Back to Ask the Diabetes Team Ask the Diabetes Team

From Chicago, Illinois, USA:

Could you tell me why we teach not to aspirate after injecting insulin?


My understanding is that it is not necessary to aspirate, although not "wrong" to aspirate. A subcutaneous injection should not result in injection into a big blood vessel. Some bleeding that may occur at the injection site would be from nicking a small capillary.


Additional comments from Dr. Bill Quick:

"Aspirating" (drawing back on the plunger of the needle to check for blood after poking the needle through the skin) doesn't seem to be necessary. For example, aspirating is impossible with the pen injector devices.

Another reason for not recommending aspirating relates to the possibility of bruising from the inevitable wiggling of the tip of the needle that's going to occur as you aspirate. Shifting your fingers and/or hands to do the aspirating would seem likely to increase the chance that there will be additional trauma in the skin tissues, causing microbleeding and thus causing visible bruising.


Original posting 3 Feb 2000
Posted to Insulin


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

Last Updated: Tuesday April 06, 2010 15:09:08
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.