Geniculate Artery Embolization

This is a single center phase I and II study which is designed to initially assess the safety, and later the efficacy of geniculate artery embolization in reducing pain compared to a control group undergoing only conservative presurgical management. This study will consist of two phases, each with a 1 month preprocedural evaluation, day of treatment and 30 day follow up period for the first 10 participants and 6 month for the remaining 40 participants. 10 participants will be enrolled for the first phase, and 40 participants will be enrolled for the second phase at the University of Minnesota Medical Center. Enrollment is expected to take up to 6 months for each phase of the study. The collection of data will be accomplished by utilizing a clinical research team that will assess the efficacy and safety. Efficacy assessments will include; Joint injection intervals, MRI, X-ray, joint aspiration / serologies and patient questionnaires evaluating joint pain. Safety assessments include participant and investigator reported adverse events, vital signs, (blood pressure, heart rate, temperature), and physical exam.