Clinical Trial of the MiniStim PNS for Knee Pain- "FLEX" Study

Inclusion Criteria:

A. Capable of giving informed consent and willing to follow all study related procedures;

B. Women and men >18 years of age; C. Baseline VAS score of > 5; D. History of chronic, function-limiting knee pain of at least three months;

E. Not had recent surgical procedures of the knee within the last three months;

F. ≥50% temporary relief from temporary nerve diagnostics;

G. No evidence of anatomic abnormalities that could jeopardize the placement of the device;

H. Able to operate programmer, recharger, study assessments and provide accurate responses; I. Appropriate candidate for the implant procedure based on the opinion of investigator.

Exclusion Criteria:

A. An active implantable electronic device regardless of whether stimulation is ON or OFF;

B. Dependency on utilizing wearable or transcutaneous monitoring device (hearing aids,continuous glucose monitors, etc.); C. Pregnant as confirmed by a urine pregnancy test or plan to become pregnant during study; D. Subject noted no relief from temporary nerve diagnostics;

E. Inability to achieve appropriate positioning;

F. Inability to understand informed consent and protocol;

G. Conditions requiring recurring MRI evaluation or diathermy procedures;

H. Anatomical restrictions such that device placement is not possible; I. Have a life expectancy of less than 1-year;

J. Worker's compensation claimants;

K. Based on opinion of investigator any legal concerns that would preclude his/herenrollment in the study or potentially confound results; L. Deemed unsuitable for enrollment by investigator based on medical history or physicalexamination.