A client is admitted for a diagnosis of sepsis secondary to a urinary tract infection. The client's repeat ABG is: pH 7.37, PC02 30, HCO3 of 18. Which acid-base imbalance is the client exhibiting?
normal ABG
respiratory acidosis
metabolic alkalosis
metabolic acidosis
The Correct Answer is D
Rationale:
A. The pH is at the lower limit of normal but combined with low bicarbonate indicates imbalance, so not normal.
B. Respiratory acidosis would show increased PaCO₂, but here PaCO₂ is low.
C. Metabolic alkalosis is characterized by elevated bicarbonate, which is not present.
D. Metabolic acidosis is indicated by low HCO₃ (18) and compensatory respiratory alkalosis (low PaCO₂ of 30) to maintain near-normal pH. This fits the ABG results.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Rationale:
A. A potassium level of 4.9 mEq/L is within the normal reference range (typically 3.5–5.0 mEq/L), indicating that the hyperkalemia has been successfully corrected.
B. A potassium level of 5.5 mEq/L is still above normal and does not suggest full effectiveness of the treatment.
C. A potassium level of 6.2 mEq/L remains critically high and indicates that the medication was not effective.
D. A potassium level of 5.8 mEq/L is still elevated and may continue to pose cardiac risks, suggesting partial or no effectiveness.
Correct Answer is D
Explanation
Rationale:
A. Metabolic acidosis is characterized by Kussmaul respirations (deep and rapid breathing), but not typically lightheadedness or paresthesias.
B. Metabolic alkalosis often presents with hypoventilation as the body tries to retain CO₂, not hyperventilation.
C. Respiratory acidosis results from hypoventilation, leading to CO₂ retention, not the excessive breathing seen in this case.
D. Respiratory alkalosis is caused by hyperventilation, which leads to excessive loss of CO₂, resulting in symptoms such as lightheadedness, confusion, paresthesias, and blurred vision — all present in this client.
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