Comparison of OSTAP and EOIP Blocks in Laparoscopic Cholecystectomies

Patients will be divided into two groups, and general anesthesia will be administered to all. Before extubation, one group will receive an external oblique intercostal nerve block, while the other group will receive an oblique subcostal transversus abdominis plane block. The randomization of the study will be carried out by a computer-generated randomization code (computer-generated) by a physician who will not be involved in patient follow-up. The interfascial plane block (either external oblique intercostal block or oblique subcostal block) will be provided to an anesthesiologist in a sealed envelope by an independent assistant staff member outside the study. The patient will not be aware of which block is applied. The anesthesiologist performing the block will not participate in the pain follow-up of the patients. Postoperative pain assessment and data collection will be conducted by another anesthesiologist unaware of the study.

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

Inclusion criteria

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

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