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Medical Forum / Diseases and Disorders / Diabetes / March 2007One touch strips coding
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? Harold >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? > >Harold 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. > On Mon, 26 Mar 2007 19:30:38 GMT, har...@slac.stanford.edu (Harold M. > [quoted text clipped - 3 lines] > >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 [quoted text clipped - 9 lines] > 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. >My body gets nonlinear >outside the target range anyway, so who am I to complain about the >strips being nonlinear? :-). Heh : ) Nicky. T2 dx 05/04 + underactive thyroid D&E, 100ug thyroxine Last A1c 5.5% BMI 25 |
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