Which of the following are clinical signs and symptoms of inadequate airway humidification? 1. Atelectasis 2. Dry cough 3. Increased airway resistance 4. Increased incidence of infection 5. Increased work of breathing
a. 2, 3, and 4 only
b. 1, 2, and 3 only
c. 3, 4, and 5 only
d. 1, 2, 3, 4, and 5
Q. 2 Which of the following are true about humidification and contact time?
1. The longer a gas is exposed to water, the greater is the amount of evaporation.
2. The rate of gas flow through a humidifier determines contact time.
3. Low flows decrease and high flows increase relative humidity output.
4. Bubble humidifier contact time depends on the water column depth.
a. 1 and 3 only
b. 1, 2, and 4 only
c. 3 and 4 only
d. 1, 2, 3, and 4
Q. 3 Which of the following types of humidifiers are used in clinical practice? 1. Heat and moisture exchanger 2. Passover humidifier 3. Bubble humidifier
a. 1 and 2 only
b. 2 and 3 only
c. 1 and 3 only
d. 1, 2, and 3
Q. 4 Clinical indications for delivering cool humidified gas include which of the following? 1. Postextubation edema 2. Upper airway inflammation 3. Croup (laryngotracheal bronchitis) 4. Epiglottitis
a. 2, 3, and 4 only
b. 1, 2, and 3 only
c. 1, 2, 3, and 4
d. 2 and 3 only
Q. 5 What device adds molecular water to gas?
a. Agitator
b. Humidifier
c. Nebulizer
d. Atomizer
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