If a patient's end-tidal CO2 is below 35 mmHg, the patient is described as which of the following?

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Multiple Choice

If a patient's end-tidal CO2 is below 35 mmHg, the patient is described as which of the following?

Explanation:
End-tidal CO2 below 35 mmHg indicates hypocapnia, a low CO2 state. EtCO2 reflects arterial CO2 and normally sits roughly 35–45 mmHg. When ventilation exceeds CO2 production—such as during hyperventilation—CO2 is expelled faster than it’s formed, lowering EtCO2. So the description fitting this situation is hypocapnic. The other terms describe different states: hypercapnic means high CO2, normocapnic means normal CO2, and hypoxic refers to low oxygen, not CO2.

End-tidal CO2 below 35 mmHg indicates hypocapnia, a low CO2 state. EtCO2 reflects arterial CO2 and normally sits roughly 35–45 mmHg. When ventilation exceeds CO2 production—such as during hyperventilation—CO2 is expelled faster than it’s formed, lowering EtCO2. So the description fitting this situation is hypocapnic. The other terms describe different states: hypercapnic means high CO2, normocapnic means normal CO2, and hypoxic refers to low oxygen, not CO2.

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