ATI Fluid Electrolyte and Acid-Base Regulation Related

Review ATI Fluid Electrolyte and Acid-Base Regulation related questions and content

You are an emergency-room nurse caring for a trauma patient. Your patient has the following arterial blood gas results: pH 7.26, PaCO2 28, HCO3 11 mEq/L. How would you interpret these results?

  • A. Respiratory acidosis with no compensation
  • B. Metabolic alkalosis with a compensatory alkalosis
  • C. Metabolic acidosis with no compensation
  • D. Metabolic acidosis with a compensatory respiratory alkalosis
Correct Answer: D

Rationale: To interpret the given ABG results:
1. pH <7.35 indicates acidosis.
2. PaCO2 <35 indicates respiratory alkalosis.
3. HCO3 <22 indicates metabolic acidosis.
Therefore, the ABG results show metabolic acidosis (low pH, low HCO3) with compensatory respiratory alkalosis (low PaCO2). This means the body is trying to compensate for the metabolic acidosis by decreasing PaCO2 through hyperventilation. Option D is correct. Options A, B, and C are incorrect as they do not align with the ABG results and the principles of acid-base balance.