Vascular Testing and Imaging

Question 1

What does the Ankle Brachial Index (ABI) measure?

Answer 1

peripheral tissue perfusion to rule out arterial disease

Ratio of systolic BP of the LE to SBP of the the UE

Question 2

What does Continuous Wave Doppler do?

Answer 2

determines velocity of bloodflow direction (to determine severity of PVD)

Question 3

What does Transcutaneous Oxygen Measure determine?

Answer 3

provides a measure of tissue hypoxia by looking at O2 tension of skin (mmHg)
Provides a predictor of wound healing success or failure

Question 4

What does Arterial and Venous Duplex Scanning do?

Answer 4

Provide an accurate localization and quantification of lesions (differentiates stenosis from occlusions)

Question 5

What does Laser Doppler measure?

Answer 5

skin/microvascular perfusion during and after bypass

Question 6

What does Magnetic Resonance Angiography (MRA) measure?

Answer 6

LE ischemia in pts with a contraindication to standard contrast angiography

Question 7

What does Computed Tompgraphy Angiography measure?

Answer 7

uses x-rays to visualize blood flow in arterial and venous vessels (used to detect clots in veins or narrowing of arteries)

Question 8

What does a positive claudication test indicate?

How is it performed?

Answer 8

arterial involvement

ambulate on treadmill and note time or distance at which pain occurs

Question 9

What does a positive capillary refill test indicate? What is normal?

Answer 9

surface arterial bloodflow

3 sec or less

Question 10

What does a positive Homans sign test indicate?

Answer 10

DVT