Duplex/color Flow Imaging (abdomen)

Question 1

What are the main vessels in the abdomen that we do color flow on and the key diagnostic reason for each (5)

Answer 1

• aorta-iliac vessels: eval for stenosis, status of bypass grafts, aneurysmal disease
• renal artery: document a >60% diameter reduction
• Kidney: presence of disease and transplants
• Mesenteric arteries: document significant stenosis
• Liver: suspected portal hypertension, pre/post liver transplants

Question 2

The interpretation to consider an aneurysm must have a dilation of > ____cm or an increase in diameter of ____% greater than original artery

Answer 2

> 3cm

Diameter of 50% greater

Question 3

What is the MOST COMMON area for an abdominal aortic aneurysm (AAA)

Answer 3

Infrarenal (below renal artery branches)

Question 4

The two types of aneurysms, true and false: which one relates to the presents of thrombus and which one relates to fusiform/saccular shape

Answer 4

TRUE aneurysms: fusiform or saccular

FALSE aneurysms: ? Thrombus present

Question 5

What are the two most frequent complications related to an AAA

Answer 5

RUPTURE of the aortic aneurysm

EMBOLIZATION of the peripheral aneurysms

Question 6

Most renal artery study patients renovascular hypertension, what are two common primary cause of this

Answer 6

Renal artery stenosis

Occlusion

Question 7

Renovascular hypertension is often caused from renal artery stenosis (RAS), this can be secondary to what two diseases

Answer 7

Atherosclerosis

Fibromuscular dysplasia

Question 8

This mechanism for hypertension is an enzyme that converts angiotensinogen to angiotensin

Answer 8

Renin

Question 9

With hypertension, angiotensin starts the process to save fluid resulting in?

Answer 9

This results in high blood pressure