Different readings from different meters?

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

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.

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/n...diagnosed.html

"louise" <louise@invalid.invalid> wrote in message
news:6g1fs1FcptmcU1@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.

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

On 2008-08-08, Tiger_Lily <me@privacy.net> 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
>

Used my twice today. 1 hr 20 min after lunch with 118 reading & 76g carbs;
1 hr after dinner reading of 108 with meal having 85g carb.

I do hope the One Touch Ultra 2 is fairly accurate but will see what numbers
a week will come up with as it doesn't appear to be consistent with the
low carb theory as something else must be going on.

It all could be pilot error as this is my 1st use of a meter even at the
sissy 2 or 3 setting of the lancet device.

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
>
sorry, typo......... Ultra 2 meter as #3 in the Sept issue

--
kate
type 1 since 1987
www.diabetic-chat.org
www.diabetic-talk.org
http://www.diabetes-support.org.uk/n...diagnosed.html

nobody wrote:
> On 2008-08-08, Tiger_Lily <me@privacy.net> 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
>>
>
> Used my twice today. 1 hr 20 min after lunch with 118 reading & 76g carbs;
> 1 hr after dinner reading of 108 with meal having 85g carb.
>
> I do hope the One Touch Ultra 2 is fairly accurate but will see what numbers
> a week will come up with as it doesn't appear to be consistent with the
> low carb theory as something else must be going on.
>
> It all could be pilot error as this is my 1st use of a meter even at the
> sissy 2 or 3 setting of the lancet device.

many meters come with a "control solution" - or you can ask
the manufacturer for it. This will allow you to test the
readings to see whether they are accurate (+/- 20% apparently).

Louise

Tiger_Lily wrote:
> 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
>>
> sorry, typo......... Ultra 2 meter as #3 in the Sept issue
>
What were #s 1 and 2?

Louise

On Thu, 07 Aug 2008 19:47:13 -0400, louise
<louise@invalid.invalid> wrote:

>
>What do I make of this? Are these meter readings only true
>when you're using the same meter?

Gretchen Becker says it better than I do.
http://www.healthcentral.com/diabete...rate-lab-tests

"What is important in many of these tests is trends. If your
A1c bounces around between 5.8 and 6.2, you can assume your
true A1c is probably around 6. But if you have levels of
5.6, then 5.8, then 5.9, and then 6.2, it's unlikely that
lab errors would show such a definite trend, and your
control is most likely worsening.


So don't sweat the small changes in lab results. Look for
trends. Then try to figure out how you can make the trends
go in the direction you want them to go. With the A1c that
means going down."

In the body you'll see she has the same attitude to meter
readings. So do I.


Cheers, Alan, T2, Australia.
--
Everything in Moderation - Except Laughter.
Blog http://loraldiabetes.blogspot.com
DLife column http://tinyurl.com/5v74xr
http://loraltravel.blogspot.com (The Taj Mahal)

louise <louise@invalid.invalid> 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.

Which country are you in? In the UK & Canada for example these kinds
of differences can occur due to the confusion over whole blood and
plasma calibration of meters, makes a standard difference of around
12% in readings.

--
Chris Malcolm cam@infirmatics.ed.ac.uk DoD #205
IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK
[http://www.dai.ed.ac.uk/homes/cam/]

On Thu, 07 Aug 2008 19:20:51 -0600, 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

I'll look that up. I do hope it is better than their previous reviews.
I've never seen them do anything about accuracy. They focus only on 'ease
of use', 'size of sample' and other 'features' one can easily find online.

On 2008-08-08, louise <louise@invalid.invalid> wrote:
> nobody wrote:
>> On 2008-08-08, Tiger_Lily <me@privacy.net> wrote:
>>
..............................
>> Used my twice today. 1 hr 20 min after lunch with 118 reading & 76g carbs;
>> 1 hr after dinner reading of 108 with meal having 85g carb.
>>
>> I do hope the One Touch Ultra 2 is fairly accurate but will see what numbers
>> a week will come up with as it doesn't appear to be consistent with the
>> low carb theory as something else must be going on.
>>
>> It all could be pilot error as this is my 1st use of a meter even at the
>> sissy 2 or 3 setting of the lancet device.
>
> many meters come with a "control solution" - or you can ask
> the manufacturer for it. This will allow you to test the
> readings to see whether they are accurate (+/- 20% apparently).
>
> Louise

I did use the control solution but may have messed it up. Read, but didn't
appreciate that I was supposed to place the solution at the EDGE of the
strip instead of on the top of the strip; finally smeared the solution
onto the edge & the meter counted down & displayed "138" which look like
the same number in the manual.

