When the FDA is approving integrated systems from different companies, an important part of the approval process is very clearly defined procedures for which company supports which portion of the integrated system.
In terms of the Dexcom G6 sensors when being used in an integrated manner with the Tandem t:slim X2 pump, the demarcation line is the conclusion of the two-hour sensor warm-up period.
A sensor issue which occurs prior to the conclusion of the two-hour warm-up such as a G6 sensor insertion issue would be picked up by Dexcom technical support.
A sensor issue which occurs after the two-hour warm-up has completed such as a G6 sensor that does not last the full 10 days would be picked up by Tandem technical support.
As everybody using these systems should be aware, both Dexcom and Tandem have technical support which is always open. 24 hours per day, 7 days per week.
A typical question which Technical Support asks is the lot number of the sensor so it is helpful to retain the box until you are completely done with all the sensors which came in the box. As well, it is not unusual for technical support to send a product return kit such that a failed sensor can be returned to them. Point being if you are planning to call technical support for a sensor issue, do not dispose of the sensor prior to the call and determining if Tech Support wants it sent back.