A client is admitted to the emergency room with a respiratory rate of 7/min. Arterial blood gases (ABG) reveal the following values. Which of the following is an appropriate analysis of the ABGs? pH 7.22, PaCO2 68 mm Hg, Base excess -2, PaO2 78 mm Hg, Saturation 80%, Bicarbonate 26 mEq/L

The correct answer is A: Respiratory acidosis. The low respiratory rate (hypoventilation) leads to retention of CO2, resulting in high PaCO2 (normal range 35-45 mm Hg) and low pH. The pH of 7.22 indicates acidosis. Additionally, the PaO2 of 78 mm Hg is slightly low, indicating hypoxemia, commonly seen in respiratory acidosis. Base excess of -2 suggests a compensatory mechanism to increase bicarbonate levels. Bicarbonate of 26 mEq/L is within the normal range, supporting the primary respiratory acidosis. Other choices are incorrect as they do not align with the ABG values provided. Metabolic acidosis (choice B) would have a low bicarbonate level, and metabolic alkalosis (choice C) would have a high bicarbonate level. Respiratory alkalosis (choice D) would have a low PaCO2 and a high pH.