Spinal Magnetic Stimulation in Neuropathic Pain

Study Overview
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Brief Summary
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It involves delivering a train of magnetic pulses, 5 at each time, to the brain. In the present study, we are using the same method to treat severe pain due to nerve conditions. You will be given up to 1000 pulses in total over the spine in the lower back (Spinal Magnetic Stimulation or SMS). Each train will be given in 10-second intervals. You will have SMS on a single day. You will be given SMS pulses at 1 or 10 per second. No stimulation will be given over the head. You will be assessed before and after the study for up to 1 week. Your usual medical treatment will be continued

Detailed Description
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You must be aware of that this is a placebo-controlled trial. This means that you may either receive real SMS or sham SMS. The latter involves a harmless process of ineffective stimulation, designed for comparison with real SMS. Whether you receive either form of treatment will be assigned randomly, and there will be a 50% chance of being assigned to either.

Official Title
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A Randomized Placebo-controlled Trial on the Use of Repetitive Spinal Magnetic Stimulation as a Therapeutic Option in Patients With Intractable Neuropathic Pain of the Lower Limbs

Conditions
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Neuropathic Pain

Intervention / Treatment
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* Device: magnetic stimulation
* Device: Magnetic Stimulation with tilted coil


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: All with neuropathic lower limb pain Exclusion Criteria: Contraindications to magnetic stimulation

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Magnetic Stimulation<br> | Device: magnetic stimulation<br>* SMS was delivered with a repetitive magnetic stimulator connected to a figure of eight coil capable of delivering a maximum output of 2 Tesla per pulse. The coil measured 90 mm in each wing and was centered over the surface landmark corresponding to the cauda equina region. SMS was performed with the patient lying comfortably in the prone position and a soft pillow supported the lower abdomen. The coil was placed flat over the back with the handle pointing cranially. Each patient on active treatment received 200 trains of 5 pulses delivered at 10 Hz, at an interval of 5 s between each train. As this was a pilot study, each only received 1000 pulses in a single session.<br>|
| Placebo Comparator: Magnetic Stimulation with tilted coil<br>Magnetic Stimulation with tilted coil | Device: Magnetic Stimulation with tilted coil<br>* The placebo arm consisted of 'sham' SMS delivered with the coil angled vertically and one of the wing edges in contact with the stimulation point. As this coil type allows maximum magnetic flux at the center of the intersection, we believe minimum or no stimulation was effected at the edge of the coil in contact with the patient. Stimulation parameters and duration were unchanged in this arm.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Subjective pain score measurements | NAS score | 4 days | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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magnetic stimulation, neuropathic pain, spinal, lower limb, clinical trial