Author Question: What happens as the pressure or flow delivered through a small-volume jet nebulizer gets higher? ... (Read 36 times)

hbsimmons88 · **on:** Jul 16, 2018

What happens as the pressure or flow delivered through a small-volume jet nebulizer gets higher?

1. Treatment time becomes shorter.
2. Particle size becomes smaller.
3. Aerosol output becomes greater.
a. 1 and 2 only
b. 1 and 3 only
c. 2 and 3 only
d. 1, 2, and 3

Question 2

Which of the following is false about the optimal technique for using a small-volume jet nebulizer (SVN) for aerosol drug delivery?

a. SVNs are less technique- and de-vice-dependent.
b. Slow inspiration improves SVN aerosol deposition.
c. Deep breathing or breath-holding im-proves SVN deposition.
d. Use of a mouthpiece or mask provides similar results.

catron30 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: D
Within operating limits, the higher the pressure or flow, the smaller is the particle size, the greater is the output, and the shorter is the treatment time.

Answer to Question 2

ANS: C
Use of an SVN is less technique- and device-dependent than use of a pressurized metered dose inhaler or dry powder inhaler delivery system. Slow inspiratory flow does optimize SVN aerosol deposition. However, deep breathing and breath-holding during SVN therapy do little to en-hance deposition over normal tidal breathing. Because the nose is an efficient filter of particles larger than 5 mm, many clinicians prefer not to use a mask for SVN therapy. As long as the pa-tient is mouth-breathing, there is little difference in clinical response between therapy given by mouthpiece and that given by mask.