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Hematology Ā· Internal Medicine

4Ts Score for HIT calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

Result

Complete all required inputs to calculate the score.

Formula inputs

  • Magnitude of thrombocytopenia
  • Timing of platelet-count fall
  • Thrombosis or other sequelae
  • Other causes of thrombocytopenia

Primary source

Lo GK et al. Evaluation of pretest clinical score (4 T's) for the diagnosis of heparin-induced thrombocytopenia. J Thromb Haemost (2006)

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