A 20-year-old college student comes to the emergency department because of chest tightness, dizziness, and tingling in both hands that began during an exam. She is visibly anxious and breathing rapidly. Arterial blood gas shows pH 7.55, PaCO2 25 mm Hg, and HCO3− 22 mEq/L. Which of the following acid-base disorders is most likely present?
- A)Acute respiratory acidosis
- B)Anion gap metabolic acidosis
- C)Metabolic alkalosis
- D)Acute respiratory alkalosisGABARITO
- E)Chronic respiratory alkalosis
Explicação
Hyperventilation during a panic attack causes excessive CO2 loss, leading to an acute respiratory alkalosis. The elevated pH and low PaCO2 with only minimal change in bicarbonate indicate an acute rather than chronic process. Ver explicação completa e trilha adaptativa →