The following arterial blood gas (ABG) results indicate? pH-7.58 PaCO2-37.5 Pa02-80 HCO3-31.2 BE-(+6.4) 02 Sat - 93%

A. Respiratory acidosis: Respiratory acidosis is characterized by a low pH (45 mm Hg), typically due to hypoventilation or impaired gas exchange. In this ABG, the pH is elevated at 7.58 and PaCO2 is within normal limits (37.5 mm Hg), which does not indicate respiratory acidosis. B. Metabolic alkalosis: Metabolic alkalosis presents with an elevated pH (>7.45) and increased bicarbonate (HCO3 >28 mEq/L). The patient’s pH is 7.58 and HCO3 is 31.2 mEq/L, consistent with metabolic alkalosis. The mild increase in base excess (+6.4) supports metabolic alkalosis, while the near-normal PaCO2 reflects partial respiratory compensation through hypoventilation. C. Normal ABG results: Normal arterial blood gas values are: pH 7.35–7.45, PaCO2 35–45 mm Hg, HCO3 22–28 mEq/L, PaO2 80–100 mm Hg, and O2 saturation 95–100%. This patient’s ABG shows an elevated pH and HCO3, which are outside normal ranges. D. Metabolic acidosis: Metabolic acidosis is indicated by a low pH (<7.35) and decreased HCO3 (<22 mEq/L). The patient’s pH is high (7.58) and HCO3 is elevated, which is opposite the pattern seen in metabolic acidosis, making this option inconsistent with the ABG results.