Comparison of Pain-Related Changes in Cerebral Blood Volume in Burn Patients With Neuropathic Pain

Study Overview
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Brief Summary
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The investigators will observe increased or decreased CBV in patients with thermal injury compared with the CBV in healthy controls.

Detailed Description
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Prevalence of chronic pain has been shown to be high after thermal injury. Post-burn neuropathic pain causes chronic disabilities that is often difficult to treat effectively. To study changes in the pain network associated with neuropathic pain, magnetic resonance imaging(MRI) will be used to evaluate cerebral blood volume(CBV) in patients who was injuried by burn. Over the fifty participants will be recruited. The participants will be comprised 30 subjects with neuropathic pain caused by thermal injury and 20 healthy contols. The 30 patients with neuropathic pain will be comprised divided into 15 electrical injury group and 15 non-electrical burn injury group. The patients are included the patients with severe neuropathic pain that is rated at least 5 on the visual analogue scale (VAS), despite treatments with gabapentin medication and other physical modalities. The intensity of neuropathic pain will be measured using the visual analogue scale(VAS). Depressive mood will be assessed using the Beck Depression Scale. CBV maps will be compared between burn patients and controls. And the relationship between individual participant CBV(measured in voxels), BDS and VAS score will be also examined.

Official Title
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Comparison of Pain-Related Changes in Cerebral Blood Volume in Burn Patients With Neuropathic Pain

Conditions
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Neuropathic Pain

Intervention / Treatment
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* Diagnostic Test: magnetic resonance imaging(MRI)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Burn patients severe neuropatic pain rated at least 5 on the 10-point numerical rating scale (NRS). Exclusion Criteria: cardiac arrest history history of neurologic disease or brain surgery unstable heart disease or presence of a cardiac pacemaker psychiatric disorder diabetes mellitus abnormal renal function contraindication for MRI pregnancy.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Burn patients<br>The subjects complaine of severe neuropathic pain that is rated at least 5 on the visual analogue scale (VAS), despite treatments with gabapentin medication and other physical modalities. | Diagnostic Test: magnetic resonance imaging(MRI)<br>* magnetic resonance imaging(MRI) will be used to evaluate cerebral blood volume(CBV) of pain network<br>|
| Healthy controls<br>age and sex matched healthy controls | Diagnostic Test: magnetic resonance imaging(MRI)<br>* magnetic resonance imaging(MRI) will be used to evaluate cerebral blood volume(CBV) of pain network<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| cerebral blood volume | magnetic resonance imaging(MRI) was used to evaluate cerebral blood volume(CBV) of pain network | 1 week | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| visual analogue scale | The intensity of neuropathic pain was measured using the visual analogue scale, Zero (0) represented no pain and 10 represented unbearable symptoms | 1 week | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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burn, neuropathic pain, cerebral blood volume