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Low levels of platelets in turn may lead to prolonged or excessive bleeding. It is the most common coagulation disorder among intensive care patients and is seen in a fifth of medical patients and a third of surgical patients. [3] A normal human platelet count ranges from 150,000 to 450,000 platelets/microliter (μL) of blood. [4]
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]
[1] [2] Kidney problems and low platelets then occur as the diarrhea progresses. [1] Children are more commonly affected, but most children recover without permanent damage to their health, although some children may have serious and sometimes life-threatening complications. [6] Adults, especially the elderly, may show a more complicated ...
Nevertheless, in the case of an ITP patient already scheduled for surgery who has a dangerously low platelet count and has experienced a poor response to other treatments, IVIg can rapidly increase platelet counts, and can also help reduce the risk of major bleeding by transiently increasing platelet counts.
This results in platelet activation and the formation of platelet microparticles, which initiate the formation of blood clots; the platelet count falls as a result, leading to thrombocytopenia. [1] [7] In addition, the reticuloendothelial system (mostly the spleen) removes the antibody-coated platelets, further contributing to the thrombocytopenia.
Kasabach–Merritt syndrome (KMS), also known as hemangioma with thrombocytopenia, [1] is a rare disease, usually of infants, in which a vascular tumor leads to decreased platelet counts and sometimes other bleeding problems, [2] which can be life-threatening. [3] It is also known as hemangioma thrombocytopenia syndrome.
A platelet transfusion is required immediately if there is severe or life-threatening bleeding. [19] [20] If life-threatening bleeding occurs, for example an intracranial hemorrhage, then the platelet count needs to be increased to decrease the risk of further bleeding (> 100,000 μL −1). [19] [20]
Thrombocytopenia – a deficiency of platelets; Pancytopenia – when all three types of blood cells; red blood cells, white blood cells, and platelets, are all deficient. This is a life-threatening disorder that is a characteristic of aplastic anemia. [3] There are also two general causes of cytopenia: autoimmune and refractory.