal Plane Block. The randomization of the study will be performed by a physician who will not be involved in the patient follow-up, using a computer-generated randomization code (generated by the computer). The interfascial plane block (Serratus Anterior Plane Block or Serratus Posterior Superior Intercostal Plane Block) will be given to the anesthesiologist in a sealed envelope by an independent assistant personnel outside the study. The patient will not be aware of which block is being applied. The anesthesiologist performing the block will not participate in the patients' pain monitoring. Postoperative pain assessment and data collection will be performed by another anesthesiologist who is unaware of the study.

For standardization purposes, the block procedure will be performed by an experienced anesthesiologist who has performed at least 20 successful and uncomplicated procedures before.

Inclusion criteria

• BMI < 35 kg/m² Patients with ASA scores I, II, III

Exclusion criteria

• Patients who do not want to be included in the study Psychiatric and neurological disease with blurred consciousness Patients with ASA > 3 BMI > 35 kg/m² Abnormality in coagulation parameters History of allergy to local anesthetic drugs Infection at the injection site Patients whose surgical procedure time exceeds 150 minutes