- advertisement -

Weird Dexcom Calibration

Discussion in 'Continuous Glucose Sensing' started by funnygrl, Jul 1, 2014.

  1. funnygrl

    funnygrl Approved members

    Joined:
    Nov 2, 2005
    Messages:
    2,324
    Dexcom said 153 with the gradual up arrow. Tested my bg. 156. I calibrated. The number on the Dexcom changed to 143 with a gradual up arrow. Why would it go down when I calibrated to a slightly higher number?
     
  2. kiwikid

    kiwikid Approved members

    Joined:
    Dec 29, 2005
    Messages:
    3,011
    Ours always does weird stuff like that - something about the algorithm and it knew it should be behind the blood bg ( time lag) so dropped back knowing it was rising..
    very very clever this technology
     
  3. Mish

    Mish Approved members

    Joined:
    Aug 20, 2009
    Messages:
    1,393
    I think it's taking into account that there is supposed to be lag time on the dexcom. That number displayed, (153 with an up) theoretically, should match up with what your finger stick bg was about 15 minutes ago. So, when it re-calibrated to a lower number, it was just taking into account that if you're 156 now by finger stick, about 15 minutes ago you were probably in the area of 143, not 153.

    Or it's magical stuff that I don't understand. ;)
     
  4. funnygrl

    funnygrl Approved members

    Joined:
    Nov 2, 2005
    Messages:
    2,324
    This is kind of along the lines of what I was thinking.
     
  5. Mommy For Life

    Mommy For Life Approved members

    Joined:
    Aug 29, 2011
    Messages:
    548
    Our dex rep said something along these lines when DD started CGMing...

    I am not sure I would have calibrated a 3 point difference between the dex to the meter. Do others calibrate when it is that close? :confused:
     
  6. sszyszkiewicz

    sszyszkiewicz Approved members

    Joined:
    Dec 24, 2013
    Messages:
    842
    If he does a fingerstick we generally calibrate regardless, taking advantage of the data point when it comes our way.
     
  7. funnygrl

    funnygrl Approved members

    Joined:
    Nov 2, 2005
    Messages:
    2,324
    I've mainly by sticking with my Medtronic calibration habits- calibrate when steady, try and get blood sugars across the spectrum. Seems I can calibrate when less steady and more often with the Dexcom, though. I'm on day 11 of this sensor and my accuracy seems to be sinking.
     

Share This Page

- advertisement -

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice