An interventional study of Ultrasound-guided Posterior Quadratus Lumborum Block. and Ultrasound-guided Quadroiliac Plane Block in Postoperative Pain and Cryptorchidism, sponsored by Medipol University. Completed at 1 site in Turkey (Türkiye). Open to male participants aged 1 Year to 7 Years. Per ClinicalTrials.gov, last updated 2026-09-03.
Sponsored by Medipol University · Not applicable, Interventional, and Supportive care
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.
Lower abdominal surgeries, such as undescended testis repair (orchiopexy), are common in pediatric patients and can cause significant postoperative pain. While Posterior Quadratus Lumborum Block (QLB) is a known technique for somatic and visceral analgesia, the Quadroiliac Plane Block (QIPB) is a newer approach targeting the fascial plane posterior to the iliac bone.
In this prospective, randomized, controlled trial, 70 pediatric patients (ASA I-II, aged 1-7 years) will be randomly assigned to receive either a Posterior QLB or a QIPB under general anesthesia. Both blocks will be performed using ultrasound guidance with 0.5 mL/kg of 0.25% bupivacaine.
The study aims to evaluate and compare the analgesic efficacy of these two techniques. Postoperative pain will be assessed using the FLACC scale. Secondary objectives include comparing the time to first rescue analgesic, total analgesic consumption, and incidence of complications.
5,640 studies on the registry are indexed under Pain, Postoperative; 1,230 are open to participants now.
This study's enrollment of 70 is close to the median of 75 across 4,821 interventional studies indexed under Pain, Postoperative.
Browse Pain, Postoperative studies →Medipol University is the lead sponsor of 326 studies on the registry; 88 are open to participants now.
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
ASA physical status
The anaesthetists’ scale of health before surgery: I is healthy, II has a mild illness that is under control, III a severe one, IV a severe illness that is a constant threat to life. V and VI are used for the critically ill and for organ donors.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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.
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
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.
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
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.
Time frame: 12 hours post-surgery.
Time to First Rescue Analgesic Request.
Time in minutes from surgery completion to the first dose of rescue analgesia.
Time frame: Up to 24 hours.
Total Postoperative Analgesic Consumption
Cumulative amount of rescue analgesics consumed (mg).
Time frame: 24 hours post-surgery.
Incidence of Postoperative Complications.
Assessment of complications such as urinary retention, motor block, hematoma, or ecchymosis at the injection site.
Time frame: Up to 24 hours.
Postoperative Pain Scores (FLACC) at Other Time Points.
Pain severity assessed using the Face, Legs, Activity, Cry, Consolability (FLACC) scale at 30 minutes, 1, 2, 4, 6, and 24 hours. The total score ranges from 0 to 10, where higher scores indicate worse pain.
Time frame: 30 minutes, 1, 2, 4, 6, and 24 hours post-surgery.
Plan to share: No
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This study is completed, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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