If the sensor insertion can consume glucose, does that mean the level measured would be lower then?
All my readings are significantly higher than what they should be.
Also, if the manufacturer knows that the first day or so could lead to random results, why don't they just discard the first day of results? There does not seem to be an option to discard readings/periods
My post was intended to answer your question about why people generally attach a while before activating, not why your particular sensor is dubious.
The American version, which was only approved by their FDA a few months ago, has a 12 hour warm up time for that reason: letting it settle down to accomodate natural repair mechanisms and foreign body responses - looks like they've learned from their European forebears who've been using it for a couple of years now.
I've been using libre for about 18 months now. For the last 5, along with a small bluetooth transmitter which turns it into cgm and lets me iron out the sort of inaccuracies you're seeing.
I've used getting on for 40 sensors. I'm not going to pretend they are perfect. Most are ok, but some are plain sketchy. Abbott have normally replaced those. Maybe you've had bad luck and got a sketchy one.
It takes a few months of using them before you can make a judgment call on whether it's a "good" or "bad" sensor.
The science going on here is hugely complex: an enzyme on the sensor filament, glucose oxidase, is breaking down passing glucose into other chemicals, giving off electrons, which are measured as an electric current, represented as a number, which is then turned into a guess about what that number means as a bg level.
What could possibly go wrong in that situation? Obviously, lots of things.
I'm T1. I need to inject insulin several times a day to not die, and some of the judgment calls I make about those shots, if I get them wrong, might put me in a situation which would make a bad lsd trip seem pleasant.
Despite libre's imperfections, I've figured out ways to use it in ways which make my life significantly easier. Heads up on hypos, for a start, and quite a few other things.
I've got very little patience for non-T1s who use it for a few days and complain about it, "not being the same as my meter". They have failed to understand the complexities of it.
You might just have a rogue sensor, in which case Abbott will likely replace it. If you don't trust it, stop using it.