Vasc- peripheral artery testing PT 2 Flashcards
1
Q
Protocol step 1?
A
bilateral ABI measurements
2
Q
what is bilateral ABI measurements?
A
- ankle brachial indice: ankle.brachial systolic pressure
- BRA pressure- use highest systolic measurement of LT or RT arm
- RT leg- use highest of PTA or dorsalic pedis A
- LT leg- use highest of PTA or dorsalic pedis A
3
Q
what does ABI give you an indication of?
A
- how much disease you may encounter
4
Q
what measurement if indicative of little or no hemodynamically significant stenosis?
A
> 9.0
5
Q
mild disease = ABI ?
A
0.8 to 0.89
6
Q
moderate disease = ABI?
A
0.5-0.79
7
Q
severe disease = ABI
A
<0.5
8
Q
ischemis rest pain= ABI?
A
<0.3
9
Q
ABPI=
A
highest ankle pressure/ highest brachial pressure
10
Q
exam step 2?
A
- Bilateral exam is always performed
- Image the arteries from the groin to the proximal PTA/PER A and ATA(trif)
- The vessels at the ankle should be imaged and documented at the time of performing ABI measurements
11
Q
color/doppler ratios?
A
- colour should be analyzed for aliasing
- doppler spectral tracings at all of the above levels if normal
- ratio measurements are taken at the sites of narrowing/aliasing
- PSV proximal to the stenotic zone and highest attainable PSV in the stenotic zone
- Angle correct of 60 degrees must be used for both: a ratio of >2 is hemodynamically significant(the higher the ratio the more severe the disease is)
- PST is also imaged and documented
12
Q
normal velocity ratio?
A
<1.5:1
13
Q
25-50% stenosis velocity ratio
A
1.5-2: 1
14
Q
50-75% stenosis velocity ratio?
A
2-4: 1
15
Q
> 75% stenosis velocity ratio?
A
4:1
