Wells DVT Score Calculator
Calculate the Wells Score for Deep Vein Thrombosis (DVT) to estimate pretest probability and guide diagnostic workup.
Wells Criteria for DVT
Wells Score for DVT
0
Low Probability
Pretest probability: 5% (4-8%)
Two-Level Score
DVT Unlikely
Probability: 6%
Score Range
-2 to +9
Current: 0
Interpretation
Low pretest probability. D-dimer can safely exclude DVT if negative.
Recommended Next Steps
- • D-dimer testing recommended
- • If D-dimer negative: DVT excluded (negative predictive value >99%)
- • If D-dimer positive: Proceed to ultrasound
- • No imaging needed if D-dimer negative
Diagnostic Algorithm
Low (≤0): D-dimer → if negative, DVT excluded
Moderate (1-2): D-dimer → ultrasound if positive
High (≥3): Ultrasound directly
Alternative Diagnoses to Consider
CellulitisSuperficial thrombophlebitisRuptured Baker's cystMuscle strain or tearPost-thrombotic syndromeLymphedemaChronic venous insufficiency
Disclaimer: The Wells Score is a clinical decision aid and should be used in conjunction with clinical judgment. It has not been validated in pregnancy, suspected upper extremity DVT, or patients already on anticoagulation. Always consult appropriate clinical guidelines.