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The Question
Fri Jun 08 10:35:41 UTC 2012

To Donna Yuscavage: Why is there a difference between blood sample from finger vs arm (arm = BG from 30min ago?) and where did you get this info?
Asked By: pavel  

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Frances Konieczny Pharm.D.
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Expert Answers (1)
2012-06-13 18:15:03.0

Hi. Good question. I got this answer from several meter reps who visited my office when the alternative site meters were approved. The reason I was given is that the circulation in the arm and hand areas are different. Surface (capillary) blood usually reaches the hands first because of gravity. To get an equivalent finger reading in the arm, I was instructed that you need to rub the skin in the area you want to stick until the surface area reddens. If you do this, the readings should be equivalent. None of the companies recommend using the arm sites to check for or during treatment of low blood sugar and this is the reason. Thank you for the question. If you have further questions, please contact me at dLife again. Thanks for the question.
Answered By: Donna Yuscavage
Accreditations: RN, BSN, CDE
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