This prospective observational study aims to evaluate the effect of ultrasound-guided Quadro-Iliac Plane Block (QIPB) on postoperative analgesia in patients undergoing lumbar spinal surgery. Lumbar spinal procedures are commonly associated with significant postoperative pain, which may impair early mobilization and increase opioid consumption. In routine clinical practice, QIPB is increasingly used as part of multimodal analgesia to improve pain control and reduce opioid-related adverse effects.
Adult patients scheduled for elective lumbar spinal surgery under general anesthesia will be followed according to routine clinical care. Postoperative analgesia will be managed with intravenous patient-controlled analgesia (PCA) using tramadol, with or without the addition of ultrasound-guided QIPB, based on the preference of the attending anesthesiologist. No intervention or treatment assignment will be performed by the investigators.
Postoperative pain scores at rest and during movement, opioid consumption, need for rescue analgesics, incidence of nausea and vomiting, and patient satisfaction will be recorded during the first 24 hours after surgery. The findings of this study are expected to provide further clinical evidence regarding the effectiveness of QIPB as part of multimodal analgesia in lumbar spinal surgery.
Patients aged between 18 and 65 years
American Society of Anesthesiologists (ASA) physical status I-III
Body mass index (BMI) <35 kg/m²
Scheduled for elective posterior lumbar spinal instrumentation surgery under general anesthesia
Refusal to participate in the study
Emergency surgery
Local infection or hematoma at the block application site
Previous surgery at the block application site
Adult patients aged 18-65 years with ASA physical status I-III and body mass index \<35 kg/m² scheduled for elective posterior lumbar segmental instrumentation surgery under general anesthesia. All participants provide written informed consent prior to enrollment.
Cohort
Prospective
QIPB
Other interventionQuadro-Iliac Plane Block using local anesthetic.
LAI
Other interventionThe surgeon will perform local anesthetic infiltration (LAI) of the incision site.
Postoperative Pain Intensity
Postoperative pain intensity assessed using the Numeric Rating Scale (NRS), where 0 indicates no pain and 10 indicates the worst imaginable pain.
Total Opioid Consumption
Total amount of tramadol consumption administered via intravenous patient-controlled analgesia during the first 24 hours postoperatively.
Requirement for Rescue Analgesia
Need for additional rescue analgesic medication during the first 24 hours postoperatively.
Postoperative Nausea and Vomiting
Incidence of postoperative nausea and vomiting during the first 24 hours after surgery.
Patient Satisfaction With Pain Management
Patient satisfaction with postoperative pain management was assessed at 24 hours after surgery using a 5-point Likert Satisfaction Scale (range: 1-5), where 1 = "not satisfied at all," 2 = "not satisfied," 3 = "neutral," 4 = "satisfied," and 5 = "very satisfied," with higher scores indicating greater patient satisfaction.
Click on the lead sponsor to view all of their trials.
