A physician requests that you provide a patient with exactly 40% O2 at a flow of 60 L/min. Lacking a blender, you must manually mix air and O2 to achieve the desired mixture at the pre-scribed flow
Which of the following air and O2 flows would you select?
Air (L/min) O2 (L/min)
a. 45 15
b. 15 45
c. 40 20
d. 20 40
ANS: A
Manually mixing air and oxygen to achieve specified concentration at a given flow.
Use Equation 40-3 to compute the O2 flow.
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