Chapter 16 - Atypical vascular disorders

Question 1

Flow pattern proximal to a fistula

Answer 1

1) increased flow

2) increased diastole

Question 2

Flow pattern after the fistula

Answer 2

1) normal arterial flow

2) maybe more pulsatile

Question 3

Flow pattern through fistula

Answer 3

1) elevated peak
2) elevated end-diastolic velocity
3) spectral broadening
4) bidirectional (turbulent) flow

Question 4

Venous flow approaching AVF

Answer 4

1) elevated velocity

2) phasicity

Question 5

Venous flow away from AVF

Answer 5

1) elevated velocities

2) phasicity

Question 6

Percentage of asymptomatic arterial thoracic outlet compression

Answer 6

25-30%

Question 7

Interpretation of arterial TOS test

Answer 7

Normal = unchanged PPG with maneuvers
Borderline abnormal = reduced waveform with position
Abnormal = complete flattening of waveform