Dexcom G7 User Manual page 100

Authorized materials: Use BG meters and strips authorized for sale in your
l
country. If needed, confirm with your healthcare provider.
Accurate BG meter: Use accurate BG meters such as those that meet current ISO
l
15197 standards. If needed, confirm with your healthcare provider or a published
resource. (Pleus, 2020. System accuracy evaluation of 18 CE-marked
current-generation blood glucose monitoring systems based on EN ISO
15197:2015. BMJ Open Diabetes Res Care. 8(1). Available at
https://drc.bmj.com/content/bmjdrc/8/1/e001067.full.pdf) If your BG meter
seems inaccurate or unreliable, don't use it to calibrate and check your meter
using your control solution.
Consistent BG meter: If you calibrate G7 using your BG meter, use the same
l
meter throughout the sensor session.
Product instructions: Follow BG meter instructions exactly.
l
There may be times when the numbers temporarily don't match, but are likely to
become closer over time. For example:
Sensor's first day: With newly inserted sensors, the differences between your BG
l
meter value and the sensor reading may be greater. Generally, the numbers get
closer over the first 24 hours.
Pressure on sensor: Sometimes when something is pressing on your sensor, for
l
example, if you're lying on it, it can affect your sensor readings. Relieve the
pressure and the numbers should get closer.
To determine what to do, watch your sensor readings over several hours. If the sensor
readings are always higher (or always lower) than your BG meter values, and always
outside the range described above, consider using a different BG meter or calibrating
G7 using your BG meter. Also consider calibrating your G7 using your BG meter if your
G7 and BG meter numbers don't match, and your expectations or symptoms fit the BG
meter value, not the sensor reading.
Calibration
Calibrating your G7 using your BG meter is optional. Use it to move your sensor
reading closer to your BG meter value.
92