ALL DEFINITIONSBlood TransfusionDefinitionA blood transfusion is a medical procedure in which donated blood or blood components are infused into a patient's bloodstream to replace lost blood or to treat certain medical conditions.Related SpecialistsShowing 3 of 176Cherise RowanMDErin HorstmanMDMatthew GrossmanMDMore Related SpecialistsRelated Fact SheetsBlood Transfusions for ChildrenApheresisBlood TransfusionsTwin-to-Twin Transfusion SyndromeEgg Donation (for the donor)Related NewsResearch & InnovationRelated DepartmentsShowing 3 of 8Classical Hematology at Smilow Cancer HospitalInternal MedicineYale Cancer CenterMore Related Departments