Corrected Sodium (Hyperglycemia) Calculator

Hyperglycemia Sodium Correction

Input Fields

Measured sodium

Na

mEq/L

Serum glucose

Glu

Glucose unit

mg/dLmmol/L

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Your Results

Corrected sodium (Katz, 1973):

Corrected sodium (Hillier, 1999):

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Corrected Sodium Formula (Katz and Hillier)

\[\text{Katz Method:} \quad \text{Na}_{\text{corrected}} = \text{Na}_{\text{measured}} + 0.016 \times (\text{Glucose} – 100)\]\[\text{Hillier Method:} \quad \text{Na}_{\text{corrected}} = \text{Na}_{\text{measured}} + 0.024 \times (\text{Glucose} – 100)\]

Explanation: These formulas adjust the serum sodium level based on elevated glucose concentrations. The correction helps clinicians avoid misinterpreting hyponatremia in hyperglycemic patients.

Hyperglycemia can cause a dilutional effect on sodium levels due to osmotic shifts. The corrected sodium calculation helps determine the true sodium concentration by factoring in the excess glucose. The Katz method is commonly used and considered more conservative, while the Hillier method may be more accurate at higher glucose levels. This calculator requires only two inputs: measured serum sodium and serum glucose.