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Sensor Insertion and Site Rotation
Proper sensor insertion technique and regular site rotation are essential for accurate CGM readings and skin health.
Sensor Insertion and Site Rotation
Introduction to CGM Sensors
CGMs use small sensors inserted under the skin using an automatic inserter device. The process is generally quick and relatively painless.
Approved Insertion Sites
Common FDA-approved sites include:
- Abdomen (most common)
- Upper arm (posterior area)
- Upper buttocks (some devices)
Always check your specific device's approved sites.
Insertion Best Practices
Preparation
- Clean the site with alcohol and let dry completely
- Avoid lotions, oils, or creams
- Ensure skin is at room temperature
During Insertion
- Follow manufacturer instructions exactly
- Apply firm pressure during applicator use
- Hold in place for recommended time
After Insertion
- Apply additional adhesive if needed
- Wait for warm-up period to complete
- Note the insertion date and site location
Site Rotation
Why Rotate?
- Prevents skin irritation and tissue damage
- Ensures accurate readings (avoids scarred tissue)
- Reduces risk of infection
- Maintains sensor performance
Rotation Schedule
- Change sides with each new sensor
- Avoid recent puncture sites for 1-2 weeks
- Keep a site rotation log
Common Issues
- Bleeding during insertion: Usually resolves; may affect accuracy initially
- Sensor falling off: Use additional adhesive options
- Pain at site: May indicate poor placement; remove if persistent