• Introduction of whole blood or blood component directly into the blood stream.
  CRISP Thesaurus
  National Institutes of Health, 2006
• Patient required an infusion of whole blood or a blood component directly into the bloodstream.
  U.S. FDA Glossary
  U.S. Food & Drug Administration, 2021
• The infusion of components of blood or whole blood into the bloodstream. The blood may be donated from another person, or it may have been taken from the person earlier and stored until needed.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• The infusion of whole blood or a blood component into the bloodstream.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• The injection of whole blood or a blood component directly into the bloodstream.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• The introduction of whole blood or blood component directly into the blood stream. (Dorland, 27th ed)
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• A blood transfusion is the transfer of blood or a blood component from one healthy person (a donor) to a sick person (a recipient). Transfusions are given to increase the blood's ability to carry oxygen, restore the amount of blood in the body (blood volume), and correct clotting problems.
  Merck Manuals
  Merck & Co., Inc., 2020
• A blood transfusion is a routine medical procedure in which donated blood is provided to you through a narrow tube placed within a vein in your arm.
  Mayo Clinic
  Mayo Foundation for Medical Education and Research
• Blood transfusion, the transfer of blood into the vein of a human or animal recipient. The blood either is taken directly from a donor or is obtained from a blood bank. Blood transfusions are a therapeutic measure used to restore blood or plasma volume after extensive hemorrhage, burns, or trauma...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2020