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What are the differences between interstitial fluid (ISF) and blood glucose (BG) readings?

Interstitial fluid glucose measurements are taken from the fluid within tissue while blood glucose measurements are taken directly from the blood. Sensor glucose values, which are based on interstitial fluid glucose levels, can be different from blood glucose levels (fingersticks*), particularly during times when your blood glucose is changing quickly. For example, after eating, taking insulin, or exercising. When glucose levels are falling quickly, glucose readings from the sensor may be higher than blood glucose levels. On the other hand, when glucose levels are rising quickly, glucose readings from the sensor may be lower than blood glucose levels.

* Fingersticks are required for treatment decisions when you see Check Blood Glucose symbol, when symptoms do not match system readings, when you suspect readings may be inaccurate, or when you experience symptoms that may be due to high or low blood glucose.

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ADC-2661293 v5.0 06/26

♢ Eligible patients will receive one (1) FreeStyle Libre 3 Plus sensor for users with a compatible mobile phone operating system at $0 copay. The expiration date of the voucher is 60 days from the issue date. This program is available for patients with Type 1 diabetes or Type 2 diabetes or gestational diabetes. Patients ages 18 and older are eligible to sign up and receive an offer for the (1) FreeStyle Libre 3 Plus sensor. Patients ages 2–17 are eligible to receive an offer for the (1) FreeStyle Libre 3 Plus sensor through their parent or guardian. This offer is void where prohibited by law. Abbott may modify or rescind this offer at any time without notice. The discounts are not available to beneficiaries of Kaiser Permanente, Medicare, Medicaid, TRICARE, Veteran Affairs or other state healthcare programs, residents of Massachusetts, or US territories (other than Puerto Rico). The free (1) FreeStyle Libre 3 Plus sensor is provided as a sample and is limited to one sample per eligible person per product identification number. The FreeStyle Libre 3 Plus sensor cannot be re-sold, traded nor submitted to any third-party payer for reimbursement and is not provided as any inducement for future purchases. The free sample card is not health insurance. 

Important Safety Information

Product for prescription only, for Important Safety Information please visit FreeStyleLibre.us

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ADC-2660560 v41.0

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