Different readings from different meters?
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From: louise on 7 Aug 2008 19:47 Through a long series of events, I now own an AccuChek Versa and a FreeStyle Freedom Lite. Accucheck sent it overnight free when I called to ask about the difference between the softclix and the multi-clix and explained I planned to use the pen with a Freestyle meter :-) The Accuchek came with control solution, the FreeStyle did not. I've now checked both meters twice, no more than one minute apart, and my readings are different by 12 points. The Accuchek gave me 135 one hour after a meal and the Freestyle gave me 123. Before the meal the Accuchek gave me 99 and the FreeStyle gave me 112. What do I make of this? Are these meter readings only true when you're using the same meter? BTW, I did use the control solution on the accuchek and it came out within range. Thanks Louise
From: ray on 7 Aug 2008 20:20 On Thu, 07 Aug 2008 19:47:13 -0400, louise wrote: > Through a long series of events, I now own an AccuChek Versa and a > FreeStyle Freedom Lite. Accucheck sent it overnight free when I called > to ask about the difference between the softclix and the multi-clix and > explained I planned to use the pen with a Freestyle meter :-) > > The Accuchek came with control solution, the FreeStyle did not. > > I've now checked both meters twice, no more than one minute apart, and > my readings are different by 12 points. > > The Accuchek gave me 135 one hour after a meal and the Freestyle gave me > 123. Assuming the 'real' result should be somewhere in between, that's a difference of about 10%. > > Before the meal the Accuchek gave me 99 and the FreeStyle gave me 112. That is also around 10% difference. > > What do I make of this? Are these meter readings only true when you're > using the same meter? > > BTW, I did use the control solution on the accuchek and it came out > within range. > > Thanks > > Louise The FDA requires that meters be accurate to +-20%. I expect that if you check the numbers on the control solution, you'll see that it represents about +-15% - i.e. a spread of 30%. Your numbers are well within that range. There is no reason to believe that either is in error beyond the quoted ranges.
From: Tiger_Lily on 7 Aug 2008 21:20 louise wrote: > Through a long series of events, I now own an AccuChek Versa and a > FreeStyle Freedom Lite. Accucheck sent it overnight free when I called > to ask about the difference between the softclix and the multi-clix and > explained I planned to use the pen with a Freestyle meter :-) > > The Accuchek came with control solution, the FreeStyle did not. > > I've now checked both meters twice, no more than one minute apart, and > my readings are different by 12 points. > > The Accuchek gave me 135 one hour after a meal and the Freestyle gave me > 123. > > Before the meal the Accuchek gave me 99 and the FreeStyle gave me 112. > > What do I make of this? Are these meter readings only true when you're > using the same meter? > > BTW, I did use the control solution on the accuchek and it came out > within range. > > Thanks > > Louise all of those readings are close enough to be called 'the same' meter error is allowed to be 20% by the FDA, however most meters are much better Consumer's Digest rates the One Touch Mini meter and #1 and the One Touch Ultra 2 meter as #2 in the Sept issue -- kate type 1 since 1987 www.diabetic-chat.org www.diabetic-talk.org http://www.diabetes-support.org.uk/newly%20diagnosed.html
From: Robert Miles on 7 Aug 2008 21:38 "louise" <louise(a)invalid.invalid> wrote in message news:6g1fs1FcptmcU1(a)mid.individual.net... > Through a long series of events, I now own an AccuChek Versa and a > FreeStyle Freedom Lite. Accucheck sent it overnight free when I called to > ask about the difference between the softclix and the multi-clix and > explained I planned to use the pen with a Freestyle meter :-) > > The Accuchek came with control solution, the FreeStyle did not. > > I've now checked both meters twice, no more than one minute apart, and my > readings are different by 12 points. > > The Accuchek gave me 135 one hour after a meal and the Freestyle gave me > 123. > > Before the meal the Accuchek gave me 99 and the FreeStyle gave me 112. > > What do I make of this? Are these meter readings only true when you're > using the same meter? > > BTW, I did use the control solution on the accuchek and it came out within > range. > > Thanks > > Louise I've seen my fasting blood glucose (FBG) readings vary by to to 10 points (US measurement) just by going from one vial of test strips to another, even when staying with the same meter.
From: % on 7 Aug 2008 21:46
Tiger_Lily wrote: > louise wrote: >> Through a long series of events, I now own an AccuChek Versa and a >> FreeStyle Freedom Lite. Accucheck sent it overnight free when I >> called to ask about the difference between the softclix and the >> multi-clix and explained I planned to use the pen with a Freestyle >> meter :-) >> >> The Accuchek came with control solution, the FreeStyle did not. >> >> I've now checked both meters twice, no more than one minute apart, >> and my readings are different by 12 points. >> >> The Accuchek gave me 135 one hour after a meal and the Freestyle >> gave me 123. >> >> Before the meal the Accuchek gave me 99 and the FreeStyle gave me >> 112. >> >> What do I make of this? Are these meter readings only true when >> you're using the same meter? >> >> BTW, I did use the control solution on the accuchek and it came out >> within range. >> >> Thanks >> >> Louise > all of those readings are close enough to be called 'the same' > > meter error is allowed to be 20% by the FDA, however most meters are > much better > > Consumer's Digest rates the One Touch Mini meter and #1 and the One > Touch Ultra 2 meter as #2 in the Sept issue hi |