When using an SVN or pMDI with NPPV, where in the NPPV circuit ...

[dakota nelson]

When using an SVN or pMDI with NPPV, where in the NPPV circuit should the device be placed to obtain the greatest aerosol deposition?
 
  a. Before the leak port
  b. Anywhere in the circuit
  c. Between the NPPV and the humidifier
  d. Between the leak port and the face mask

Question 2

Which of the following ventilator graphics could be used to assess the response to bronchodilator therapy for a patient receiving mechanical ventilation with VC-CMV?
 
  1. Pressure-time scalar
  2. Flow-time scalar
  3. Pressure-volume loop
  4. Volume-time scalar
  a. 1 and 2 only
  b. 3 and 4 only
  c. 1 and 3 only
  d. 1, 2, and 4 only

[ladyjames123]

Answer to Question 1

ANS: D
To achieve the greatest aerosol deposition when using a pMDI or SVN, the device should be placed close to the patient, between the leak port and the face mask.

Answer to Question 2

ANS: D
With VC-CMV, the volume-time scalar will remain constant. The expiratory portion of the flow-time scalar can show improvement if there is a response to the bronchodilator. The changes in PIP can be monitored with the pressure-time scalar and/or the pressure-volume loop.