Will redo the control later as will be going to a 'diabetes & nutrition'
class in 1 hr.

louise wrote:
> Tiger_Lily wrote:
>> 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
>>>
>> sorry, typo......... Ultra 2 meter as #3 in the Sept issue
>>
> What were #s 1 and 2?
>
> Louise
the One Touch Ultra Mini was #1

i don't remember what #2 was, as it's not a meter i use

the One Touch Ultra 2 was #3

--
kate
type 1 since 1987
www.diabetic-chat.org
www.diabetic-talk.org
http://www.diabetes-support.org.uk/n...diagnosed.html

Chris Malcolm wrote:
> louise <louise@invalid.invalid> 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.
>
> Which country are you in? In the UK & Canada for example these kinds
> of differences can occur due to the confusion over whole blood and
> plasma calibration of meters, makes a standard difference of around
> 12% in readings.
>
In the US

Louise

I bought the Ames meter ages ago Before that we use strip that you
matched against a color bar on the bottle. The Ames meter was used by
putting blood a strip. wiping it off after a certain time and putting
it into the meter to get a reading.

For me the present meters are a miracle.

Back the we found diabetes by putting a TesTape in the urine flow and
if glucose was present it turned from yellow toward black. Glucose
is dumped in the 140 to 160 range. That was how many diabetics
were found.

Today, I am not concerned by small meter variations. I am concerned
about the principles and an audit on the meter. The best one I use is
a second meter and a few saved strips from a proven lot.

Try taking reading from different parts of your body and see the
differences.

Will Bill needs to post about his old days and boiling solutions.

The David Mendose site is a must read.

www.mendosa.com


On Fri, 08 Aug 2008 16:26:31 -0400, louise <louise@invalid.invalid>
wrote:

>Chris Malcolm wrote:
>> louise <louise@invalid.invalid> 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.
>>
>> Which country are you in? In the UK & Canada for example these kinds
>> of differences can occur due to the confusion over whole blood and
>> plasma calibration of meters, makes a standard difference of around
>> 12% in readings.
>>
>In the US
>
>Louise


----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet News==----
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<guys@consolidated.net> wrote in message
news:rpbp94tg26kesc07aulnt2lc4kard3b7ac@4ax.com...
>
> I bought the Ames meter ages ago Before that we use strip that you
> matched against a color bar on the bottle. The Ames meter was used by
> putting blood a strip. wiping it off after a certain time and putting
> it into the meter to get a reading.
>
> For me the present meters are a miracle.
>
> Back the we found diabetes by putting a TesTape in the urine flow and
> if glucose was present it turned from yellow toward black. Glucose
> is dumped in the 140 to 160 range. That was how many diabetics
> were found.
>
I must be older that you. The first tests I remember was tablets you put in
a test tube and added urine. It would fizz and get steaming hot. You
compared the color to a chart after the time was up. Those were the days...





> Today, I am not concerned by small meter variations. I am concerned
> about the principles and an audit on the meter. The best one I use is
> a second meter and a few saved strips from a proven lot.
>
> Try taking reading from different parts of your body and see the
> differences.
>
> Will Bill needs to post about his old days and boiling solutions.
>
> The David Mendose site is a must read.
>
> www.mendosa.com
>
>
> On Fri, 08 Aug 2008 16:26:31 -0400, louise <louise@invalid.invalid>
> wrote:
>
>>Chris Malcolm wrote:
>>> louise <louise@invalid.invalid> 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.
>>>
>>> Which country are you in? In the UK & Canada for example these kinds
>>> of differences can occur due to the confusion over whole blood and
>>> plasma calibration of meters, makes a standard difference of around
>>> 12% in readings.
>>>
>>In the US
>>
>>Louise
>
>
> ----== Posted via Pronews.Com - Unlimited-Unrestricted-Secure Usenet
> News==----
> http://www.pronews.com The #1 Newsgroup Service in the World! >100,000
> Newsgroups
> ---= - Total Privacy via Encryption =---

