USIDMS LE Arterial Doppler
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What is the most common symptom of peripheral arterial disease? | Claudication
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| What are the most common sites for atherosclerotic disease? | Bifurcations, trifurcations, and vessel origins (eg: SFA at adductor canal, infra-renal aorto-iliac system)
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| In the lower extremities, a ____% stenosis is considered hemodynamically significant | 50%
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| Describe the "stenosis profile" | Dampened velocities - proximal to stenosis
Increased velocities - at stenosis
Spectral broadening – distal to stenosis
Post-stenotic turbulence
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| Describe the difference between the 3-cuff and 4-cuff methods | The 3-cuff method is more accurate. The 4 cuff method – will artificially elevate thigh pressures, but will localize disease more than 1 cuff would
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| How should one select an appropriate cuff size? | Bladder of cuff should be 20% wider than limb diameter
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| Cuffs should be inflated ____-____ mmHg above the last audible Doppler signal | 20-30 mmHg
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| What are you looking for when interpreting a segmental pressure study? | Look for a 30 mmHg or greater pressure drop side-to-side or in adjacent segments
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| What ABI would suggest multi-level disease? | < 0.5
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| With an abnormal PVR, where is the disease? | An abnormal PVR will always mean that there is disease proximal to the waveform
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