Sodium Correction in Hyperglycemia Calculator

Sodium Correction in Hyperglycemia Explanation and Clinical Context
Sodium correction in the setting of hyperglycemia is essential because elevated serum glucose increases plasma osmolality and shifts water from the intracellular compartment into the extracellular compartment. This movement dilutes serum sodium and leads to a factitious reduction in the measured value. Correcting sodium helps clinicians assess the true physiological sodium concentration and guides fluid therapy. Corrected sodium is calculated by adding zero point zero one six multiplied by the difference between serum glucose and one hundred to the measured sodium concentration. This adjustment becomes clinically important when glucose reaches values that significantly alter serum osmolality. A corrected sodium value within the standard physiological range suggests that the apparent hyponatremia is dilutional rather than due to sodium deficit. A corrected value that remains low indicates true hyponatremia that may require targeted therapy. Correct interpretation is crucial in acute care settings such as diabetic ketoacidosis or hyperosmolar hyperglycemic state where accurate evaluation of sodium status influences fluid resuscitation choice and monitoring strategy.

Reference
Hillier TA, Abbott RD, Barrett EJ. Hyponatremia and hyperglycemia. Serum sodium correction factor revisited. Clinical Endocrinology. Nineteen ninety nine.

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