A 60-year-old woman complains of persistent breathing difficulties. Her laboratory studies show: pH 7.36; [H⁺] 44 nmol/L; PaCO₂ 55 mmHg; [HCO₃^-] 30 mmol/L. Which of the following is the most likely diagnosis? A) Combined metabolic acidosis and respiratory acidosis B) Primary respiratory acidosis, secondary metabolic alkalosis, full pH compensation C) Primary respiratory acidosis, secondary metabolic alkalosis, partial pH compensation D) Pure metabolic acidosis without pH compensation E) Pure respiratory acidosis

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The Answer of A 60-year-old woman complains of persistent breathing difficulties. Her laboratory studies show: pH 7.36; [H⁺] 44 nmol/L; PaCO₂ 55 mmHg; [HCO₃^-] 30 mmol/L. Which of the following is the most likely diagnosis? A) Combined metabolic acidosis and respiratory acidosis B) Primary respiratory acidosis, secondary metabolic alkalosis, full pH compensation C) Primary respiratory acidosis, secondary metabolic alkalosis, partial pH compensation D) Pure metabolic acidosis without pH compensation E) Pure respiratory acidosis

A 60-Year-Old Woman Complains of Persistent Breathing Difficulties