Clinical trials

This is a retrospective-prospective study in which 40 patients have received a permanent Freedom PNS System. Subjects presented with chronic, intractable pain of peripheral nerve origin refractory to standard medical and/or surgical treatment. A retrospective chart review will be conducted to assess baseline and follow-up parameters in patients who have received a permanent implant with the Freedom PNS system for at least 12 months. Missing data might be collected after informed consent.

To demonstrate the potential benefits and risk of active sub-threshold stimulation in the treatment of chronic knee pain as compared to subjects that did not have active stimulation. Improvement will be assessed in relation to the clinical outcome measures of pain, with primary endpoint; Pain relief rate as measured by the number of subjects with greater or equal to a 50% decrease in pain on the visual analog scale, comparing baseline to the 1-month follow-up.