Heart-Lung Machine Quiz

What is the primary function of a heart-lung machine during cardiac surgery?

• Monitor ECG and blood pressure

• Supply oxygen to the lungs only

• Circulate and oxygenate blood externally

• Pump saline through the coronary arteries

Which component of the heart-lung machine is responsible for oxygenating the blood?

• Heat exchanger

• Oxygenator

• Arterial filter

• Roller pump

What type of pump is commonly used in modern heart-lung machines?

• Roller pump

• Diaphragm pump

• Piston pump

• Gear pump

Which of the following is a major risk associated with heart-lung machine use?

• Increased heart rate

• Hypoglycemia

• Air embolism

• Renal hypertrophy

During cardiopulmonary bypass, which solution is commonly used to stop the heart?

• Normal saline

• Glucose solution

• Cardioplegia solution

• Heparin

What is the function of the heat exchanger in the heart-lung machine?

• Maintain oxygen saturation

• Regulate blood pressure

• Regulate blood temperature

• Sterilize the blood

What anticoagulant is typically administered before initiating cardiopulmonary bypass?

• Aspirin

• Warfarin

• Heparin

• Clopidogrel

Which blood vessel is usually cannulated to return oxygenated blood during bypass?

• Aorta

• Pulmonary vein

• Superior vena cava

• Inferior vena cava

Which of the following is not a function of the heart-lung machine?

• Remove carbon dioxide

• Deliver electrical impulses to the heart

• Pump blood through the body

• Maintain oxygen delivery

Which parameter must be closely monitored to avoid oxygen toxicity during bypass?

• Blood glucose level

• Blood urea level

• Partial pressure of oxygen (pO₂)

• Blood calcium level