Re: One touch strips coding

On Mar 26, 3:50 pm, matt weber <matth...@xxxxxxxxx> wrote:
On Mon, 26 Mar 2007 19:30:38 GMT, har...@xxxxxxxxxxxxxxxxx (Harold M.

Harvey Sr.) wrote:
I ran out of strips and had to use a different batch. I took a reading
before i realized they were not the same batch. The reading was 125. I
changed the coding from batch 15 to batch 16 and the reading was the same. Is
this a normal reading that the batches are that close?

I played around a bit with a meter of mine that required coding
several years ago (a Medisense QED meter) and found that putting in
the wrong calibration strip usually resulted in a change less than 10
mg/dl.

Since we don't know exactly what the differences are, they could be in
sensitivity, so that 125 in one batch is 110 or 140 in another without
the correction.

It call also be linearity, so that both batches read about the same at
125, at 70 one might read 80, and the other 70, or 200 versus 180

Remember that most strips are supposed to be reasonable accurate from
about 1.1mmol or 20mg/dl all the way up to 28mmol or 500mg/dl,

So just because there isn't much difference in the 100-125 range is no
assurance that there aren't large differences in the extremes at one
or both ends.

In my limited (25 year) experience, if I'm outside a rather narrow
"target" range (say 70-140) then I care more about whether I'm "high"
or "low", and not so much the exact number. My body gets nonlinear
outside the target range anyway, so who am I to complain about the
strips being nonlinear? :-).

Tim.

.

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