On Fri, 8 Aug 2008 14:19:40 -0700, "anon aka" <anonakaanon@gmail.com>
wrote:

>
><guys@consolidated.net> wrote in message
>news:rpbp94tg26kesc07aulnt2lc4kard3b7ac@4ax.com.. .
>>
>> I bought the Ames meter ages ago Before that we use strip that you
>> matched against a color bar on the bottle. The Ames meter was used by
>> putting blood a strip. wiping it off after a certain time and putting
>> it into the meter to get a reading.
>>
>> For me the present meters are a miracle.
>>
>> Back the we found diabetes by putting a TesTape in the urine flow and
>> if glucose was present it turned from yellow toward black. Glucose
>> is dumped in the 140 to 160 range. That was how many diabetics
>> were found.
>>
>I must be older that you. The first tests I remember was tablets you put in
>a test tube and added urine. It would fizz and get steaming hot. You
>compared the color to a chart after the time was up. Those were the days...
>
>

Those were same ones I started with.

You could actually get burn blister if you touched those test tubes
while the reaction was taking place.

--
Måck©® Deltec CoZmore Pumper
Type 1 since 1975
http://www.alt-support-diabetes.org
http://www.diabetic-talk.org
http://www.insulin-pumpers.org
http://diabetes.niddk.nih.gov/dm/pubs/type1and2/
http://www.pandora.com enter "Jason & Demarco"
http://www.ratbags.com/dechunging/


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....Bilbo Baggins


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..

On Thu, 07 Aug 2008 19:47:13 -0400, louise <louise@invalid.invalid>
wrote:

>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?

Gold standard would be to take both meters next time you get your
bloods drawn and compare them to the lab result.

"Trinkwasser" <spam@devnull.com.invalid> wrote in message
news:cfpr94pp5vqvpa9rvk87tetr2qlhkdva0g@4ax.com...
> On Thu, 07 Aug 2008 19:47:13 -0400, louise <louise@invalid.invalid>
> wrote:
>
>>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?
>
> Gold standard would be to take both meters next time you get your
> bloods drawn and compare them to the lab result.

Recently, I've noticed that using strips from different vials tends to
affect my readings up to 10%. Were the strips matching the different
brands of meters, and therefore almost certainly from different vials?

Robert Miles wrote:

> Recently, I've noticed that using strips from different vials tends to
> affect my readings up to 10%. Were the strips matching the different
> brands of meters, and therefore almost certainly from different vials?

interesting

when i change meters, i test with BOTH meters for 100 strips to check
the new meter

i've never seen a variance of more than 1 pt (18 US)...........typically
far less

--
kate
type 1 since 1987
www.diabetic-chat.org
www.diabetic-talk.org
http://www.diabetes-support.org.uk/n...diagnosed.html

Using this thread for an allied question.

Would a US person please advise me on whether all meters in
the US are plasma or whole blood calibrated or are both
calibration options sold in the US?

If both, do various brands of meter stick to either plasma
or whole blood?

In checking the Roche and One-touch sites, they seem to be
whole blood, which surprised me, because I was under the
mis-apprehension that only plasma was used in the US.


Cheers, Alan, T2, Australia.
--
Everything in Moderation - Except Laughter.
Blog http://loraldiabetes.blogspot.com
DLife column http://tinyurl.com/5v74xr
http://loraltravel.blogspot.com (The Taj Mahal)

On Sun, 10 Aug 2008 07:48:58 +1000, Alan S
<loralgtweightandcarbs@gmail.com> wrote:

>Using this thread for an allied question.
>
>Would a US person please advise me on whether all meters in
>the US are plasma or whole blood calibrated or are both
>calibration options sold in the US?
>
>If both, do various brands of meter stick to either plasma
>or whole blood?
>
>In checking the Roche and One-touch sites, they seem to be
>whole blood, which surprised me, because I was under the
>mis-apprehension that only plasma was used in the US.
>
>
>Cheers, Alan, T2, Australia.


All meters read what we put in them --Whole blood. We
calibrate them to make the output of the meter and display a number
which the makers selects Most meters I have used can be set to
either display number.

IN the docs lab they remove a lot of items from the sample and read
the plasma.

At first there was a lot of confusion over the two different numbers.

THAT SHOULD not have happened.

