CCP CPB Circuit Assembly & Priming 2

Question 1

Which type of oxygenator design uses hollow fiber membranes with blood flowing on the outside (shell side) of the fibers?

Accepted Answer

Extraluminal flow membrane oxygenator

Answer

Extraluminal flow (shell-side) oxygenators pass gas through the fiber lumens while blood flows on the outside, providing efficient gas exchange.

Question 2

When calculating the crystalloid prime volume needed to achieve a target hematocrit during CPB, which formula element is NOT required?

Accepted Answer

Patient's serum albumin level

Answer

Serum albumin level is not part of the dilutional hematocrit calculation, which uses patient blood volume, pre-bypass hematocrit, circuit volume, and target hematocrit.

Question 3

What is the primary purpose of incorporating a venous reservoir into the CPB circuit?

Accepted Answer

To provide volume buffer and accommodate fluctuations in venous return

Answer

The venous reservoir acts as a compliance chamber, buffering variations in venous return and preventing air entrainment into the arterial pump.

Question 4

During CPB circuit priming, retrograde autologous priming (RAP) is performed primarily to:

Accepted Answer

Minimize hemodilution by replacing crystalloid prime with patient blood

Answer

RAP replaces crystalloid prime with the patient's own blood, reducing hemodilution and preserving hematocrit and colloid oncotic pressure.

Question 5

A perfusionist notices persistent foaming in the venous reservoir during CPB despite adequate antifoam coating. The most likely cause is:

Accepted Answer

Air entrainment through the venous line or cannula

Answer

Persistent foaming usually indicates air entrainment via loose connections, inadvertent venting, or an inadequately placed venous cannula.

(CCP) Certified Clinical Perfusionist Practice Test

(CCP) Certified Clinical Perfusionist Practice Test

CCP CPB Circuit Assembly & Priming 2