Living donor liver transplantation has become a common treatment option for patients with end-stage liver disease. Donor hepatectomy is associated with significant postoperative pain due to inverted L-shaped incision. Therefore adequate analgesia is important for recovery.

Erector Spinae Plane Block (ESPB) is a safe anesthesia technique used to provide postoperative analgesia. This study aimed to compare the novel ultrasound-guided ESPB technique with controls in terms of postoperative opioid consumption and postoperative pain control on donor patients.

Inclusion Criteria:

• Donor patients scheduled for elective hepatectomy in liver transplantation surgery
• ASA I-II
• Patients who are aged between 18-65

Exclusion Criteria:

• Patients who do not accept the procedure
• Skin infection at the site of Erector Spina Plan Block area
• Coagulation disorder or using anticoagulant drugs
• Known local anesthetics and opioid allergy
• Severe pulmonary and/or cardiovascular problems
• Substance addiction or known psychiatric or mental problems
• Chronic painkiller usage
• Pregnancy or lactation

The patient and the anesthesiologist who performs postoperative pain evaluation will not know the group.