Description

The corrected serum sodium level should be calculated in nonketotic hyperosmolar coma. Apparent mild hyponatremia occurring with very high glucose levels may actually represent hypernatremia.


corrected sodium level in mEq/L = corrected sodium level in mmol/L =

= (measured sodium in mEq/L) + ((variable) * (glucose in mg/dL) /100)

 

where:

• variable = a value from 1.3 to 1.6, most often 1.6. This corresponds to the 1.6 mmol/L change in serum sodium for every 100 mg/dL of glucose.

• sodium in mmol/L = mEq/L

 

Another equation (Wall) is used when the serum glucose is > 200 mg/dL

 

corrected sodium level in mmol/L =

= (measured sodium in mmol/L) + (0.016 * ((measured glucose in mg/dL) – 100))

 

where:

• 0.016 is equivalent to the previous equation's (variable) / 100.


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