The Shape of the Expired CO₂ Tracing of a Patient

question 62

Multiple Choice

The shape of the expired CO₂ tracing of a patient is normal but instead of being zero, the baseline is elevated to approximately 12 mm Hg. Which of the following is the most likely problem?

• A) Patient disconnected from the system
• B) Obstruction of the sampling tube
• C) Rebreathing
• D) Presence of N₂O

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Definitions:

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