User's Manual

Dexcom G5 Mobile System User Guide
Calibration
103
Warning
Do:
Calibrate at least once every 12 hours.
Why:
Calibrating less often than every 12 hours might cause inaccurate
sensor glucose readings.
Consequences:
Missing severe low (hypoglycemia) or high
(hyperglycemia) Alarm or Alerts.
Precaution
Do:
Look at trend arrows before calibrating. Trend arrows help you
determine if you can calibrate now or should wait.
Don’t:
Never calibrate if your BG is changing at a significant rate, typically
more than 2 mg/dL per minute.
Never calibrate when you see :
•
A single arrow, pointing up
o
Rising 2-3 mg/dL each minute
•
Two arrows pointing up
o
Rising more than 3 mg/dL each minute
•
Single arrow pointing down
o
Falling 2-3 mg/dL each minute
•
Two arrows pointing down
o
Falling more than 3 mg/dL each minute
Why:
Calibrating during significant rise/fall of BG may affect accuracy of
sensor glucose readings.
Consequences: You may miss a severe low or high glucose event.