Medtronic Guardian Sensor 3

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Medtronic Guardian Sensor 3

The Medtronic Guardian Sensor 3 is an enzyme-based continuous glucose monitoring (CGM) sensor designed to measure interstitial glucose day and night and transmit data (via a compatible Medtronic transmitter and receiver/app) to help you see glucose trends, patterns, and alerts. By providing frequent readings and directional arrows, it supports more informed decisions around food, insulin, and activity.

Each single-use sensor is designed for multi-day wear (typically up to 7 days, as directed) and sits just under the skin with a low-profile adhesive patch for comfortable, everyday use. When paired with compatible Medtronic systems, the Guardian Sensor 3 can enable alerts for rising or falling glucose and integration with selected insulin pumps or the Guardian Connect app (compatibility varies—check your device documentation).

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Active Components / What’s Inside

• Glucose-oxidase enzyme sensing element – generates an electrochemical signal proportional to interstitial glucose.

• Flexible sensor filament – fine, subcutaneous filament to detect glucose in interstitial fluid.

• Medical-grade adhesive patch – helps keep the sensor in place during daily activities.

• Single-use sterile packaging – sensor is disposed of after the wear period (transmitter not included).

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Reasons to Use

• You want near real-time glucose insight between fingerstick checks.

• You’d like trend arrows and alerts to support day-to-day decision-making.

• You prefer a multi-day wear sensor with a discreet, low profile.

• You use a compatible Medtronic transmitter/system and want integrated data.

Reasons Not to Use

• Allergy/sensitivity to adhesives or any sensor materials.

• If you cannot (or have been advised not to) perform required calibrations or fingerstick confirmations when prompted.

• MRI/CT/diathermy: remove sensor/transmitter prior to such procedures per device instructions.

• Not for diagnosis or treatment decisions in isolation—confirm with a blood glucose meter if symptoms do not match readings or when the system prompts you.

• Do not use if packaging is damaged, past expiry, or if advised otherwise by your healthcare professional.

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Advantages

• Frequent readings and trend arrows to see where glucose is heading.

• Customisable alerts (when used with compatible systems).

• Low-profile adhesive for daily wear; water-resistant when used as directed.

• Integration with selected Medtronic pumps/apps for a connected experience.

Disadvantages

• Calibration and warm-up required as per device prompts and instructions.

• Sensor is single-use and must be replaced after the wear period.

• Adhesive-related skin irritation can occur in some users.

• Readings reflect interstitial (not capillary) glucose and can lag during rapid changes.

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Frequently Asked Questions (FAQ)

Q: How long can I wear each Guardian Sensor 3?
A: Typically up to 7 days per sensor, as directed by your healthcare professional and the device instructions.

Q: Do I need to calibrate it?
A: Yes. Follow the on-screen prompts and your user guide for calibration timing and fingerstick confirmation when required.

Q: What devices is it compatible with?
A: Guardian Sensor 3 works with specific Medtronic transmitters and selected MiniMed systems or the Guardian Connect app. Check your device’s compatibility guide or packaging.

Q: Is the transmitter included?
A: No. The transmitter is sold separately. This item is the sensor only (pack size varies by listing).

Q: Can I shower or exercise with it on?
A: When applied correctly and paired with the transmitter, the sensor assembly is designed for everyday activities. Always follow water-exposure and activity guidance in your user manual.

Q: Where do I insert the sensor?
A: Common sites include the abdomen or other locations approved in the instructions. Rotate sites to help maintain skin health.

Q: Do medications affect readings?
A: Some medical conditions or substances can influence CGM readings. Follow your user manual and consult your healthcare professional about your specific medicines.

Q: What should I do if symptoms don’t match the reading?
A: Perform a fingerstick with a blood glucose meter and follow medical advice. Treat symptoms first if you suspect hypoglycaemia.

Q: Any storage or handling tips?
A: Keep sensors in their original packaging, store within the specified temperature range, and use before the expiry date.

ALWAYS READ THE LABEL ON THE PRODUCT AND FOLLOW THE DIRECTIONS FOR USE UNLESS DIRECTED BY YOUR HEALTHCARE PROFESSIONAL.

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