Back to Ask the Diabetes Team Ask the Diabetes Team

From Fort Mill, South Carolina, USA:

Can you tell me if the standard normal blood sugar range 80-120 mg/dl [4.4-6.7 mmol/L] is in reference to whole blood or plasma? My new glucometer is reading about 15 points higher than my old one and they are both set for plasma, so I would like to know how far off I could be from normal. Should my goal range really be 90-130 mg/dl [5.0-7.2 mmol/L] in plasma readings?


The normal blood sugar range of 80-120 mg/dl [4.4-6.7 mmol/L] is based on whole blood assays and the average correction for serum (or plasma) is about +14 percent, which would give you a new range of approximately 90-135 mg/dl [5.0-7.5 mmol/L] of serum or (plasma). The reason for expressing levels as serum (or plasma) is that clinical laboratories usually now measure glucose in centrifuged blood samples in automated instruments that do multiple assays that require serum (or plasma).


Original posting 6 Mar 2004
Posted to Blood Tests and Insulin Injections and Other


  Back to Ask the Diabetes Team Return to the Top of This Page

Last Updated: Tuesday April 06, 2010 15:09:56
This Internet site provides information of a general nature and is designed for educational purposes only. If you have any concerns about your own health or the health of your child, you should always consult with a physician or other health care professional.

This site is published by T-1 Today, Inc. (d/b/a Children with Diabetes), a 501c3 not-for-profit organization, which is responsible for its contents. Our mission is to provide education and support to families living with type 1 diabetes.
By using this site, you agree to our Terms of Use, Legal Notice, and Privacy Policy.
© Children with Diabetes, Inc. 1995-2018. Comments and Feedback.