This prospective randomized double-blind study was planned in 36 adult female patients aged 18-75 years, with ASA I-III, who underwent elective open gynecological surgery under general anesthesia with lower midline or Pfannenstiel incision after Ataturk University Medical Faculty Hospital ethics committee approval and written consent of the patients.
The aim of this study is to compare the effectiveness of standard epidural and dural puncture epidural analgesia techniques used under NOL guidance.~The primary aim of this study was to evaluate the effect of NOL-guided antinociception on intraoperative total local anesthetic consumption during anesthesia.~The secondary aim is to compare onset time, analgesia duration time, hemodynamic parameters, time to first postoperative analgesic requirement, and postoperative side effects.