About this procedure
Continuous glucose monitoring, or CGM, uses a small sensor to measure glucose in interstitial fluid and send readings to a compatible device. Unlike a single finger-stick measurement, it shows day-and-night trends, the direction glucose is changing and, depending on the model, alerts for low or high levels.
Who may benefit
CGM is used in diabetes management for individual clinical reasons, including tracking variability or reducing hypoglycemia risk. The clinician considers compatibility with treatment, sensor skills, availability of supplies and the ability to interpret reports. Device features, wear duration and insertion procedures vary by model.
Sensor use and education
Before starting, discuss the device, the manufacturer-approved insertion site, the app or reader and glucose reports. Understanding trends and alerts is as important as the current number. A backup blood glucose meter is still needed: symptoms that do not match sensor readings or a device failure may require finger-stick testing.
Related topics: Type 1 diabetes; Insulin pump setup.
Signs and symptoms
- A need to review glucose patterns throughout the day and night.
- Hypoglycemia episodes or a risk of low glucose.
- Insulin treatment or a complex diabetes management plan.
- A need to review glucose reports with a clinician.
Diagnosis and tests
Whether CGM is appropriate depends on diabetes type, treatment, risks and patient preferences. The clinician evaluates its usefulness and helps interpret data. This informational page does not endorse a specific device manufacturer.
Care and treatment approaches
Sensor setup includes instruction on use, checking unexpected readings, responding to alerts and replacing supplies. CGM data may inform treatment discussions, but insulin doses must not be changed independently without an agreed plan.
When to seek urgent care
Severe hypoglycemia, seizures, fainting or altered consciousness needs emergency medical care. Call 103 in Ukraine immediately. Do not delay care while waiting for the sensor reading to update.
Frequently asked questions
Are CGM readings identical to meter readings?
No. CGM measures glucose in interstitial fluid, which can lag behind blood glucose values.
Do I still need a glucose meter with CGM?
Yes. A meter is a backup for device problems or readings that do not match how you feel.
Are all CGM systems the same?
No. They differ in compatibility, alerts, operating requirements and consumable supplies.
Important information
A medical consultation is needed for diagnosis and treatment recommendations.
Self-treatment can be harmful to your health.
