Chap 86 Acquired AVF Flashcards Preview

Vascular Surgery > Chap 86 Acquired AVF > Flashcards

Flashcards in Chap 86 Acquired AVF Deck (14):
1

What are causes of aAVF?

Traumatic
Stab
Shotgun
iatrogenic
spontaneus

2

What are features of spontaneous AVF?

aneurysm rupture into a vein
IVC/ililac/left renal

3

Where does carotid fistulize to?

internal jugular

4

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

5

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
Venous collateral

6

At what time point can vessels changes be reversible if repaired?

2 years

7

What are clinical features common in all aAVFs?

pulsatile mass
thrill
bruit
distende veins
distal arterial insufficiency

8

What are duplex finding of AVF?

Fistilous connection
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

9

What are CTA findings of AVF?

Minimally invasive
Rapid
Accurate
Operator independent

10

What are angio findings of AVF

Early venous filling
Failure of distal vessels to opacify
Management

11

What are endovascular therapies for a AVF?

embolization
covered stent

12

What are some covered stents?

Icast, jostent, fluency, viabahn, wallgraft

13

What are some devices used for embolization?

Autologous clot
Gelatin sponges
Microfibrillar collagen
Polyvinyl alcohol
Metal coils
Liquid embolic agents

14

What do you intervene on AVF?

if symptomatic
if small can be conservative