Sensor life time

When considering a lifetime, it is necessary to distinguish between the lifetime presented by the manufacturer and approved by various drug administration authorities and the physical lifetime of the device itself.

According to the User guide of the Medtronic’s continuous glucose monitoring system, the sensor should be removed after 72 hours of operation and replaced by the new one. The algorithms built in Paradigm 522 and Paradigm 722 pumps stop measuring after:

Physically, the sensor life time is determined by the time when its calibration factor is stable and the sensor gives reliable interstitial glucose values. There are two typical cases of sensor expiration that should initiate its replacement:

Usually, I keep sensors inserted for 6 days. The best and most reliable cycle of changing sensors I have found in my case is: