A 34-year-old woman presents with 2 days of profuse diarrhea after returning from a camping trip. Vital signs show BP 98/62 mm Hg, HR 108 bpm, RR 22/min, temperature 37.2°C, and SpO2 98% on room air. She appears dehydrated with dry mucous membranes. Arterial blood gas reveals pH 7.28, PaCO2 30 mm Hg, HCO3− 14 mEq/L, and serum electrolytes show normal anion gap. She denies vomiting. Which of the following best describes her respiratory status?
- A)Primary respiratory alkalosis with renal compensation
- B)Superimposed respiratory alkalosis
- C)Mixed metabolic alkalosis and respiratory acidosis
- D)Appropriate respiratory compensationGABARITO
- E)Superimposed respiratory acidosis
Explicação
For metabolic acidosis, expected PaCO2 by Winter formula is 1.5 x HCO3− + 8 ± 2, which here is 1.5 x 14 + 8 = 29 ± 2 mm Hg. The measured PaCO2 of 30 mm Hg is appropriate compensation, consistent with primary metabolic acidosis from bicarbonate loss in diarrhea... Ver explicação completa e trilha adaptativa →