All of the following clinical signs may be present with hypoxia. However, only two are specific indicators of hypoxia (that is, if they are present, it means that the patient is probably hypoxic). Which ones are specific indicators of hypoxia?
1) Feelings of anxiety
2) Crackles in the lung bases
3) Increased heart rate
4) Improved breathing in upright position
ANS: 1, 3
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