A child with croup has an increased PaCO2, a decreased pH, and a normal H2CO3 blood-gas value. The nurse interprets this as uncompensated:
1. Respiratory acidosis.
2. Respiratory alkalosis.
3. Metabolic acidosis.
4. Metabolic alkalosis.
1. Respiratory acidosis.
Rationale:
If the pH is decreased and the PaCO2 is increased with a normal H2CO3, it is uncompensated respiratory acidosis. In addition, croup can be a disease process that causes respiratory acidosis. Uncompensated respiratory alkalosis has an increased pH, decreased PaCO2, and normal H2CO3. Uncompensated metabolic acidosis has a decreased pH, normal PaCO2, and normal H2CO3. Uncompensated metabolic alkalosis has an increased pH, normal PaCO2, and increased H2CO3.
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