Exam

Deep Vein Thrombosis Probability

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Deep Vein Thrombosis Probability, DVT Probability, Wells Clinical Prediction Rule for DVT

  • See Also
  1. Deep Vein Thrombosis
  • Indications
  1. Assess DVT Pretest Probability
  • Criteria
  • Modified Wells Criteria
  1. Score -2: Other diagnosis at least as likely as DVT
  2. Score 1: Active malignancy within last six months (or palliative treatment)
  3. Score 1: Localized tenderness or pain over deep venous course
  4. Score 1: Entire leg swollen
  5. Score 1: Unilateral lower extremity Pitting Edema in the symptomatic leg
  6. Score 1: Non-varicose collateral superficial veins present
  7. Score 1: Previously documented DVT (added in the Modified Wells Score)
  8. Score 1: Lower extremity immobility
    1. Plaster Cast or similar
    2. Paralysis or paresis
  9. Score 1: Restricted mobility
    1. Bedridden for more than 3 days OR
    2. Major surgery in last 12 weeks
  10. Score 1: Calf circumference 3 cm over opposite calf
    1. Measure 10 cm below tibial tuberosity
  • Interpretation
  1. Low Probability (3 to 5% DVT frequency): <=0 Points
  2. Medium Probability (17% DVT frequency): 1-2 Points
  3. High Probability (53 to 75% DVT frequency): >2 Points
  • References
  1. Engelberger (2011) Thromb Res 127(6): 535-9 [PubMed]
  2. Ofri (2000) West J Med 173:194 [PubMed]
  3. Wells (1997) Lancet 350:1795-98 [PubMed]
  4. Wells (2006) JAMA 295(2): 199-207 [PubMed]