A Physician Orders a 70% He:30% O₂ Mixture to Reduce

question 49

Multiple Choice

A physician orders a 70% He:30% O₂ mixture to reduce the work of breathing in a patient having an acute asthmatic attack. Which of the following delivery systems would be appropriate in this case?

• A)adult O₂ tent at 15 L/min
• B)aerosol mask at 12 L/min
• C)nasal cannula at 6 L/min
• D)nonrebreathing mask at 10 L/min

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Definitions:

Sink

A basin used for washing and typically connected to a water supply and drainage system.

Xylem

The tissue in plants that transports water and some nutrients from the roots to the leaves.

Bundle Scars

Marks left on the stem of a plant where vascular bundles or leaf traces have broken off or been removed.

Leaf Scar

Marks on a stem left when the petiole of a leaf breaks during abscission.