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Clinical Trial Details — Status: Withdrawn

Administrative data

NCT number NCT00815932
Other study ID # SOR477808CTIL
Secondary ID
Status Withdrawn
Phase N/A
First received December 30, 2008
Last updated October 3, 2017
Start date September 2016
Est. completion date October 2017

Study information

Verified date October 2017
Source Soroka University Medical Center
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

This is a controlled trial designed to determine short- and long-term effects of repeated tDCS on the P300 component of event-related evoked potentials in patients with chronic neuropathic pain due to Complex regional Pain Syndrome (CRPS) or diabetic neuropathy as compared with healthy subjects.


Recruitment information / eligibility

Status Withdrawn
Enrollment 0
Est. completion date October 2017
Est. primary completion date October 2017
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria:

- An affected upper limb or lower limb

- Diagnosed as : Diabetic neuropathy, Complex Regional Pain Syndrome (CRPS), Chemotherapy Induced Pain Neuropathy (CIPN), Peripheral Neuropathy.

- Have not responded to at least two medications of the following groups: Opioids. Tricyclics, SSRI, SNRI, Pregabalin, Gabapentin, Anticonvulsants.

- Positive LANSS or CRPS criteria as follows:

1. Continuing pain which is disproportionate to any inciting event or for CRPS diagnosis.

2. Must report at least one symptom (symptoms here are reports by subject) in each of the four following categories: sensory, vasomotor, sudomotor/edema, motor/trophic.

3. Must display at least one sign (signs here refer to objective observation/testing) in in each of the four following categories: sensory, vasomotor, sudomotor/edema, motor/trophic;

- Must meet resistant neuropathic pain criteria - pain that is neuropathic in characters that at least two neuropathic medications not from the same group have been tried for at least a month without improvement or severe side-effects were experienced. Resistant neuropathic pain with a score for "average pain in the last 24 hours" =4 on a numeric scale 0-10

- tDCS naive

Exclusion Criteria:

- Serious health problems other than CRPS or resistant neuropathic pain (e.g. uncontrolled hypertension, uncontrolled diabetes, heart failure)

- Pain/painful conditions unrelated to CRPS or neuropathic pain

- Pregnancy

- History of seizures/epilepsy

- Implanted device (e.g. pacemaker)

- Active illicit drug/alcohol abuse

- Unable to follow directions or complete tools in Hebrew

- Previous exposure to tDCS stimulation

Study Design


Intervention

Device:
TDCS/sham procedure on five consecutive days
The latency and amplitude of P300, subjective pain intensity, and pain thresholds for tactile and thermal stimuli will be determined at before and 15 min and 120 min after the 1st and 5th tDCS/sham procedure, To receive tDCS/sham treatment, two electrodes will be placed on the patient´s skull (for details see section Methods) and the patient will rest for 5 min. After that, the patient will receive 20 minutes of 2 mA tDCS/sham. Subjective pain intensity, and pain thresholds for tactile and thermal stimuli will be determined before-, 15 min after and 120 min after each tDCS/Sham procedure. At the 1st and 5th tDCS/Sham session, the latency and amplitude of P300 will be determined before-, 15 min after and 120 min after the tDCS/sham procedure.

Locations

Country Name City State
Israel Pain and palliative care unit, Ben Gurion University of the Negev Beer-Sheva

Sponsors (1)

Lead Sponsor Collaborator
Soroka University Medical Center

Country where clinical trial is conducted

Israel, 

Outcome

Type Measure Description Time frame Safety issue
Primary Changes in the amplitude of P300 15 min after and 120 min after the 1st tDCS, 15 min after and 120 min after the 5st tDCS, and at the follow up 1 week after the 5th tDCS.
Primary Changes in the Latency of P300 15 min after and 120 min after the 1st tDCS, 15 min after and 120 min after the 5st tDCS, and at the follow up 1 week after the 5th tDCS.
Secondary Changes in Pain Intensity-will be calculated as the difference in scores on the 11-point numerical pain rating scale (0-10) 15 min after and 120 min after each tDCS stimulation
Secondary Changes in Pain Thresholds for Tactile and Thermal Stimuli will be calculated as the difference between ratings obtained form pain threshold measurements before- and after tDCS 15 min after and 120 min after each tDCS stimulation
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