NCT07348029

Anatomical Measurements of Pudendal Nerve Block in Children

Investigation of the Distance of the Needle Entry Point From the Anus and the Depth to Reach the Pudendal Nerve in Pudendal Nerve Block Application in Children

• Status: Not Yet Recruiting
• Phase: —
• Study type: Observational
• Enrollment: 50 (estimated)
• Sponsor: Istanbul University - Cerrahpasa · Academic / Other
• Sex: All
• Age: 1 Year – 18 Years
• Healthy volunteers: Not accepted

Summary

This prospective observational study aims to investigate the relationship between anatomical parameters-specifically the distance from the anus to the needle insertion point and the depth required to reach the pudendal nerve-during neurostimulation-guided pudendal nerve block and patients' age, height, and weight in children undergoing penile surgery.

Detailed description

The pudendal nerve originates from the sacral nerve roots Sacral2-Sacral4 and provides sensory and motor innervation to the penile and perineal regions. Effective postoperative analgesia is essential in pediatric penile surgeries. Pudendal nerve block may provide longer-lasting and more effective analgesia compared to caudal or penile blocks. However, due to age- and size-related anatomical variability in children, data regarding optimal needle insertion distance and depth to reach the pudendal nerve are limited. In this study, neurostimulation will be used to confirm pudendal nerve localization, and anatomical measurements will be analyzed in relation to demographic parameters.

Conditions

• Postoperative Pain Management
• Penile Surgery-Related Pain

Interventions

Type	Name	Description
PROCEDURE	Neurostimulation-Guided Pudendal Nerve Block	Bilateral pudendal nerve block is performed under general anesthesia with neurostimulation guidance. Anatomical measurements, including distance from anus to needle insertion point and nerve depth, are recorded for each patient. Bupivacaine 0.25% is used at 0.25 ml/kg per side, with a maximum total dose of 2 mg/kg.

Timeline

• Start date: 2026-01-20
• Primary completion: 2026-05-20
• Completion: 2026-06-10
• First posted: 2026-01-16
• Last updated: 2026-01-16

Locations

1 site across 1 country: Turkey (Türkiye)