User`s guide

Dexcom G4 PLATINUM Professional System User’s Guide | 81
CHAPTER 7: CALIBRATING THE DEXCOM G4
PLATINUM PROFESSIONAL SYSTEM
In both real-time and blinded modes, you must calibrate Dexcom G4
PLATINUM Professional System sensor glucose readings to the blood
glucose meter.
7.1 CALIBRATION OVERVIEW
The receiver needs calibrations to display and record accurate
continuous sensor glucose readings and trend information. There are
important times when you must calibrate:
1. 2-hour startup: 2 hours after you insert the sensor
2. 12 hour update: every 12 hours after the 2-hour startup calibration
3. More information needed or other reasons
When calibrating, you must enter the blood glucose values into the
receiver by hand. You can use any commercially available blood glucose
meter. You must calibrate with accurate blood glucose meter values to
get accurate sensor glucose readings.
Ontherstdayofthesensorsession,youmustenter2bloodglucose
values into the receiver. You must enter at least 1 blood glucose value
calibration 12 hours after the startup calibration. You must enter 1 blood
glucose value every 12 hours throughout the 7-day sensor session. The
receiver will remind you when it needs these calibrations. You may be
CONTRAINDICATION
Taking medications with acetaminophen (such as
Tylenol) while wearing the sensor may falsely raise
your sensor glucose readings. The level of inaccuracy
depends on the amount of acetaminophen active in your
body and may be different for each person.