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Test monitor accuracy?
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<blockquote data-quote="Oldvatr" data-source="post: 2504068" data-attributes="member: 196898"><p>The meters should meet the requirements of the ISO standard 2013</p><p><a href="https://www.diabetes.co.uk/blood-glucose-meters/iso-accuracy-standards.html" target="_blank">https://www.diabetes.co.uk/blood-glucose-meters/iso-accuracy-standards.html</a></p><p></p><p>Note that 2 meters on the same drop of blood can vary by twice the allowed error since you must assume worst case of one at max high and the other is at min low. so at hypo levels they can be 1.66 mmol/l different (UK). One of those meters is not meeting the ISO standard, but unfortuntely you cannot tell which one is wrong, Comparing the newcomer against the others in your posession will confirm a consensus but again is not proof if they are from a common supplier or model.</p><p></p><p>If the trend is consistent, then you can usually make allowance for that. In the case of hypo's it makes sense that the lowest one wins regardless.</p><p></p><p>I have been double metering for several years now since it allows me to detect misreads and bum samples, I assume you retested to confirm the offset error was endemic.</p><p></p><p>My SD Codefree was consitently 1.6 mmol/l higher than any other meter I compared against, and my new Navii from the same supplier is currently running 0,8 mmo;/l higher than my Caresense..</p></blockquote><p></p>
[QUOTE="Oldvatr, post: 2504068, member: 196898"] The meters should meet the requirements of the ISO standard 2013 [URL]https://www.diabetes.co.uk/blood-glucose-meters/iso-accuracy-standards.html[/URL] Note that 2 meters on the same drop of blood can vary by twice the allowed error since you must assume worst case of one at max high and the other is at min low. so at hypo levels they can be 1.66 mmol/l different (UK). One of those meters is not meeting the ISO standard, but unfortuntely you cannot tell which one is wrong, Comparing the newcomer against the others in your posession will confirm a consensus but again is not proof if they are from a common supplier or model. If the trend is consistent, then you can usually make allowance for that. In the case of hypo's it makes sense that the lowest one wins regardless. I have been double metering for several years now since it allows me to detect misreads and bum samples, I assume you retested to confirm the offset error was endemic. My SD Codefree was consitently 1.6 mmol/l higher than any other meter I compared against, and my new Navii from the same supplier is currently running 0,8 mmo;/l higher than my Caresense.. [/QUOTE]
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