It is important to observe for cyanosis as a sign of hypoxemia. Which of the following choices provides the most useful description of this condition? Cyanosis is:

1. produced by low oxygen levels in the blood.
2. often seen as circumoral bluish discoloration of the skin.
3. directly related to the amount of hemoglobin in the blood, in the presence of oxygen deficit.
4. generally associated with other signs of oxygen deficit.


ANS: 3

Nursing

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