Which One or More of the Following Devices Are Used

question 16

Multiple Choice

Which one or more of the following devices are used in combination with metered dose inhaler (MDI) therapy to reduce the need for hand-breathing coordination and oropharyngeal impaction of aerosolized drugs?
1) Reservoir devices
2) One-way spacers
3) Valved holding chambers
4) Drying chambers

• A)1 and 3 only
• B)1, 2, and 3 only
• C)3 and 4 only
• D)2, 3, and 4 only

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Definitions:

Average Balance

The mean value derived from summing all balances over a certain period and dividing by the number of periods.

Standard Deviation

A gauge for the level of variance or scattering of values within a dataset.

Exponential Distribution

A continuous probability distribution used to model the time between events in a process where events occur continuously and independently at a constant average rate.

Mean

The average of a set of numbers, computed by dividing the sum of these numbers by the count of numbers in the set.