Flashcards in Chap 84 86 Acquired AVF and Spine exposure Deck (13):
What incision best for T3-T6?
What are different approaches to the lumbosacral spine?
What are different methods of acquiring an AVF?
What is the natural hx of an iatrogenic AVF?
shunt volumes <500
50% close spon
List disease associated with spontaneous AVF.
What are the aAVF connection for carotid and vert?
to internal jugular
What are RF for femoral aAVF?
Higher dose heparin
Left sided puncture
What anatomical parameters determine flow in the distal artery?
CSA of fistula =/< then 1.5 d of inflow artery then distal flow in artery maintained
flow diminished or reversed if opening threefold size of artery
prox flow increase by x5 if 3
What are changes to vessels in chronic aAVF?
Proximally artery elongates
Artery thins ultimately leading to aneurismal degen
Proximal vein enlarges and becomes tortuous
Distal artery flow often reversed
Reversible if repaired within 2 years
What are cath findings with large aAVF?
elevated RA, RV, wedge P
decease in PVR
What are findings on duplex for aAVF?
Clor 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 findings of aAVF on angio?
Early venous filling
Failure of distal vessels to opacify