Effect of the Quadratus Lumborum Block Versus the Lumbar Plexus for Spiral Thighplasty Surgery (QLB&LPB)

Comparing the Early Postoperative Analgesic Effect of the Transmuscular Quadratus Lumborum Block Versus the Lumbar Plexus Block for Patients Undergoing Spiral Thighplasty Surgery

Whether trans muscular QLB provides postoperative analgesia compared with LPB after thigh lift surgery

Study Overview

• Status: Completed
• Conditions: Analgesia
• Intervention / Treatment: Other: Ultrasound-Guided Trans-muscular QLB; Other: Ultrasound-Guided Posterior Lumbar Plexus (Psoas Compartment) Block

Detailed Description

Adequate analgesia after spiral thigh reduction (thigh lift) is essential for early mobilization and patient satisfaction. Quadratus lumborum block (QLB) has shown analgesic efficacy comparable to lumbar plexus block (LPB) for hip area surgery with potential advantages in motor-sparing and safety

• Study Type: Interventional
• Enrollment (Actual): 42
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Egypt
  • Shibin El Kom
    • Cairo, Shibin El Kom, Egypt, 32511
      • Faculty of medicine,Menofia university hospitals

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• ASA ( American Society of Anaesthesia) I-II
• elective bilateral spiral thigh lift under general anesthesia
• consent to regional block and trial participation

Exclusion Criteria:

• Coagulopathy or therapeutic anticoagulation not meeting ASRA safety windows
• infection at injection sites
• allergy to local anesthetics
• preexisting significant neuropathy
• BMI > 35 kg/m² if impeding ultrasound visualization; renal/hepatic failure; pregnancy; inability to use NRS; chronic opioid use >60 mg oral morphine equivalents/day; contraindication to study analgesics.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Other
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Other: Group QLB; Ultrasound-Guided Trans-muscular QLB	Other: Ultrasound-Guided Trans-muscular QLB; With the patient lateral decubitus position, a low-frequency curvilinear probe in the 'Shamrock' view at L2-L4. In-plane posterior-to-anterior needle advancement through the Quadratus lumborum to the interfascial plane anterior to QL and posterior to Psoas major. Inject 30 mL Bupivacaine 0.25% after negative aspiration and hydrodissection to confirm proper spread . Then the patient will be turned to the other side, and the block will be done with the same technique
Other: Group LPB; Ultrasound-Guided Posterior Lumbar Plexus (Psoas Compartment) Block	Other: Ultrasound-Guided Posterior Lumbar Plexus (Psoas Compartment) Block; Lateral decubitus, Shamrock view to identify the Psoas compartment; in-plane needle advancement to the Psoas compartment adjacent to the transverse process. Inject 30 mL of Bupivacaine 0.25% in 5 mL increments, aspirating frequently. This will be done in the same position for both sides

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Visual analogue scale score	Visual analogue scale score at 1st,6th,12th and 24 h (where 0 is interpreted as no pain, 1-4 mild pain, 5-6 moderate pain, 7-10 severe pain)	24 hours

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Time for first analgesic request	first analgesic request	24 hours
Opioid consumption	cumulative opioid consumption	24 hours
Time to walk >30 (meter)	walk >30 (meter)	24 hours
Performance Time	block performance time	minutes
The number of patients who develop block-related complications	nausea and vomiting , hypotension	24 hours
the patients Satisfaction questionnaire	pateints are either : Dissatisfied Neither satisfied nor dissatisfied Satisfied Very satisfied	24 hours

Collaborators and Investigators

• Sponsor: Menoufia University
• Investigators: Study Director: AMAL G SAFAN, MD, Menoufia University

Study record dates

Study Major Dates

• Study Start (Actual): December 13, 2025
• Primary Completion (Actual): February 28, 2026
• Study Completion (Actual): March 14, 2026

Study Registration Dates

• First Submitted: November 28, 2025
• First Submitted That Met QC Criteria: December 11, 2025
• First Posted (Actual): December 12, 2025

Study Record Updates

• Last Update Posted (Actual): March 17, 2026
• Last Update Submitted That Met QC Criteria: March 15, 2026
• Last Verified: March 1, 2026

More Information

Terms related to this study

• Keywords: spiral thighplasty , pain , nerve block
• Additional Relevant MeSH Terms: Neurologic Manifestations; Nervous System Diseases; Neurobehavioral Manifestations; Perceptual Disorders; Pathological Conditions, Signs and Symptoms; Signs and Symptoms; Pain; Agnosia; Digestive System and Oral Physiological Phenomena; Dentistry; Dental Physiological Phenomena; Dental Occlusion
• Other Study ID Numbers: 11/2025ANET2; Menoufia University (Registry Identifier: Faculty of medicine)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No