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Flashcards in Misc arterial testing Deck (18):
1

How is arteriography preformed?

A thin catheter is inserted in a superficial artery, most common are CFA, axillary, or brachial. Contrast agent injected. Fluoroscopy used to obtain image. Patient remains supine for 6-8 hours with a sandbag over area to avoid bleeding.

2

How does atherosclerotic plaque appear on arteriography?

irregular or smooth

3

What is a vasospasm?

severe narrowing usually without occlusion

4

Limitations of arteriography?

patients allergic to contrast or in kidney failure
inaccurate in its hemodynamic assessment because of inability to provide many images in multiple planes in real time

5

Complications of arteriography?

hematoma, pseudoaneurysm, occlusion, neurologic complications

6

What uses radio frequency energy and a strong magnetic field to produce images?

MR angiography
MRI instruments quantitate blood flow and construct images that look like angiograms. Show flowing blow without contrast

7

Limitations of MRA?

-presence of metal clips, pacemakers
-can overestimate stenosis due to slow flow or turbulence
-expensive
-claustrophobia

8

What are MRA useful for?

AAA, dissections, peripheral artery evaluation

9

What is computerized tomography useful for?

size of aorta, extent of aneurysm, helps define relationship of aorta to renal artery origins

10

How is aspirin helpful for arterial problems?

-It is an antiplatelet drug that decreases platelet aggregation resulting in decreased thrombotic activity
-Other medications help decreased blood viscosity
-Antihypertensive drugs serve to decrease forces against the walls

11

What is the surgical removal of athersclerotic material, usually form the intimal lining?

Endarterectomy

12

Common bypass grafts?

ao to iliac arteries (also used for AAA)
ao to bi-femoral (also used for AAA)
femoral to popliteal
femoral to PTA; to ATA; to Peroneal
other: renal artery, SMA

13

What is used to dilate focal plaque formation in vessel?

angioplasty
(percutaneous transluminal angioplasty)

14

How is the angioplasty preformed?

catheter with balloon tip is inserted and inflated to push plaque against the vessel wall

15

What vessels are angioplasties usually preformed in?

renal, iliac, femoral, or popliteal

16

What is used to maintain intraluminal structure/patency of artery? Acts as a type of scaffold.

stent/ stent graft
used in ao, renal, iliac, femoral, repair AAA

17

Limitations of a stent?

abd gas, patient unable to lie flat, complications similar to arteriography

18

Complications of stents

restenosis. stent migration, graft limb compression, twisting, dislodgment, leaks