Ultrasound-Guided Oblique Subcostal Transversus Abdominis Plane Block For Patients Undergoing Laparoscopic Hysterectomy: A Prospective Randomized Controlled Study

Abstract

Objective: Laparoscopic hysterectomy increases patient comfort in terms of postoperative pain. However, many patients struggle with postoperative pain after laparoscopic operations. This study aims to evaluate the postoperative analgesic efficacy of oblique subcostal transversus abdominis plane (OSTAP) block in laparoscopic hysterectomy operations. Methods: 58 female patients aged between 18 and 65, with the American Society of Anesthesiologists (ASA) physical status I-II, were recruited in this randomized controlled study. In the OSTAP group, a block was applied with 0.25% bupivacaine. For postoperative analgesia, 1gr paracetamol and 100mg tramadol were administered intravenously (IV) to all patients. No additional procedure was applied to the control group (Group C). The amount of postoperative analgesic consumption, time to first analgesic requirement and visual analog scale (VAS) scores of the patients were evaluated. Results: The mean 24-hour tramadol consumption of the patients was 58.62±48.22 mg in the OSTAP group, while it was 165.52±93.640 mg in Group C (p