Continuous glucose monitoring (CGM) | Medtronic (2024)

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Continuous glucose monitoring (CGM) gives you a more complete picture of your glucose levels, which can lead to better lifestyle decisions and better glucose control.


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What is CGM?


CGM systems track glucose levels, every few minutes, 24/7 through a tiny sensor inserted under your skin, either on your abdomen or arm using an automatic inserter. The sensor measures your interstitial glucose level, which is the glucose found in the fluid between the cells. CGM therapy can be used with or without an insulin pump.*

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Predictive alerts - taking action sooner1

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What are the benefits of CGM?


A CGM system gives you a greater view of your sugar level trends. It can provide valuable information1 at crucial points during the day, including before and during exercise, prior to driving, or in the middle of the night.

The CGM can provide this data to an integrated insulin pump or smart insulin pen to help provide actionable insights.

Whether you manage your diabetes with an insulin pump, insulin injections (MDI), oral medications, or through diet and exercise, Medtronic offers CGM products and insulin pump systems that give you, your loved ones and healthcare professionals the insights to stay ahead of diabetes and help you live life on your terms.

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See how much more it can do as part of a system

CGM device systems

By connecting the CGM to a smart insulin pen or insulin pump, you allow technology to help do more of the thinking, remembering, and acting, when it comes to managing diabetes.

CGM with Smart Insulin Injection System

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For people who manage their diabetes with injections, the smart insulin injection system can help reduce the physical and mental effort required to manage diabetes.

With a smart insulin injection system, you get:

  • Insulin tracking and dose reminders
  • Dosing recommendations
  • Actionable glucose alerts

Learn more

CGM with Automated Insulin Pump System

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If you take 3 or more insulin injections per day, an insulin pump system can help prevent highs and lows with real time insulin delivery adjustments 24/7.

With an insulin pump system, you get:

  • 96% fewer injections than daily insulin injections**
  • More convenience
  • Easier mealtime dosing with Meal Detection™ Technology*

Learn more

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We never want cost to be a barrier to getting diabetes technology. We have CGM access discounts and programs to help get you started! Learn more »

Talk to a diabetes therapy consultant


To request a free insurance coverage check and learn more about your eligibility and potential out-of-pocket costs, please complete the form below or call 1-800-646-4633, and one of our Diabetes Therapy consultants will be happy to assist you.


Standalone CGMFinancial support programs

¶ Access depends upon health plan design.
1 The system is intended to complement, not replace, information obtained from standard blood glucose monitoring devices. All therapy adjustments should be based on measurements obtained from standard blood glucose monitoring devices and not on values provided by the system.
2 Grunberger G, Bailey TS, Cohen AJ, et al; and AACE Insulin Pump Management Task Force. Statement by the American Association of Clinical Endocrinologists Consensus Panel on insulin pump management. Endocr Pract. 2010;16(4):746-762.
∆ Smart devices sold separately. For a list of compatible devices, refer to user guide.

*Taking a bolus 15 – 20 minutes before a meal helps to keep blood sugar levels under control after eating.

** Assumes 4 injections per day for 30 days and one infusion set change every seven days.

Important Safety Information: Guardian Connect CGM System
The Guardian Connect system requires a prescription and is indicated for continuous or periodic monitoring of glucose levels in the interstitial fluid under the skin, in patients (14 to 75 years of age) with diabetes mellitus. The system is intended to complement, not replace, information obtained from standard blood glucose monitoring devices, and is not recommended for people who are unwilling or unable to perform a minimum of two meter blood glucose tests per day, or for people who are unable or unwilling to maintain contact with their healthcare professional. The system requires a functioning mobile electronic device with correct settings. If the mobile device is not set up or used correctly, you may not receive sensor glucose information or alerts. For complete details of the system and its components, including warnings, contraindications, and precautions, please consult the user guide at http://www.medtronicdiabetes.com/support/download-library/user-guides and http://www.medtronicdiabetes.com/important-safety-information.

