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This is a shortened version of the fourth chapter of the ICD-9: Diseases of the Blood and Blood-forming Organs. It covers ICD codes 280 to 289. The full chapter can be found on pages 167 to 175 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1.
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]
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 ...
ITP can be difficult to distinguish from gestational thrombocytopenia (which is by far the most common cause of thrombocytopenia in pregnancy). Unlike ITP, the platelet count in gestational thrombocytopenia rarely goes below 100,000, and a platelet count below 80,000 is even more rare (seen in less than 0.1% of cases of gestational ...
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 ]
Thrombocytopenia (decrease in the number of platelets) Idiopathic thrombocytopenic purpura (ITP) Thrombotic thrombocytopenic purpura (TTP) Heparin-induced thrombocytopenia (HIT) Myeloproliferative disorders (Increased numbers of cells) Polycythemia vera (increase in the number of cells in general) Erythrocytosis (increase in the number of red ...
The 4T score for heparin-induced thrombocytopenia [9] [10] Thrombocytopenia 2 points if the fall in platelet count is >50% of the previous value, AND the lowest count (nadir) is 20–100 × 10 9 /liter 1 point if the fall is 30–50% or the nadir is 10–19 × 10 9 /liter No points if the fall is less than 30% or the nadir is <10 × 10 9 /liter ...
Thrombocytopenia (low platelet count) – increased susceptibility to bleeding and ecchymosis (bruising), as well as subcutaneous hemorrhaging resulting in purpura or petechiae [8] [9] Many individuals are asymptomatic, and blood cytopenia or other problems are identified as a part of a routine blood count: [10] Neutropenia, anemia, and ...