Anatomical Measurements of Pudendal Nerve Block in Children
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Neurostimulation-Guided Pudendal Nerve Block.
- Who it may be relevant to
- Registry conditions: Postoperative Pain Management, Penile Surgery-Related Pain. Basic parameters: 1 year — 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Turkey (Türkiye)
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
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
Overview
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.
Interventions
- 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.
Primary outcome measures
- Horizontal distance from anus to needle insertion point and Depth from skin surface to pudendal nerve [Time frame: During pudendal nerve block procedure]
Eligibility criteria
Inclusion criteria
- Children aged 1-18 years
- Scheduled for penile surgery (e.g., hypospadias, phimosis)
- Planned to receive neurostimulation-guided pudendal nerve block
- Patient and parents/legal guardians willing to participate under general anesthesia
Exclusion criteria
- Patients with incomplete measurement data
- Cases where successful nerve block cannot be performed or nerve stimulation is not detectable at currents ≥1.5 mA
- Patients or parents/legal guardians who refuse pudendal nerve block
- Patients with pelvic deformities or neuromuscular disorders
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Observational model
- Cohort
Study locations
Turkey (Türkiye) · 1 center
- Istanbul University-Cerrahpasa, Cerrahpasa Medicine of Faculty — Bakırköy
Publications
- Kendigelen P, Tutuncu AC, Emre S, Altindas F, Kaya G. Pudendal Versus Caudal Block in Children Undergoing Hypospadias Surgery: A Randomized Controlled Trial. Reg Anesth Pain Med. 2016 Sep-Oct;41(5):610-5. doi: 10.1097/AAP.0000000000000447. PMID 27501015
- Walker BJ, Long JB, Sathyamoorthy M, Birstler J, Wolf C, Bosenberg AT, Flack SH, Krane EJ, Sethna NF, Suresh S, Taenzer AH, Polaner DM, Martin L, Anderson C, Sunder R, Adams T, Martin L, Pankovich M, Sawardekar A, Birmingham P, Marcelino R, Ramarmurthi RJ, Szmuk P, Ungar GK, Lozano S, Boretsky K, Jain R, Matuszczak M, Petersen TR, Dillow J, Power R, Nguyen K, Lee BH, Chan L, Pineda J, Hutchins J, PMID 30074928
Identifiers
NCT: NCT07348029 · ctf- pudental mesafe- 04