Efficacy of Electrical Pudendal Nerve Stimulation and Sacral in Treating Non-obstructive Neurogenic Urinary Retention

Efficacy of Electrical Pudendal Nerve Stimulation and Sacral Neuromodulation in Treating Non-obstructive Neurogenic Urinary Retention: A Comparative Study

To observe the clinical effects and make a comparative study between efficacy of electrical pudendal nerve stimulation (EPNS) and sacral neuromodulation (SNM) , evaluate the advantages of EPNS in the treatment of neurogenic non-obstructive urinary retention, and provide a new method for the treatment of the disease.

Study Overview

Study Type


Enrollment (Estimated)



  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

      • Shanghai, China, 200030
        • Shanghai research institute of acupuncture and meridian

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers



Inclusion Criteria:

  • Non-mechanical obstructive urinary retention occurs following relevant neurological system disorders (spinal cord injury, spina bifida,myelitis, cervical/thoracic disk disease, lesion following spinal anesthesia/spine surgery,lumbar/sacral spine intervertebral disc diseases, spinal stenosis, iatrogenic pelvic nerve lesions, sacral agenesis, peripheral neuropathy due to diabetes mellitus).
  • With normal upper urinary tract function.
  • Other therapies and medications potentially affecting the assessment of this therapy have been discontinued for at least two weeks before the interventional procedure.
  • Patient with good compliance who is capable of cooperating with the follow-up requirements

Exclusion Criteria:

  • Patients with any suprapontine and pontine lesions
  • Pregnant or lactating women
  • Individuals whose symptoms show significant improvement after pharmaceutical and adjunctive therapy
  • Individuals with concurrent acute or chronic prostatitis, prostate cancer, or conditions such as bladder neck stenosis, urethral stricture, or urethral injury
  • High pathological risk factors (e.g., lymph node metastasis, resection margin involvement, bulky tumors)
  • Individuals with concomitant obstructive urinary retention

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: EPNS group
The patient was positioned prone post-micturition. Long needles (0.40 Х 100 mm) were inserted perpendicularly, 1 cm bilateral to the sacrococcygeal joint, to a depth of 80-90 mm, eliciting sensations referred to the urethra or anus. The lower points, 1 cm bilateral to the coccyx tip, received oblique insertion of longer needles (0.40 Х 125 mm) toward the ischiorectal fossa (90-110 mm depth), inducing sensations precisely to the urethra. Connected to a G6805-2 Multi-Purpose Health Device, the ipsilateral needles created an electric loop, with the upper as anode and lower as cathode. Direct electrical stimulation (2.5 Hz, 25~35 mA) for 60 minutes targeted the pudendal nerve, thrice weekly for a total of 4 weeks.
Active Comparator: SNM group
In the prone position, patients undergo sacral nerve root localization through MRI and CT fusion analysis. A 3D-printed sacral foramen puncture template is crafted for precision. Using local anesthesia, a 20G needle at a 60° angle enters the S3 sacral foramen along the template. A temporary stimulator, delivering square waves (14-35 Hz, 210-360 μs), tests motor and sensory responses to confirm accuracy. Self-fixating electrodes are then implanted, validated, and tunneled subcutaneously. External connection to a temporary stimulator provides a 4-week therapeutic experiential stimulation.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Bladder residual urine volume measured by ultrasound
Time Frame: T0 (baseline); T1 (week 2); T2 (week 4)
Bladder residual urine volume measured by ultrasound
T0 (baseline); T1 (week 2); T2 (week 4)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

January 1, 2024

Primary Completion (Estimated)

June 30, 2024

Study Completion (Estimated)

December 31, 2024

Study Registration Dates

First Submitted

November 28, 2023

First Submitted That Met QC Criteria

November 28, 2023

First Posted (Actual)

December 6, 2023

Study Record Updates

Last Update Posted (Actual)

December 6, 2023

Last Update Submitted That Met QC Criteria

November 28, 2023

Last Verified

September 1, 2023

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?


Drug and device information, study documents

Studies a U.S. FDA-regulated drug product


Studies a U.S. FDA-regulated device product


This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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