26th February 2024

A 61-year-old woman is admitted to the ward because of progressively worsening confusion over the past 24 hours. She has had profuse diarrhoea following an episode of gastroenteritis.

A 61-year-old woman is admitted to the ward because of progressively worsening confusion over the past 24 hours. She has had profuse diarrhoea following an episode of gastroenteritis. Her blood test today shows a sodium level of 129mmol/L.
It is estimated that she has lost around 50mmol of Na over the last 24 hours. Her weight is 70kg.

What is her total daily sodium requirement (maintenance + replacement)?