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Continuous Glucose Monitoring (CGM) FAQs

How do I set up my continuous glucose monitor?

Setups vary by device, but generally CGMs are simple to set up.

Quick start guides for each of our CGM systems are below.

Dexcom G6
Abbott Freestyle Libre

 

How do I keep the sensor sticking to me?

Steps to follow to help keep your sensor in place:
1. Wash: use non-moisturizing, fragrance-free soap to clean the skin on the area you’re applying the sensor to.
2. Clean: Wipe the cleaned skin with the alcohol wipe provided in the sensor kit, this will remove any oily residue.
3. Dry: Allow your skin the time to fully dry before applying the sensor. This is especially important if you plan to apply the sensor after showering or swimming.

There are additional products that you can purchase to help the sensor adhere to your skin:

Over-Bandage A medical-grade adhesive, bandage or tape applied over the sensor
Torbot Skin Tac

A hypoallergenic latex-free “tacky” skin barrier
Tegaderm I.V.

A transparent film that provides adhesive strength
Skin-Prep Protective Barrier Wipes Protective liquid dressing that allows skin to breathe so tapes and films adhere better
Mastisol Liquid Adhesive Clear, nonirritating, non-water-soluble liquid adhesive that secures dressings

 

For additional tips and information, you can read the Adhesion Guide.

How do I get the adhesive residue off once I remove the sensor?

There are a few different techniques to ease the adhesive removal process and minimize the adhesive residue:
1. General technique: With a fingernail, and possibly the below listed products, loosen the edge of the adhesive. While removing the tape, use the fingers on the other hand to hold down the skin and push away from the adhesive. Keep moving the fingers on the skin toward the adhesive as it is peeled away.
2. Fold back technique: Remove adhesive slowly and at a low angle, folding the adhesive back on itself.
3. Stretch and relax technique: For the adhesive films that stretch, stretch a corner horizontally away from the center of the adhesive while walking fingers underneath the adhesive to continue stretching it.
4. Adhesive removal wipes: Rub the wipes on the skin and under the tape. This will help loosen the adhesive and can reduce any pain with removal as well.

Residue removal products available:

Uni-solve Adhesive Remover (Smith&Nephew)
AllKare Adhesive Removal Wipe (ConvaTec Inc.)
Tac Away Adhesive Removal Wipes (Torbot)
Detachol Adhesive Remover (Eloquest)
Household oils (baby oil, coconut oil, olive oil)

For more information on these products, see the Product and Description Guide.

Can I get the sensor wet?

In short, yes. When installed properly, the transmitters are water resistant. You can shower or swim with your CGM system. For more information about specific models, see the below information.

Dexcom G6

Abbott Freestyle Libre

 

What do I do if my sensor is malfunctioning?

If your sensor is malfunctioning, you will need to reach out to the manufacturer. Depending on your monitor, the applicable contact info is below:

Dexcom G6
Abbott Freestyle Libre

How do I dispose of used sensors?

It’s recommended following your local state guidelines. However, most states recommend using a sharps container.

How accurate are CGM readings to a true lab value?

Each CGM sensor is approved for accuracy based on the lab value that you get at the doctor’s office. A breakdown on each CGM system’s accuracy is below.

Dexcom G6
Abbott Freestyle Libre

Is there a difference from the reading on a self-monitored blood glucose test (SMBG) vs a CGM reading?

SMBG gives you a snapshot into what your glucose level is at that particular point in time, whereas CGM offers a more complete picture.

CGM offers a whole picture, measuring what is effectively real-time, as well as trends in your glucose levels to help you and your health team make better decisions about how to balance your food, physical activity, and medicines.

This short video helps break down the difference between a CGM reading and SMBG.

 

How do I set up the Dexcom Clarity App or the Abbott, Abbott LibreLink, or LibreView account?

A set-up guide for each are below.

Dexcom Clarity
Abbott Freestyle

Which phones and operating systems are compatible with the Dexcom Clarity App or the Abbott LibreLink App?

Most smartphones and operating systems are compatible with the Dexcom Clarity App and Abbott Libreview App. Specific device and operating system breakdowns can be found below for both.

Dexcom Clarity App

Abbot Libreview App