A nurse is caring for a client diagnosis with uncompensated metabolic alkalosis secondary to prolonged vomiting. When reviewing this client's laboratory data, which value should the nurse anticipate?

decreased PaCO2

Increased PaCO2

Increased HCO3

decreased pH

Answer and Explanation

The Correct Answer is C

Rationale:
A. Decreased PaCO₂ occurs in respiratory alkalosis, not metabolic alkalosis.
B. Increased PaCO₂ may occur as compensation, but in uncompensated metabolic alkalosis, this has not yet occurred.
C. In metabolic alkalosis, especially from vomiting (loss of gastric acid), there is a primary increase in bicarbonate (HCO₃⁻).
D. Decreased pH is associated with acidosis, not alkalosis.

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Correct Answer is A

Explanation

Rationale:

A. pH 7.41: Normal range is 7.35–7.45. PaCO₂ 45 mm Hg: Normal range is 35–45 mm Hg. HCO₃⁻ 26 mEq/L: Normal range is 22–26 mEq/L. PaO₂ 84 mm Hg: Normal range is 80–100 mm Hg. SaO₂ 97%: Normal range is 95–100%. All values are within normal limits, indicating a balanced acid-base and oxygenation status.

B. pH 7.41: Normal range is 7.35–7.45. PaCO₂ 45 mm Hg: Normal range is 35–45 mm Hg. HCO₃⁻ 26 mEq/L: Normal range is 22–26 mEq/L. PaO₂ 84 mm Hg: Normal range is 80–100 mm Hg. SaO₂ 97%: Normal range is 95–100%. All values are within normal limits, indicating a balanced acid-base and oxygenation status.

C. pH 7.41: Normal range is 7.35–7.45. PaCO₂ 45 mm Hg: Normal range is 35–45 mm Hg. HCO₃⁻ 26 mEq/L: Normal range is 22–26 mEq/L. PaO₂ 84 mm Hg: Normal range is 80–100 mm Hg. SaO₂ 97%: Normal range is 95–100%. All values are within normal limits, indicating a balanced acid-base and oxygenation status.

D. pH 7.41: Normal range is 7.35–7.45. PaCO₂ 45 mm Hg: Normal range is 35–45 mm Hg. HCO₃⁻ 26 mEq/L: Normal range is 22–26 mEq/L. PaO₂ 84 mm Hg: Normal range is 80–100 mm Hg. SaO₂ 97%: Normal range is 95–100%. All values are within normal limits, indicating a balanced acid-base and oxygenation status.

A. Diarrhea B. Hypotension C. Decreased deep tendon reflexes D. Increased appetite

Correct Answer is C

Explanation

Rationale:
A. Diarrhea is more common with low calcium (hypocalcemia), while hypercalcemia often causes constipation.
B. Hypercalcemia usually causes hypertension due to increased vascular tone, not hypotension.
C. Elevated calcium levels can depress neuromuscular activity, leading to decreased deep tendon reflexes.
D. Increased appetite is not associated with hypercalcemia; hypercalcemia may cause nausea and decreased appetite.

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A nurse is caring for a client diagnosis with uncompensated metabolic alkalosis secondary to prolonged vomiting. When reviewing this client's laboratory data, which value should the nurse anticipate?

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Naxlex Comprehensive Predictor Exams

Interpret the ABG: pH 7.41, PaCO2 45mmHg. HCO3 26, PaO2 84 mmHg. SaO2 97%

Correct Answer is A

Explanation

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Correct Answer is C

Explanation

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