- Phase 2- Interview and examination. Subjects will complete a comprehensive medical history, physical exam, and blood work (per Standard of Care. The PI or SI will perform an ankle joint range of motion examination and a Semmes-Weinstein 5.07 monofilament examination (per Standard of Care. A comprehensive metabolic panel will be ordered including hemoglobin A1C, BUN, and CR (per Standard of Care). Patients will then be referred to the vascular surgery department for noninvasive and/or invasive vascular studies (per standard of care) and patient will be scheduled for surgery at this time.