Nephrectomy pain was higher. erector spina plan block and transversus abdominis plan block had shown to be effective in abdominal surgeries. This study aimed to compare these two bloc analgesic efficacy in laparoscopic nephrectomy patients. The primary aim is postoperative morphine consumption.

Patients ASA 18-65 who will undergo laparoscopic nephrectomy are included in this prospective randomized clinical trial. Patients will be divided into two groups; erector spina and transversus abdominis plane block. Anesthesia will. induced with propofol, fentanyl, and rocuronium will be administered for muscle relaxation. Bispectral index monitoring will be used for monitorisation of the depth of anesthesia. Remifentanil was used during the whole procedure. the amount of consumption will be recorded. Patient-controlled device will be used with morphine. The postoperative morphine consumption will also be recorded.

Inclusion Criteria:

• 18-65 age
• patients undergoing laparoscopic nephrectomy
• ASA 1-3

Exclusion Criteria:

• <18- >65 < age
• patients undergoing open nephrectomy
• ASA 4-5

Participants will not know which block was administered outcome assessors will not know which block was administered