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

Maximum systolic pressure, maintained above 120 mmHg

Answer

Minimum diastolic pressure

Answer

Central venous pressure

Question 2

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

Accepted Answer

The balance between oxygen delivery and consumption

Answer

Arterial oxygen levels only

Answer

The amount of carbon dioxide in the blood

Answer

Heart rate adequacy

Question 3

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

Accepted Answer

7.35 to 7.45

Answer

7.0 to 7.2

Answer

7.5 to 7.6

Answer

6.8 to 7.0

Question 4

What does a rising lactate level during bypass indicate?

Accepted Answer

Inadequate tissue perfusion or oxygen delivery

Answer

Excellent perfusion

Answer

Normal metabolic activity

Answer

Excessive anticoagulation

Question 5

What is the purpose of monitoring hematocrit during bypass?

Accepted Answer

To assess blood dilution and oxygen-carrying capacity

Answer

To measure clotting time

Answer

To determine blood type

Answer

To monitor kidney function

Question 6

What is venous reservoir volume and why is it monitored?

Accepted Answer

The volume of blood in the venous reservoir that serves as a safety buffer preventing air embolism

Answer

The total blood volume of the patient

Answer

The amount of cardioplegia remaining

Answer

The fluid in the IV bags