This study will evaluate whether ultrasound-guided quadro-iliac plane block provides better postoperative pain control than local infiltration analgesia in patients undergoing single-level lumbar microdiscectomy.
Adult patients scheduled for elective single-level lumbar microdiscectomy will be randomly assigned to receive either bilateral quadro-iliac plane block plus patient-controlled analgesia or local infiltration analgesia plus patient-controlled analgesia. The main outcome of the study will be total fentanyl consumption during the first 24 hours after surgery. Pain scores, need for rescue analgesia, opioid-related side effects, patient satisfaction, and recovery quality will also be evaluated.
Adults aged 18 to 75 years
American Society of Anesthesiologists physical status I to III
Scheduled for elective single-level lumbar microdiscectomy, such as L4-L5 or L5-S1 disc herniation
Planned surgery under general anesthesia
Allergy or hypersensitivity to local anesthetics
Coagulopathy or active anticoagulant use
Infection, scar tissue, or skin lesion at the injection site
Pregnancy or breastfeeding