Dexcom G5 - Page 99

Dexcom G5 Mobile System User Guide
97Calibration
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
– 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
Why: Calibrating during significant rise/fall of BG may affect accuracy of sensor glucose
readings.
Consequences: Missing a severe low or high glucose event or making a treatment
decision that results in injury.
PRECAUTION
Do: Enter the exact BG value displayed on your BG meter within five minutes of a carefully
performed fingerstick measurement.
Why: Entering the wrong BG values, or waiting more than five minutes before entry, might
affect sensor accuracy.
Consequences: Missing a severe low or high glucose event or making a treatment
decision that results in injury.