The nurse is evaluating the activity tolerance of a 9-month-old with iron deficiency anemia. Which finding indicates that the infant is not tolerating activity?
1. Heart rate of 138
2. Increased alertness
3. Respiratory rate less than 40 with activity
4. Muscle weakness
Correct Answer: 4
Rationale: Iron deficiency anemia can result in less oxygen reaching the cells and tissues, causing activity intolerance. An indication that a 9-month-old child is not tolerating activity and that iron deficiency anemia is worsening would be the presence of muscle weakness during activity. A heart rate of 138, increased alertness, and a respiratory rate of less than 40 with activity are all signs that iron deficiency anemia is resolving and activity tolerance is improving.
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