Mechanical Ventilators

What is the primary function of a mechanical ventilator?

• To provide medication

• To replace or assist in spontaneous breathing

• To monitor heart rate

• To measure blood pressure

What type of blood flows from the right atrium to the lungs?

• Nutrient-rich blood

• Deoxygenated blood

• Carbonated blood

• Oxygenated blood

In which lung zone does blood flow intermittently during the cardiac cycle?

• Zone 1

• Zone 2

• Zone 3

• Zone 4

What happens if the pressure at the patient connection exceeds 125 cmH2O?

• The ventilator shuts down

• Patient is disconnected

• The pressure is maintained

• An alarm sounds

What is the significance of the physiological dead space volume?

• It participates in gas exchange

• It does not participate in gas exchange

• It increases tidal volume

• It decreases respiratory rate

Do arteries always carry oxygenated blood?

• Yes, all arteries carry oxygenated blood.

• Yes, except in the lungs.

• No, only systemic arteries carry deoxygenated blood

• No, pulmonary arteries carry deoxygenated blood

What occurs to the alveolar pressure during normal expiration?

• It decreases to negative pressure

• It increases to positive pressure

• It remains constant

• It fluctuates wildly

In which zone of the lung does blood flow continuously?

• Zone 1

• Zone 2

• Zone 3

• Zone 4

How does the diaphragm contribute to expiration?

• It creates a vacuum in the chest

• It contracts to pull air in

• It relaxes, causing the lungs to compress

• It remains static during expiration

What is the primary purpose of a pressure sensor in the patient circuit?

• To measure oxygen levels

• To provide feedback for maintaining PEEP

• To control respiratory rate

• To monitor heart rate