alexa Incidence of thrombocytopenia in hospitalized patients with venous thromboembolism.


Journal of Blood Disorders & Transfusion

Author(s): Stein PD, Hull RD, Matta F, Yaekoub AY, Liang J

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Abstract PURPOSE: To determine the incidence of heparin-associated thrombocytopenia in patients receiving prophylaxis or treatment for venous thromboembolism. METHODS: We assessed the database of the National Hospital Discharge Survey from 1979 through 2005 and complemented this with a meta-analysis of published literature. RESULT: Among 10,554,000 patients discharged from short-stay hospitals throughout the US with venous thromboembolism during the 27 years of study, secondary thrombocytopenia was coded in 38,000 patients (0.36\%). From 1979 through 1992, secondary thrombocytopenia was coded in only 0.15\% of hospitalized patients with venous thromboembolism. The frequency increased sharply to 0.54\% from 1993 through 2005. Secondary thrombocytopenia was rarely diagnosed among 1,446,000 patients aged <40 years and among 77,000 women who had venous thromboembolism with deliveries. Meta-analysis of published literature showed a higher incidence among patients who received unfractionated heparin (UFH) for prophylaxis than those who received low-molecular-weight heparin (LMWH) for prophylaxis. Treatment resulted in smaller differences of the incidence between UFH and LMWH. CONCLUSION: Heparin-associated thrombocytopenia is rare among patients aged <40 years and women following delivery. The risk of heparin-associated thrombocytopenia is more duration-related than dose-related, and higher with UFH when used for an extended duration. Our findings and those of the literature suggest that although heparin-associated thrombocytopenia is uncommon, the incidence can be minimized by use of LMWH, particularly if extended prophylaxis or extended treatment is required. This article was published in Am J Med and referenced in Journal of Blood Disorders & Transfusion

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