A 45-year-old woman on ICU has developed severe hyponatraemia (sodium 108 mmol/L) over 5 days. She is confused but not seizing. MRI brain is normal. S...

Question

A 45-year-old woman on ICU has developed severe hyponatraemia (sodium 108 mmol/L) over 5 days. She is confused but not seizing. MRI brain is normal. She is euvolaemic. Urine osmolality is 650 mOsm/kg. Urine sodium is 60 mmol/L. TSH and cortisol are normal. The diagnosis is SIADH. What is the maximum safe rate of sodium correction in the first 24 hours?

Accepted Answer

10 mmol/L

Answer

4 mmol/L

Answer

8 mmol/L

Answer

12 mmol/L

Answer

18 mmol/L

uk-fficm MCQ (SBA): Severe Hyponatraemia