Haven't seen thread but will look.
There was a Thread titled "Libre 2 Trial" c.8 & 9 March 22 on the General Message Board. At post #20 I wrote:
There are some limitations with Libre and I deliberately didn't push these to you previously, but you may find the detail below informative and useful. I captured these from
@helli on 23 Dec 21 and I just added a couple of nuances/comments from that capture:
"My advice would be to be fully aware of the limitations of libre.
- it may be less accurate for the first couple of days. Many of us insert it 48 hours before activating.
- it is calibrated to be accurate for “normal“ readings (between 4 and 10mmol/l). Therefore, always check with a finger prick test before correcting treating a hypo or correcting a high.
- Libre does not read blood sugars, which finger pricking does. It reads interstitial fluid which is behind blood sugars: claimed by Abbott as 2.1 mins for children and 2.4 mins for adults, more usually c.5mins and up to 15 mins. Libre 2 extrapolates the current trend to predict the last 15 minutes. This is fantastic most of the time. However, if the trend changes, it can over shoot. This is especially important when treating a hypo - always check your hypo has finished with a finger prick and treat again if still low; Libre will lag and could undershoot, saying you are still low even when recovery is happening - so trust your finger prick result.
- sometimes a rapid change confuses the sensor algorithm and it stalls, giving a Sensor Error message code 373; try again in 10 mins.
- some Libre sensors are faulty. If you have a sensor which is always off by a couple of mmol/l or reports a fault, report it to Abbott by phone (or e-mail). They will probably replace it and may ask you to return the faulty sensor so don’t throw it away.
- if your sensor falls off, Abbott have been known to replace the sensor if the adhesive is poor for your skin. There are several suggestions in this forum for improving adhesion or protecting the sensor.
Once you have got used to Libre, you can look to do things like:
- look for trends which suggest you need to pre-bolus earlier or later.
- look for trends which may suggest your basal isn't lasting between doses.
- see what happens overnight (do you experience Dawn Phenomenon or Foot on the Floor syndrome?).
- see what happens with exercise and general activity.
- you can use the phone app of LibreLink; or register and go to the LibreView website for more detailed analysis and reports.
If you are tech minded, you may want to consider converting Libre 2 to a CGM so you don’t need to scan it. There are a number of options for this depending upon your phone, whether your diabetes team are checking your readings online and how techy you are. But they are not official and written by techies for techies."
NB Diabox is written by a diabetic techie for diabetics.
There are other remarks about limitations around the forum, I just thought most of what helped was written by @helli last December.
