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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.
Recipients in this category include those with idiopathic thrombocytopenic purpura or drug-induced thrombocytopenia. Platelet transfusions are generally not recommended for this group of patients because the underlying cause involves antibodies that destroy platelets, therefore any newly transfused platelets will also be destroyed.
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.
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 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. [15] [8]
The experiment was undertaken in 1950 by William J. Harrington and James W. Hollingsworth, who postulated that in patients with idiopathic thrombocytopenic purpura (ITP), it was a blood factor that caused the destruction of platelets. [2] To test this hypothesis, Harrington received 500 ml of blood from a patient with ITP. [2] Within three ...
Thrombocytopenic purpura are purpura associated with a reduction in circulating blood platelets which can result from a variety of causes, [1] ...
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 ]
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