CVP Technical Skills and Equipment Operation 4

Question 1

Pulsatile flow during cardiopulmonary bypass is thought to benefit patients primarily by:

Accepted Answer

Improving microcirculatory perfusion and reducing systemic vascular resistance

Answer

Pulsatile flow more closely mimics physiologic circulation and may improve microvascular flow, organ perfusion, and reduce inflammatory response.

Question 2

Which measurement best reflects the adequacy of systemic oxygen delivery during cardiopulmonary bypass?

Accepted Answer

Mixed venous oxygen saturation (SvO2)

Answer

SvO2 reflects the balance between oxygen delivery and consumption; values below 65–70% indicate inadequate delivery for metabolic demand.

Question 3

The main advantage of a hard-shell venous reservoir over a soft collapsible bag reservoir is:

Accepted Answer

It provides a built-in air-fluid interface that facilitates de-airing and gas removal

Answer

Hard-shell reservoirs maintain a fixed volume with an open air-fluid interface, enabling passive gas venting and visual monitoring of reservoir level.

Question 4

During CPB, metabolic acidosis detected on blood gas analysis is best initially corrected by:

Accepted Answer

Increasing pump flow to improve oxygen delivery

Answer

Metabolic acidosis during CPB often indicates inadequate perfusion; increasing pump flow to correct oxygen delivery is the primary intervention before pharmacologic treatment.

Question 5

A perfusionist uses pH-stat blood gas management during deep hypothermia. This means:

Accepted Answer

PaCO2 is maintained at 40 mmHg and pH at 7.40 corrected to patient temperature, requiring CO2 addition

Answer

pH-stat management corrects blood gas values to the patient's actual temperature and adds CO2 to maintain pH 7.40 and PaCO2 40 mmHg, promoting cerebral vasodilation.

(CVP) Cardiovascular Perfusionist Practice Test

(CVP) Cardiovascular Perfusionist Practice Test

CVP Technical Skills and Equipment Operation 4