Hypoxia
Too little oxygen reaching the tissues; restlessness is the earliest sign and cyanosis a late one.
Hypoxia is inadequate oxygen delivery at the tissue level, and the brain is the first organ to show it. Restlessness, anxiety, and confusion are early signs, while cyanosis is a late and ominous one — never wait for blue skin to act. Apply oxygen, raise the head of bed, and reposition to optimize ventilation while identifying and treating the underlying cause.
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