Which of the following make small-volume ultrasonic drug delivery ...

[tnt_battle]

Which of the following make small-volume ultrasonic drug delivery systems different from their large-volume counterparts?
 
  1. They do not use a couplant compartment.
  2. Drugs are placed directly on the transducer.
  3. Battery power is available on some units.
  4. Patient flow, not a blower, carries the aerosol.
  a. 2 and 4 only
  b. 3 and 4 only
  c. 1, 2, and 3 only
  d. 1, 2, 3, and 4

Question 2

Advantages of small-volume ultrasonic nebulizers for drug delivery include which of the follow-ing? 1. Greater respirable drug mass 2. Less dead space and waste 3. Increased mobility 4. Decreased cost
 
  a. 1 and 3 only
  b. 1, 2, and 3 only
  c. 3 and 4 only
  d. 2, 3, and 4 only

[Gabe]

Answer to Question 1

ANS: D
Unlike the larger units, some of these systems do not use a couplant compartment; the medication is placed directly into the manifold on top of the transducer. The transducer is connected by ca-ble to a power source, often battery-powered to increase portability. These devices have no blower; the patient's inspiratory flow draws the aerosol from the nebulizer into the lung.

Answer to Question 2

ANS: B
Both theoretical advantages of the ultrasonic devices are outweighed by relatively high purchase costs and poor reliability.