susanK - 14120
By susanK - 14120 Latest Reply 2008-05-28 08:51:40 -0500
Started 2008-05-27 01:57:08 -0500

can someone please tell me if I should be concerned when 2 different meters show 2 different reading,sometimes 15-20 points apart, using the same prick. I'm type 2 and the A1c is satisfactory however in keeping track of my facting sugar I find the reading is all over the chart, so I'm using 2 meters periodially just monitor my situation

5 replies

tmana 2008-05-28 08:51:40 -0500 Report

I have been told that the accuracy of a measurement can change if you use two drops of blood from the same prick. One school says not to use the first drop, since that can be contaminated with sweat and surface dirt; the othe schools says that by the time you get to the second drop, the wound is drying up and you will get an inaccurate reading.

Best I can say is, compare both against labs, or compare the second and third drops of blood (if you can squeeze that many out!), or compare two nearby pricks on the forearm.

Elizabeth Sprague
Elizabeth Sprague 2008-05-27 08:59:04 -0500 Report

chose your meter that gives you the best reading more acurutly .like the one you know best longer. i like lifescan it is the best for me. and im tipe 2.

John Crowley
John Crowley 2008-05-27 05:44:59 -0500 Report

That is a great question. All meters have a margin of error, meaning that your results are within plus or minus a certain percentage (usually 10%).

So that means that if you test and get a reading of 100, your actual blood sugar is (most likely) between 90 and 110.

So testing twice in a row and/or with two different meters, you would expect some variability. 15 to 20 is probably at the high end but still within reason.

I hope that helps.

jupton1 2008-05-27 05:44:34 -0500 Report

I think You should,I would call the 1-800# of the meter You like best and tell them so they can check it..John