I wrote
last month about my diabetes diagnosis this year and my
difficult choice to wear a proprietary device (called a
CGM) on my arm 24/7
to continuously monitor my glucose levels. Like my friend and colleague,
Karen M. Sandler — who previously made a much higher-stakes choice to
receive a proprietary implanted defibrillator to keep her safe given her
genetic heart condition — I reluctantly chose to attach proprietary
hardware and software to my body.
I eventually figured out that the Freesytle Libre will significantly underread if you sleep on it. I would recommend doing a finger prick test before acting upon what a CGM tells you to do.
I’ve found this is really dependent on placement. If I put my libre a couple of centimeters away from the region I usually use, it’ll read low all night, but as long as I stick to the zone I’ve determined to be fine, it’ll agree with a blood test even if I’ve had pressure on it for ages. Also, the 3 is more forgiving than the 1 or 2 because it’s smaller than the older models, so affects how much the skin bends and squishes less.
Found that on day one, pretty sure it’s even in the instructions not to put the sensor somewhere you’ll put pressure on.