If I Did A Finger-Prick Test, Would The Results Match My Sensor Reading - Freestyle Libre User Manual

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Table of Contents

If I did a finger-prick test, would the results

match my sensor reading?

It's important to remember that FreeStyle Libre replaces blood

glucose monitoring,

* and the two methods measure glucose

differently. Because of the lag between blood glucose and sensor

glucose, your sensor reading may not always match a finger-prick

reading at a given moment. This example illustrates why:

Sensor (ISF) glucose

Blood glucose

Glucose levels

6.5

6.9

mmol/L

When glucose

level is stable,

sensor readings

and blood

glucose readings

are similar

A finger prick test using a blood glucose meter is required during times of rapidly changing glucose levels when interstitial fluid glucose levels may not accurately reflect blood glucose levels or if hypoglycemia or impending hypoglycemia is

reported by the system or when symptoms do not match the system readings.

† The delay between sensor and blood glucose is about 5-10 minutes.

‡ Treatment decisions should not be based on real-time sensor glucose readings alone but instead should consider all the information on the results screen.

References: 1 Haak T, Hanaire H, Ajjan R, Hermanns N, Riveline JP, Rayman G. Flash glucose-sensing technology as a replacement for blood glucose monitoring for the management of insulin-treated type 2 diabetes: a multicenter,

open-label randomized controlled trial. Diabetes Ther. 2017;8(1):55-73. 2. Bailey T, Bode BW, Christiansen MP, Klaff LJ, Alva S. The performance and usability of a factory-calibrated flash glucose monitoring system. Diabetes Technol Ther.

2015;17(11):787-794.

9.0

mmol/dL

7.2

mmol/L

When glucose level is

the

trending up,

the sensor

readings may be lower than

blood glucose readings

TIPS TO REMEMBER