Medical Surgical Nursing NCLEX RN Questions Related

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A client receiving chemotherapy for metastatic colorectal cancer has had 2 days of vomiting. Assessment findings include: irregular pulse of 120, blood pressure 88/48, respiratory rate of 14, serum potassium of 2.9 mEq/L, and arterial blood gas€”pH 7.46, PCO‚‚ 45, PO‚‚ 95, bicarbonate level 29 mEq/L. Which of the following interventions is appropriate for the nurse to administer to the client?

  • A. Oxygen at 4 L per nasal cannula.
  • B. Potassium 40 mEq PO now.
  • C. 5% Dextrose in 0.45% Normal Saline with KCl 40 mEq/L at 125 mL/hour.
  • D. NaHCO‚ƒ 75 mEq IV.
Correct Answer: C

Rationale: Hypokalemia (2.9 mEq/L) and hypotension (88/48) due to vomiting require I.V. fluid and potassium replacement (D5 0.45% NS with KCl) to correct electrolyte imbalance and dehydration. The alkalosis (pH 7.46) does not require bicarbonate, and oral potassium is unsafe with vomiting.