Duplex/color flow imaging ABD Flashcards Preview

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Flashcards in Duplex/color flow imaging ABD Deck (33):
1

Arteries imaged?

Celiac, SMA, renal arteries, aorta, common iliacs, externally iliacs (prox, mid, distal), and internal iliac artery

2

An aneurysm is classified when?

Dilation > 3 cm or 50 % increase in diameter of original artery

3

The majority of AAA are?

atherosclerotic and infrarenal

4

Most frequent complications of an AAA?

rupture or embolization of the peripheral aneurysms

5

Many patients who have hypertension have?

renovascular hypertension

6

Renal artery stenosis can be secondary to what?

atherosclerosis or fibromuscular dysplasia

7

Renal artery protocal:

a) celiac and SMA velocity data
b) aorta PSV near SMA level
c) evaluate kidneys
d) PSV and EDV of prox, mid, distal renal artery
e) PSV and EDV of upper and lower pole of kidney in seg arteries
f) observe for secondary or accessory renal arteries

8

Renal arteries, kidney arteries, celiac, hepatic, and splenic arteries are all what resistance?

low

9

The aorta and fasting SMA and IMA are what resistance?

higher

10

Renal to aortic ratio

highest renal artery PSV/ AO PSV

11

Normal RAR:

less than 3.5

12

Abnormal RAR:

> 3.5 suggests > 60 % diameter reduction

13

When can an RAR not be used?

If AAA detected
If aortic PSV > 90cm/s or

14

End Diastolic Ratio (EDR) or the parenchymal resistance ratio for kidney:

EDV/PSV
normal: > 0.2
abnormal: less than 0.2

15

Resistivity index for kidney:

PSV-EDV/PSV
normal= 0.75

16

Abnormal calculations indicate an increase in distal resistance:

nephrosclerotic disease

17

With a PSV of 45 cm/s and an EDV of 5 cm/s, what is the EDR and the RI?

EDR= 0.1
RI= 0.88

18

What is tardus parvus?

Dampened, weak doppler signals with low resistance quality

19

Patients with a history of dull, achy or crampy abdominal pain 15-30 minutes after eating?

mesenteric ischemia

20

mesenteric ischemia (angina) may be due to a stenosis or occlusion of?

SMA, celiac, or IMA

21

Protocol for mesenteric arteries?

Fasting patient
PSV and EDV of celiac, SMA (p, m, d), IMA, and aorta
After eating (post-prandially) PSV and EDV of the SMA are obtained

22

For the food challenge test, have patient drink high caloric liquid (Ensure) and repeat the exam within how much time?

20-30 minutes
hyperemic response begins after about 10 min, max response time about 30 min

23

What is not influenced by the post-prandinal state?

Liver and spleen have fixed metabolic requirements
Celiac artery

24

If IMA is easily observed, often suggests?

SMA occlusion

25

In most cases how many mesenteric vessels have to be abnormal to be consistant with chronic mesenteric ischemia?

2 of 3

26

Extrinsic compression of celiac artery origin by what is frequently seen?

median arcuate ligament of the diaphragm

27

Pre and post operative evaluation of liver transplant includes documenting patency of?

portal vein, hepatic vein, IVC, and hepatic artery

28

post-op liver transplant complications can include thrombosis of vessels such as?

portal vein, IVC, and/or hepatic artery leading to hepatic infarction

29

Acute rejection will cause liver dysfunction and many suggest rejection is a?

cellular process

30

Transplanted RA anastomosed to what arteries?
Transplanted RV to what vein?

RA: external iliac artery or internal
RV: external iliac vein

31

post-op renal artery transplant includes?

renal artery doppler evaluation and kidney examination checking for hematoma and parenchymal echogenicity

32

Signs of renal transplant rejection?

increased transplant size and increased cortical echogenicity
acute rejection often increases arterial resistance

33

What method for rejection diagnosis for kidneys do many consider to be most reliable?

biopsy
others use the indicator of increased arterial resistance