Read the literature on the meter or call the phone number on your
meter and ask the company representative.

I think the difference is in the 18% range.

Have you ever looked at David Mendosa's site.

www.mendosa.com



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<guys@consolidated.net> wrote in message
news:qh5s945qvfsnhp6m78i97ph8c963k9aeht@4ax.com...
> On Sun, 10 Aug 2008 07:48:58 +1000, Alan S
> <loralgtweightandcarbs@gmail.com> wrote:
>
>>Using this thread for an allied question.
>>
>>Would a US person please advise me on whether all meters in
>>the US are plasma or whole blood calibrated or are both
>>calibration options sold in the US?
>>
>>If both, do various brands of meter stick to either plasma
>>or whole blood?
>>
>>In checking the Roche and One-touch sites, they seem to be
>>whole blood, which surprised me, because I was under the
>>mis-apprehension that only plasma was used in the US.
>>
>>
>>Cheers, Alan, T2, Australia.
>
>
> All meters read what we put in them --Whole blood. We
> calibrate them to make the output of the meter and display a number
> which the makers selects Most meters I have used can be set to
> either display number.
>
> IN the docs lab they remove a lot of items from the sample and read
> the plasma.
>
> At first there was a lot of confusion over the two different numbers.
>
> THAT SHOULD not have happened.
>
> Read the literature on the meter or call the phone number on your
> meter and ask the company representative.
>
> I think the difference is in the 18% range.
>
> Have you ever looked at David Mendosa's site.
>
> www.mendosa.com
>

Almost all meters sold today translate the result into plasma measurement
numbers, one exception is the One Touch Basic which displays whole blood
numbers.
http://www.hocks.com/metercompare.htm

Alan S wrote:
> Using this thread for an allied question.
>
> Would a US person please advise me on whether all meters in
> the US are plasma or whole blood calibrated or are both
> calibration options sold in the US?
>
> If both, do various brands of meter stick to either plasma
> or whole blood?
>
> In checking the Roche and One-touch sites, they seem to be
> whole blood, which surprised me, because I was under the
> mis-apprehension that only plasma was used in the US.
>
>
> Cheers, Alan, T2, Australia.
> --
> Everything in Moderation - Except Laughter.
> Blog http://loraldiabetes.blogspot.com
> DLife column http://tinyurl.com/5v74xr
> http://loraltravel.blogspot.com (The Taj Mahal)

as far as the One Touch strips are concerned, they read your whole blood
and give you a 'plasma equivalent'

play on words..... check closer and see if the meter/strips give 'plasma
equivalent'

--
kate
type 1 since 1987
www.diabetic-chat.org
www.diabetic-talk.org
http://www.diabetes-support.org.uk/n...diagnosed.html

On Sat, 09 Aug 2008 17:29:31 -0500, guys@consolidated.net
wrote:

>Read the literature on the meter or call the phone number on your
>meter and ask the company representative.

Difficult for me mate, because my meter reads mmol/l in
Australia. There is no mention in the meter information, or
the tests strip insert, of plasma or whole blood.


Cheers, Alan, T2, Australia.
--
Everything in Moderation - Except Laughter.
Blog http://loraldiabetes.blogspot.com
DLife column http://tinyurl.com/5v74xr
http://loraltravel.blogspot.com (The Taj Mahal)

On Sat, 09 Aug 2008 17:00:02 -0600, Tiger_Lily
<me@privacy.net> wrote:

>as far as the One Touch strips are concerned, they read your whole blood
>and give you a 'plasma equivalent'
>
>play on words..... check closer and see if the meter/strips give 'plasma
>equivalent'

My question relates to this thread on the ADA forum:
http://community.diabetes.org/n/pfx/...s&msg=25736.21


Cheers, Alan, T2, Australia.
--
Everything in Moderation - Except Laughter.
Blog http://loraldiabetes.blogspot.com
DLife column http://tinyurl.com/5v74xr
http://loraltravel.blogspot.com (The Taj Mahal)

