I looked up the medical term PAD and yes it is reduced blood flow to the lower leg. I was never told it was PAD after my ABI, I was just sent to a cardiologist who set me up for an angiogram which showed the blockage of the popliteal artery behind my knee that supplies the blood flow to your lower leg and foot. Once that was opened by a surgeon who specializes in artery and vein surgery my foot was a good 60% better. Not quite as numb or tingly but my toes were NOT purple and my foot was warm. But since the 60 days of numbness etc... there is probably permanent damage to cells and tissue. When I told my TKR surgeon he just said "why did you wait so long to get it fixed you could have lost your leg" told him because he didn't listen to me after surgery or my 2 week after visit!!
Be an Advocate for yourself and keep pursuing your problems.
Good Luck and keep me informed what you find out.