What are the CCA PSV and ICA/CCA ratio associated with a 50% stenosis?

Prepare for the WCUI/Smith Chason Exit Assessment – Abdomen, Vascular, OB/GYN Test. Enhance your study with flashcards and detailed multiple choice questions, complete with hints and explanations. Master your exit exam with confidence!

Multiple Choice

What are the CCA PSV and ICA/CCA ratio associated with a 50% stenosis?

Explanation:
In carotid duplex assessment, how severe a stenosis is tends to show up in flow velocities. As narrowing in the internal carotid progresses, the peak systolic velocity in the ICA rises, and the ICA/CCA velocity ratio climbs. For about half-sheit stenosis (roughly 50%), you typically see an ICA peak systolic velocity in the range of 125 to 230 cm/s, and the ICA/CCA ratio around 2.0 to 4.0. This combination reflects that the artery is narrowed enough to accelerate flow, but not so severely that the velocity soars beyond these thresholds. If you saw a higher velocity above 230 cm/s with an ICA/CCA ratio above 4.0, that would point to a more significant stenosis, not just 50%. A ratio near 1.0–2.0 or a much lower velocity would suggest less than 50% stenosis. So the range 125–230 cm/s together with a 2.0–4.0 ICA/CCA ratio best matches a 50% stenosis.

In carotid duplex assessment, how severe a stenosis is tends to show up in flow velocities. As narrowing in the internal carotid progresses, the peak systolic velocity in the ICA rises, and the ICA/CCA velocity ratio climbs. For about half-sheit stenosis (roughly 50%), you typically see an ICA peak systolic velocity in the range of 125 to 230 cm/s, and the ICA/CCA ratio around 2.0 to 4.0. This combination reflects that the artery is narrowed enough to accelerate flow, but not so severely that the velocity soars beyond these thresholds.

If you saw a higher velocity above 230 cm/s with an ICA/CCA ratio above 4.0, that would point to a more significant stenosis, not just 50%. A ratio near 1.0–2.0 or a much lower velocity would suggest less than 50% stenosis. So the range 125–230 cm/s together with a 2.0–4.0 ICA/CCA ratio best matches a 50% stenosis.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy