THE DIFFERENCE BETWEEN SENSOR
GLUCOSE AND BLOOD GLUCOSE

Finger prick blood glucose readings and sensor
glucose readings won’t always match and in fact
are likely to be different1

That’s because sensor glucose readings come from the interstitial fluid (ISF), a thin layer of fluid that surrounds the cells of tissues below the skin, not from blood.

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WHY ARE FREESTYLE
LIBRE SENSOR READINGS
SOMETIMES DIFFERENT
FROM A FINGER PRICK
BLOOD GLUCOSE TEST?

Blood glucose and sensor glucose are closely related but not identical.

A sensor glucose reading always lags behind a finger prick blood glucose reading by about 2.4 img 4.6 minutes.2,3

If glucose levels are rising or falling, then the two readings may be different. This is completely normal and to be expected, particularly after meals, after taking insulin or when you´ve been exercising.

When your glucose levels are stable then the two readings may be very similar.

Although the readings may differ slightly, the FreeStyle Libre system is accurate3 and safe to dose insulin from your scanned glucose result.1

The FreeStyle Libre flash glucose monitoring system is desgined to replace self monitoring blood glucose testing1

No finger pricks… means no finger pricks!1

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FREE from finger pricks to dose insulin

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FREE from finger pricks to confirm low glucose or going low

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FREE from finger pricks when glucose is rapidly changing

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FREE from finger pricks to take acetaminophen

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FREE from finger pricks for calibration

Know the difference between testing interstitial fluid vs blood glucose by watching this video.

1. Finger pricks are required if glucose readings do not match symptoms or expectations

2. FreeStyle Libre System Performance Data Sheet.

3. Alva S. JDST (2020). https://doi.org/10.1177/1932296820958754

– Images are for illustrative purposes only. Not real patient or Health Care Professional.

– Simulated data for illustrative purposes only. Not real patient or data.