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Freestyle Libre Accuracy
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<blockquote data-quote="SNW" data-source="post: 2040902" data-attributes="member: 505730"><p>I have been using Freestyle Libre for about 2 years - paying for it all myself. I have trusted the system as it seemed to correspond with how I was feeling and hardly ever checked with a finger prick. However a few months ago I was sick with an infection and my BG readings went very high. Paramedics were called by my GP and I was put on insulin for the first time. In all this nobody took a blood reading and all were content to believe the Freestyle sensor. So I started to do comparisons myself. As an example I found that when the sensor said 22, a finger prick said 14. I now have dozens of readings, from 3 different sensors, that show they permanently over-read by between 20% and 40% even allowing 20mins between the blood and the sensor readings. This morning the sensor said 9.7 (which I regard as high and something I would deal with by medication) whereas 2 finger pricks with 2 different systems (Abbott and Accucheck) said 5.2 (which I would regard as normal - no action required). At no time over the course of the last month has the sensor reading been within 25% of the blood reading.</p><p></p><p>I am now very concerned and a little scared as I don't know what to trust - my GP has advised me to abandon Freestyle. I have reported every incident to Abbott and the only practical reaction is to offer to send me a replacement sensor. When I say that they have already sent me 6 replacements due to inaccuracies and I'd rather have a solution, the only response is to send a new sensor any way and deny that the system over-reads to this extent.</p><p></p><p>I am a cyclist and knowing my BG readings - especially before and during long rides - is essential; but I don't want to have to take a finger prick kit with me especially when riding on wet days with mucky roads. I wonder if anyone has had a similar experience with the system or any suggestions. I have previously tried the Dexcom system but found it too expensive and very easy to screw up the application of the sensor.</p></blockquote><p></p>
[QUOTE="SNW, post: 2040902, member: 505730"] I have been using Freestyle Libre for about 2 years - paying for it all myself. I have trusted the system as it seemed to correspond with how I was feeling and hardly ever checked with a finger prick. However a few months ago I was sick with an infection and my BG readings went very high. Paramedics were called by my GP and I was put on insulin for the first time. In all this nobody took a blood reading and all were content to believe the Freestyle sensor. So I started to do comparisons myself. As an example I found that when the sensor said 22, a finger prick said 14. I now have dozens of readings, from 3 different sensors, that show they permanently over-read by between 20% and 40% even allowing 20mins between the blood and the sensor readings. This morning the sensor said 9.7 (which I regard as high and something I would deal with by medication) whereas 2 finger pricks with 2 different systems (Abbott and Accucheck) said 5.2 (which I would regard as normal - no action required). At no time over the course of the last month has the sensor reading been within 25% of the blood reading. I am now very concerned and a little scared as I don't know what to trust - my GP has advised me to abandon Freestyle. I have reported every incident to Abbott and the only practical reaction is to offer to send me a replacement sensor. When I say that they have already sent me 6 replacements due to inaccuracies and I'd rather have a solution, the only response is to send a new sensor any way and deny that the system over-reads to this extent. I am a cyclist and knowing my BG readings - especially before and during long rides - is essential; but I don't want to have to take a finger prick kit with me especially when riding on wet days with mucky roads. I wonder if anyone has had a similar experience with the system or any suggestions. I have previously tried the Dexcom system but found it too expensive and very easy to screw up the application of the sensor. [/QUOTE]
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