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Freestyle Libre 3 Continuous Glucose Monitor
The Freestyle Libre 3 is Abbott's latest CGM system, offering real-time glucose readings without scanning and the world's smallest glucose sensor.
Technical Specifications
- Sensor Duration: 14 days
- Warmup Time: 1 hour
- MARD: 7.9% (Mean Absolute Relative Difference)
- Sensor Size: 0.2 inches high x diameter of a penny
- Reading Frequency: Every minute (1,440 readings per day)
- Bluetooth Range: Up to 33 feet
- Water Resistance: IPX8 (3 feet for up to 30 minutes)
- Age Indication: 4+ years old
- Calibration: Factory calibrated (no fingersticks required)
Alternative CGM Options
- Dexcom G7 - 10-day wear, pump integration
- Guardian 4 - Medtronic system with pump integration
Key Features
Hardware
- World's smallest glucose sensor
- One-piece applicator design
- Real-time glucose readings
- No receiver required
- Environmental sustainability (40% less plastic)
Software
- Automatic glucose readings
- Optional scanning capability
- Customizable alarms
- Trend arrows
- Pattern detection
- 14-day wear period
Mobile App Features
Core Functions
- Real-time glucose data
- Customizable high/low alerts
- Glucose trend arrows
- Historical data analysis
- Food logging
- Insulin dose logging
Reports
- Daily patterns
- Time in range
- Average glucose
- Low glucose events
- Ambulatory glucose profile (AGP)
- Downloadable reports
Accuracy and Performance
Advantages
- No fingerstick calibration required
- Readings every minute
- High accuracy (7.9% MARD)
- Quick warm-up period
- Consistent performance
Limitations
- Accuracy during rapid changes
- Potential pressure-induced lows
- Limited placement sites
- Bluetooth connectivity requirements
Common Issues and Solutions
Sensor Adhesion
- Use skin preparation products
- Consider barrier films
- Apply over-patches if needed
- Clean site thoroughly
- Avoid high-movement areas
App Connectivity
- Keep Bluetooth enabled
- Stay within range
- Check phone compatibility
- Regular app updates
- Clear app cache periodically
Reading Accuracy
- Avoid compression
- Hydration affects
- Temperature considerations
- Activity impact
- Medication interference
Tips for Success
Application
- Choose proper site location
- Clean site thoroughly
- Allow skin to dry completely
- Apply sensor firmly
- Wait full warm-up period
Maintenance
- Monitor adhesion
- Keep phone nearby
- Regular app updates
- Document sensor changes
- Monitor site reactions
Insurance and Cost
- Sensor Cost: ~$130-140 per sensor
- Monthly Cost: ~$260-280
- Insurance Coverage: Varies by provider
- Prior Authorization: Often required
- Medicare Coverage: Available
- FSA/HSA Eligible: Yes
Resources
Official
Support
- Customer Service: 1-855-632-8658
- Technical Support
- Online Resources
- Training Videos
Community
- Reddit: r/freestyle_libre
- Facebook Groups
- Diabetes Forums
- Local Support Groups
Related Techniques
- Exercise Management with CGM data
- Sick Day Rules for sensor management
Data Integration
Compatible Apps
- LibreView
- Apple Health
- Google Fit
- Various third-party apps
Healthcare Integration
- Provider portal access
- Electronic health record integration
- Clinic data sharing
- Remote monitoring capabilities