Interactive Wells' Criteria for DVT calculator. Requires the calculator gadget.
Usage: {{Wells DVT Calculator}}
Wells' Criteria for DVT
| Criteria
|
No
|
Yes
|
Points
|
| Active cancer (treatment within 6 months or palliative)
|
1
|
|
+1
|
| Bedridden recently >3 days or major surgery within 12 weeks
|
1
|
|
+1
|
| Calf swelling >3 cm compared to other leg (measured 10 cm below tibial tuberosity)
|
1
|
|
+1
|
| Collateral superficial veins (non-varicose)
|
1
|
|
+1
|
| Entire leg swollen
|
1
|
|
+1
|
| Localized tenderness along deep venous system
|
1
|
|
+1
|
| Pitting edema confined to symptomatic leg
|
1
|
|
+1
|
| Paralysis, paresis, or recent cast immobilization of lower extremities
|
1
|
|
+1
|
| Previously documented DVT
|
1
|
|
+1
|
| Alternative diagnosis at least as likely as DVT
|
1
|
|
−2
|
| Wells' Score
|
points
|
| Interpretation (Traditional)
|
| ≤0
|
Low Risk — 5% prevalence of DVT. Consider D-dimer to rule out.
|
| 1–2
|
Moderate Risk — 17% prevalence of DVT. Consider D-dimer or ultrasound.
|
| ≥3
|
High Risk — 53% prevalence of DVT. Ultrasound recommended.
|
| Interpretation (Dichotomized)
|
| ≤1
|
DVT Unlikely — D-dimer to rule out.
|
| ≥2
|
DVT Likely — Ultrasound recommended.
|
| References
|
- Wells PS et al. Value of assessment of pretest probability of DVT. Lancet. 1997;350:1795-1798. PMID 9428249.
- Wells PS et al. Evaluation of D-dimer in suspected DVT. N Engl J Med. 2003;349:1227-1235. PMID 14507948.
|
