blood transfusion

transfer of blood from one person into another

Blood transfusion is the process of transferring blood or blood-based products from one person into the circulatory system of another. Blood transfusions can be life-saving in some situations, such as massive blood loss due to trauma, or can be used to replace blood lost during surgery. Blood transfusions may also be used to treat a severe anaemia or thrombocytopenia caused by a blood disease. People suffering from hemophilia or sickle-cell disease may require frequent blood transfusions.
See more at Wikipedia.org...

Blood transfusion, n the administration of whole blood or a component such as packed red cells to replace blood lost through trauma, surgery, or [more]Blood transfusion - Community and Resources

Noun
1. the introduction of blood or blood plasma into a vein or artery
(synonym) transfusion
(hypernym) insertion, introduction, intromission
(hyponym) exchange transfusion

The transfer of blood or blood products from one person (donor) into another person’s bloodstream (recipient). In most situations this is done as a life saving maneuver to replace blood cells or blood products lost through severe bleeding. Transfusion of your own blood (autologous) is the safest method but requires planning ahead and not all patients are eligible. Directed donor blood allows the patient to receive blood from known donors. Volunteer donor blood is usually readily available and when properly tested has a low incidence of adverse events. Blood conserving techniques are an important aspect of limiting transfusion requirements.