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Further, in those with ITP, platelet counts usually return to pre-pregnancy levels after delivery. [63] Anti-platelet autoantibodies in a pregnant woman with ITP will attack the patient's own platelets and will also cross the placenta and react against fetal platelets leading to thrombocytopenia.
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]
The threshold for treating ITP has decreased since the 1990s; hematologists recognize that patients rarely spontaneously bleed with platelet counts greater than 10,000/μL, although exceptions to this observation have been documented.
Platelet transfusions are traditionally given to patients undergoing chemotherapy for leukemia, multiple myeloma, those with aplastic anemia, AIDS, hypersplenism, idiopathic thrombocytopenic purpura (ITP), sepsis, bone marrow transplant, radiation treatment, organ transplant or surgeries such as cardiopulmonary bypass.
Blood transfusions are typically used in patients with secondary anaemia rather than isolated thrombocytopaenia as the platelets will likely be destroyed on transfusion. [8] Fluid therapy may be used to correct hypovolaemia and dehydration in cases without anaemia; however, this decreases platelet production.
Thrombotic thrombocytopenic purpura (TTP) is a blood disorder that results in blood clots forming in small blood vessels throughout the body. [2] This results in a low platelet count , low red blood cells due to their breakdown , and often kidney , heart , and brain dysfunction. [ 1 ]
In 1991, Semple, along with John Freedman, discovered a T helper cell defect in patients with the bleeding disorder called immune thrombocytopenia (ITP). [1] ITP is a condition of having a low platelet count (thrombocytopenia) and most causes appear to be related to antibodies and T cells against platelets. Very low platelet counts can lead to ...
Immune thrombocytopenic purpura is a condition in which platelets are destroyed by an autoimmune process. Platelets are a component of blood that contribute to the formation of blood clots in the body to prevent bleeding. The syndrome was first described in 1951 by R. S. Evans and colleagues. [1]
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