Answer: D - A client with severe vomiting would typically develop metabolic alkalosis due to excess reduction of stomach acids. Metabolic alkalosis is manifested by a pH above 7.45 and a PaCO2 below 35 mm Hg. Hypokalemia, or a serum potassium level below 3.5 mEq/L, is also a common finding. The items in option C suggest metabolic acidosis. The other options are not correct.

pH = 7.47, PaCO2 = 30 mEq/L, HCO3- = 28 mEq/L

NCLEX-PN

Category - Reduction of Risk

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A nurse is caring for a client who is admitted due to severe vomiting. Which of the following laboratory findings might the nurse anticipate?

K = 3.5 mEq/L
Na = 165 mEq/L
pH = 7.32, PaCO₂ = 38 mEq/L, HCO₃- = 20 mEq/L
pH = 7.47, PaCO₂ = 30 mEq/L, HCO₃- = 28 mEq/L

Explanation

Answer: D - A client with severe vomiting would typically develop metabolic alkalosis due to excess reduction of stomach acids. Metabolic alkalosis is manifested by a pH above 7.45 and a PaCO₂ below 35 mm Hg. Hypokalemia, or a serum potassium level below 3.5 mEq/L, is also a common finding. The items in option C suggest metabolic acidosis. The other options are not correct.

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