Quadro-Iliac vs Thoracolumbar Interfascial Plane Block for Analgesia After Single-Level Lumbar Disc Surgery
Acute Pain · Spinal Stenosis
What this study involves
The registry does not currently label this study as recruiting. Ask about its status before planning a screening visit.
- Study type
- Interventional
- Phase
- Not applicable
- Age range
- 18 years - 70 years
- Sex eligible
- All sexes
- Healthy volunteers
- Not accepted
- Participants
- 70 Actual
These are starting points, not an eligibility decision. The research team must review the full requirements.
About the research
The investigators aim to compare the postoperative analgesic efficacy of the classical thoracolumbar interfascial plane block and the Quadro-iliac plane block for postoperative analgesia management after lumbar disc surgery.
Read the full description
Lumbar spinal stenosis can lead to variable signs and symptoms such as back pain, radiating pain to the lower extremities, and reduced walking capacity. Lumbar disc surgery itself causes significant pain due to extensive dissection and muscle retraction during the procedure. A multimodal analgesic approach is preferred for postoperative pain management after lumbar spine surgery. The addition of regional anesthesia techniques can reduce opioid-related side effects and is associated with earlier mobilization, shorter hospital stay, and improved patient satisfaction.
For patients undergoing lumbar disc surgery, the classical thoracolumbar interfascial plane (TLIP) block and the Quadro-iliac plane block (QIPB) provide effective analgesia for postoperative pain control.
Who may be able to participate?
The list below is the sponsor’s full registry wording. It can include conditions, prior treatment, test results and other requirements. A match in search does not mean you qualify.
Inclusion Criteria:
- Patients aged 18-70 years,
- Classified as ASA physical status I-III,
- Scheduled to undergo single-level lumbar spinal surgery under general anesthesia
- Who agree to participate in the study by providing written informed consent
Exclusion Criteria:
- History of bleeding diathesis or current anticoagulant therapy
- Known allergy or hypersensitivity to local anesthetics or opioid medications
- Infection at the planned block injection site
- Previous lumbar spine surgery
- History of gabapentinoid or corticosteroid use within the last 3 weeks
- Inability to use a patient-controlled analgesia (PCA) device
- Suspected pregnancy, confirmed pregnancy, or breastfeeding
- Refusal to undergo the procedure or to participate in the study
Treatment, groups and participation
The registry may describe treatments and study duration without a complete visit calendar. Ask the study team for the exact schedule, procedures, risks, costs and alternatives. Keep your usual care plan unless your treating clinician tells you otherwise.
- Assignment
- Random assignment
- Masking
- Double masked
Active Comparator: Group QİPB
The Quadro-iliac plane block will be performed 30 minutes before lumbar spine surgery
Other: Quadro-iliac plane block
Active Comparator: Group TLİP
The classical thoracolumbar interfascial plane (TLIP) block will be performed 30 minutes before lumbar spine surgery.
Other: Classical thoracolumbar interfascial plane block
Quadro-iliac plane block OTHER
Quadro-iliac plane block will be performed under ultrasound guidance before the induction of general anesthesia.
Classical thoracolumbar interfascial plane block OTHER
Classical thoracolumbar interfascial plane block will be performed under ultrasound guidance before the induction of general anesthesia.
What researchers are measuring
Outcome measures describe what is being studied. They are not proof that a treatment works.
Primary measures
Opioid consumption
Time frame: 24 hours
In the postoperative period, patients will be given opioids according to their pain density with a patient-controlled device, and the daily Morphine consumption in Patient Controlled Analgesia device will be collected and compared between groups.
Secondary measures
Perioperative pain intensity
Time frame: 24 hours
Changes in the Numerical Rating Scale (NRS) will be recorded at rest and during movement. The participant's baseline NRS will be recorded, followed by measurements before and after neuraxial positioning and up to 24 hours post-surgery.
The NRS is a unidimensional measure of pain intensity in adults. It is a segmented numerical version of the Visual Analog Scale (VAS) where the participant selects a whole number (0-10) that best represents the intensity of their pain. The 11-point numerical scale ranges from '0' representing one end of the pain spectrum (e.g. 'no pain') to '10' representing the other end (e.g. 'worst imaginable pain').
Postoperative nausea and vomiting
Time frame: 24 hours
Postoperative nausea and vomiting (PONV):
During follow-up, patients who experience nausea or vomiting will be evaluated using a verbal descriptive PONV scale (0=None, 1=Mild nausea, 2=Moderate nausea, 3=Single episode of vomiting, 4=More than one episode of vomiting).
Quality of recovery 15 scale
Time frame: 24 hours after surgery
Postoperative Quality of Recovery 15 in Turkish scale. The QoR-15 (Quality of Recovery-15) questionnaire is a simple and practical tool used to assess postoperative recovery.
It consists of 15 items, each scored on a numeric scale from 0 to 10, resulting in a total score ranging from 0 to 150.
Based on the total score, postoperative recovery is categorized as follows:
136-150: Excellent recovery
122-135: Good recovery
90-121: Moderate recovery
0-89: Poor recovery
Review the complete result tables and limitations in the official record.
Open official results ↗Research locations (1)
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1 locations
Samsun UniversitySamsun, Turkey (Türkiye)Status unknown
Study team and timeline
- Lead sponsor
- Samsun University
- Study start
- Jan 6, 2026 Actual
- Primary completion
- Jul 12, 2026 Actual
- Study completion
- Jul 20, 2026 Actual
- First posted
- Jan 16, 2026 Actual
- Last updated
- Nov 10, 2026 Actual
Official study contacts
No central contact is listed. Check the locations and the official record.
Official study title
Comparison of the Postoperative Analgesic Efficacy of the Quadro-Iliac Plane Block and the Classical Thoracolumbar Interfascial Plane Block in Single-Level Lumbar Disc Surgery: A Prospective Randomized Controlled Trial
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Source: ClinicalTrials.gov API v2. Information is submitted by sponsors and investigators. NLM does not approve the safety or science of all listed studies. Registry disclaimer.
Retrieved: Nov 12, 2026 · Last registry update: Nov 10, 2026