VA-BC Ultrasound Guidance 3

Question 1

A nurse using Doppler ultrasound observes color flow moving away from the probe shown in blue. This color coding represents:

Accepted Answer

Flow moving away from the probe

Answer

In standard color Doppler, blue represents flow moving away from the probe, while red represents flow toward the probe (BART: Blue Away, Red Toward).

Question 2

Which ultrasound finding is most consistent with deep vein thrombosis (DVT) in an upper extremity vein?

Accepted Answer

Hyperechoic intraluminal material with non-compressibility

Answer

DVT typically appears as echogenic (hyperechoic) intraluminal material and the vein fails to compress under probe pressure.

Question 3

When using the short-axis (transverse) ultrasound view for needle guidance, what is the main limitation compared to the long-axis view?

Accepted Answer

The needle tip cannot be distinguished from the shaft

Answer

In the short-axis view, only a cross-section of the needle is seen, making it difficult to confirm whether the needle tip or shaft is visualized at any given moment.

Question 4

A patient's basilic vein measures 3 mm in diameter on ultrasound. According to best practice guidelines, this vein is:

Accepted Answer

Too small for PICC placement per standard guidelines

Answer

Standard PICC insertion guidelines recommend a minimum vein diameter of at least 4–5 mm to reduce thrombosis risk and allow for adequate catheter-to-vein ratio.

Question 5

During ultrasound-guided PICC placement, posterior wall puncture is confirmed when:

Accepted Answer

Blood return is absent and the needle tip is visualized exiting the deep vessel wall

Answer

Posterior wall puncture occurs when the needle passes through both vessel walls; ultrasound shows the tip beyond the deep vessel wall and blood return may be absent or minimal.

(VA-BC) Vascular Access Nurse Certification Practice Test

(VA-BC) Vascular Access Nurse Certification Practice Test

VA-BC Ultrasound Guidance 3