What is the difference between a Dexcom CGM sensor glucose value 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
If your meter value matches your symptoms, use it to make treatment decisions. You may find more information on accuracy for your Dexcom system here:
MAT-0358 Rev001