OGTT blood from vein or finger.. which is more accurate

Go Back   The Diabetes Forum Support Community For Diabetics Online > Diabetes Forum Community > Gestational Diabetes

Gestational Diabetes Gestational Diabetes can effect from 3-10% of all pregnancies. If you are pregnant and concerned about gestational Diabetes then please feel free to use this section of the forum to discuss Diabetes during your pregnancy. If you have any experience of Diabetes during pregnancy then please feel free to share your knowledge with other members here.


Like Tree3Likes
  • 2 Post By John.in.France
  • 1 Post By mbuster

OGTT blood from vein or finger.. which is more accurate


Closed Thread
 
Shared Thread Thread Tools
Old 08-23-2015, 10:12   #1
Active Member
 
Join Date: Feb 2012
Posts: 8

Member Type
Type Undiagnosed
Diagnosed in 2012

Default OGTT blood from vein or finger.. which is more accurate

is there a difference in a way how the blood is taken? which OGTT is the most accurate, the blood taken from vein or from the finger prick? just curious, because month ago they did venipuncture test 3 hr and the numbers were much lower then what I had on my glucometer in the same time of course.

florida2001 is offline  
Old 08-23-2015, 10:34   #2
Active Member
 
Join Date: Sep 2010
Posts: 8,607


10903 likes received
1862 likes given
Default

Blood from your capillaries tends to be out of sync with blood from a vein (basically, the vein reflects the position about half an hour before hand).

That's why meters that allow you to use 'alternative sites' for testing usually suggest not using anything except the fingertip when checking for hypos.

In a stable situation, it possibly doesn't matter too much but you'll get some anomalous results if you compare a finger tip test with that from a vein. As always consistency is important.

RobertIA and Shanny like this.

Last edited by John.in.France; 08-23-2015 at 10:36.
John.in.France is offline  
Old 08-23-2015, 15:26   #3
RCG
Senior Member
 
Join Date: Apr 2013
Location: USA
Posts: 970

Member Type
Type 2
Diagnosed in 1990

1389 likes received
1366 likes given
Default

They are two different things, and the answer hinges on what you mean by "accurate". In general, they are each "accurate" by their own standards. (if measured with a good instrument.)
If you are talking about what we measure with our meters, as opposed to a laboratory measurement, made with a calibrated instrument, the lab test is the more accurate.

In a venous sample, there is also the averaging effect of a large sample, whereas blood is not really homogeneous on a microliter scale.

__________________
Meters
1. Accu-Chek Advantage
2. Accu-Chek Compact
3. Accu-Chek Compact Plus (2007-2013)
4. Bayer Contour USB (2013-2015)
5 Bayer Contour Next USB (2015- )
RCG is offline  
 
Old 08-25-2015, 16:21   #4
Active Member
 
Join Date: Feb 2012
Posts: 8

Member Type
Type Undiagnosed
Diagnosed in 2012

Default

Hi, this is the difference in numbers taken with glucometer and blood taken from vein.


Glucometer results
Fast 82
30 min 175
60 min 170
90 min 150
120 min 145
150 min 120
180 min 63

Blood taken from vein
Fast 75
1 hour 127
2 hours 122
3 hours 44

florida2001 is offline  
Old 08-25-2015, 19:07   #5
Moderator
 
mbuster's Avatar
 
Join Date: Sep 2011
Location: SW Arkansas
Posts: 8,989

Member Type
Type 2
Diagnosed in Feb. 2012

10944 likes received
6044 likes given
Default

I think this shows the value of doctors using a CGM. I'd almost bet there was an undetected spike using hourly catches.

Shanny likes this.
__________________
Think I've had this since 2003. Told I was Type 2 lean on 2/13/12.
a1c 8.8 (8/2011) 5.4 (10/2018)
TC 206 LDL 102 HDL 85 TG 96 (10/2018)
Supplemental vitamins and electrolytes
63 YY Love the LCHF diet. The cheese goes well with my whine

updated 10/26/18
mbuster is online now  
Closed Thread

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
New Blood Testing Device, No Finger Sticks Richard157 Diabetes 4 08-22-2015 17:30
Finger prick - blood a little thicker ? just_tryin Diabetes 5 04-28-2015 02:43
hit a Vein sheriberi623 Diabetes Forum Lounge 3 06-21-2013 18:45
Test For Blood Sugar Not Accurate In Diabetic Dialysis Patients george jacob Diabetes Symptoms 2 03-26-2008 18:17
Test For Blood Sugar Not Accurate In Diabetic Dialysis Patients george jacob Diabetes News 0 02-21-2008 10:46

LEGAL NOTICE
By using this Website, you agree to abide by our Terms and Conditions (the "Terms"). This notice does not replace our Terms, which you must read in full as they contain important information. You must not post any defamatory, unlawful or undesirable content, or any content copied from a third party, on the Website. You must not copy material from the Website except in accordance with the Terms. This Website gives users an opportunity to share information only and is not intended to contain any advice which you should rely upon. It does not replace the need to take professional or other advice. We have no liability to you or any other person in respect of any content on this Website.


All times are GMT +1. The time now is 12:26.




Powered by vBulletin®
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.