A child with pulmonary atresia exhibits cyanosis with feeding. On reviewing this child's laboratory values, the nurse is not surprised to notice which abnormality?
a. Polycythemia
b. Infection
c. Dehydration
d. Anemia
A
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A Polycythemia is a compensatory response to chronic hypoxia. The body attempts
to improve tissue oxygenation by producing additional red blood cells and
thereby increases the oxygen-carrying capacity of the blood.
B Infection is not a clinical consequence of cyanosis.
C Although dehydration can occur in cyanotic heart disease, it is not a
compensatory mechanism for chronic hypoxia. It is not a clinical consequence of
cyanosis.
D Anemia may develop as a result of increased blood viscosity. Anemia is not a
clinical consequence of cyanosis.
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