CNS oxygen toxicity symptoms may present themselves minutes after off gas.

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Multiple Choice

CNS oxygen toxicity symptoms may present themselves minutes after off gas.

Explanation:
CNS oxygen toxicity can show up even after you finish breathing the high-PO2 gas. When you’re exposed to elevated inspired oxygen, the brain is already stressed by the excess oxygen, and the effects can take a short time to become noticeable. Because tissue and brain PO2 don’t drop to normal instantaneously once you switch off the high-PO2 gas, symptoms may appear minutes after off-gassing begins. Early signs like visual changes, dizziness, tingling, twitching, or nausea can occur during exposure or shortly after, and this is why monitoring and quick action during the off-gas period is essential—switch to a lower PO2 and terminate the high-oxygen exposure if any symptoms arise.

CNS oxygen toxicity can show up even after you finish breathing the high-PO2 gas. When you’re exposed to elevated inspired oxygen, the brain is already stressed by the excess oxygen, and the effects can take a short time to become noticeable. Because tissue and brain PO2 don’t drop to normal instantaneously once you switch off the high-PO2 gas, symptoms may appear minutes after off-gassing begins. Early signs like visual changes, dizziness, tingling, twitching, or nausea can occur during exposure or shortly after, and this is why monitoring and quick action during the off-gas period is essential—switch to a lower PO2 and terminate the high-oxygen exposure if any symptoms arise.

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