CVT Peripheral Vascular Assessment 3

Question 1

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

Accepted Answer

Non-compressible calcified vessels

Answer

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

Question 2

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

Accepted Answer

Calf (tibial/peroneal) veins

Answer

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

Question 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?

Accepted Answer

Greater than 75%

Answer

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.

Question 4

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

Accepted Answer

Non-compressibility of the vein with transducer pressure

Answer

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

Question 5

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

Accepted Answer

Inadequate collateral flow to the hand from the ulnar artery

Answer

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.

(CVT) Cardiovascular Technologist Certification Practice Test

(CVT) Cardiovascular Technologist Certification Practice Test

CVT Peripheral Vascular Assessment 3