CVP Patient Safety and Equipment 2

Question 1

What is the role of a centrifugal pump versus a roller pump in bypass?

Accepted Answer

Centrifugal pumps are less likely to cause massive air embolism and generate less hemolysis; roller pumps are simpler and less expensive

Answer

Centrifugal pumps generate flow through a spinning vortex and will not pump significant air, while roller pumps use occlusive compression and can pump air if the reservoir empties.

Question 2

What is tubing spallation and why is it a concern?

Accepted Answer

The release of particles from the inner surface of pump tubing into the blood due to roller pump compression

Answer

Spallation occurs when roller pump compression damages the inner tubing surface, releasing microparticles into the patients blood that can cause organ damage.

Question 3

What emergency procedures should be followed if there is a power failure during bypass?

Accepted Answer

Immediately switch to hand cranking the pump while activating backup power systems

Answer

In a power failure, the perfusionist must immediately hand-crank the pump to maintain circulation while backup power (UPS/generator) activates.

Question 4

What is the purpose of the cardiotomy suction system?

Accepted Answer

To collect blood from the surgical field for processing and return to the patient

Answer

Cardiotomy suction collects shed blood from the operative field, which is then filtered and returned to the bypass circuit for reinfusion.

Question 5

What infection control measures are essential for the bypass circuit?

Accepted Answer

Aseptic technique during circuit assembly, sterile components, and antibiotic prophylaxis

Answer

The entire bypass circuit must be assembled using aseptic technique with sterile, single-use components to prevent bloodstream infections.

(CVP) Cardiovascular Perfusionist Practice Test

(CVP) Cardiovascular Perfusionist Practice Test

CVP Patient Safety and Equipment 2