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Clinical Trial Summary

Objectives : To investigate the analgesic effects of repeated sessions of unilateral rTMS in patients with chronic pain syndrome due to fibromyalgia, IBS or burning mouth syndrome. Primary outcome will be numerical pain scores.

Methods : The study will be randomized and performed in parallel groups and double blind versus sham stimulation, and will include 90 patients (45 patients per treatment arm). The randomization will be computerized and performed for each aetiological group separately. The rTMS will be performed on the left motor cortex, 5 consecutive days , then once a week during 3 weeks then twice a month during 2 months, then once a month during 6 months. Clinical assessment will include an assessment of pain, quality of life, sleep, depression and anxiety, catastrophizing, and a neuropsychological evaluation.

Conclusion : this study should allow to determine for the first time the long term efficacy and safety of rTMS in the treatment of dysfunctional or idiopathic chronic pain syndromes which are often refractory to conventional treatments.


Clinical Trial Description

Several lines of evidence suggest that fibromyalgia syndrome, Irritable Bowel syndrome (IBS) and burning mouth syndrome are chronic pain disorders affecting pain modulation. Repetitive transcranial magnetic stimulation (rTMS) is a recent, safe and non-invasive technique for stimulating the cerebral cortex, which has recently been reported to induce short term analgesic effects in patients with chronic focal pain. We have also recently shown in a double blind randomized trial, that rTMS could have short term analgesic effects in patients with fibromyalgia.

Objectives : Our aim is to investigate the long term analgesic effects of repeated sessions of unilateral rTMS in patients with chronic pain syndrome due to fibromyalgia, IBS or burning mouth syndrome. Primary outcome will be numerical pain scores on brief pain inventory at each visit.

Methods : This study will be randomized and performed in parallel groups and double blind versus sham stimulation. It will include at least 30 patients per pain disorder, ie 90 patients. Randomization will be computerized and performed for each of the aetiological groups separately (ie, there will be 3 distinct randomization procedures for fibromyalgia, IBS and stomatodynia);. Stimulation will be applied to the right motor area corresponding to the contralateral hand. The treatment will consist in a first period of 5 consecutive days of stimulation, followed by a stimulation once a week during 3 weeks then a stimulation twice a month during 2 months then stimulation once a month during 3 additional months. Clinical assessment will be performed at baseline, then at day 1, 5, weeks 3, 5, 7, 9, 13 and 25. It will include depending on the visits an assessment of pain intensity and characteristics, quality of life, sleep, depression and anxiety, catastrophizing, and a brief neuropsychological evaluation (focusing on memory, attention and vigilance). In patients with fibromyalgia, the evaluation will also include specifically the number of tender points. In patients with IBS, evaluation of bowel dysfunction will also be performed.

Conclusion : This study should allow to determine for the first time the long term efficacy and safety of rTMS in the treatment of dysfunctional or idiopathic chronic pain syndromes which are often refractory to conventional treatments. ;


Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT00374673
Study type Interventional
Source Hospital Ambroise Paré Paris
Contact
Status Completed
Phase Phase 3
Start date October 2006
Completion date April 2012

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