With a monitor, the user can see their blood sugar levels every few minutes. Other devices are smartphone-compatible and work via a smartphone app. Some CGMs have a dedicated monitor, which may be a separate device or part of an insulin pump. The monitor is responsible for displaying information to the user. Most systems are able to display readings that are close to real time, although many systems have a 5-minute delay. Many systems combine the sensor and transmitter, so a person may need to sync this part with their monitor to receive readings. The transmitter communicates with the sensor and monitor and passes on the information displayed on the monitor. The sensor connects to a transmitter that allows the system to wirelessly send blood glucose readings. Users will need to regularly replace the sensor, with most working for roughly 7–14 days. Most sensors are waterproof and an adhesive patch keeps them firmly in place. This is the fluid that surrounds cells in the body and provides a similar reading to blood glucose. A thin tube, or cannula, pierces the top layer of skin and measures glucose in the interstitial fluid. SensorĪ CGM user inserts a small sensor directly under the skin, usually on the belly or arm. Also, it would only provide a single reading at the time of taking the sample.Īs such, CGMs can provide a more convenient and accessible way to monitor blood glucose.Įach CGM has three main parts: a sensor, a transmitter, and a monitor. However, this option was not practical for many people as it involved many components, and a person had to prick their finger to draw blood. Previously, one of the main options to test blood sugar was a blood sugar meter. Evidence notes that these devices can have a positive impact on glycemic control and improve HbA1C levels. Using these devices can be a useful and convenient way to help people better manage diabetes. It can provide users with dynamic information about their blood sugar and can use alerts to warn the wearer of dangerous glucose levels. To achieve this, people can use a CGM, which is a wearable device that a person places on their body to quickly and easily check their blood sugar. Continuous glucose monitoring refers to the ability to constantly measure a person’s blood glucose levels throughout the day and night.
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