Important Safety Information: MiniMed 780G System With SmartGuard Technology With Guardian 4 Sensor
The MiniMed 780G system is intended for continuous delivery of basal insulin at selectable rates, and the administration of insulin boluses at selectable amounts for the management of type 1 diabetes mellitus in persons seven years of age and older requiring insulin as well as for the continuous monitoring and trending of glucose levels in the fluid under the skin. The MiniMed 780G system includes SmartGuard technology, which can be programmed to automatically adjust insulin delivery based on the continuous glucose monitoring (CGM) sensor glucose values and can suspend delivery of insulin when the sensor glucose (SG) value falls below or is predicted to fall below predefined threshold values.

The Medtronic MiniMed 780G system consists of the following devices: MiniMed 780G insulin pump, the Guardian 4 transmitter, the Guardian 4 sensor, One-press serter, the Accu-Chek Guide Link blood glucose meter, and the Accu-Chek Guide test strips. The system requires a prescription from a healthcare professional.

The Guardian 4 sensor is intended for use with the MiniMed 780G system and the Guardian 4 transmitter to monitor glucose levels for the management of diabetes. The sensor is intended for single use and requires a prescription. The Guardian 4 sensor is indicated for up to seven days of continuous use.

The Guardian 4 sensor is not intended to be used directly to make therapy adjustments while the MiniMed 780G is operating in manual mode. All therapy adjustments in manual mode should be based on measurements obtained using a blood glucose meter and not on values provided by the Guardian 4 sensor. The Guardian 4 sensor has been studied and is approved for use in patients ages 7 years and older and in the arm insertion site only. Do not use the Guardian 4 sensor in the abdomen or other body sites including the buttocks, due to unknown or different performance that could result in hypoglycemia or hyperglycemia.

WARNING: Do not use the SmartGuard feature for people who require less than 8 units or more than 250 units of total daily insulin per day. A total daily dose of at least 8 units, but no more than 250 units, is required to operate in the SmartGuard feature.

WARNING: Do not use the MiniMed 780G system until appropriate training has been received from a healthcare professional. Training is essential to ensure the safe use of the MiniMed 780G system.

WARNING: Do not use SG values to make treatment decisions, including delivering a bolus, while the pump is in Manual Mode. When the SmartGuard feature is active and you are no longer in Manual Mode, the pump uses an SG value, when available, to calculate a bolus amount. However, if your symptoms do not match the SG value, use a BG meter to confirm the SG value. Failure to confirm glucose levels when your symptoms do not match the SG value can result in the infusion of too much or too little insulin, which may cause hypoglycemia or hyperglycemia.

Pump therapy is not recommended for people whose vision or hearing does not allow for the recognition of pump signals, alerts, or alarms. The safety of the MiniMed 780G system has not been studied in pregnant women, persons with type 2 diabetes, or in persons using other anti-hyperglycemic therapies that do not include insulin. For complete details of the system, including product and important safety information such as indications, contraindications, warnings and precautions associated with system and its components, please consult https://www.medtronicdiabetes.com/important-safety-information#minimed-780g and the appropriate user guide at https://www.medtronicdiabetes.com/download-library

Continuous glucose monitoring (CGM) | Medtronic (2024)

FAQs

How many glucose readings can a CGM provide? ›

Continuous glucose monitoring (CGM) systems are able to transmit glucose readings every 1–15 minutes to a receiver, insulin pump, phone(s), or watch, and eventually the glucose data may be uploaded to a computer, electronic medical record (EMR) system, and/or the Cloud.

What is a healthy CGM level? ›

Time in range is the amount of time you spend in the target blood glucose (blood sugar) range—between 70 and 180 mg/dL for most people.

Why is my CGM reading so low? ›

Nighttime dips. Your body's energy requirements decrease during sleep, especially in REM phases, leading to natural glucose dips. Interestingly, sleeping on the sensor might cause false low readings due to pressure-induced errors.

