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A Continuous Glucose Monitor (CGM) is a medical device used to track glucose levels in real-time for individuals with diabetes. It typically consists of a small sensor placed under the skin that measures glucose levels in the interstitial fluid. The data is sent to a display device, such as a smartphone or dedicated monitor, allowing users to see their glucose trends throughout the day and night. CGMs help users manage their diabetes more effectively by providing timely information about their glucose levels.
| Measurement range | 40 to 400 mg/dL |
| Sensor lifespan | 7 to 14 days |
| Calibration | May require calibration with fingerstick tests |
| Data transmission | Bluetooth or NFC connectivity |
| Accuracy | Typically ±10% of laboratory glucose measurements |
When selecting a Continuous Glucose Monitor, consider the sensor lifespan, calibration requirements, and connectivity options. It's important to specify the desired accuracy and any specific compatibility with existing diabetes management systems. Additionally, inquire about the availability of disposable sensors and the frequency of data transmission. Quantities may vary based on individual needs and insurance coverage.
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A CGM measures glucose levels in interstitial fluid using a small sensor placed under the skin.
Some CGMs require calibration with fingerstick tests, while others are factory-calibrated.
Most sensors last between 7 to 14 days before needing replacement.
Yes, CGMs provide real-time data that can help inform insulin dosing decisions.
Yes, most CGMs require a prescription from a healthcare provider.
CGMs typically have an accuracy of ±10% compared to laboratory glucose measurements.