A 17-year-old girl is brought to the emergency department because of nausea, vomiting, and tinnitus after ingesting an unknown number of tablets during an argument with her parents. Arterial blood gas shows pH 7.42, PaCO2 24 mm Hg, and HCO3− 15 mEq/L. Which of the following best describes her acid-base status?
- A)Mixed respiratory alkalosis and metabolic acidosisGABARITO
- B)Mixed respiratory acidosis and metabolic alkalosis
- C)Pure respiratory alkalosis
- D)Pure nonanion gap metabolic acidosis
- E)Pure anion gap metabolic acidosis
Explicação
Salicylate toxicity classically causes a mixed disorder with early respiratory alkalosis due to medullary respiratory center stimulation and a concurrent anion gap metabolic acidosis from organic acid accumulation. A near-normal pH despite markedly low PaCO2 a... Ver explicação completa e trilha adaptativa →