Proper use of a dry powder inhaler (DPI) requires that the ...

[james0929]

Proper use of a dry powder inhaler (DPI) requires that the patient be able to do which of the fol-lowing?
 
  a. Generate inspiratory flows of 60 L/min or higher.
  b. Exhale forcibly through the device before drug delivery.
  c. Inhale slowly (<0.5 L/sec) and perform a breath-hold.
  d. Coordinate firing of the DPI with inspira-tion.

Question 2

After actuating a metered dose inhaler with a holding chamber, what should the patient be in-structed to do?
 
  a. Take a large breath and hold it for at least 5 sec.
  b. Continue to breathe through the device for three breaths.
  c. Immediately exhale as fast and as much as possible.
  d. Take one quick breath and remove the holding chamber.

[srodz]

Answer to Question 1

ANS: A
Individual doses are inhaled as soon as the seal is broken. The high peak inspiratory flow rates (>60 L/min) required to dispense the drug powder from most current DPI designs result in a pharyngeal dose comparable with that received from a typical pressurized metered dose inhaler without an add-on device.

Answer to Question 2

ANS: B
With normal breathing, actuate the pMDI once and have the patient breathe through the device for three to seven breaths (three breaths for adults and seven breaths for infants).