Question

A 72-year-old woman with chronic hyponatraemia due to SIADH has a serum sodium of 118 mmol/L that has been present for at least 1 week. She is mildly unsteady but has no seizures or coma. What is the safest target rate of correction over the first 24 hours?

Accepted Answer

Increase serum sodium by no more than 4-6 mmol/L in 24 hours

Answer

Increase serum sodium by 10-12 mmol/L in 24 hours

Answer

Increase serum sodium by 16-18 mmol/L in 24 hours

Answer

Normalise serum sodium to 135 mmol/L within 24 hours

Answer

There is no limit on correction rate in chronic hyponatraemia

Practice question

A 72-year-old woman with chronic hyponatraemia due to SIADH has a serum sodium of 118 mmol/L that has been present for at least 1 week. She is mildly unsteady but has no seizures or coma. What is the safest target rate of correction over the first 24 hours?