CCS CCS Cardiopulmonary Bypass and Perfusion Management 2

Question 1

Which cannulation site is most commonly used for venous drainage during standard CPB?

Accepted Answer

Right atrium or inferior vena cava

Answer

Venous drainage for CPB is most commonly obtained from the right atrium or bicaval cannulation of the superior and inferior vena cavae.

Question 2

Protamine sulfate is administered after CPB to reverse which drug?

Accepted Answer

Heparin

Answer

Protamine sulfate neutralizes unfractionated heparin by forming an inactive complex, restoring normal coagulation after bypass.

Question 3

Systemic hypothermia during CPB is used primarily to achieve which physiologic benefit?

Accepted Answer

Reduce metabolic rate and organ oxygen consumption

Answer

Hypothermia decreases cellular metabolic rate and oxygen demand, providing protection to the brain and other organs during reduced perfusion.

Question 4

Which complication of CPB is characterized by diffuse end-organ dysfunction resulting from the systemic inflammatory response to extracorporeal circulation?

Accepted Answer

Post-perfusion syndrome (SIRS after CPB)

Answer

CPB activates complement, cytokines, and leukocytes, causing a systemic inflammatory response syndrome (SIRS) that can impair pulmonary, renal, and neurological function.

Question 5

The left ventricular vent is inserted during CPB primarily to prevent which problem?

Accepted Answer

Left ventricular distension and endocardial ischemia

Answer

The LV vent decompresses the left ventricle during cross-clamping, preventing distension that would increase wall tension and worsen subendocardial ischemia.

CCS - Certified Cardiac Surgeon Practice Test

CCS - Certified Cardiac Surgeon Practice Test

CCS CCS Cardiopulmonary Bypass and Perfusion Management 2