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Drug-induced thrombocytopenic purpura is a skin condition result from a low platelet count due to drug-induced anti-platelet antibodies caused by drugs such as heparin, sulfonamides, digoxin, quinine, and quinidine.
One common definition of thrombocytopenia requiring emergency treatment is a platelet count below 50,000/μL. [5] Thrombocytopenia can be contrasted with the conditions associated with an abnormally high level of platelets in the blood – thrombocythemia (when the cause is unknown), and thrombocytosis (when the cause is known). [6] [7]
Heparin-induced thrombocytopenia (HIT) is the development of thrombocytopenia (a low platelet count), due to the administration of various forms of heparin, an anticoagulant. HIT predisposes to thrombosis (the abnormal formation of blood clots inside a blood vessel ).
Thrombotic thrombocytopenic purpura (TTP) initially presents with a range of symptoms that may include severe thrombocytopenia (platelet count usually < 30,000/mm³), microangiopathic hemolytic anemia (evidenced by schistocytes in the blood smear), and various clinical signs such as petechiae, purpura, neurologic symptoms, myocardial ischemia ...
By tradition, the term idiopathic thrombocytopenic purpura is used when the cause is idiopathic, or unknown. However, most cases are now considered to be immune -mediated. [ citation needed ]
Pseudothrombocytopenia (PTCP) or spurious thrombocytopenia is an in-vitro sampling problem which may mislead the diagnosis towards the more critical condition of thrombocytopenia. The phenomenon may occur when the anticoagulant used while testing the blood sample causes clumping of platelets which mimics a low platelet count. [ 1 ]
Drug induced immune mediated hemolytic anemia Penicillin (high dose) Methyldopa; Hemoglobinopathies (where these is an unstable or crystalline hemoglobin) Paroxysmal nocturnal hemoglobinuria (rare acquired clonal disorder of red blood cell surface proteins) Direct physical damage to RBCs Microangiopathic hemolytic anemia
Danaparoid is used for thrombosis prophylaxis and treatment in heparin-induced thrombocytopenia patients. Although pre-treatment serological cross-reactivity with heparin-induced antibodies can occur in 5.2% of the patients it bears no systematic relationship with clinical cross-reactivity, 3.2% in the same study of 1478 patients with acute HIT ...
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