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Concerns about SD Codefree
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<blockquote data-quote="Squire Fulwood" data-source="post: 275914" data-attributes="member: 44622"><p>I bought an SD codefree meter some weeks ago. The reason was that since the NHS wish to ration my use of my Freestyle Lite I was looking for an alternative device with cheaper test strips so that I could be independent and not go broke at the same time.</p><p>Straight away I noticed that the SD was reading high. Actually the first time I compared it to the Freestyle it read 12.4 with a 6.2 for the Freestyle. One of them does not read in mmol/l was the conclusion I came to. I looked at the Zurich University research and they say the Freestyle reads about 10% slow but they also say that the SD reads slow also but not quite so much.</p><p>I was not happy with the SD since I have to discuss the results with my nurse and this would be like talking in Farenheit while she was talking in Centigrade.</p><p>I came up with the idea of a conversion factor. If I could find out how ambitious the SD was then I could multiply the result by that factor to align the readings with the Freestyle and the nurse. To this end I took a series of readings with both meters and in each test I used the same blood sample whether it was artificial or real.</p><p>So far I have determined that the SD meter always reads higher than the Freestyle. Unfortunately it reads 10% higher at very low readings, 25% higher for low/middle readings, 10% again for high/middle readings and anything up to 30% for very high readings. On one occasion using artificial blood the Freestyle read 13 and the SD 20. </p><p>I have concluded that I cannot use the SD meter and get readings that are of use to me or the nurse.</p></blockquote><p></p>
[QUOTE="Squire Fulwood, post: 275914, member: 44622"] I bought an SD codefree meter some weeks ago. The reason was that since the NHS wish to ration my use of my Freestyle Lite I was looking for an alternative device with cheaper test strips so that I could be independent and not go broke at the same time. Straight away I noticed that the SD was reading high. Actually the first time I compared it to the Freestyle it read 12.4 with a 6.2 for the Freestyle. One of them does not read in mmol/l was the conclusion I came to. I looked at the Zurich University research and they say the Freestyle reads about 10% slow but they also say that the SD reads slow also but not quite so much. I was not happy with the SD since I have to discuss the results with my nurse and this would be like talking in Farenheit while she was talking in Centigrade. I came up with the idea of a conversion factor. If I could find out how ambitious the SD was then I could multiply the result by that factor to align the readings with the Freestyle and the nurse. To this end I took a series of readings with both meters and in each test I used the same blood sample whether it was artificial or real. So far I have determined that the SD meter always reads higher than the Freestyle. Unfortunately it reads 10% higher at very low readings, 25% higher for low/middle readings, 10% again for high/middle readings and anything up to 30% for very high readings. On one occasion using artificial blood the Freestyle read 13 and the SD 20. I have concluded that I cannot use the SD meter and get readings that are of use to me or the nurse. [/QUOTE]
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