A 31-year-old man is found unresponsive with pinpoint pupils and shallow respirations next to an empty oxycodone bottle. Vital signs show BP 92/58, HR 52, RR 8, SpO2 88%. Arterial blood gas reveals pH 7.18, PaCO2 68 mm Hg, HCO3− 25 mEq/L. Chest X-ray shows no infiltrates. He denies recent renal disease. Which acid-base disturbance best describes his condition?
- A)Chronic respiratory acidosis
- B)Mixed respiratory alkalosis and metabolic acidosis
- C)Metabolic alkalosis
- D)Acute metabolic acidosis
- E)Acute respiratory acidosisGABARITO
Explicação
Opioid intoxication causes hypoventilation with acute carbon dioxide retention, producing an acute respiratory acidosis. The bicarbonate is not substantially elevated, which indicates there has not been enough time for significant renal compensation. Ver explicação completa e trilha adaptativa →