Doppler Segmental Pressures - LE Flashcards
limitations of Doppler (2)
cannot determine stenosis vs occlusion
cannot precisely localize the area of obstruction
a blood pressure cuff that is too large can result in a ___ blood pressure reading
lower
LARGE cuff, LOWER blood pressure
a blood pressure cuff that is too small can result in a ___ blood pressure reading
higher
when obtaining at rest/baseline Doppler signals, a patient should be resting for at least ___ mins before exam
20 minutes
four-cuff technique locations
high thigh
low thigh
below knee
ankle
three-cuff technique locations
high thigh
calf
ankle
normal ABI result
> 1.0
asymptomatic, minimal obstructive disease ABI
0.9-1.0
mild arterial disease ABI
0.8-0.9
moderate arterial disease ABI
0.5-0.8
severe arterial disease ABI
< 0.5
___ is the preferable exercise test because it produces a physiologic stress that reproduces ischemic symptoms
treadmill test
claudication is ___
extremity pain during exercise caused by low blood flow
Treadmill Test
≤ ___% elevation at 1.5 miles/hour
≤12% elevation at 1.5 miles/hour for 5 mins or until symptoms increase to such severity to stop
post exercise ABIs are obtained immediately and then every ___ minutes until pressures return to normal
2 minutes
ankle pressures that drop to low or unrecordable levels immediately after exercise and then increase to resting levels < 6 mins suggest ____
single level obstruction
ankle pressures that drop to low or unrecordable levels immediately after exercise and then increase to resting levels > 6 mins suggest ____
multilevel obstruction
___ is an alternate method to obtain Doppler signals when mobility, lungs, and heart are compromised
reactive hyperemia
reactive hyperemia = post exercise ankle pressures ____ 17% to 34%
reactive hyperemia = decrease in ankle pressures post exercises
single-level disease = ankle pressure drop ___ 50%
single-level disease = ankle pressure drop < 50%
multilevel disease = ankle pressure drop ___ 50%
multilevel disease = ankle pressure drop > 50%
