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CNOR Certification Exam
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During a procedure with sedation, the perioperative nurse observes a sudden drop in the end-tidal CO2 (EtCO2) waveform on the capnography monitor, which quickly becomes a flat line. This finding is the earliest and most reliable indicator of what condition?
Hypertensive crisis
Apnea or total airway obstruction
Malignant hyperthermia
Anaphylactic reaction
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Correct Answer:
Apnea or total airway obstruction
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