Blood donation before surgery

Your surgeon will be very careful during surgery to limit the amount of blood you lose. But blood may continue to ooze from tissues that were cut, even after the operation is over. To replace this blood, you may be given a blood transfusion. This is a safe and common procedure, during which you receive blood through an intravenous (IV) line placed in one of your blood vessels.

Several sources of blood are described here.

Blood From the Public (Volunteer Blood Donation)

Directed Donor Blood From a Family Member or Friend

Autologous Blood Donation (Your Own Blood)