CVP Technical Skills and Equipment Operation 2

Question 1

When setting up a centrifugal pump head for cardiopulmonary bypass, which parameter is the primary determinant of flow output?

Accepted Answer

Revolutions per minute (RPM)

Answer

Inlet pressure

Answer

Outlet resistance

Answer

Fluid viscosity

Question 2

During cardiopulmonary bypass, a sudden rise in arterial line pressure with no change in pump flow most likely indicates:

Accepted Answer

Aortic dissection or cannula obstruction

Answer

Venous air lock

Answer

Oxygenator failure

Answer

Heater-cooler malfunction

Question 3

Which type of oxygenator design is exclusively used in modern clinical cardiopulmonary bypass circuits?

Accepted Answer

Hollow-fiber membrane oxygenator

Answer

Bubble oxygenator

Answer

Screen oxygenator

Answer

Rotating disc oxygenator

Question 4

A perfusionist notices the venous reservoir level is dropping rapidly despite adequate venous return. The most immediate action is to:

Accepted Answer

Reduce pump flow to prevent air entrainment

Answer

Increase cardioplegia delivery rate

Answer

Switch to the backup pump head

Answer

Increase arterial flow to compensate

Question 5

The purpose of an arterial line filter in a CPB circuit is to:

Accepted Answer

Remove microemboli and gaseous emboli before they reach the patient

Answer

Regulate arterial blood pressure

Answer

Measure oxygen saturation of perfusate

Answer

Control perfusate temperature

Question 6

During rewarming on CPB, the maximum recommended temperature gradient between the heater-cooler water temperature and the patient's blood temperature is:

Accepted Answer

10°C

Answer

20°C

Answer

5°C

Answer

15°C

Question 7

Which monitoring parameter is most useful for detecting venous air lock during cardiopulmonary bypass?

Accepted Answer

Sudden decrease in venous return with distended venous line

Answer

Rising arterial line pressure

Answer

Decreasing pump RPM

Answer

Increasing mixed venous oxygen saturation