The nurse is reviewing the arterial blood gas (ABG) sample for a client admitted with dehydration: pH 7.47 PaCO2 47 mmHg PaO2 88 mmHg HCO3 31 mEq/L The correct interpretation of the ABG results is _____ (Select..)

A. A fully compensated state would require the pH to return to within the normal physiological range of 7.35 to 7.45 while both the PaCO2 and HCO3 remain abnormal. Since the client's pH is 7.47, the body has not yet achieved total homeostatic balance. The presence of a pH outside the normal limits clearly excludes full compensation as a valid interpretation of these specific laboratory findings. B. An uncompensated state occurs when the pH is abnormal and only one of the metabolic or respiratory components is abnormal, while the other remains within its reference range. In this sample, both the PaCO2 at 47 mmHg and the HCO3 at 31 mEq/L are outside their normal limits. This indicates that the secondary system has already begun to respond to the primary imbalance, thus ruling out an uncompensated interpretation. C. These results indicate a partially compensated metabolic alkalosis because the pH is alkaline, the primary bicarbonate (HCO3) is elevated, and the respiratory system is attempting to compensate. The PaCO2 is elevated at 47 mmHg as the lungs retain carbon dioxide to lower the pH. Because the pH remains above 7.45, the compensation is active but not yet successful in returning the blood to a normal acid-base state.