Blood Transfusions

This information is useful for children, adults, and older adults
Close up of a hand of a person receiving a blood transfusion.

You never know when you may need a blood transfusion. Transfusions occur when a blood from a donor is infused into a patient. This usually happens when certain components of the patient’s blood, such as red blood cells or platelets, become too low. 

“Transfusions are as safe now as they’ve ever been in the era of modern medicine,” says Yale Medicine pathologist Jeanne Hendrickson, MD, associate director of Yale Medicine's Blood Bank. While blood transfusions are life-saving treatments, like all medical procedures, they come with some risks. Physicians and staff at Yale Medicine take additional measures to ensure safe transfusions.