Where you place a Dexcom G7 sensor can make a difference in comfort, sensor adhesion, and performance. If you are using the G7 for the first time, it is normal to wonder where the sensor should go and which areas are better to avoid.
For adults, Dexcom indicates the back of the upper arm as the placement site for the G7. Choosing an area with enough fatty tissue and keeping the sensor away from places that experience pressure, friction, or frequent movement can help make the sensor easier to wear.
Best Dexcom G7 Placement for Adults
The back of the upper arm is the primary placement area for adults using the Dexcom G7. Dexcom's guidance indicates that research found this location provided optimal system performance.
When choosing the exact spot on your arm, look for an area with enough tissue to avoid placing the sensor directly over muscle or bone. It should also be somewhere that is unlikely to get bumped or pressed during normal activities.
For detailed guidance, you can review Dexcom G7 Placement for Adults before applying a new sensor.
Why the Back of the Upper Arm Is Commonly Used
The upper arm offers a practical location for many adults because the sensor can sit away from areas that experience a lot of daily friction.
Dexcom's testing found optimal performance with back-of-upper-arm placement, which is why it is the indicated location for the G7.
It is still important to choose the exact spot carefully. Avoid placing the sensor where clothing constantly rubs against it or where you regularly lean or sleep.
Areas to Avoid
Finding an approved placement area is only part of the process. The specific spot also matters.
Dexcom recommends avoiding areas:
With very little fatty tissue or directly over muscle or bone
That are frequently bumped or pushed
Where you normally lie while sleeping
Close to an insulin injection or pump infusion site
Near a waistband
With irritation, scarring, or tattoos
Where excessive hair could interfere with application or adhesion
The sensor should also be placed at least 3 inches (8 cm) away from an insulin injection or pump infusion site.
Should You Use the Same Spot Every Time?
It is better to rotate your sensor placement rather than repeatedly using exactly the same area.
Using the same location too often can give the skin less time to recover and may contribute to irritation or scarring. Dexcom recommends changing the insertion site with each new sensor.
You can alternate between suitable areas on your upper arms so that one side gets time to recover while you use the other.
What About the Abdomen?
You may find older Dexcom information or information about other Dexcom models that mentions the abdomen. This can cause confusion when searching online.
For the current U.S. Dexcom G7, Dexcom's U.S. guidance specifies the back of the upper arm for users age 2 and older. The upper buttocks is an indicated option for children ages 2–6.
Because placement indications can differ between products and markets, it is best to follow the instructions that came with your specific sensor.
How to Keep Your G7 Secure
Once you have selected an appropriate site, clean the area according to the manufacturer's instructions and allow it to dry before applying the sensor.
The G7 includes an overpatch, which Dexcom recommends using to help keep the sensor in place during the wear period.
If you exercise, sweat frequently, or have problems keeping sensors attached, paying attention to skin preparation and using the included overpatch can be especially helpful.
Getting a Dexcom G7 Through a DME Supplier
Finding the right sensor is only one part of using a CGM. You also need a reliable way to obtain replacement sensors when your current one expires.
CGM Monitors provides Dexcom G7 sensors and other continuous glucose monitoring supplies. The company also offers an insurance-based ordering process for eligible patients and can help with insurance verification and other DME requirements.
If you need a Dexcom G7 through insurance, coverage depends on your insurance plan and eligibility. CGM Monitors states that most of its product range can be billed to insurance and that its team can assist with eligibility verification, prior authorization, coinsurance checks, and claims submission.
Final Thoughts
For adults using the Dexcom G7, the back of the upper arm is the indicated placement area and is also the location where Dexcom reports optimal performance. Choosing a spot away from pressure, irritation, clothing friction, and injection or infusion sites can make everyday sensor use more comfortable.
Always follow the instructions provided with your specific Dexcom system, and speak with your healthcare provider if you are unsure about sensor placement.
If you are looking for a Dexcom G7 through insurance, CGM Monitors can also help eligible patients with the DME ordering and insurance process.
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