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Quantitative Sensory Testing and Analysis of Post Inguinal Hernia Surgery Pain

This study has been completed.
Information provided by (Responsible Party):
University of California, Los Angeles Identifier:
First received: February 13, 2012
Last updated: July 7, 2016
Last verified: July 2016
Increasing experience has identified post-herniorraphy chronic pain as an under-recognized and important complication. Nerve entrapment and injury are recognized as causes of such pain. Operative treatment for selected patients with this condition includes surgical exploration of the affected groin, identification and removal of involved nerves, and removal of meshoma. This procedure has been highly effective in treatment of chronic pain. This study will attempt to subjectively and objectively evaluate the patient's chronic groin pain using quantitative sensory testing (QST) and validated pain scales and questionnaires. Quantitative sensory testing is a method used to assess damage to the small and large nerve fibers. It is used to diagnose and assess the severity of nerve damage, and can also help to determine if a neuropathy is responding to treatment. QST uses a computer testing system to measure how nerves react to vibration and changes in temperature. The procedure is non-invasive and the patient will feel minimal to no discomfort during testing. The hypothesis is that any decrease in subjective pain scores would be accompanied by improved QST results.

Condition Intervention
Hernia Procedure: Quantitative Sensory Testing

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Quantitative Sensory Testing and Neurophysiologic Analysis of Post-Herniorraphy Pain in Patients Undergoing Selective Neurectomy and Mesh Removal

Resource links provided by NLM:

Further study details as provided by University of California, Los Angeles:

Primary Outcome Measures:
  • changes in quantitative sensory testing and neurophysiologic testing pre-operatively, and at 3-month and 6-month intervals post-operatively [ Time Frame: 6 months ]

Secondary Outcome Measures:
  • changes in Visual Nociceptive Pain Scores, McGill Pain Questionnaire, Activity Assessment Scale, and SF-36 scale pre-operatively and 3-month, 6-month, and 9-months post-operatively [ Time Frame: 9 months ]

Enrollment: 10
Study Start Date: February 2011
Study Completion Date: June 2016
Primary Completion Date: January 2016 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
chronic post-herniorraphy pain
patients with severe chronic post-herniorraphy pain
Procedure: Quantitative Sensory Testing
Quantitative Sensory Testing and Neurophysiologic Testing to be done Pre-operatively and at 3 and 6 months post-operatively.

Detailed Description:
Background: Chronic postherniorrhaphy inguinal pain is a complex, major health problem. In the absence of recurrence or meshoma, laparoscopic retroperitoneal triple neurectomy has emerged as an effective surgical treatment of postherniorrhaphy inguinal pain. Methods: This prospective pilot study evaluated the neurophysiological and clinical effects of laparoscopic retroperitoneal triple neurectomy. Ten consecutive adult with chronic postherniorrhaphy inguinal pain and unilateral predominantly neuropathic inguinodynia underwent three comprehensive quantitative sensory testing assessments (preoperative, immediate postoperative, and late postoperative). Pain severity, health-related function, and sleep quality were assessed over the course of a 6-month follow-up period.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Patients with chronic pain occuring after groin hernia repair who are surgical candidates for mesh removal and triple neurectomy.

Inclusion Criteria:

  • patient with chronic groin pain after inguinal hernia surgery and are candidates for triple neurectomy with mesh removal

Exclusion Criteria:

  • non-English speaking patients
  • significant psychiatric or medical disease
  • bilateral groin pain
  Contacts and Locations
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Please refer to this study by its identifier: NCT01534429

United States, California
UCLA Medical Center
Los Angeles, California, United States, 90095
Sponsors and Collaborators
University of California, Los Angeles
Principal Investigator: Andrea L Nicol, M.D. University of California, Los Angeles
  More Information

Responsible Party: University of California, Los Angeles Identifier: NCT01534429     History of Changes
Other Study ID Numbers: 11-000180
Study First Received: February 13, 2012
Last Updated: July 7, 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

Keywords provided by University of California, Los Angeles:

Additional relevant MeSH terms:
Pathological Conditions, Anatomical processed this record on September 21, 2017