Match the acid-base disturbance with the clinical scenario and arterial blood gases. An individual with a 20-year history of smoking 3 packs/day who has emphysema; pH = 7.37; [HCO3-] = 28 mEq/L; PCO2 = 50 mm Hg
A. metabolic acidosis with respiratory compensation
B. metabolic alkalosis with respiratory compensation
C. respiratory acidosis with renal compensation (chronic respiratory acidosis)
D. respiratory acidosis without renal compensation (acute respiratory acidosis)
E. metabolic acidosis and respiratory acidosis
ANS: C
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