For clinical reference only — does not replace local trust guidelines or clinical judgement.
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Wells Score (DVT)
DVT risk
Calculator
Active cancer (treatment within 6 mo)
+1
Paralysis, paresis or recent immobilisation
+1
Bedridden ≥ 3 d or major surgery within 12 wk
+1
Localised tenderness along deep veins
+1
Entire leg swollen
+1
Calf swelling > 3 cm vs other leg
+1
Pitting oedema in symptomatic leg
+1
Collateral superficial veins (non-varicose)
+1
Previous DVT
+1
Alternative diagnosis at least as likely (−2)
+-2
Interpretation
Score
0
DVT unlikely
DVT unlikely. D-dimer — if negative, DVT excluded; if positive, USS within 4 h.
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