Enter the measured sodium level and the patient’s blood glucose level into the calculator to determine the corrected sodium level.

Corrected Sodium Formula

The following formula is used to calculate the corrected sodium level:

Corrected Sodium = MS + (0.024 * (G - 100))

Variables:

  • Corrected Sodium is the calculated corrected sodium level
  • MS is the actual measured sodium level
  • G is the patient’s blood glucose level

To calculate the corrected sodium level, add the measured sodium level to 0.024 multiplied by the difference between the patient’s blood glucose level and 100.

What is a Corrected Sodium?

Corrected Sodium, also known as adjusted sodium, is a calculated value used in medical practice to accurately determine the level of sodium in the blood when there is an abnormal concentration of glucose. High levels of glucose in the blood can cause a phenomenon known as pseudo hyponatremia, where the sodium levels appear to be lower than they actually are. This is because glucose molecules occupy a significant volume in the blood and displace the sodium ions, leading to a dilutional effect. The corrected sodium calculation takes into account the concentration of glucose in the blood to provide a more accurate measure of the sodium level. This is particularly important in conditions such as diabetes, where blood glucose levels can be significantly elevated.

How to Calculate Corrected Sodium?

The following steps outline how to calculate the Corrected Sodium:

  1. First, determine the measured sodium level (mSodium) in mmol/L.
  2. Next, determine the patient’s glucose level (glucose) in mg/dL.
  3. Next, calculate the correction factor (CF) using the formula: CF = 0.016 x (glucose – 100).
  4. Next, calculate the corrected sodium (cSodium) using the formula: cSodium = mSodium + CF.
  5. Finally, calculate the corrected sodium level.
  6. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem:

Use the following variables as an example problem to test your knowledge.

measured sodium level (mSodium) = 140 mmol/L

patient’s glucose level (glucose) = 120 mg/dL