Sensitization: A condition of being made sensitive to a specific substance (antigen)
after the initial exposure to that substance. This results in memory cells that rapidly
produce antibodies following a second exposure to the antigen. See Anamnestic
Sepsis: Pathological state, usually febrile, resulting from the presence of
microorganisms or their poisonous products in the blood stream.
SF Form 518: Medical Record - Blood or Blood Component Transfusion.
Shelf Life: The amount of time blood or blood products may be stored upon collection.
Single Donor Platelets: Platelets collected from a single donor by apheresis.
SOP: Standing Operating Procedures are detailed written and approved instructions for
how a process is to be performed.
Storage Lesion: A loss of viability and function associated with certain biochemical
changes that are initiated when blood is stored in vitro.
Stroma: The red cell membrane that is left after hemolysis has occurred.
STS: Serologic Test for Syphilis.
Syphilis: An infectious chronic venereal disease characterized by lesions and is
caused by Treponema palladium.
Tachycardia: Abnormal rapidity of heart action, usually a heart rate over 100 beats per
Tare Weight: Weight of an empty container.
TBTC: Transportable Blood Transshipment Center.
Tetany: A nervous affection characterized by intermittent spasms of the muscles of the
Titer: A measure of the strength of an antibody by testing its reactivity at increasing
dilutions against the appropriate antigen.
TMMMC: Theater Medical Material Management Center. Provides centralized, theater-
level inventory management of Class VIII materials to include blood. Primary mission for
blood is to help transport throughout the theater.
TMO: Transportation Management Office.