The nurse has admitted a child with tricuspid atresia. The nurse would expect which initial lab result?
1. A high hemoglobin
2. A low hematocrit
3. A high white blood cell count
4. A low platelet count
Correct Answer: 1
Rationale: The child's bone marrow responds to chronic hypoxemia by producing more red blood cells to increase the amount of hemoglobin available to carry oxygen to the tissues. This occurs in cases of cyanotic heart defects such as tricuspid atresia. Therefore, the hematocrit would not be low, the white blood cell count would not be high (unless an infection were present), and the platelets would be normal.
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