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Diabetes Q&A | Other | I took my glucose at 5.30 PM and i
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11/06/09 06:24 PM

"I took my glucose at 5.30 PM and it was 250, I knew in my heart that was wrong. So I retook it, and it was 85. Has this happened befor"
Asked By: bal  
Category: Other

Background Info Hide
When I was diagnosed, my A1C was high, and it proved I had a glucose number of 250 for 3 months. I felt bad, so I knew this wasnt right. Are machines defective? My numbers have been very good, because I am on Glipizide. They have not been over 180 since I started the Glipizide.

Expert Answers (1)

11/10/09 03:11 AM

You did the right thing by re-checking. The wrong dose of insulin may be administered based on a false reading. It is extremely important when checking a blood sugar that hands are clean. Food residue is often a culprit in falsely elevated readings. Most of the meter companies also caution against using antibacterial gels and lotions as the residue left behind from them may affect the reading as well. The best way to clean your hands is a soap and water wash. If that is not feasible, always carry alcohol wipes with you to clean off a fingertip before poking but be sure to let the alcohol dry first. As far as meter accuracy, up to a 20% variance between readings is considered acceptable. Be sure to test your meter's accuracy by using a fresh vial of control solution and comparing the result per the instruction manual, or call the customer support number on the back of the meter itself. Control solution is only fresh for 3 months once it has been opened. Always date the label when you break the seal. If you need a new vial, your pharmacy should be able to help you.
Answered By: Julie Lom
Accreditations: RN BSN CDE
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