Dexcom G4 Platinum User Manual page 146

13
If the difference between your sensor glucose reading and blood
glucose value is greater than 20% of the blood glucose value for sensor
glucose readings > 80 mg/dL or greater than 20 points for sensor
glucose readings < 80 mg/dL, wash your hands and take another blood
glucose measurement. If the difference between this second blood
glucose measurement and the sensor is still greater than 20% for
sensor glucose readings > 80 mg/dL or greater than 20 points for sensor
glucose readings < 80 mg/dL, recalibrate your sensor using the second
blood glucose value. The sensor glucose reading will correct over the
next 15 minutes. If you see differences between your sensor glucose
readings and blood glucose values outside of this acceptable range,
follow these troubleshooting tips before inserting another sensor:
• Make sure your sensor is not expired.
• Make sure you do not calibrate when the
• Do not use alternative blood glucose site testing (blood from your
palm or forearm, etc.) for calibration as alternative site readings may
be different than those from a blood glucose value. Use a blood
glucose value only from your fingers for calibration.
• Use only blood glucose values between 40-400 mg/dL for
calibration. If one or more of your values is outside of this range, the
receiver will not calibrate.
• Use the same meter you routinely use to measure your blood
glucose to calibrate. Do not switch your meter in the middle of
a sensor session. Blood glucose meter and strip accuracy vary
between blood glucose meter brands.
• Before taking a blood glucose measurement for calibration, wash
your hands, make sure your glucose test strips have been stored
properly and are not expired and make sure that your meter is
properly coded (if required). Carefully apply the blood sample to
the test strip following the instructions provided with your meter or
test strips.
• Make sure you are using your blood glucose meter following the
144 | Dexcom G4 PLATINUM (Pediatric) Continuous Glucose Monitoring System
or is shown.