Continuous Glucose Monitoring (CGM)

What is Continuous Glucose Monitoring?

Continuous Glucose Monitoring (CGM) is a wearable technology that continuously measures glucose levels and transmits the data to cell phone apps. Popular CGM devices include the Dexcom G6 and the FreeStyle Libre.

How Does Continuous Glucose Monitoring Work?

CGM devices are worn on the body and provide real-time glucose readings as a complement to traditional lab tests. They continuously monitor glucose levels day and night, allowing for better blood sugar management.

Why is Continuous Glucose Monitoring Performed?

CGM helps individuals track their glucose levels, providing valuable insights into how different foods, activities, and medications affect their blood sugar. It is beneficial for:

  • People with diabetes, to maintain optimal glucose levels.
  • People without diabetes, to understand how various factors impact their glucose.
  • People with hypoglycemia, to prevent dangerously low blood sugar levels.

What Can You Expect During Continuous Glucose Monitoring?

There are various types of CGM devices, including:

  • Under-Skin Sensors: Inserted just beneath the skin.
  • Upper Arm Patches: Worn on the skin surface.
  • Implants: Placed under the skin for longer-term monitoring.

Follow-Up and Recovery for Continuous Glucose Monitoring

After setting up a CGM device, patients can resume normal activities immediately. The device will regularly transmit glucose data to a connected app, which healthcare providers can access and review during potentially between follow-up appointments to adjust treatment plans as necessary.

Potential Risks of Continuous Glucose Monitoring

While CGM is generally safe, potential risks include:

  • Skin Irritation: At the site of the sensor or patch.
  • Inaccurate Readings: Due to improper sensor placement or device malfunction.
  • Infection: Very rarely, at the insertion site for under-skin sensors or implants.
  • Discuss any concerns with your healthcare provider to ensure CGM is the right choice for your glucose monitoring needs.


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