Clinical tool
Corrected Sodium
Sodium corrected for hyperglycaemia.
Enter sodium and glucose to see the corrected sodium.
What this calculates
Serum sodium adjusted for the dilutional effect of high glucose, using the Katz (1.6) and Hillier (2.4) correction factors per 100 mg/dL (5.6 mmol/L) of glucose above 100 mg/dL.
When to use it
When sodium is measured alongside marked hyperglycaemia, for example in DKA or a hyperosmolar state.
How to interpret it
The corrected value estimates what sodium would be at a normal glucose. Reference range 135 to 145 mmol/L. The two factors can differ by a few mmol/L, so both are shown.
Important limitations
- The correction factors are empirical approximations and differ between studies.
- Sodium will move as glucose and fluids are corrected, so repeat measurement is needed.
- Other causes of an abnormal sodium, such as extreme triglycerides or paraproteins, are not corrected for here.
For practising medics only. Clinical tools support judgement, they do not replace it. Always verify results against current guidelines and the patient in front of you.