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Why Do You Get Different Blood Sugar Readings On Different Fingers

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Finger Sticking Techniques

(This article appeared in the Voice of the Diabetic, Volume 16, Number 2, Spring 2001 Edition, published by the Diabetes Action Network of the National Federation of the Blind. Updated July 2004) We know blood glucose monitoring is important because it helps us keep our diabetes under control. You should test often. How you test matters too, as poor technique wastes strips and can give you inaccurate readings. Good testing techniques will also minimize the number of times we must stick our fingers. If you have not achieved good finger-sticking techniques, I recommend the old adage, Practice makes perfect. I am a type 1 diabetic, and I empathize with individuals whose fingertips are bruised and sore from testing, and with others who have trouble getting enough blood from the puncture site. Test strips are extremely expensive, and it is frustrating for people who must stick themselves over and over while trying to get enough blood for a good reading. Finger Sticking Locations You should generally use the sides of your fingers for sticking sites. More nerves are present in the center of fingers, so lancing in this location may bring more pain. Note several glucose monitors now allow " Continue reading >>

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  1. kid_fears99

    I've noticed recently that my UltraSmart gives me different readings depending on which finger I test on. This may sound absurd, but my right ring finger always tests about 40-50 points below my left ring finger. For instance, last night before dinner I tested five times on five different fingers and got results ranging from 190 to 287. I always wash and completely dry my hands before I test, my meter is almost new, and this is not the first time this has happened. I usually take an average of the results and use that for my correction factor. Has this happened to anyone else?

  2. disgusted

    kid_fears99 said:

    I've noticed recently that my UltraSmart gives me different readings depending on which finger I test on. This may sound absurd, but my right ring finger always tests about 40-50 points below my left ring finger. For instance, last night before dinner I tested five times on five different fingers and got results ranging from 190 to 287. I always wash and completely dry my hands before I test, my meter is almost new, and this is not the first time this has happened. I usually take an average of the results and use that for my correction factor. Has this happened to anyone else?
    it's strange but I have had this happening several times noone could explain to me either. I even asked the doctor and she didn't know. Maybe its like when they check your blood pressure and both arms have different results. Do you hands/fingers feel like they asleep often? If so it might have to do with that. Am sorry am not of much help just wanted to say you are not the only one this has happened to. All the best to you

  3. JediSkipdogg

    You need to keep in mind that BG meters are allowed a 20% accuracy range. Read this for more info on an experiment I conducted. http://www.diabetesforums.com/monitoring/11696-blood-glucose-meter-comparison.html
    And all 4 of those tests were done with the same sample of blood...
    Also, remember, blood takes a while to circulate through all parts of the body. Therefore one finger may get it sooner than another. Heck, even on the same finger, a different vessel may get fresh blood 5 minutes sooner than another one.
    It's just something we have to live with for now until better technology comes along. Which at this time I don't see any.

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