Haematology / Emergency
Wells Score
Clinical probability scoring for Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE) — includes D-dimer decision pathways, PERC rule, and anticoagulation guidance.
DVT Criteria
Total Score
0
2-Level Model (NICE Recommended): DVT Unlikely
Score ≤ 1 — Request D-dimer. If negative, DVT excluded. If positive, arrange proximal leg vein ultrasound.
3-Level Model: Low Probability
DVT prevalence in this group: ~5%
Decision Pathway
1Wells DVT Score \u2264 1 \u2014 DVT unlikely
2Request D-dimer
D-dimer negative \u2192 DVT excluded
D-dimer positive \u2192 Proximal leg vein ultrasound
3Age-adjusted D-dimer: (Age \u00d7 10) \u00b5g/L for patients > 50 years