Flashcards in Chap 86 Acquired AVF Deck (14):
What are causes of aAVF?
What are features of spontaneous AVF?
aneurysm rupture into a vein
Where does carotid fistulize to?
What is the flow physiology of aAVF?
Direction of flow in distal artery is maintained when the CSA of the fistula is = or x3
Proximally flow can increase x 5 if 3
What are vessel features of chronic aAVF?
Proximally artery elongates
Artery thins ultimately leading to aneurismal degen
Proximal vein enlarges and becomes tortuous
Distal artery flow often reversed
At what time point can vessels changes be reversible if repaired?
What are clinical features common in all aAVFs?
distal arterial insufficiency
What are duplex finding of AVF?
Color mosaic at level of fistula
Color pixels in adjacent soft tissue
Loss of triphasic wave forms in prox artery
Decreased flow in distal artery
Continuous high velocity flow in vein cephalad
What are CTA findings of AVF?
What are angio findings of AVF
Early venous filling
Failure of distal vessels to opacify
What are endovascular therapies for a AVF?
What are some covered stents?
Icast, jostent, fluency, viabahn, wallgraft
What are some devices used for embolization?
Liquid embolic agents