A metered dose inhaler should be held away from the mouth during ...

[kaid0807]

A metered dose inhaler should be held away from the mouth during actuation to:
 
  a. decrease the effect of inertial impaction on the particles.
  b. decrease the effect of gravity on the parti-cles.
  c. ensure deposition in the oropharynx.
  d. prevent cross-contamination.

Question 2

One criterion for the use of a dry-powder inhaler is the patient's ability to:
 
  a. coordinate inspiration with actuation.
  b. hold the dry-powder inhaler 4 cm from the mouth.
  c. empty the powder into the dry-powder inhaler.
  d. inspire at flows greater than 40 L/min.

[tuwy]

Answer to Question 1

ANS: A
This technique will decrease the effect of inertial impaction on the particles in the oropharynx.

Answer to Question 2

ANS: D
The most critical factor in passive dry-powder inhaler use is the need for high inspiratory flow. Patients must generate inspiratory flows of at least 40 to 60 L/min to produce a respirable powder aerosol.

[kaid0807]

Excellent

[alexanderhamilton]

TYSM