Peripheral Arterial Evaluation Flashcards
7 cards from real CCI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Peripheral Arterial Evaluation flashcards as text
A patient presents with rest pain and a non-healing ulcer on the great toe. ABI is 0.30. What Rutherford classification does this represent?
Answer: Category 5 — minor tissue loss
Rutherford Category 5 describes ischemic rest pain with minor tissue loss such as a non-healing digital ulcer.
Which velocity criterion on duplex ultrasound best identifies a native vessel stenosis of ≥50% in the iliac artery?
Answer: PSV ratio > 2.0
A PSV ratio greater than 2.0 compared to the adjacent normal proximal segment indicates ≥50% diameter reduction in the iliac artery.
During pulse volume recording (PVR), what does a flat or nearly absent waveform at the ankle level indicate?
Answer: Severe proximal occlusive disease
A flat PVR waveform at the ankle indicates severe reduction in pulsatile blood flow from significant proximal occlusive disease.
What is the primary advantage of CTA over duplex ultrasound in evaluating lower extremity PAD?
Answer: Better visualization of calcified vessels and runoff anatomy
CTA provides excellent visualization of the entire arterial tree including runoff vessels, even in heavily calcified arteries, superior to duplex for planning revascularization.
A post-stent duplex scan of the superficial femoral artery shows a PSV of 350 cm/s within the stent. What is the most appropriate interpretation?
Answer: In-stent restenosis ≥50%
An in-stent PSV greater than 300–350 cm/s with an elevated PSV ratio indicates significant in-stent restenosis of ≥50%.
Which finding is most consistent with popliteal artery entrapment syndrome in a young athlete?
Answer: ABI dropping with plantar flexion or dorsiflexion maneuvers
Popliteal artery entrapment causes dynamic compression during muscle contraction, detected by ABI or waveform changes with provocative foot maneuvers.
In a patient with suspected Raynaud's phenomenon, digital photoplethysmography (PPG) is performed before and after cold provocation. Which response confirms vasospastic disease?
Answer: Marked decrease or obliteration of waveform amplitude after cold challenge
A marked reduction or loss of digital PPG waveform amplitude following cold provocation confirms vasospastic Raynaud's phenomenon.