Alan S wrote:
> On Sat, 09 Aug 2008 17:00:02 -0600, Tiger_Lily
> <me@privacy.net> wrote:
>
>> as far as the One Touch strips are concerned, they read your whole blood
>> and give you a 'plasma equivalent'
>>
>> play on words..... check closer and see if the meter/strips give 'plasma
>> equivalent'
>
> My question relates to this thread on the ADA forum:
> http://community.diabetes.org/n/pfx/...s&msg=25736.21
>
>
> Cheers, Alan, T2, Australia.
> --
> Everything in Moderation - Except Laughter.
> Blog http://loraldiabetes.blogspot.com
> DLife column http://tinyurl.com/5v74xr
> http://loraltravel.blogspot.com (The Taj Mahal)

http://www.lifescan.com/company/contact/faq/products

Comparing the results
OneTouch® II, OneTouch® Basic®, and OneTouch® Profile® Meters are whole
blood-calibrated meters. To compare a lab result with a whole
blood-calibrated meter, you must first convert the lab result into its
whole blood equivalent by dividing the result by 1.12. If your lab
result is 112, you divide 112 by 1.12 which equals 100. In this example,
the number 100 represents the "whole blood" equivalent of the lab's
"plasma" glucose value. You would then compare your meter's whole blood
result to 100. If your meter's result fell between 80 and 120 (+ 20%),
it would be considered accurate. Try our Test Result Converter for an
easy conversion between "plasma" and "whole blood" results.

OneTouch® Ultra®2, OneTouch® UltraSmart®, OneTouch® UltraMini™,
OneTouch® Ultra®, OneTouch® FastTake®, and OneTouch® SureStep® Meters
are plasma-calibrated meters. To compare a lab result with a
plasma-calibrated meter, no conversion is necessary. However, the +20%
range still applies. If your lab or "plasma" result is 100, your
plasma-calibrated meter would be accurate if it gave you a result
anywhere between 80 and 120.

i took the liberty of posting to the forum

--
kate
type 1 since 1987
www.diabetic-chat.org
www.diabetic-talk.org
http://www.diabetes-support.org.uk/n...diagnosed.html

On Sat, 09 Aug 2008 15:44:53 -0600, Tiger_Lily <me@privacy.net>
wrote:

>when i change meters, i test with BOTH meters for 100 strips to check
>the new meter
>
>i've never seen a variance of more than 1 pt (18 US)...........typically
>far less

That may depend on the age of the two meters. My old Glucotrend
meter was recently replaced by an Optium Xceed meter. The
Optium read between 45% and 47% higher than the older Glucotrend.

I had been using the Glucotrend since my diagnosis as a diabetic
type 2 back in 1997. Because of the large difference I had the
Optium tested using the control samples and in each case the
meter read the correct range. The problem with this test is
that there is not a specific reading for the sample - just a
range. I forget the actual ranges for the test samples but they
were of the order of 3 - 6 and 7 - 9 mmol/l.

I would have preferred that the samples had a fixed value such as
4.7 and 7.8 mmol/L which would also give a % accuracy for the
meter. Why don't the meter companies do this?
--

Cheers . . . JC

JC wrote:
> On Sat, 09 Aug 2008 15:44:53 -0600, Tiger_Lily <me@privacy.net>
> wrote:
>
>> when i change meters, i test with BOTH meters for 100 strips to check
>> the new meter
>>
>> i've never seen a variance of more than 1 pt (18 US)...........typically
>> far less
>
> That may depend on the age of the two meters. My old Glucotrend
> meter was recently replaced by an Optium Xceed meter. The
> Optium read between 45% and 47% higher than the older Glucotrend.
>
> I had been using the Glucotrend since my diagnosis as a diabetic
> type 2 back in 1997. Because of the large difference I had the
> Optium tested using the control samples and in each case the
> meter read the correct range. The problem with this test is
> that there is not a specific reading for the sample - just a
> range. I forget the actual ranges for the test samples but they
> were of the order of 3 - 6 and 7 - 9 mmol/l.
>
> I would have preferred that the samples had a fixed value such as
> 4.7 and 7.8 mmol/L which would also give a % accuracy for the
> meter. Why don't the meter companies do this?

wow!!!!!!!!!!!!!!!!

even when i switched from the One Touch Profile (whole blood testing) to
the One Touch Ultra, i never saw a difference of THAT magnitude!

NO more than 1 pt difference...... most often lower than that

--
kate
type 1 since 1987
www.diabetic-chat.org
www.diabetic-talk.org
http://www.diabetes-support.org.uk/n...diagnosed.html