**1. Introduction**

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The mechanism of disease in venous thromboembolsm (VTE) is mentioned, with emphasis on the rarer types of the disease. Next the conditions for approval of claims under the Danish Patient Insurance law are drawn up, and the typical situations for approval of VTE are listed. In the database of the DPIA we found 688 claims with this disease, and of these 421 were approved. The different types of VTE are examined, and the possibilities for prevention are discussed.
