Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
15 Cards in this Set
- Front
- Back
What are the capabilities of duplex/ color flow imaging?
|
Localize stenosis/ occlusion
Determine presence/ absence of aneurysm Post op study of hemodialysis access or arterial bypass graft Detect AVF's |
|
Sample size of pulsed doppler is usually?
|
1-1.5 mm and increased as needed
|
|
Is it common for upper extremity arteries to become stenosed?
|
No, main use is evaluation of dialysis access grafts
|
|
Is it normal or abnormal to hear a thrill at a hemodialysis access site?
|
Normal. You can hear it at a patent site as well as a stenotic one.
|
|
How do you evaluate a dialysis access graft?
|
Inflow artery
Arterial anastomosis Continue through body of arch Venous anastomosis Outflow vein |
|
Examples of dialysis access grafts include?
|
Brescia-Cimino fistula, straight, lopped synthetic grafts
|
|
Why is there no current criteria for evaluated stenosis in upper extremity?
|
Normal PSV vary widelyn with skin temperature changes
|
|
If a a >50% reduction is present, what do you do?
|
Observe for stenosis profile
|
|
What should you see if you have an occlusion of upper extremity?
|
Observe for lack of doppler signals and the proverbial thump which is obtained proximal to occlusion
|
|
What type of aneurysm can be formed by using palm of hand as a hammer?
|
Ulnar artery aneurysm
|
|
PSV and EDV vary as to the type of access but normally both are?
|
Elevated
|
|
Low PSV's obtained in access graft could indicate?
|
Arterial INFLOW problems
|
|
What are the most common sites for stenosis in a hemodialysis access?
|
Venous anastomosis and outflow vein are most common
|
|
What is a Steal syndrome?
|
Distal arterial blood is reversed into lower resistant venous circulation
|
|
What symptoms can a steal syndrome cause?
|
Pain on exertion, pallor and coolness distal to shunt.
|