Arteries blocked in legs. Is increasing.

My mom got operated for Arthritis 2 years ago and both her legs have a stent as her blood vessels were blocked. Despite of the surgery she was having mild to moderate pain continuously. Few months after surgery she was again asked to do doppler and angiography and was then asked meet a rheumatologist. Rheumatologist concluded that her blocks have increased till kidneys. She has given bp tablets and blood thinning tablets since 2 yrs like ecosprin, wyoslne, MMF, coversyl, complamina, HCQS and constantly getting various tests done like ANA, ANCA, Uric acid etc. Now, my mom's legs have completely become red with spots all over it. Now she finds it difficult to even stand. Recently she has also felt swelling in her hands along with both her legs. She's a teacher by profession and will get retired by July 2017. I just want to know a permanent solution to this undiagnosed problem. I tried 4-5 doctors from cardio vascular surgeon to rheumatologist but all in vain. Her pain is increasing.