Hematology and Oncology Book


Deep Vein Thrombosis Probability

Aka: Deep Vein Thrombosis Probability, DVT Probability, Wells Clinical Prediction Rule for DVT
  1. See Also
    1. Deep Vein Thrombosis
  2. Indications
    1. Assess DVT Pretest Probability
  3. Criteria
    1. Active malignancy within last six months: 1 point
    2. Lower extremity immobility: 1 point
      1. Cast
      2. Paralysis
    3. Restricted mobility within last 4 weeks: 1 point
      1. Bedridden for more than 3 days
      2. Major surgery
    4. Localized pain over deep venous course: 1 point
    5. Calf circumference 3 cm over opposite calf: 1 point
      1. Measure 10 cm below tibial tuberosity
    6. Entire leg swollen: 1 point
    7. Unilateral lower extremity Pitting Edema: 1 point
    8. Non-varicose collateral superficial veins: 1 point
    9. Other diagnosis at least as likely as DVT: -2 points
  4. Interpretation
    1. Low Probability (3% DVT frequency): 0 Points
    2. Medium Probability (17% DVT frequency): 1-2 Points
    3. High Probability (75% DVT frequency): >2 Points
  5. References
    1. Wells (1997) Lancet 350:1795-98 [PubMed]
    2. Ofri (2000) West J Med 173:194 [PubMed]

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