Subject is planning to have a temporary trial with the Evoke System to aid in the management of chronic intractable pain of the trunk and/or limbs, including unilateral or bilateral pain associated with failed back surgery syndrome and/or intractable low back pain and leg pain.

Leg pain score ≥ 6 cm (Visual Analog Scale \[VAS\]).

Back pain score ≥ 6 cm (VAS).

Subject is able to speak, read, and/or understand English, willing and capable of giving informed consent, and able to comply with study-related requirements, procedures, and visits.

Subject is not pregnant and not \<18 years of age.

Clinical Utility of Neurophysiological Measurements of ECAP-controlled Closed-loop SCS to Guide Treatment of Chronic Pain

What this study is about