The Corrected Sodium Calculator is a mandatory calculation for managing diabetic emergencies such as Diabetic Ketoacidosis (DKA) and Hyperosmolar Hyperglycemic State (HHS).
The Illusion of Hyponatremia
When a patient presents with a blood glucose of 800 mg/dL, their lab panel will almost always show a critically low sodium level, perhaps 125 mEq/L. However, they have not actually lost any sodium. The immense concentration of sugar in their blood has acted like a sponge, sucking water out of their intracellular space and diluting the blood plasma.
Corrected Na = Measured Na + [1.6 × ((Glucose - 100) / 100)]
By calculating the "Corrected" Sodium, the physician determines what the sodium level would be if the blood sugar were normal. This corrected value dictates which type of IV fluid (Normal Saline vs Half-Normal Saline) the patient must receive as their blood sugar is brought down with insulin.