What is the difference between a Dexcom CGM sensor glucose reading and blood glucose value (BGV)?
Dexcom CGM systems measure the glucose levels in the interstitial fluids just beneath your skin. Blood glucose meters measure glucose levels in your capillary blood.
Different body fluids give different numbers due to physiological reasons, so readings between the two will rarely be exactly the same. However, if your sensor readings do not match your symptoms:
- Wash your hands with soap and water
- Dry them
- Take a fingerstick with your meter
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