or high glucose event.
Precautions
Be Accurate, Be Quick
Enter the exact BG value displayed on your BG meter within five minutes of a
fingerstick.
Entering the wrong BG values, or waiting more than five minutes before entry, might
affect sensor performance, resulting in you missing a severe low or high glucose event.
Significant Glucose Rate Changes
Don’t calibrate when your BG is changing at a significant rate: more than 2 mg/dL per
minute.
Look for rate of change arrows on your display device screen and don’t calibrate when
you see:
• A single arrow, pointing up
- Rising 2-3 mg/dL each minute
• Two arrows pointing up
- Rising more than 3 mg/dL each minute
• Single arrow pointing down
- Falling 2-3 mg/dL each minute
• Two arrows pointing down
- Falling more than 3 mg/dL each minute
Calibrating during a significant rise/fall of your BG may affect accuracy of sensor
glucose readings, resulting in you missing a severe low or high glucose event.
Fingerstick Only
Only use fingerstick measurements from your BG meter for calibration.
Alternative site BG values from your arms, palm of your hand, etc., may be different
and less accurate than your fingerstick BG values. Using alternative site BG values for
calibration might affect sensor performance, resulting in you missing a severe low or
high glucose event.
Prior to Initial Calibration: Data/Alarm/Alert
After starting a new sensor session, until completing your initial calibrations, you won’t
receive any sensor information such as readings, Alarm or Alerts. Without these, you
may miss a severe low or high glucose event.
Continue to take fingerstick measurements during a new sensor warmup period.
Dexcom G5 Mobile CGM System Quick Start Guide • 7
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