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Higher platelet transfusion thresholds have been used in premature neonates, but this has been based on limited evidence. [19] There is now evidence that using a high platelet count threshold (50 x 10 9 /L) increases the risk of death or bleeding compared to a lower platelet count threshold (25 x 10 9 /L) in premature neonates. [20]
Blood compatibility testing is routinely performed before a blood transfusion.The full compatibility testing process involves ABO and RhD (Rh factor) typing; screening for antibodies against other blood group systems; and crossmatching, which involves testing the recipient's blood plasma against the donor's red blood cells as a final check for incompatibility.
The most rapidly effective treatment in infants with severe hemorrhage and/or a very low platelet count (<30,000 μL −1) is the transfusion of compatible platelets (i.e. platelets from a donor who, like the mother, lacks the causative antigen). [20]
Collecting the platelets from a single donor also simplifies human leukocyte antigen (HLA) matching, which improves the chance of a successful transfusion. Since it is time-consuming to find compatible donors for HLA-matched transfusions, collecting a full dose from a single donor is more practical than finding multiple compatible donors.
Before a recipient receives a transfusion, compatibility testing between donor and recipient blood must be done. The first step before a transfusion is given is to type and screen the recipient's blood. Typing of recipient's blood determines the ABO and Rh status. The sample is then screened for any alloantibodies that may react with donor ...
The specialist Immunohematology and Transfusion Physician provides expert opinion for difficult transfusions, massive transfusions, incompatibility work up, therapeutic plasmapheresis, cellular therapy, irradiated blood therapy, leukoreduced and washed blood products, stem cell procedures, platelet rich plasma therapies, HLA and cord blood ...
Platelet transfusion is contraindicated in thrombotic thrombocytopenic purpura (TTP), as it fuels the coagulopathy. Platelet transfusion is generally ineffective, and thus contraindicated, for prophylaxis in immune thrombocytopenia (ITP), because the transfused platelets are immediately cleared; however, it is indicated to treat bleeding. [70]
Consequently, the development of pathogen inactivation/reduction technologies for blood products has been an ongoing effort in the field of transfusion medicine. A new procedure for the treatment of individual units of single-donor (apheresis) or whole blood–derived, pooled, platelets has recently been introduced.
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