I was told my left three stents were occluded recently by my IR. I have been running out of money for procedures. (two)
I went on a higher dose Aspirin on my own. That was not on my IR's protocol. My thyroid ultrasound dr said I have a partial occlusion,

Now my Vascular surgeon, who only does my carotids annually, said he sees flow in the stents. Slow but flow, maybe have another Venogram by my treating IR to be sure who is right. (sigh)
Now three doctors, three different reports. Each has the knowledge, and the new color Doppler, only one is my IR.
I think head turning has a lot to do with seeing flow, or not. Muscles can stop the flow turning the head. The Vascular doc thinks the stent is narrower on top from outside forces near top of neck below ear, but not by much.
What to do?
CD