Hematology · Internal Medicine
HERDOO2 Rule (Unprovoked VTE in Women) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
0
HERDOO2 score 0
Interpret only within the cited source population and criteria; use alongside complete clinical assessment.
Formula inputs
- age gt 65
- bmi ge 30
- post phlebitic signs
- d dimer ge 250
Primary source
Rodger MA et al. Rivaroxaban or aspirin for extended treatment of venous thromboembolism. N Engl J Med. DOI: 10.1056/NEJMoa1700518. PMID: 28328310. Scope: HERDOO2 score counts age >65 years, BMI ≥30 kg/m², post-phlebitic signs, and D-dimer ≥250 μg/L; score 0 identifies women at low recurrence risk after stopping anticoagulation in the derivation cohort. (2017)
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