PCU Hemodynamic Monitoring & Vascular Access

Question 1

A PCU patient has an arterial line in place. The nurse notes the waveform is dampened. What is the most appropriate first action?

Accepted Answer

Check for air bubbles, kinks, or loose connections in the tubing

Answer

A dampened arterial waveform is most commonly caused by air bubbles, clots, kinks, or loose connections, which should be assessed and corrected first before other interventions.

Question 2

The phlebostatic axis, used as the reference point for hemodynamic monitoring, is located at the intersection of which anatomical landmarks?

Accepted Answer

The midaxillary line and the 4th intercostal space

Answer

The phlebostatic axis is at the intersection of the midaxillary line and the 4th intercostal space, corresponding to the level of the right atrium.

Question 3

A patient's central venous pressure (CVP) reading is 2 mmHg. Which clinical condition does this finding most likely indicate?

Accepted Answer

Hypovolemia

Answer

A CVP of 2 mmHg is below the normal range of 2–8 mmHg and suggests hypovolemia or decreased venous return.

Question 4

Which of the following is a contraindication to placing a radial arterial line?

Accepted Answer

Positive Allen's test

Answer

A positive Allen's test indicates inadequate collateral circulation from the ulnar artery, making radial arterial line placement unsafe due to risk of hand ischemia.

Question 5

When zeroing an arterial line transducer, the nurse should:

Accepted Answer

Close the stopcock to the patient and open it to air

Answer

Zeroing requires closing the stopcock to the patient and opening it to air (atmospheric pressure) so the monitor can calibrate to zero.

PCU - Progressive Care Unit Certification Practice Test

PCU - Progressive Care Unit Certification Practice Test

PCU Hemodynamic Monitoring & Vascular Access