A patient with lung cancer develops syndrome of inappropriate antidiuretic hormone secretion (SIADH). After reporting symptoms of weight gain, weakness, and nausea and vomiting to the physician, you would anticipate which initial order for the treatment of this patient?
Correct Answer: B
Rationale: SIADH, common in lung cancer, overproduces ADH, retaining water and diluting sodium hyponatremia causes weight gain, weakness, nausea. Fluid restriction, the initial fix, curbs water intake, raising sodium levels naturally, tackling the root imbalance. A fluid bolus worsens dilution, risking seizures. Urinalysis checks concentration, not a treatment. Sodium restriction deepens hyponatremia, counterproductive. Anticipating fluid limits aligns with SIADH's pathophysiology nurses expect this order to stabilize the patient, monitoring for symptom relief or escalation, a frontline step in managing this paraneoplastic crisis.