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Haematology · Internal Medicine

HIT Expert Probability (HEP) Score calculator

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

Clinical inputs

Magnitude of platelet fall
Timing of platelet fall
Thrombosis / other sequelae
Other causes of thrombocytopenia

Result

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Clinical inputs

  • Magnitude of platelet fall
  • Timing of platelet fall
  • Thrombosis / other sequelae
  • Other causes of thrombocytopenia

Primary source

Cuker A et al. The HIT Expert Probability (HEP) Score: a novel pre-test probability model for heparin-induced thrombocytopenia. DOI: 10.1111/j.1538-7836.2010.03944.x. PMID: 20854372. Scope: HEP Score weighted model (magnitude of fall, timing, thrombosis, other causes) ranging approximately −7 to +15; higher scores increase HIT pretest probability versus the 4Ts. (2010)

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