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CGM machines .

Discussion in 'Ask A Question' started by Susiespearish, Jan 28, 2016.

  1. Susiespearish

    Susiespearish Type 2 · Well-Known Member

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    Thank you LucySW and tims2000 Much clearer :)
     
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  2. CapnGrumpy

    CapnGrumpy Type 1 · Well-Known Member

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    I didn't realise that the Libre effectively took readings every 15 minutes in the background, so sorry for the duff information.
     
  3. novorapidboi26

    novorapidboi26 Type 1 · Well-Known Member

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    So what is stopping the device from scanning say every hour without any manual scan.....?
     
  4. robert72

    robert72 Type 1 · Well-Known Member

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    It's Near Field Communication (NFC) rather than bluetooth, so it can't transmit more than about 4 inches/10 cm
     
  5. novorapidboi26

    novorapidboi26 Type 1 · Well-Known Member

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    thanks robert....

    just wondering why we need to scan at all if its capable of taking readings.....

    is this in order to calibrate if needed....
     
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  6. robert72

    robert72 Type 1 · Well-Known Member

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    You have to press a button on the device to take a scan, it then captures the last 8 hours data from the sensor and stores it on the reader, so you can see the current reading and a graph of your levels for the last 8 hours (and all the history for the last 2-3 months). It's very rare that I sleep for more than 8 hours, so scanning is really not a problem. You can't calibrate the Libre as it's factory calibrated.
     
  7. tim2000s

    tim2000s Type 1 · Expert
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    So if it's out, you essentially have to estimate how much in your head.
     
  8. tim2000s

    tim2000s Type 1 · Expert
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    Just to be clear though, it is purely a recording and finger prick replacement device. It does not provide a realtime stream of data.
     
  9. novorapidboi26

    novorapidboi26 Type 1 · Well-Known Member

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    Im just trying to ascertain whether the last 8 hours of data, a nice graph in this case, is just the device joining the dots if you like, between one physical scan to the next....
     
  10. AndBreathe

    AndBreathe I reversed my Type 2 · Expert
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    Definitely not just joining the dots, else the score between scans (which are reported differently on the data download) would all be the same as the previous scan. That isn't the case.

    I have to say, I doubt there is anyone who wouldn't learn something being able to review full-time data for a couple of weeks.

    As a T2, with non-diabetic HbA1c levels, I can't justify using the Libre full time, but I definitely learned some "stuff".
     
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