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Effect of the Quadratus Lumborum Block Versus the Lumbar Plexus for Spiral Thighplasty Surgery

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

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07280182
Acronym
QLB&LPB
Enrollment
42
Registered
2025-12-12
Start date
2025-12-13
Completion date
2026-03-14
Last updated
2026-03-17

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Analgesia

Keywords

spiral thighplasty , pain , nerve block

Brief summary

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

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

Interventions

OTHERUltrasound-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

OTHERUltrasound-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

Sponsors

Menoufia University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)

Masking description

Computer-generated randomization in variable blocks; allocation sealed in opaque envelopes. Blocks performed by an anesthesiologist not involved in postoperative assessment. Patients and outcome assessors are blinded. Drape and opaque dressings conceal injection sites for both groups to preserve blinding

Intervention model description

Prospective, randomized, parallel-group, double-blind, clinical trial. Primary endpoint: time for first analgesic request postoperatively. Key secondary endpoints: 24-hour opioid consumption (oral morphine equivalents), pain on movement at 6/12/24 hours, time to first ambulation, postoperative nausea/vomiting (PONV), block performance time, and block-related complications. Hypothesis: QLB is non-inferior to LPB for 24-hour pain scores and will yield less motor weakness

Eligibility

Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
No

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.

Design outcomes

Primary

MeasureTime frameDescription
Visual analogue scale score24 hoursVisual 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)

Secondary

MeasureTime frameDescription
Time for first analgesic request24 hoursfirst analgesic request
Opioid consumption24 hourscumulative opioid consumption
Time to walk >30 (meter)24 hourswalk \>30 (meter)
Performance Timeminutesblock performance time
The number of patients who develop block-related complications24 hoursnausea and vomiting , hypotension
the patients Satisfaction questionnaire24 hourspateints are either : Dissatisfied Neither satisfied nor dissatisfied Satisfied Very satisfied

Countries

Egypt

Contacts

STUDY_DIRECTORAMAL G SAFAN, MD

Menoufia University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 18, 2026