You can choose among a handful of CGM
devices available today. Each works pretty much the same way. The main
differences are in a device’s look, feel and features.
In general, here’s how CGM works:
1.
You place a small sensor just under
your skin, usually on your belly or arm. An applicator makes this part quick
and easy to do. Adhesive tape holds the sensor in place.
2.
The sensor measures glucose levels in
the fluid under your skin. Most CGM devices take readings every five minutes,
all day and night. You’ll need to change the sensor regularly based on the
device. For most devices, you change sensors at home every 7 to 14 days. For
some long-term implantable CGM devices, your healthcare provider will change
the sensor in a procedure in their office a handful of times (or less) each
year.
3.
All CGM systems use a transmitter to
wirelessly send the glucose data from the sensor to a device where you can view
it. For some CGM systems, the transmitter is reusable and attaches to each new
sensor. For other CGM systems, the transmitter is part of the disposable
sensor.
4.
Depending on the CGM system, glucose
data from the sensor is sent to either a handheld device called a receiver
(similar to a cell phone), an app on your smartphone or an insulin pump.
5.
You can download CGM data (real-time
glucose levels, trends and history) to a computer anytime. Some CGM systems
will send data continuously. You can also share the information with your
provider.