If you have to deliver medical gas to a patient from a compressed gas cylinder, which of the fol-lowing devices would you select to control gas flow?
a. Regulator
b. O2 blender
c. Reducing valve
d. Flowmeter
ANS: D
If the goal is to control gas delivery to a patient for O2 therapy or nebulized medication (see Chapters 36 and 38), a flowmeter must also be used.
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