Peripheral Arterial Disease- Lecture 2

Question 1

CW doppler has ____ crystals and angle of insonation is _____degrees

Answer 1

2, 45-60

Question 2

-estimates the frequencies
-displayed on strip chart recorder
-not as common as spectral analysis
-zero-crossing frequency meter
can adjust the gain*

Answer 2

Analog

Question 3

• displays individual frequencies using FFT method

- time is on horizontal axis, velocity or frequency shifts is on vertical axis

Answer 3

spectral waveform

Question 4

peak systolic pressure is ______ as the pulse wave progresses down the lower limb

Answer 4

amplified

Question 5

they systolic pressure measured at the ankle is normally ______ than that in the upper arm

Answer 5

higher

Question 6

smaller vessels = ________ in resistance and ______ in diastolic flow component

Answer 6

increase, decrease

Question 7

most reliable pressure parameter for diagnosis of arterial narrowing

Answer 7

peak systolic pressure/velocity

Question 8

is CW qualitative or quantitative?

Answer 8

qualitative

Question 9

first change seen with disease is ….

Answer 9

loss of reverse component

Question 10

Monophasic can be found ______ and _____ to an occlusion

Answer 10

proximal, distal

Question 11

vasodilation of the distal vessels often occur with _____ obstruction, reducing the pulsatility, causing the signals to have lower resistant (steady) flow quality

Answer 11

proximal

Question 12

analog not capable of detecting velocities less than ____cm/sec

Answer 12

6

Question 13

doppler typically used in lower extremities

Answer 13

CW

Question 14

what should you adjust to get rid of noise

Answer 14

increase the filter and reduce the gain

Question 15

quantitative interpretation

Answer 15

• pulsatility index
• acceleration time
• inverse damping factor
• transit time

Question 16

Pulsatility Index

Answer 16

peak 1 to peak 2 divided by mean frequency

Question 17

normal CFA and pop. PI

Answer 17

75.5 and 8

Question 18

aortoiliac occlusive disease has an API of ….

Answer 18

less than 5

Question 19

time of onset of systole to point of maximum peak velocity

decrease is normal

Answer 19

acceleration time

Question 20

increased or prolonged amount of acceleration time indicates disease is present ______ to site of interrogation

Answer 20

proximal

Question 21

greater than _____ msec in CFA/EIA suggests significant iliac disease

Answer 21

133

Question 22

• ratio of distal PI to the proximal PI of a segment in an artery
• ratio of proximal SFA to distal

Answer 22

Inverse Damping Factor - IDF

Question 23

normal Inverse Damping Factor (IDF)

Answer 23

0.9-1.1

Question 24

Popliteal IDF of 0.9 or less suggests…

Answer 24

SFA occlusion or stenosis

Question 25

- systole should be simultaneously evident at a specific site bilaterally - a delay on one side may indicate a more proximal occlusive process

Answer 25

transit time

Question 26

transit time is an ________ assessment

Answer 26

bilateral

Question 27

cuffs for ABI should have width of _____% greater or ____ diameter of the limb

Answer 27

20, 1.2

Question 28

the diastolic and mean pressure gradually ______ as the pulse wave moves distally

Answer 28

decreases

Question 29

smaller vessels = _______ in resistance and ________ in diastolic flow component

Answer 29

increase, decrease

Question 30

Obtain pressures starting at the _______, moving ____ the leg. otherwise pressures would be falsely _______

Answer 30

ankle, up | lower

Question 31

any reduction in distal ABI pressure should be less than _____mm Hg between adjacent segments

Answer 31

20-30

Question 32

______ of thigh cuff changes interpretation

Answer 32

width

Question 33

foot and toe ulcers will fail to heal if the toe pressure is less than _____ mmHg

Answer 33

30

Question 34

concave is _______ downstroke whereas, convex is ________ downstroke

Answer 34

normal, abnormal

Question 35

for exercise testing the treadmill should be at a less than _____% elevation at _____ mph for a maximum of ____ min or until pt must stop

Answer 35

12, 1-2, 5

Question 36

what's a common anatomical variant in the upper arm?

Answer 36

radial artery originates in the mid to upper arm

Question 37

upper extremity arterial disease accounts for only ____% of all extremity ischemia

Answer 37

5

Question 38

normal subclavian artery velocity is ....

Answer 38

80-120 cm/sec

Question 39

most likely area in the upper extremity to have PAOD...

Answer 39

subclavian and proximal axillary arteries

Question 40

a greater than ______ mmHg difference in brachial systolic pressure indicates a presence of greater than 50% diameter reduction of the subclavian artery (or under cuff artery) a greater than _____ mmHg difference between adjacent segments indicates disease as well

Answer 40

20, 20

Question 41

- evaluates patency of the palmer arch | - optional test that can be performed in conjunction with the upper extremity arterial doppler examination

Answer 41

Allen's Test