Arterial blood gas results are pH 7.28, PCO2 28 mm Hg, and HCO3- 13 mmol/L. Using Winter's estimate, expected PCO2 is approximately 1.5 × 13 + 8 = 27.5 ± 2 mm Hg. Which interpretation is best?
1Primary metabolic acidosis with appropriate respiratory compensation✓ 정답
2Primary respiratory acidosis with renal compensation
3Primary metabolic alkalosis with respiratory compensation
4Mixed respiratory alkalosis and metabolic alkalosis
해설
The low pH and low bicarbonate identify primary metabolic acidosis. The measured PCO2 is within the expected compensatory range, so there is no laboratory evidence of an additional primary respiratory disorder.