Comparison of Posterior QLB and QIPB in Pediatric Undescended Testis Surgery.

NCT07426796 | Recruiting

• 1 other identifier: 150, 22.01.2026
• Study Type: interventional
• Target: 70
• Locations: 1 country
• Sites: 1

Brief Summary

This randomized, double-blind study compares the postoperative analgesic efficacy of ultrasound-guided Posterior Quadratus Lumborum Block (QLB) versus Quadroiliac Plane Block (QIPB) in pediatric patients aged 1-7 years undergoing unilateral undescended testis surgery.

Conditions

Postoperative Pain; Cryptorchidism

Outcome Measures

Primary Outcomes (1)

• Postoperative Pain Score (FLACC) at 12 Hours

  Pain severity assessed using the Face, Legs, Activity, Cry, Consolability (FLACC) scale. The total score ranges from 0 to 10, where higher scores indicate worse pain.

  12 hours post-surgery.

Secondary Outcomes (4)

• Time to First Rescue Analgesic Request.

  Up to 24 hours.

• Total Postoperative Analgesic Consumption

  24 hours post-surgery.

• Incidence of Postoperative Complications.

  Up to 24 hours.

• Postoperative Pain Scores (FLACC) at Other Time Points.

  30 minutes, 1, 2, 4, 6, and 24 hours post-surgery.

Study Arms (2)

Posterior QLB Group

EXPERIMENTAL

Patients will be placed in the lateral decubitus position. Under ultrasound guidance, the probe will be placed at the posterior axillary line. The needle will be advanced to the posterior fascial plane of the quadratus lumborum muscle. A total of 0.5 mL/kg of 0.25% Bupivacaine will be injected

Procedure: Ultrasound-guided Posterior Quadratus Lumborum Block.

QIPB Group

EXPERIMENTAL

Patients will be placed in the lateral decubitus position. Under ultrasound guidance, the probe will be placed at the level of the iliac crest. The needle will be targeted to the plane where the quadratus lumborum muscle attaches to the iliac bone. A total of 0.5 mL/kg of 0.25% Bupivacaine will be injected.

Procedure: Ultrasound-guided Quadroiliac Plane Block

Interventions

Ultrasound-guided Posterior Quadratus Lumborum Block. PROCEDURE

Patients will be placed in the lateral decubitus position. Under ultrasound guidance, the probe will be placed at the posterior axillary line. The needle will be advanced to the posterior fascial plane of the quadratus lumborum muscle. A total of 0.5 mL/kg of 0.25% Bupivacaine will be injected.

Posterior QLB Group

Ultrasound-guided Quadroiliac Plane Block PROCEDURE

Patients will be placed in the lateral decubitus position. Under ultrasound guidance, the probe will be placed at the level of the iliac crest. The needle will be targeted to the plane where the quadratus lumborum muscle attaches to the iliac bone. A total of 0.5 mL/kg of 0.25% Bupivacaine will be injected

QIPB Group

Eligibility Criteria

• Age: 1 Year - 7 Years
• Sex: male
• Healthy Volunteers: No
• Age Groups: Child (0-17)

You may qualify if:

• Male pediatric patients aged 1-7 years.
• ASA physical status I or II.
• Scheduled for unilateral undescended testis surgery.
• Written informed consent obtained.

You may not qualify if:

• History of neurological deficit or developmental delay.
• Bleeding diathesis or known coagulopathy.
• History of allergy to local anesthetics.
• Infection or skin lesion at the block injection site.
• Congenital spinal anomaly.
• Mental retardation or psychiatric history.
• Liver or kidney dysfunction.

Sponsors & Collaborators

• Medipol University: lead
• Biruni University: collaborator
• Prof. Dr. Cemil Tascıoglu Education and Research Hospital Organization: collaborator

Study Sites (1)

Istanbul Medipol University

Istanbul, Turkey (Türkiye)

RECRUITING

MeSH Terms

Conditions

Pain, Postoperative; Cryptorchidism

Condition Hierarchy (Ancestors)

Postoperative Complications; Pathologic Processes; Pathological Conditions, Signs and Symptoms; Pain; Neurologic Manifestations; Signs and Symptoms; Testicular Diseases; Genital Diseases, Male; Genital Diseases; Urogenital Diseases; Male Urogenital Diseases; Urogenital Abnormalities; Congenital Abnormalities; Congenital, Hereditary, and Neonatal Diseases and Abnormalities; Gonadal Disorders; Endocrine System Diseases

Study Officials

• Selçuk Alver

  Biruni University

  STUDY CHAIR

• Volkan Özen

  Prof. Dr. Cemil Tascioglu City Hospital, Istanbul.

  STUDY CHAIR

Central Study Contacts

Burak Ömür

CONTACT

+905056215056; bomur@medipol.edu.tr

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, CARE PROVIDER, OUTCOMES ASSESSOR
• Purpose: SUPPORTIVE CARE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: assistant professor

Study Record Dates

• First Submitted: February 15, 2026
• First Posted: February 23, 2026
• Study Start: February 13, 2026
• Primary Completion: April 1, 2026
• Study Completion: May 1, 2026
• Last Updated: March 5, 2026

Record last verified: 2026-03

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)