One of the early signs of the effect of hypoxemia on the nervous system is:
a. cyanosis.
b. restlessness.
c. tachycardia.
d. tachypnea.
B
Decreased oxygenation to the nervous system may result in restlessness and agitation—early signs of hypoxemia. Cyanosis is a late sign. Tachycardia and tachypnea may occur, but CNS changes tend to occur earlier.
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