Interpret the following ABG: pH 7.44, PaCo2 48mmHg, HCO3 30 Meq/L
normal ABG
metabolic acidosis
metabolic alkalosis
respiratory acidosis
The Correct Answer is C
Rationale:
A. Normal ABG would have pH between 7.35–7.45, PaCO₂ between 35–45 mmHg, and HCO₃⁻ between 22–26 mEq/L. This ABG is not fully normal.
B. Metabolic acidosis is characterized by low pH and low HCO₃⁻, which is not the case here.
C. Metabolic alkalosis shows elevated HCO₃⁻ (30 mEq/L) and a near-normal but slightly alkalotic pH (7.44). The elevated PaCO₂ (48 mmHg) suggests partial respiratory compensation.
D. Respiratory acidosis would have a low pH and high PaCO₂, which doesn't match this ABG.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Rationale:
A. Normal ABG would have pH between 7.35–7.45, PaCO₂ between 35–45 mmHg, and HCO₃⁻ between 22–26 mEq/L. This ABG is not fully normal.
B. Metabolic acidosis is characterized by low pH and low HCO₃⁻, which is not the case here.
C. Metabolic alkalosis shows elevated HCO₃⁻ (30 mEq/L) and a near-normal but slightly alkalotic pH (7.44). The elevated PaCO₂ (48 mmHg) suggests partial respiratory compensation.
D. Respiratory acidosis would have a low pH and high PaCO₂, which doesn't match this ABG.
Correct Answer is C
Explanation
Rationale:
A. Chloride 105 mEq/L is within the normal range (98–106 mEq/L) and does not require reporting.
B. Calcium 9.6 mEq/L is a normal calcium level (normal range: 8.5–10.5 mEq/L).
C. Sodium 151 mEq/L is above the normal sodium range (135–145 mEq/L) and indicates hypernatremia. This could affect neurological function and fluid balance, especially important to correct prior to surgery.
D. Potassium 3.8 mEq/L is within the normal range (3.5–5.0 mEq/L).
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