Study of StimRouter for Chronic Knee OA Pain

The goal of this study is to evaluate the use of StimRouter Neuromodulation System (StimRouter) in adult subjects with an established diagnosis of primary femorotibial osteoarthritis in the target knee (Kellgren-Lawrence ≥1) who have surgical contraindications to undergo a knee joint arthroplasty procedure. The main questions it aims to answer are: 1. To assess the effect of the StimRouter Neuromodulation System to manage joint pain in patients with symptomatic OA of the knee who are surgically contraindicated to undergo a knee joint arthroplasty 2. To assess the effect of StimRouter on joint stiffness, function and patient quality of life Participants will have StimRouter leads implanted then clinic visits will be scheduled for follow-up at Week 2, Month 3 and Month 6 (End of Study (EOS) or Early Termination (ET)).