Abbott FreeStyle Libre Interactive Tutorial page 5

Select an appropriate Sensor site to help the Sensor stay attached to the body and prevent discomfort or skin irritation. Avoid
areas with scars, moles, stretch marks, or lumps. Select an area of skin that generally stays flat during normal daily activities (no
bending or folding). Choose a site that is at least 1 inch away from an insulin injection site.
When is Sensor Glucose different from Blood Glucose:
Physiological differences between the interstitial fluid and capillary blood may result in differences in glucose readings between
the System and results from a fingerstick test using a blood glucose meter. Differences in glucose readings between interstitial
fluid and capillary blood may be observed during times of rapid change in blood glucose, such as after eating, dosing insulin, or
exercising.
What to know about interfering substances such as Vitamin C and Aspirin:
Taking ascorbic acid (vitamin C) while wearing the Sensor may falsely raise Sensor glucose readings. Taking salicylic acid (used
in some pain relievers such as aspirin and some skin care products) may slightly lower Sensor glucose readings. The level of
inaccuracy depends on the amount of the interfering substance active in the body.
Test results did not indicate interference for methyldopa (used in some drugs to treat high blood pressure) or tolbutamide
(infrequently used in some drugs to treat diabetes in the US) at maximum circulating levels. However, concentrations of potential
interferents in interstitial fluid are unknown compared to circulating blood.
What to know about X-Rays:
The Sensor should be removed prior to exposing it to an X-ray machine. The effect of X-rays on the performance of the System
has not been evaluated. The exposure may damage the Sensor and may impact proper function of the device to detect trends
and track patterns in glucose values during the wear period.
When to remove the Sensor:
If the Sensor is becoming loose or if the Sensor tip is coming out of your skin, you may get no readings or unreliable readings,
which may not match how you feel. Check to make sure your Sensor has not come loose. If it has come loose, remove it and
apply a new one.
If you believe your glucose readings are not correct or are inconsistent with how you feel, perform a blood glucose test on your
finger to confirm your glucose. If the problem continues, remove the current Sensor and apply a new one.
What to do if you are dehydrated:
Severe dehydration and excessive water loss may cause inaccurate Sensor glucose readings. If you believe you are suffering
from dehydration, consult your health care professional immediately.
What to know about the Reader's Built-in Meter: