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Peripheral Vascular Assessment Flashcards

7 cards from real CVT 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 Vascular Assessment flashcards as text

  1. A patient with diabetes has an ABI of 1.4. What does this result most likely indicate?

    Answer: Non-compressible calcified vessels

    An ABI greater than 1.3 typically indicates non-compressible, calcified vessels (often seen in diabetics and renal failure patients), making the ABI unreliable.

  2. Which segment of the lower extremity venous system is MOST commonly involved in deep vein thrombosis (DVT)?

    Answer: Calf (tibial/peroneal) veins

    Calf (distal) veins are the most common site of DVT origin, though thigh and pelvic DVTs carry higher risk of pulmonary embolism.

  3. During lower extremity arterial duplex imaging, a focal PSV greater than 400 cm/s with a velocity ratio greater than 4:1 compared to the proximal segment indicates what degree of stenosis?

    Answer: Greater than 75%

    A PSV exceeding 400 cm/s with a velocity ratio greater than 4:1 corresponds to a hemodynamically severe stenosis of greater than 75% diameter reduction.

  4. What is the primary B-mode criterion used to diagnose acute DVT on duplex ultrasound?

    Answer: Non-compressibility of the vein with transducer pressure

    Non-compressibility of the vein lumen under transducer pressure is the gold standard B-mode criterion for diagnosing acute DVT.

  5. In the Allen test performed before radial artery harvest, what does a positive (abnormal) result indicate?

    Answer: Inadequate collateral flow to the hand from the ulnar artery

    A positive (abnormal) Allen test indicates that the ulnar artery cannot adequately supply the hand if the radial artery is harvested, contraindicating radial artery use.

  6. Which characteristic distinguishes a pseudoaneurysm from a true aneurysm on duplex ultrasound?

    Answer: Yin-yang color pattern with to-and-fro flow in the neck

    A pseudoaneurysm demonstrates a characteristic 'yin-yang' color pattern within the sac and to-and-fro flow in the communicating neck, distinguishing it from a true aneurysm.

  7. When evaluating a bypass graft with duplex ultrasound, which PSV threshold within the graft body suggests impending graft failure?

    Answer: Less than 45 cm/s

    A mid-graft PSV less than 45 cm/s indicates low flow states associated with high risk of graft thrombosis and impending failure.