Lifescan blood glucose monitoring system manual

Q. Why don’t my Meter results match the results that I got from my doctor’s laboratory exactly?

A. Many Health Care Professionals believe that the result that you get with your Meter should fall within 15% to 20% of the result obtained when whole blood is tested on laboratory equipment.5 However, there are a number of reasons why the blood glucose result from your Meter may vary even more than 20% from a laboratory result.6 One of the most common reasons is that laboratories use serum or plasma samples, while home blood glucose monitors use whole blood. Whole blood results are approximately

10%–12% lower than serum or plasma values from the same blood sample (at average hemocrit levels of 41%–45%). To adjust for this difference, divide the laboratory value by 112% or 1.12.7

Example:

■Let’s assume your lab (plasma) result is 8.3 mmol/L.

■8.3 divided by 1.12 = 7.4 mmol/L.

■Compare your Meter result to 7.4 mmol/L.

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