This randomized controlled trial evaluates the effectiveness of ultrasound-guided retrolaminar nerve block in addition to standard multimodal analgesia for postoperative pain management in patients undergoing lumbar spine surgery. Fifty patients will be randomly assigned to receive either the retrolaminar block combined with standard pain management or standard pain management alone. The primary outcome is total opioid consumption in the first 24 hours after surgery. Secondary outcomes include pain intensity at multiple time points, time to first rescue analgesia, duration of sensory block, incidence of postoperative nausea and vomiting, length of hospital stay, patient satisfaction, and chronic pain development at 3 and 6 months follow-up.
Adult patients aged 18-80 years
Scheduled for elective lumbar spine surgery (with instrumentation)
American Society of Anesthesiologists (ASA) physical status I-III
Willing and able to provide written informed consent
Refusal to participate in the study
Known allergy to local anesthetics (bupivacaine - levobupivacaine - lidocaine) or any study medication
Contraindication to regional anesthesia (infection at injection site, coagulopathy)
Chronic opioid use (daily use for >3 months prior to surgery)