Study of PM Modulation Therapy in Trial Phase

Inclusion criteria

• . Capable of giving written informed consent to participate in this clinical study based on voluntary agreement after a thorough explanation of the patient's participation is provided to them.
• . Chronic intractable pain of the lower back equal to or greater than pain in lower limbs, and that has been refractory to conservative therapy for ≥ 3 months.
• . Must be older than 18 years old.
• . Average back pain intensity of ≥ 5 out of 10 on the numerical pain rating scale (NPRS).
• . Appropriate candidate for spinal cord stimulation trial.
• . Subjects must be on a stable dose of pain medication regimen for at least 1 month.
• . Female patients who are not pregnant and do not plan to become pregnant during the study. Females of child bearing potential must provide a negative pregnancy test and must be using reliable contraception and must continue to use reliable contraception until study completion. Non-childbearing potential is defined as postmenopausal for at least 2 years or surgical sterilization or hysterectomy at least 3 months before study start. Patients who become pregnant or who have a spouse/significant other that becomes pregnant during the course of this study agree to report pregnancy to the study physician/staff.
• . Must be able to comply with the requirement of study visits and follow-up and phone visits.

Exclusion criteria