MC5-A Scrambler Therapy or TENS Therapy in Treating Patients With Chemotherapy-Induced Peripheral Neuropathy

PRIMARY OBJECTIVES:

I. Evaluate the efficacy of scrambler therapy (MC5-A scrambler therapy) compared to TENS
therapy for pain and/or tingling related to chemotherapy-induced peripheral neuropathy
(CIPN).

II. Evaluate the tolerability of scrambler therapy and compare it to TENS therapy, in this
population.

III. Evaluate whether scrambler therapy, compared to TENS therapy, can decrease the use of
pain medication for CIPN.

IV. Explore whether messenger ribonucleic acid (mRNA) gene expression before and after
scrambler therapy shows similar findings to what Starkweather et al observed.

V. Utilizing high-field magnetic resonance imaging (MRI), to define alterations in functional
differences (using resting state blood-oxygen-level dependent [BOLD] measures to measure
differences in functional connectivity) in treated with the scrambler device in the setting
of chemotherapy induced peripheral neuropathy pain.

VI. Explore whether scrambler therapy will alter sensation.

OUTLINE: Patients are randomized to 1 of 2 treatment arms.

ARM I: Patients undergo MC5-A scrambler therapy over 30 minutes for 10 consecutive weekdays.

ARM II: Patients undergo TENS therapy over 30 minutes daily for 14 days.

Patients in both Arms, may crossover to the opposite Arm for an additional 2 weeks of
treatment if they elect.

After completion of study treatment, patients are followed up weekly for 8 weeks.

Inclusion Criteria:

- Pain or symptoms of CIPN of >= 3 months duration, for which the patient wants
intervention

- Note: neurotoxic chemotherapy must have been completed >= 3 months prior to
registration and there must be no further planned neurotoxic chemotherapy for > 5
months after registration

- Patients have to relate that tingling or pain was at least a four out of ten problem
=< 7 days prior to registration, on a 0-10 scale where zero was no problem and ten was
the worst possible problem

- Note: the patient is expected to have tingling or pain of at least 4/10 at the
time of the first treatment

- Eastern Cooperative Oncology Group (ECOG) performance status (PS) = 0, 1, or 2

- Life expectancy >= 6 months

- Ability to complete questionnaire(s) by themselves or with assistance

- Ability to provide informed written consent

- Case review by the study chair, or designate, as a case where treatment should be
tried

Exclusion Criteria:

- Any of the following:

- Pregnant women

- Nursing women

- Women of childbearing potential who are unwilling to employ adequate
contraception

- Existing operational implantable drug delivery systems, e.g. Medtronic Synchromed

- Existing implantable medical electronic devices, life-supporting medical devices, and
medical monitoring devices

- Note: metal implants for orthopedic repair, e.g. pins, clips, plates, cages,
joint replacements are allowed as are central venous access devices

- History of myocardial infarction or ischemic heart disease within the past six months

- History of epilepsy, brain damage, use of anticonvulsants for seizure prevention,
concurrently using ketamine, symptomatic brain metastases

- Skin conditions such as open sores that would prevent proper application of the
electrodes

- Other medical or other condition(s) that in the opinion of the investigators might
compromise the objectives of the study

- Currently receiving gabapentin or pregabalin and not willing to be weaned off of these
medications prior to Scrambler therapy initiation

- Note: it is OK to continue these medications in patients who are receiving TENS

- History of peripheral neuropathy prior to receiving neurotoxic chemotherapy

- Prior treatment with Scrambler therapy