A blood transfusion is when blood is given through a vein. The blood comes from a donor.
For planned procedures, some people have their blood drawn at an earlier date and stored until the transfusion is needed.
A blood transfusion raises the level of blood cells or other specific blood products. It may be given for:
Problems are rare, but all procedures have some risk. The doctor will go over some problems that could happen, such as:
A blood test will be done to find your blood type. The donor blood will be matched to your blood type.
Allergy medicine may be given before the transfusion. This will lower the risk of a reaction.
You will be seated. A bag with blood product will be hung nearby. An IV needle will be placed into a vein in your hand or arm. The blood product will drip from the bag through the tube into your vein. The needle will be taken out when the bag is empty.
Common IV Placement
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About 2 to 4 hours
Discomfort is common at the needle insertion site. It will go away quickly.
After the procedure, the staff may:
Most people are able to resume normal activity levels.
Call your doctor if you are not getting better or you have:
If you think you have an emergency, call for medical help right away.
American Association of Blood Banks
National Heart, Lung, and Blood Institute
Canadian Blood Services
Blood transfusion. National Heart Lung and Blood Institute website. Available at: https://www.nhlbi.nih.gov/health-topics/blood-transfusion. Accessed January 12, 2021.
Blood transfusion process. American Red Cross website. Available at: https://www.redcrossblood.org/learn-about-blood/blood-transfusions/the-process. Accessed January 12, 2021.
Goel R, Chappidi M, et. al. Trends in red blood cell, plasma, and platelet transfusions in the United States, 1993-2014. JAMA. 2018;319(8):825-827.
Red blood cell transfusion. EBSCO DynaMed website. Available at: https://www.dynamed.com/procedure/red-blood-cell-transfusion. Accessed January 12, 2021.
Last reviewed February 2020 by
EBSCO Medical Review Board
Marcin Chwistek, MD
Last Updated: 1/12/2021