Finger prick blood glucose readings and sensor glucose reading won't always match and in fact are likely to be different.
That's because sensor glucose readings come from the interstitial fluid (ISF), a thin layer of fluid that surrounds the cells of the tissues below your skin, not from your blood.
There is a 5 to 10-minute delay in ISF glucose response to changes in blood glucose.1 Glucose readings on ISF have been proven to reliably reflect glucose levels.2
Here's a video tutorial from Abbott to help show how blood glucose readings are different from sensor readings
This article was sourced from: https://www.freestylelibre.com.au/difference-between-glucose-interstitial-glucose