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【科普】为什么不要对血糖仪进行比较
为什么不要对血糖仪进行比较
Ever try to check one meter against another by testing with both at the same time and seeing if their results match up? Ever wonder why they might not?
在同一个时候，用两种血糖仪检测，注意他们的结果是否一致，令人惊奇，结果为何不同
The answer lies in the FDA’s definition of what constitutes “accurate” for any one meter. A meter is considered accurate enough if it’s within 20 percent of the true value that a lab would provide. Home meters may be calibrated slightly low or high, depending on the manufacturer, to ensure consistent results. So, if your blood glucose is really 100, a meter that reads 80 is close enough for the FDA. Another meter that says 120 is also close enough. However, if you compare them to each other, they’re forty mg/dl apart. You might think that one of them is right, and one is wrong, but that’s not the case. They’re both (just barely) right enough.
美国食品药品管理局对任何一种仪表制定的“准确“定义是，一种仪表，如果达到实验室提供的实际值的20%，就认为准确。根据制造商，保证的稳定结果，校准家用仪表可略高或略低。如实际血糖为100，按照美国食品药品管理局的定义，一个测定结果为80，算相差不大。另一个，测定为120，也算相差不大。然而，用这两个血糖仪彼此相比，就是40毫克。你可能会认为有一个是正确的，另一个是错的。
但事实并非如此，两者都恰好是对的
The potential differences get bigger as your glucose goes higher. Suppose your real blood glucose level is 300, as confirmed by a lab test. The first meter, which leans toward the low side, might give you a value of 240. That’s within 20 percent of 300, so it’s technically accurate. The second meter, which leans toward the high side, might give you a value of 360. That’s also within 20 percent of 300, so it too is technically accurate. If you compared them to each other and saw the 120-mg/dl difference between the two, you might conclude, wrongly, that one is right and the other is way off the mark. But in fact, your true value is neither 240 nor 360–your true value is 300. And that’s why it’s fundamentally futile to compare meter to meter. If you’re worried about your meter’s accuracy, test it against lab values.
血糖偏高，潜在的差异较大。实验室确定的实际血糖为300，用第一个偏低的血糖仪测试，可能为240，也就是300的20%。，因此这算是技术上的准确。再用第二个偏高的测试，可能为360。那也是300的20%。也算是技术上的准确。如果就用这两个血糖仪彼此相比。相差为120毫克，结论可能是，有错。一个是正确，而另一个有偏差，不过，事实上，该结果既不是240，也不是360。真实结果还是300。那又
何必用两个仪表去比来比去呢？，毫无意义。如果担心血糖仪是否准确，最好去实验室测定
________________________________________ Ever try to check one meter against another by testing with both at the same time and seeing if their results match up? Ever wonder why they might not?
在同一个时候，用两种血糖仪检测，注意他们的结果是否一致，令人惊奇，结果为何不同。[标签:content1][标签:content2]
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作者:admin@医学,生命科学 2011-03-14 17:11
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