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I have 3 identical glucose monitors. I keep one at home, one at work, and one in the car. Yesterday I decided to test with all 3 to see how closely they would read. Within less than a minute, the first said 167, the second said 79, and the third was 109. This was after testing all 3, each with the test fluid that came in the box with it. How are you supposed to know which (or if) one is right?


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replied August 3rd, 2010
Diabetes Answer A14907
Hi,
Welcome to the forum. I am really glad to help you out. I completely agree with the dilemma you must be in. A variation of up to 10 is expected amongst various glucometers but such wide variation is not expected at all. It is very difficult for me to comment which one is the right reading. The best way to do the same is to corroborate with a reading of the lab.

The same blood sample with which the lab personnel measures the glucose should be used to measure by using the glucometer. In this way, one can know which lab reading is the closest to the glucometer and is thus the right one. I sincerely hope that helps. Take care.




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