By edvel54 Latest Reply 2011-07-25 22:30:28 -0500
Started 2011-07-21 14:01:42 -0500

I was researching an answer for a question by mewElla about different readings from different hands and came upon an article about it. I learned something new.

There is a difference between the SIDES of the finger and the PADS of the fingers, but not a serious difference between fingers. There IS a difference between, say, your finger tips and your forearm. Some meters will account for this, most older meters do not.

ALSO, you are instructed to NEVER use the first drop of blood from you finger. Always squeeze one drop, wipe it off, then use the SECOND drop. The first drop, being "closer" to the surface, has most of the sugar used up. The SECOND drop, being from the vein, had a more accurate reading.

HOWEVER, there is also a normal, expected difference of about 20 points between each individual test strip! That is, if you were to take a reading, of say 95 with one test strip, then immediately do another second reading, using blood from the same wound, on a second test strip, the second reading might be anywhere between 75 and 115.

12 replies

camerashy 2011-07-21 16:38:54 -0500 Report

I was told to use the sides of my fingers. Am I getting readings higher or lower? And I always wash my hands first.

GabbyPA 2011-07-25 19:59:19 -0500 Report

I imagine that the difference is not that much. I would say if you want to find out, you can test it yourself and see. I have done that in the past when I was trying to see if a different finger would give me a different reading.

aneibe43 2011-07-24 19:59:55 -0500 Report

i like that question. i'd like to know the answer too.

edvel54 2011-07-25 22:30:28 -0500 Report

I found that my pads test higher than the sides. I was looking for the answer, but really didn't find what I was looking for, but I did find this:

Always try to avoid pricking the finger on the pad where the most nerve endings reside. This not only induces unnecessary pain but is also not the best "bleed" site on the finger.

Prick fingers on the sides, a little bit away from the nail (too close to the nail hurts!). This is where the most blood vessels are and the fewest nerve endings. Smaller fingers bleed better than larger, the thumb often has the thickest skin. Using all the fingers and thumb are fine, but you may need to adjust the depth setting for fingers with calluses or thicker skin.

Forearms are not a reliable test site, they will register blood glucose higher than fingertips.

MewElla 2011-07-21 14:05:13 -0500 Report

Very interesting…never heard this…Appreciate you checking this one and sharing with us…

GabbyPA 2011-07-21 14:04:10 -0500 Report

I did not realize that our sides and pads were different. I did know not to use the first drop, but you explained why and I appreciate that. Thanks.