During my blood test can they continue drawing blood to donate it?

Typically you have to go to a blood bank to have blood donated. Most of the time when you are going to have a routine test done you are going to a lab where the orders for the tests are. If you can find a way to arrange for there to be a crossover between these two things you might be able to do it. But that is typically pretty unlikely.

The needle they use to take blood for tests is smaller than the needle they use to take blood for donation and so the length of time it would to take to get the required amount would be a lot longer.

Consider the logistics.

Blood drives are conducted to gather mass quantities of blood from multiple donors, then catalog, store and distribute it as needed.

While it is considerate of you to want to donate your blood, it is not at all simple for the blood testing organization / lab / physician’s office assistants to perform the necessary collection and cataloging, and then they have to deliver your single pint of blood to the Red Cross or other collecting organization. The costs to all involved (except you) are out of proportion to the value of the donation. (In addition to the foregoing, blood collections are done with you in a supine position in case you become faint; blood testing usually occurs with you seated, and takes just a minute or two.)

Always consider logistics. It’s much easier during the blood drive to have many donors walk into the facility that is already set up to process the donation from start to finish.

By all means, donate blood! Even if you have to go someplace else at another time. (See above for suggestions.) It’s something to feel good about and much needed because a lot of people are not able to give blood because of a variety of health problems they have.

I just had my blood drawn today. I have a signed a consent form that allows them to draw an extra vial for research, whatever that means.

@YARNLADY Thank you for the info. I’d be interested in knowing what research they were referring to…

It’s for the Human Genome Epidemiology