Wells Criteria for DVT
Distinguishes DVT unlikely from DVT likely to safely govern when D-dimer vs venous duplex ultrasound is indicated.
Wells Criteria for DVT Parameters
About the Wells Criteria for DVT
Validated diagnostic decision rule stratifying the pre-test probability of lower-extremity deep vein thrombosis.
Scoring Methodology & Interpretation
The Wells Criteria for DVT uses a validated custom criteria algorithm with predefined clinical cutoffs established in peer-reviewed derivation and validation cohorts:
| Score Range | Severity Classification | Clinical Interpretation |
|---|---|---|
| -2 – 1 | DVT Unlikely | Estimated DVT prevalence is ~5% to 6%. |
| 2 – 8 | DVT Likely | Estimated DVT prevalence is ~28% to 40%. |
Clinical Pearls & Considerations
- Alternative diagnosis as likely or more likely subtracts 2 points from the total score.
Developed by Dr. Philip S. Wells and colleagues (1997, 2003). Clinical prediction rule.
This instrument is designed for educational, informational, and clinical reference purposes. Screening scores do not constitute a definitive medical diagnosis. Individual clinical management must integrate full diagnostic history, physical examination, and laboratory data by a licensed healthcare professional.
- Not validated for upper extremity DVT.
- Pregnancy alters D-dimer baseline and clinical risk criteria.
Evidence & Primary Literature Citations
- Key Validation StudyEvaluation of D-dimer in the diagnosis of suspected deep-vein thrombosis.Wells PS, Anderson DR, Rodger M, et al. N Engl J Med. 2003;349:1227-1235.
Related Validated Instruments
Validated clinical risk score predicting annual thromboembolic stroke risk in non-valvular atrial fibrillation.
Validated clinical prediction rule determining 30-day mortality and triage for community-acquired pneumonia.