BurstDR™ micrOdosing stimuLation in De-novo Patients

Microdosing BurstDR consists of periods during which stimulation is delivered with standard
BurstDR stimulation parameters alternated with periods during which no stimulation is being
delivered.

In this study the investigators propose to evaluate therapeutic efficacy of BurstDR
microdosing, and determine optimal microdosing programming parameters in chronic pain
patients, who are eligible for SCS therapy.

Inclusion Criteria:

- Subject is able to provide informed consent to participate in the study;

- Subject diagnosed with chronic intractable pain associated with back and/or limbs;

- Subject is 18 years of age or older;

- Subject has failed to respond to at least 6 months of conventional treatment which may
include pharmacological treatment, physical therapy, epidural injections;

- Subject has a back and/or leg pain intensity of at least 6.0 cm out of 10.0 cm on the
average back and/or leg pain VAS at baseline;

- Subject's medical record has been evaluated by the Investigator to ensure that the
subject is a good candidate for a neurostimulation system;

- Subject is on stable pain medications with a total opioid for at least 28 days prior
to enrolling in this study, and is willing to stay on those medications with no dose
increase until the 3 month visit;

- Subject is willing to cooperate with the study requirements including compliance with
the regimen and completion of all office visits;

- Female candidates of child-bearing potential agree to commit to the use of an
effective method of contraception (including but not limited to sterilization, barrier
devices, oral contraceptives, intrauterine devices (IUDs), condoms, rhythm method, or
abstinence) for the duration of the study

Exclusion Criteria:

Subject has a current diagnosis of a coagulation disorder, bleeding diathesis, progressive
peripheral vascular disease, post-herpetic neuralgia or uncontrolled diabetes mellitus;

- Subject is currently participating in a clinical investigation that includes an active
treatment arm;

- Subject has been implanted with or participated in a trial period for a
neurostimulation system;

- Subject has an infusion pump;

- Subject has evidence of an active disruptive psychological or psychiatric disorder as
determined as per standard of care;

- Subject has a current diagnosis of a progressive neurological disease as determined by
the Investigator;

- Subject is immunocompromised;

- Subject has an existing medical condition that is likely to require repetitive MRI
evaluation in the future (i.e. epilepsy, stroke, multiple sclerosis, acoustic neuroma,
tumor);

- Subject has history of cancer requiring active treatment in the last 12 months;

- Subject has an existing medical condition that is likely to require the use of
diathermy in the future;

- Subject has documented history of allergic response to titanium or silicone;

- Subject has a documented history of substance abuse (narcotics, alcohol, etc.) or
substance dependency in the 6 months prior to baseline data collection;

- Subject is a female candidates of child bearing potential that are pregnant (confirmed
by positive urine/blood pregnancy test);

- Subject has life expectancy of less than 6 months;

- Subject is involved in an injury claim under current litigation