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Dexcom G4, 5 bad sensors in the past 6 months, working sensor age max 8 days

Discussion in 'Continuous Glucose Sensing' started by karri, Jul 5, 2014.

  1. karri

    karri Approved members

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    So the title pretty much says it.
    Running with g4 since it came out in Europe, before that dex7, so have some knowledge about the things.

    Past 6 months have been really hard sensor-wise
    1) Multiple failed sensors (goes to ??? in 2-hour calibration phase / even after several restarts).
    2) Sensor will only last about 8 days (so 7 days + restart, runs 1 full day after that and then its ??? all day long)

    Transmitter is brand new.

    Has anyone else seen anything similar?
     
  2. kiwikid

    kiwikid Approved members

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    We've only just started with G4 but we can't get any more than 7 days anyway.... do you keep track of lot numbers? I know that 3 of us here in NZ have had really bad sensors from one lot.
     
  3. karri

    karri Approved members

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    Kiwikid,

    1) Was this 7-day max also happening with dex 7?
    2) What happens after 7 days? ??? or sensor failure or unreliable numbers?
    3) Yes, keeping track of the lot numbers, have to report those to get replacements. This was lot 5134536. Total failure count for that lot is now 2.
    4) Whats the sensor policy in NZ? Out-of-own-pocket/insurance covered/goverment pays some/goverment pays all?
     
  4. kiwikid

    kiwikid Approved members

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    We didn't use Dex 7 for long and only had a second hand system but yes we got more than 7 days.
    We are getting lots and lots of ??? for hours at a time... more ??? than readings. We've had one sensor fail message on our Vibe pump but the rest we just stop because they don't read. When we do get numbers they seem accurate.
    Lot 5145427 exp 14/4/15 was the worst
    Sensors are completely out of pocket here - no insurance or government subsidies at all, for anyone
     
  5. karri

    karri Approved members

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    Very interesting.
    So we initially started with gen4 back in 08/2012 when it came out in Europe.
    Throughout 2012 and 2013 average lifespan of sensor was somewhere between 10-14 days. And suddenly in2014 it really went down, to 7 days. We get exactly the same behaviour as you described, more ??? than readings..

    Same OOP thing here in Finland aswell.
     

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