Cardiac Surgery Certification Exam Cardiopulmonary Bypass Techniques 3

Question 1

Protamine is given after cardiopulmonary bypass primarily to:

Accepted Answer

Reverse heparin anticoagulation

Answer

Protamine binds and neutralizes heparin, reversing anticoagulation after the patient is separated from CPB.

Question 2

Which parameter best indicates adequate systemic oxygen delivery during cardiopulmonary bypass?

Accepted Answer

Mixed venous oxygen saturation (SvO2)

Answer

Mixed venous oxygen saturation reflects the balance between oxygen delivery and consumption, making it the best indicator of systemic perfusion adequacy during CPB.

Question 3

What is the purpose of a left ventricular vent during cardiopulmonary bypass?

Accepted Answer

To prevent left ventricular distension and reduce myocardial work

Answer

The LV vent decompresses the left ventricle, preventing distension that can cause myocardial injury when the heart is arrested.

Question 4

Systemic inflammatory response syndrome (SIRS) after CPB is primarily triggered by:

Accepted Answer

Contact activation from blood exposure to the bypass circuit

Answer

Contact of blood with the non-endothelial surfaces of the CPB circuit activates complement and inflammatory cascades, producing post-CPB SIRS.

Question 5

Glucose management during cardiopulmonary bypass is important because hyperglycemia:

Accepted Answer

Worsens neurological outcomes and increases infection risk

Answer

Hyperglycemia during CPB is associated with impaired neurological outcomes and increased risk of wound infection, necessitating tight glycemic control.

Cardiac Surgery Certification Exam Practice Test

Cardiac Surgery Certification Exam Practice Test

Cardiac Surgery Certification Exam Cardiopulmonary Bypass Techniques 3