Why is my Dexcom Sensor not connecting to my automated insulin pump and what can I do to minimise my time out of automated mode?
With all (Hybrid Closed Loop (HCL) / Automated Insulin Delivery (AID) systems, Dexcom sensor readings from your continuous glucose monitor (CGM) system need to be communicated to the insulin pump to maximise the time it is in its automated mode. When the insulin pump is not receiving a signal from the sensor, the pump will continue to ensure a programmed delivery of insulin, but it will not mimic physiological insulin delivery. It is therefore extremely important that you do everything you can to minimise signal loss to the insulin pump.
What can I do to minimise signal loss?
There are many reasons why your Dexcom sensor may not be connecting to your insulin pump.
If it will not connect at all, this could be due to compatibility issues, Bluetooth settings, or missing software updates.
Make sure
- Your pump model supports the Dexcom sensor you are using
- Bluetooth is turned on and both devices are paired
- You have followed the placement and insertion instructions for both devices
If the issue is intermittent, it could be due to the signal being restricted. The Dexcom sensor and the automated insulin pump communicate via Bluetooth. Bluetooth connectivity can be restricted by several factors including physical obstructions, signal conflicts and electromagnetic interference.
The body itself can act as a physical obstruction which prevents the Dexcom sensor and the automated insulin pump from communicating. Therefore, it is extremely important that the devices can “see” each other. This is referred to as “Line of Sight”. Dexcom G7 is approved for wear on the arm and abdomen, and ages 2-6 can also wear G7 on the upper buttocks*. Always consider placement and whether the devices can “see” each other. Specific guidelines for line of sight and minimising signal loss can be found on the automated insulin pump manufacturers websites. Remember that the sensor should be a minimum of 8cm* away from the insulin pump insertion site.
If you have a tubed pump, always make sure the pump screen is facing out, when it is in a pocket or pouch.
What should I do if I experience Signal Loss to my insulin pump?
If you receive a signal loss alert on your automated insulin pump, always check if you also have signal loss on the Dexcom product app†. If you have signal loss on both devices, wait up to 30 minutes. If the signal does not resolve itself contact Dexcom Technical support on 0800 031 5763.
If the Dexcom CGM and app are connected but do not have a signal to your insulin pump then contact the insulin pump company for further trouble shooting.
Specific guidelines for line of sight and minimising signal loss can be found on the automated insulin pump manufacturers websites.
* Please refer to the Dexcom G7 user guide for full information
† Dexcom product app is not required to be used with all automated pump manufacturers.
† Dexcom product app is not required to be used with all automated pump manufacturers.
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