Chapter 12 - Duplex of upper extremity

Question 1

Position for upper extremity duplex

Answer 1

Externally rotated
45 degree angle from body
Pledge position

Question 2

Test for steal using PPG

Answer 2

Test at least flow in two digits
before and after occlusion of graft

an improvement with occlusion is steal

Question 3

Brachial artery reactivity testing principle

Answer 3

Assesses ability of endothelium to regulate vasodilation
Measure degree to which brachial artery dilates to hyperemia
1) inflate cuff on forearm to 250 mmHg for 4.5-5 min
2) measure diameter of brachial artery

Question 4

What does positive endothelial dysfunction in brachial artery mean

Answer 4

Higher than normal incidence of long-term coronary events

Question 5

Normal brachial artery endothelium

Answer 5

Increase by > 10% diameter with compression

Question 6

Abnormal brachial artery endothelium

Answer 6

Increase < 6% diameter with compression

Question 7

Criteria for classifying upper extremity disease

Answer 7

None for upper extremity