A 62-year-old man is admitted with hyponatraemia (serum sodium 115 mmol/L) due to SIADH from small-cell lung cancer. He is mildly confused but haemody...

Question

A 62-year-old man is admitted with hyponatraemia (serum sodium 115 mmol/L) due to SIADH from small-cell lung cancer. He is mildly confused but haemodynamically stable. Sodium has fallen gradually over several days. What is the most appropriate initial management strategy?

Accepted Answer

Fluid restriction and careful monitoring of serum sodium

Answer

Rapid correction of sodium to normal within 12 hours using hypertonic saline

Answer

No treatment is required because he is asymptomatic

Answer

Commence demeclocycline immediately without fluid restriction

Answer

Administer large volumes of 0.9% sodium chloride intravenously

au-amc MCQ (SBA): Hyponatraemia due to SIADH

A 62-year-old man is admitted with hyponatraemia (serum sodium 115 mmol/L) due to SIADH from small-cell lung cancer. He is mildly confused but haemodynamically stable. Sodium has fallen gradually over several days. What is the most appropriate initial management strategy?