In general, to deliver O2 to the upper airway, a bubble ...

[Arii_bell]

In general, to deliver O2 to the upper airway, a bubble humidifier is required only when the gas flow exceeds which of the following?
 
  a. 1 L/min
  b. 2 L/min
  c. 3 L/min
  d. 4 L/min

Question 2

Key considerations in selecting or recommending humidity or bland aerosol therapy for a patient include which of the following?
 
  1. Required gas flow
  2. Presence of an artificial tracheal airway
  3. Character of pulmonary secretions
  4. Need for or duration of mechanical ventilation
  5. Presence of heat and moisture exchanger (HME) contraindications
  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

[enass]

Answer to Question 1

ANS: D
Regarding delivery of O2 to the upper airway, the American College of Chest Physicians advises against using a bubble humidifier at flow rates of 4 L/min or less.

Answer to Question 2

ANS: D
Key considerations include (1) gas flow, (2) presence or absence of an artificial tracheal airway, (3) character of the pulmonary secretions, (4) need for and expected duration of mechanical ven-tilation, and (5) contraindications to using an HME.

[Arii_bell]

TYSM

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