Which of the following principles is used by the ultrasonic ...

[Anajune7]

Which of the following principles is used by the ultrasonic nebulizer to produce aerosol droplets?
 
  a. Evaporative cooling
  b. Mechanical baffling
  c. Fractional distillation
  d. High-frequency vibrations

Question 2

Which of the following indicate a potential need for administration of a water or isotonic saline aerosol?
 
  a. Stridor or brassy, crouplike cough
  b. Evidence of increased volume of secretions
  c. Hoarseness after extubation
  d. Patient discomfort after bronchoscopy
  a. 1 and 3 only
  b. 1, 3, and 4 only
  c. 2 and 4 only
  d. 2, 3, and 4 only

[jessofishing]

Answer to Question 1

ANS: D
This crystal transducer converts radio waves into high-frequency mechanical vibrations (sound).

Answer to Question 2

ANS: B
The AARC has published Clinical Practice Guideline: Bland Aerosol Administration. Excerpts are in CPG 38-2.

The presence of one or more of the following may be an use indication for administration of a water or isotonic or hypotonic saline aerosol:
 Stridor
 Brassy, crouplike cough
 Hoarseness after extubation
 Diagnosis of laryngotracheobronc hitis or croup
 History of upper airway irritation and increased work of breathing (e.g., smoke inhalation)
 Patient discomfort associated with airway instrumentation or insult
 Bypassed upper airway
 Need for sputum induction (e.g., Pneumocystis pneumonia or tuberculosis) is an indication for administration of hypertonic saline aerosol.

[Anajune7]

TYSM

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