Practice Test Geeks(VT) Vascular Technician Certification Practice Test
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Non-Invasive Testing Procedures Flashcards

7 cards from real VT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which duplex ultrasound finding is characteristic of vertebral artery steal syndrome (subclavian steal)?

    Answer: Complete reversal of flow direction in the ipsilateral vertebral artery

    Subclavian steal causes complete flow reversal in the ipsilateral vertebral artery as it supplies the arm via retrograde flow.

  2. In segmental pressure testing of the lower extremity, a pressure gradient of 30 mmHg between adjacent cuffs is considered:

    Answer: Significant, suggesting stenosis at that level

    A gradient ≥20–30 mmHg between adjacent cuff levels indicates hemodynamically significant disease at that segment.

  3. When performing a venous duplex exam of the saphenofemoral junction (SFJ), what maneuver is used to provoke reflux?

    Answer: Valsalva maneuver or manual calf compression with release

    Valsalva maneuver or manual compression-release augments venous flow and unmasks reflux at the SFJ when reversed flow exceeds 0.5 seconds.

  4. Which finding on transcranial Doppler (TCD) is MOST consistent with vasospasm following subarachnoid hemorrhage?

    Answer: MCA mean flow velocity > 120 cm/s with Lindegaard ratio > 3

    MCA velocity >120 cm/s and Lindegaard ratio (MCA/ICA) >3 distinguish vasospasm from hyperemia.

  5. A non-compressible vessel with an ABI of 1.4 is MOST likely due to:

    Answer: Medial arterial calcification (Mönckeberg sclerosis)

    Medial calcification makes vessels incompressible, falsely elevating ABI >1.30; toe-brachial index (TBI) should be used instead.

  6. During renal artery duplex scanning, which PSV threshold is MOST commonly used to suggest hemodynamically significant renal artery stenosis (>60%)?

    Answer: >180 cm/s

    A renal artery PSV >180 cm/s with a RAR (renal-to-aortic ratio) >3.5 suggests ≥60% stenosis.

  7. What is the PRIMARY advantage of using photoplethysmography (PPG) over standard segmental pressures in diabetic patients?

    Answer: PPG detects skin perfusion and is unaffected by medial calcification

    PPG measures skin blood flow optically and is not affected by vessel wall calcification that falsifies cuff pressure readings.

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