A continuous glucose monitor (CGM) is a device that helps you track your blood sugar levels in real time. Its a small sensor that you wear under your skin, usually on your upper arm. The sensor is connected to a transmitter that sends data to a display device, like a smartwatch or a smartphone.
A CGM system can give you a more complete picture of your blood sugar trends over time than fingerstick tests alone. Thats because it measures your blood sugar levels continuously throughout the day and night. It can also alert you to high or low blood sugar levels, so you can take action to prevent serious complications.
A CGM system consists of three parts:
- A sensor that you wear under your skin
- A transmitter that sends data to a display device
- A display device that shows your blood sugar readings
The sensor is a small, round device thats about the size of a quarter. It has a thin, flexible wire thats inserted just under the skin on your upper arm. The sensor stays in place for about two weeks, and then its replaced with a new one.
The transmitter is a small device that attaches to the sensor. It sends data to the display device wirelessly. The transmitter can be worn on your belt or in your pocket.
The display device is a wearable device, like a smartwatch, or a smartphone. It shows your blood sugar readings in real time. It also stores data so you can review your blood sugar trends over time.
A CGM system can help you track your blood sugar levels and identify patterns. For example, you might see that your blood sugar levels are higher in the morning than they are at night. Or you might see that your blood sugar levels are higher on days when you exercise. This information can help you make lifestyle changes to better manage your diabetes.
A CGM system can also help you avoid serious complications of diabetes, like hypoglycemia (low blood sugar) and ketoacidosis (high blood sugar).
A CGM system is a valuable tool for people with diabetes. If youre considering a CGM system, talk to your doctor to see if its right for you.