girl with CGM device measuring blood glucose


Continuous Glucose Monitoring (CGM) is a device created to track glucose levels throughout the day and night. CGM systems take glucose measurements at regular intervals, 24 hours a day, and translate them into dynamic data, generating glucose direction and rate of change reports.

Having access to this information can be vital for managing health conditions that affect blood sugar levels, such as ketotic hypoglycemia

So what does it do?

It allows for the continuous tracking of glucose levels, providing both the patient and healthcare providers with vital data that can help prevent hypoglycemic episodes. By being alerted to dropping blood sugar levels in real-time, individuals or caregivers can take appropriate actions, such as consuming carbohydrates, to prevent a hypoglycemic episode. Furthermore, healthcare providers can use the data to make informed decisions regarding the management and treatment of ketotic hypoglycemia, ensuring safer and more effective care.

Is a CGM all I need?

Continuous Glucose Monitors (CGMs) have revolutionized glucose monitoring by providing real-time data, but they can be very imprecise in the lower glucose range, especially when dealing with hypoglycemic episodes. Their accuracy is not reliable enough to stand alone in the diagnostic phase or daily monitoring of conditions like ketotic hypoglycemia. To ensure accurate and timely detection of low blood glucose levels, CGMs should be complemented by bedside monitoring using a traditional glucometer. This dual approach enhances the safety and effectiveness of managing ketotic hypoglycemia, as it provides a more comprehensive and reliable picture of glucose levels, especially during critical moments when precise measurements are essential.

CGM lag-time issues in the fast-dropping hypoglycemic patient

“Lag-time” is a significant concern with Continuous Glucose Monitors (CGMs), especially for patients whose blood glucose levels have a tendency to drop rapidly, as is often the case in conditions like ketotic hypoglycemia. Lag-time refers to the delay between an actual change in blood glucose levels and the corresponding reading on the CGM display. This delay can be problematic because it may not accurately capture the rapid fluctuations in glucose levels that can occur during hypoglycemic episodes.

For patients with fast-dropping blood glucose, this lag can lead to a false sense of security, as CGMs may not provide timely alerts or readings that reflect the actual, dangerous drop in glucose levels. This is why bedside monitoring with a traditional glucometer becomes crucial in such cases, as it offers real-time, immediate feedback and helps ensure that rapid changes in blood glucose are detected and addressed promptly. The combination of CGMs and glucometers provides a more comprehensive approach to managing the condition, accounting for both the benefits of continuous monitoring and the need for precise, immediate measurements during critical moments.

How do I explain CGM to my child?

It can be a challenge to make sure the complexities of this device is properly communicated to a young child. So, we’ve done a bit of a summarization for you here.

Here’s a way you can explain what a CGM is to your child.

“Imagine the CGM (Continuous Glucose Monitor) as a friendly sticker we put on your skin, like a cool temporary tattoo. It has a tiny sensor under your skin, like a secret agent.

This superhero sticker watches your blood sugar level all day and night, just like a guardian.

If it sees that your blood sugar is not in the right range, it tells us, and we can give you a yummy snack or medicine to help your body feel fantastic!

It’s like a little helper for your health.” 😊