COMPARISON OF PLAIN BLOCKS FOR POSTOPERATIVE PAIN MANAGEMENT IN GYNECOLOGICAL ABDOMINAL SURGERIES

Patients will be randomly assigned into four groups using a computer-generated randomization method. According to group allocation, patients will receive the following interventions before extubation under ultrasound (US) guidance except control group: Group E (n=20): Bilateral erector spinae plane (ESP) block will be performed with 40 ml of 0.25% bupivacaine (20 ml on each side) at the T12 level, approximately 3-4 cm laterally from the midline, in the neurofascial plane between the transverse processes and the erector spinae muscle. Group Q (n=20): Bilateral quadratus lumborum block (QLB) will be performed with 40 ml of 0.25% bupivacaine (20 ml on each side), placed between the psoas major and quadratus lumborum muscles under US guidance, between the iliac crest and the 12th rib. Group T (n=20): Bilateral transversus abdominis plane (TAP) block will be performed with 40 ml of 0.25% bupivacaine (20 ml on each side) in the neurofascial plane between the internal oblique and transversus abdominis muscles. Group C (Control group, n=20): No block will be applied, only the standard intravenous patient-controlled analgesia (PCA) protocol will be used. The primary aim of this study is to assess the morphine consumption in the postoperative period, while secondary aims include pain score, patient satisfaction, the need for rescue analgesia and side effects