A patient receiving mechanical ventilation has a capnometer in-line at the Y-connector of the vent circuit for continuous monitoring of exhaled CO2. The capnogram suddenly indicates an abrupt decrease in the PETCO2 from 5.3% to 0.0%. The respiratory therapist should
A. replace the exhalation valve.
B. decrease the humidifier temperature setting.
C. remove the inline medication nebulizer.
D. reattach the patient to the circuit.
Answer: D. reattach the patient to the circuit.
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