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Blood Glucose Meters measure glucose levels in your blood at any single point in time, and require a deliberate action to get a reading.

CGMs measure the body’s glucose levels in real-time by sensing the glucose present in tissue fluid (a.k.a the interstitial fluid) through a sensor placed on your skin, and transmit those readings to a small recording device called the receiver. The CGM device has 3 components:
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The sensor consists of a tiny probe that is inserted under the skin of the upper arm using a simple applicator. Once placed, the device continuously records your glucose levels throughout the duration of 14 days.

The transmitter sits on top of the sensor and is attached to an electrode that sends glucose information to a separate receiver or a smartphone app.

The receiver displays real-time glucose levels, blood glucose trends, and your overall glucose history.

The blood glucose reading from the CGM device is then converted into a standardised report called an Ambulatory Glucose Profile (AGP) report. It gives a detailed picture of your 14-day readings and includes a summary of your glucose profile, daily glucose graphs and the times you measured above and below your target range.

Developed by the International Diabetes Center, an Ambulatory Glucose Profile (AGP) report, is a standardised way of reporting Continuous Glucose Monitor (CGM) data. It provides a simplified way to look at your blood glucose patterns and trends based on at least 7 to 14 days of CGM data.

CGM plays a vital role when it comes to predicting your current level of metabolic fitness, and thus helps in positively influencing your future metabolic health.

It allows you to keep a real-time check on how your body is functioning by offering you instant metabolic data to make the necessary changes to your lifestyle and reduce the likelihood of a surprise diagnosis later in life.

CGMs are particularly useful after meals and overnight, as they record when glucose levels drop or rise below a preset threshold.

CGMs provide a good way to monitor time spent "in range" (time spent within a normal, pre-specified blood sugar range) for people that have trouble reaching and maintaining target blood sugar.
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CGMs are particularly useful if you often have lows and are unaware of when they happen (hypoglycemia unawareness).

Yes, continuous glucose monitoring is accurate. The tiny sensor within the arm measures your readings every 1 min and store your glucose readings every 15 mins, 24/7 till the device is worn. You can see precise trends of your blood glucose variations on your App.

The sensor device inserted into the body that takes the readings can be worn for 7–14 days. The graph can be downloaded on your phones and laptops, and your endocrinologist can use it to titrate the insulin doses accordingly.