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


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.

Health Professions

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