Toward the End of a Nitrogen Washout Test for Functional

question 27

Multiple Choice

Toward the end of a nitrogen washout test for functional residual capacity, the expired concentration of N₂ begins rising. What does this probably indicate?

• A) The patient is trying too hard.
• B) There is a leak in the system.
• C) The test is nearing completion.
• D) N₂ is being trapped in the lungs.

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