Sensor Detachment/Sensor fall off

Applicable Scenario

This article applies when a distributor needs to provide official, practical guidance to users who report that the sensor has become detached from the skin, the adhesive patch is lifting at the edges, or the entire sensor has fallen off before the end of the wear period. It is also intended for standard troubleshooting of sensor adhesion and wear-related detachment issues.

This article does not apply if the user reports that a component of the sensor became detached, part of the device came loose or separated, the sensor was damaged during assembly or application, or the sensor displayed an error immediately after application. In these situations, refer to the corresponding article for structural damage, assembly issues, or guide needle retention instead.

 

1. What are the common factors that can cause a sensor to detach?

A sensor’s adhesion can be compromised by a combination of improper application, environmental exposure, and physical interference. The primary influencing factors are:

Application Area Preparation:

• Inadequate Cleaning: Natural skin oils, lotion, or dust on the application site can prevent the adhesive from bonding correctly.
• Insufficient Drying: Applying the sensor to damp skin after cleaning, without waiting for the area to air-dry completely, significantly weakens the adhesive.

Wear-Time Physical Interference:

• Direct Impact: Accidental bumps or scrapes against hard surfaces (e.g., door frames, walls, furniture) can dislodge the sensor.
• Clothing Friction: Repeated rubbing from tight clothing or the act of pulling clothes on and off over the sensor site.
• Excessive Sweat: Profuse sweating during intense physical activity can gradually weaken the adhesive bond.

Environmental Exposure:

• Prolonged Humidity: Activities like long showers, baths, or swimming expose the adhesive to a persistently humid environment, which accelerates loosening.
• Towel Rubbing: Unintentional and direct rubbing from a towel while drying off can easily catch and lift the sensor’s edges.

 

2. How can a user prevent the sensor from detaching prematurely?

To ensure the sensor remains secure throughout the entire wear period, users should follow a three-stage approach: preparation, reinforcement, and protection during wear.

Stage 1: Optimal Skin Preparation

1. Clean and Disinfect: Wash the application area with soap and water or use an alcohol wipe. This removes oils that act as a barrier to adhesion. Wipe an area slightly larger than the sensor itself.
2. Ensure Complete Dryness: This is a critical step. After cleaning, wait for 2-3 minutes to allow the skin to air-dry completely before applying the sensor. Do not fan or blow on the area, as this can introduce contaminants.
3. Smooth the Skin: For users with wrinkled skin or looser skin texture, gently flatten the skin with one hand during the application to ensure a smooth, seamless fit with no gaps or folds under the adhesive patch.

 

Stage 2: Effective Reinforcement

1. Use the Overpatch: The provided overpatch is a vital tool for securing the sensor. Apply it smoothly over the sensor, making sure the edges are completely flush with the skin with no wrinkles.
2. Additional Reinforcement (If Needed): For active users or in high-risk scenarios, medical-grade adhesive reinforcement patches can be used as an extra measure over or around the overpatch.

 

Stage 3: Protective Practices During Wear

1. Reduce High-Impact Activities: Limit vigorous exercises that cause heavy sweating or sudden movements, such as running, weightlifting, competitive sports, and diving.
2. Be Cautious Around Obstacles: Maintain mindful awareness of the sensor’s location to avoid bumping or scraping it against common objects like doorframes, chairs, and walls.
3. Handle Clothing with Care: When dressing or undressing, be gentle and deliberate to prevent the fabric from catching on the sensor or overpatch.
4. Practice Careful Bathing: While a quick shower is generally acceptable, avoid prolonged bathing, hot tubs, or swimming. When toweling dry, gently pat the area around the sensor instead of rubbing it.
5. Mind Recreational Activities: Be aware of playful or casual physical interactions (e.g., with children or pets) that could cause an accidental scrape."