How do you interpret continuous glucose monitor results? ›

CGM key metrics
  1. Time in Range: glucose levels between 70-180 mg/dl.
  2. Time Below Range: glucose levels below 70 mg/dl.
  3. Time in severe hypoglycemia: glucose levels below 54 mg/dl.
  4. Time Above Range: glucose levels above 180 mg/dl.
  5. Time in severe hyperglycemia: glucose levels above 250 mg/dl.
Apr 26, 2021

What are the limitations of CGM? ›

Potential DISADVANTAGES:
  • Cost, especially if not covered by insurance.
  • Insurance coverage or qualifications for coverage may be an issue.
  • May require calibration with fingerstick glucose.
  • Need to remember to scan an intermittently-scanned device.
  • Can be complicated to learn, up front learning curve.
  • Information overload.

How off can a CGM be? ›

Accuracy studies of most CGM units show that glucose readings are typically within ~10% of the true value. For example, if your blood glucose is actually 100 mg/dL, then a CGM might display a value around 90 mg/dL or 120 mg/dL for your interstitial glucose (3).

Why is my CGM reading lower than my finger stick? ›

Finger prick blood glucose readings and sensor glucose readings won't always match and in fact are likely to be different. That's because sensor glucose readings come from the interstitial fluid (ISF), a thin layer of fluid that surrounds the cells of the tissues below your skin, not from your blood.

Why is my CGM so off? ›

Glucose spikes can impact CGM accuracy, so avoiding eating at least 2-3 hours before applying a CGM is best. You'll also want to avoid food and intense exercise during the warm-up period. Each device will have a different warmup period but generally takes a few hours.

What is the margin of error for CGM? ›

The gold standard for accuracy is a blood draw measurement and both finger sticks and CGMs have error margins (MARD) to that standard. Finger sticks tend to be in the range of 5-10% MARD, while the Libre has a MARD of about 9.7% over 14 days, and the Dexcom G6 has a MARD of 9% over 10 days.

How accurate is CGM reading? ›

According to the FDA, glucose meter readings are 95% accurate within 15% for all readings within the “usable” blood glucose range and 99% accurate within 20% for all readings within that usable range. The word “usable” means the range of blood glucose values where the meter has proven to be accurate.

Does dehydration affect CGM? ›

If you are sick, dehydrated, or if the sensor is not inserted properly, the results on your rtCGM or isCGM may be higher or lower than they actually are.

How often should I check my CGM? ›

Your healthcare professional may suggest a CGM or blood sugar testing 4 to 10 times a day if you have type 1 diabetes. You may need to test: Before meals and snacks, and sometimes after meals. Before, after and sometimes during exercise.

How many CGM readings does a G6 provide every 24 hours? ›

Continuous glucose monitoring (CGM) devices provide real-time blood sugar readings 24 hours a day, allowing people with type 1 or type 2 diabetes to closely track blood glucose levels and trends. Most CGMs report blood sugar levels every five minutes; that's a total of 288 glucose readings per day.

What is the maximum glucose reading for FreeStyle Libre? ›

FS-Libre-US: Understanding Sensor Readings (Reader) Note: While Sensor glucose readings are gathered in the System range of 40-500 mg/dL, the graph display range is 0-350 mg/dL for ease of review on screen.

Is CGM or blood glucose more accurate? ›

The bottom line is that fingerstick testing still gives the most accurate results of your glucose level. Many things can affect the accuracy of your CGM reading, including how your device is calibrated, its sensor chemistry, and your own body chemistry.

How often do you check your blood sugar with CGM? ›

Your healthcare professional may suggest a CGM or blood sugar testing 4 to 10 times a day if you have type 1 diabetes. You may need to test: Before meals and snacks, and sometimes after meals. Before, after and sometimes during exercise.

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