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Hi. Yes ANOTHER freestyle libre post. I was going to post in one of the others, but don´t think this has been specifically addressed yet.
So, re the calibration of the freestyle libre reader (and or other ways of monitoring the sensors). I have read on here that people say there is a 20 minute time lag, BUT on the Freestyle libre website itself they claim there is an approximate lag of 5 minutes and on another related post they claim a 2.4 minute time lag for adults:
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Interstitial fluid readings and blood glucose readings don’t always match
Glucose in the blood takes time to make its way into the interstitial fluid so there may be a lag time. The average lag time between the FreeStyle Libre 2 sensor and blood glucose readings is by about 2.1 minutes for children and about 2.4 minutes for adult
https://freestylediabetes.co.uk/freestyle-libre/flash-glucose-monitoring-temp
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And they quote some study (that´s also published on Pubmed amongst others)
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The average lag time of the FreeStyle Libre system is approximately 5 minutes. 3 This is why ISF glucose and blood glucose measurements taken at the same time won't always match - and in fact - are likely to be different. 1. Rebrin K, Steil GM. Can interstitial glucose assessment replace blood glucose measurements?
https://www.freestyle.abbott/ca/en/products/libre/faqs.html
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So ultimately. What´s the evidence and science behind the "20 minute" lag time and where did it come from? Which claim is correct? Can anyone post the reviewed evidence?
I´m sure we can all agree that there is a massive difference between the 2.4 minutes (2.1 for children) or 5 minutes as posted on the websites and the 20 minutes that is often quoted on here.
Have I missed something?
EDIT: Added the links as original posting flagged them as spam.
So, re the calibration of the freestyle libre reader (and or other ways of monitoring the sensors). I have read on here that people say there is a 20 minute time lag, BUT on the Freestyle libre website itself they claim there is an approximate lag of 5 minutes and on another related post they claim a 2.4 minute time lag for adults:
-----------------
Interstitial fluid readings and blood glucose readings don’t always match
Glucose in the blood takes time to make its way into the interstitial fluid so there may be a lag time. The average lag time between the FreeStyle Libre 2 sensor and blood glucose readings is by about 2.1 minutes for children and about 2.4 minutes for adult
https://freestylediabetes.co.uk/freestyle-libre/flash-glucose-monitoring-temp
--------------------
And they quote some study (that´s also published on Pubmed amongst others)
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- 8 Alva S, et al. Accuracy of a 14-Day Factory-Calibrated Continuous Glucose Monitoring System With Advanced Algorithm in Pediatric and Adult Population With Diabetes. Journal of Diabetes Science and Technology. September 2020. doi:10.1177/1932296820958754
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The average lag time of the FreeStyle Libre system is approximately 5 minutes. 3 This is why ISF glucose and blood glucose measurements taken at the same time won't always match - and in fact - are likely to be different. 1. Rebrin K, Steil GM. Can interstitial glucose assessment replace blood glucose measurements?
https://www.freestyle.abbott/ca/en/products/libre/faqs.html
---------------------
So ultimately. What´s the evidence and science behind the "20 minute" lag time and where did it come from? Which claim is correct? Can anyone post the reviewed evidence?
I´m sure we can all agree that there is a massive difference between the 2.4 minutes (2.1 for children) or 5 minutes as posted on the websites and the 20 minutes that is often quoted on here.
Have I missed something?
EDIT: Added the links as original posting flagged them as spam.
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