Chapter 15:Miscellaneous tests/treatment Flashcards Preview

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Flashcards in Chapter 15:Miscellaneous tests/treatment Deck (24)
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1
Q

arteriography is

A

peructaneous puncture of superficial artery

insertion of thin catheter

2
Q

most common arteries used for arteriography

A

CFA
axillary
brachial

3
Q

ateriography technique

A
contrast injected into catheter flows with moving blood 
gives picture of lumen
uses fluoro
cath removed
pt must remain supine 6-8 hours
4
Q

arteriography interpretation

A

based on how much of artery fills
plaque appears irregular or smooth
no filling seen with occlusion

5
Q

fibromuscular dysplasia on arteriography

A

string of beads

multiple arterial stenoses caused by medial hyperplasia

6
Q

vasospasm on arteriography

A

severe narrowing without occlusion

7
Q

complications of arteriography

A

hematoma at puncture site
pseudo
local arterial occlusion
neurologic complications

8
Q

MR angiography (MRA)

A

MRI quantitate blood flow and construct images that look like angiograms
flowing blood well distinguished from soft tissue without using contrast

9
Q

limitations of MRA

A

can overestimate stenosis due to slow flow or turbulence

10
Q

MRA is useful for

A

AAA
dissections
peripheral artery evaluation

11
Q

CT for arteries

A

uses ionizing radiation

IV contrast

12
Q

CT is good for

A

size of aorta
extent and size of aneursyms
defining relationship of aorta to renal artery origins

13
Q

endarterectomy

A

surgical removal of plaque

14
Q

bypass graft

A

provides alternate pathway for blood to travel when significant stenosis is present

15
Q

common bypass grafts

A

aorta to both iliacs (used for AAA)
aorta to bifemoral (AAA)
femoral to popliteal
femoral to PTA, to ATA, to peroneal

16
Q

angioplasty is

A

used to dilate focal plaque formation in vessel
percutaneous transluminal angioplasty PTLA
balloon catheter injected into vessel and inflated to widen vessel lumen

17
Q

angioplasty is usually performed in vessels with

A

focal stenosis

renal, iliac, femoral, pop arteries

18
Q

complications of angioplasty

A

complications occur in less than 5% of cases
minor discomfort
mobidity, mortality, and costs are low

19
Q

Intravascular Ultrasound IVUS

A

US probe at tip of cather provides image of vessels from inside-out

20
Q

IVUS is used to

A

eval plaque formation
post procedure to asses need for further treatment
determine correct placement of stent
identify ao dissection

21
Q

stent/graft is used

A

to maintain intraluminal structure/ patency of artery

used in aorta, renal, iliac, formoral, repair of AAA,

22
Q

limitations of stent placement

A

abdominal gas
pt cant lie flat
complications similar to arteriography

23
Q

complications of stents

A
restenosis due to intimal hyperplasia
stent migration
graft limb compressing
twisting
dislodgment
endoleaks
24
Q

doppler near a stent

A

flow acceleration post stent possible