CVP Hemodynamics and Monitoring

Question 1

What is mean arterial pressure (MAP) and what is the target during bypass?

Accepted Answer

The average arterial pressure during a cardiac cycle, typically maintained at 50-80 mmHg during bypass

Answer

MAP represents the average pressure driving blood through organs. During bypass, it is typically maintained between 50-80 mmHg to ensure adequate organ perfusion.

Question 2

What does mixed venous oxygen saturation (SvO2) indicate during bypass?

Accepted Answer

The balance between oxygen delivery and consumption

Answer

SvO2 reflects the balance between oxygen delivery and tissue consumption. Low values indicate inadequate perfusion or increased oxygen demand.

Question 3

What is the normal range for blood gas pH during cardiopulmonary bypass?

Accepted Answer

7.35 to 7.45

Answer

Maintaining pH in the normal range of 7.35-7.45 during bypass is essential for proper enzyme function and cellular metabolism.

Question 4

What does a rising lactate level during bypass indicate?

Accepted Answer

Inadequate tissue perfusion or oxygen delivery

Answer

Rising lactate indicates that tissues are not receiving adequate oxygen and are relying on anaerobic metabolism, suggesting inadequate perfusion.

Question 5

What is the purpose of monitoring hematocrit during bypass?

Accepted Answer

To assess blood dilution and oxygen-carrying capacity

Answer

Hematocrit reflects the proportion of red blood cells in the blood, indicating oxygen-carrying capacity. Excessive hemodilution may require blood transfusion.

(CVP) Cardiovascular Perfusionist Practice Test

(CVP) Cardiovascular Perfusionist Practice Test

CVP Hemodynamics and Monitoring