Accuracy And Calibration - Dexcom G7 User Manual

Accuracy and calibration

Issue
Your BG meter gives you one number, if you test twice (using the same or a different
BG meter) it gives you another number, and your G7 gives you a third. What do you do
with all those numbers?
Solution
The lab blood test
The test your doctor does is considered a more accurate glucose number than any
products you use at home. Both BG meters and G7 are compared to that doctor's test
to measure accuracy in clinical studies. They aren't compared to each other. Because
of this, the sensor reading and BG meter value are unlikely to be exactly the same
number.
Good fingerstick practices
When using your BG meter, check for these things:
Good test strips: Your test strips are stored as directed and not expired.
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Cleanliness: Your hands are clean for the fingerstick. Wash your hands
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thoroughly with soap and water (not hand sanitizer) and dry them. Then test.
Many inaccurate BG meter values are from people not washing their hands
thoroughly before testing.
Authorized materials: Use BG meters and strips authorized for sale in your
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country. If needed, confirm with your healthcare provider.
Accurate BG meter: Use accurate BG meters such as those that meet current ISO
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15197 standards. If needed, confirm with your healthcare provider. If your BG
meter seems inaccurate or unreliable, don't use it to calibrate and check your
meter using your control solution.
Consistent BG meter: If you calibrate G7 using your BG meter, use the same
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meter throughout the sensor session.
Product instructions: Follow BG meter instructions exactly.
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