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Very low readings on Freestyle Libre
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<blockquote data-quote="Scott-C" data-source="post: 1966818" data-attributes="member: 374531"><p>This actually reminds me of my very first sensor more than two years ago!</p><p></p><p>I didn't know about the 24 hr pre-attachment gig at the time, so just attached and activated.</p><p></p><p>I decided I was going to test more frequently than I normally do just to get a clearer idea of how it worked.</p><p></p><p>The first few hours were absolutely fine, then it started to wander, so I thought, what's going on here, it was showing artificial lows, so like you I thought I'd been sold a pup. But it settled down ok the next day.</p><p></p><p>The only thing I can think if to explain this is that maybe the response mechanisms take several hours to kick in, so it reads ok to begin with, then wanders till things are fixed and foreign body response realises it's not going to win.</p><p></p><p>I recall I crashed skiing years back, hobbled off the slope but wasn't in much pain, but about 6 hrs later, it was absolute agony, turned out I'd torn a knee ligament. That suggests that the wide variety of bodily processes can take a while to start, ao maybe something similar is going on with libre, but I'm just speculating.</p><p></p><p>If you're interested in the science behind it, there's a lengthy technical article about it at the link below.</p><p></p><p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2903977/" target="_blank">https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2903977/</a></p><p></p><p>The science is way beyond me, it's aimed at doctors, but it's an interesting review of the history of cgm, the problems, and the difference between bg, which your meter measures, and ifg, which libre measures.</p><p></p><p>It's where I first read the snippet about how repair and fbr mechanisms suggest settling time is a good idea before activating (so I didn't just make that bit up - doctors say it's true!)</p><p></p><p>You've not mentioned your diabetes type. If you're T1, I found Sugar Surfing by Stephen Ponder, a few quid on kindle, really useful when I first used libre. Lots of tips on getting the most out of cgm. The hospital I attend recommends it as further reading in their cgm guidance, so he's not a crank.</p></blockquote><p></p>
[QUOTE="Scott-C, post: 1966818, member: 374531"] This actually reminds me of my very first sensor more than two years ago! I didn't know about the 24 hr pre-attachment gig at the time, so just attached and activated. I decided I was going to test more frequently than I normally do just to get a clearer idea of how it worked. The first few hours were absolutely fine, then it started to wander, so I thought, what's going on here, it was showing artificial lows, so like you I thought I'd been sold a pup. But it settled down ok the next day. The only thing I can think if to explain this is that maybe the response mechanisms take several hours to kick in, so it reads ok to begin with, then wanders till things are fixed and foreign body response realises it's not going to win. I recall I crashed skiing years back, hobbled off the slope but wasn't in much pain, but about 6 hrs later, it was absolute agony, turned out I'd torn a knee ligament. That suggests that the wide variety of bodily processes can take a while to start, ao maybe something similar is going on with libre, but I'm just speculating. If you're interested in the science behind it, there's a lengthy technical article about it at the link below. [URL]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2903977/[/URL] The science is way beyond me, it's aimed at doctors, but it's an interesting review of the history of cgm, the problems, and the difference between bg, which your meter measures, and ifg, which libre measures. It's where I first read the snippet about how repair and fbr mechanisms suggest settling time is a good idea before activating (so I didn't just make that bit up - doctors say it's true!) You've not mentioned your diabetes type. If you're T1, I found Sugar Surfing by Stephen Ponder, a few quid on kindle, really useful when I first used libre. Lots of tips on getting the most out of cgm. The hospital I attend recommends it as further reading in their cgm guidance, so he's not a crank. [/QUOTE]
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