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Clinical Effectiveness of Obturator Externus Muscle Injection in Chronic Pelvic Pain Patients

This study has been completed.
Information provided by (Responsible Party):
Yonsei University Identifier:
First received: February 27, 2013
Last updated: NA
Last verified: February 2013
History: No changes posted
Obturator externus (OE) muscle has the possibility as a pain generator, considering its anatomical and functional aspects, but this muscle as a possible target for therapeutic intervention is currently understudied in pain practice.

Chronic Pelvic Pain

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Retrospective

Resource links provided by NLM:

Further study details as provided by Yonsei University:

Primary Outcome Measures:
  • Post-injection pain score [ Time Frame: at 2 weeks after injection ]
    Before and after the OE muscle injection, patients were asked to rate their pain score using a 10-point numeric rating scale (NRS; 0=no pain, 10=worst possible pain). We also assessed the degree of patient satisfaction as excellent, good, fair, and bad during 2 weeks after injection. In this period, any analgesic medications did not change in all patients. Complications associated with OE muscle injection were investigated.

Enrollment: 23
Study Start Date: March 2012
Study Completion Date: December 2012
Primary Completion Date: December 2012 (Final data collection date for primary outcome measure)
Obturator externus muscle injection
patients were treated with obturator externus injection


Ages Eligible for Study:   20 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
The study population was defined as chronic pelvic pain patients with a localized tenderness on inferolateral side of the pubic tubercle corresponding to obturator foramen who received OE muscle injection with local anesthetic for their pain treatment.

Inclusion Criteria:

  • 1. 20-75 adults/ 2. Chronic pelvic pain patients who required the interventional procedures/ 3. patients with a localized tenderness on inferolateral side of the pubic tubercle

Exclusion Criteria:

  • 1. Severe cardiovascular disease /2. Coagulation abnormality /3. Patient denial
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Please refer to this study by its identifier: NCT01802528

Korea, Republic of
Department of Anesthesiology and Pain Medicine, Anesthesia and Pain Research Institute,
Seoul, Korea, Republic of, 120-752
Sponsors and Collaborators
Yonsei University
  More Information

Responsible Party: Yonsei University Identifier: NCT01802528     History of Changes
Other Study ID Numbers: 4-2012-0924
Study First Received: February 27, 2013
Last Updated: February 27, 2013

Keywords provided by Yonsei University:
obturator externus

Additional relevant MeSH terms:
Pelvic Pain
Neurologic Manifestations
Signs and Symptoms processed this record on September 21, 2017