Galen eCalcs - Calculator: Wells Score (DVT Risk)
Description
The Wells Score is designed to assess a patient’s probability of having deep vein thrombosis (DVT).
In those with suspected DVT, a clinical assessment of probability can be useful to determine which tests to perform.
Those with Wells scores of two or more have a 28% chance of having DVT, those with a lower score have 6% odds. Alternatively, Wells scores can be categorized as high if greater than two, moderate if one or two, and low if less than one, with likelihoods of 53%, 17%, and 5% respectively.
| Wells Score Criteria Description | Points |
|---|---|
| Active Cancer (treatment within last 6 months or palliative) | +1 point |
| Calf swelling ≥ 3 cm compared to asymptomatic calf (measured 10 cm below tibial tuberosity) | +1 point |
| Swollen unilateral superficial veins (non-varicose, in symptomatic leg) | +1 point |
| Unilateral pitting edema (in symptomatic leg) | +1 point |
| Previous documented DVT | +1 point |
| Swelling of entire leg | +1 point |
| Localized tenderness along the deep venous system | +1 point |
| Paralysis, paresis, or recent cast immobilization of lower extremities | +1 point |
| Recently bedridden ≥ 3 days, or major surgery requiring regional or general anesthetic in the past 12 weeks | +1 point |
| Alternative diagnosis at least as likely | −2 points |
Calculator Search/Filter Keywords
At the calculator level, eCalcs comes delivered with default keywords that can be leveraged in the "Search/Filter" field to enable Specialty or System driven calculator searching. The following calculator keywords are delivered by default for the Wells Score (DVT Risk) calculator:
Specialties
- Cardiology
- Critical Care
- Family Practice
- Gerontology
- Hematology
- Internal Medicine
- Neurology
- Oncology
- Orthopedics
- Surgery
- Vascular
Systems
- Cardiovascular
- Lymphatic
Calculator Inputs
This calculator does not use any default mappings, all items require manual input.
Calculator Outputs
| Output | Mapping Type | Description |
|---|---|---|
| Wells DVT Score | Result | Score from Wells’ criteria for Deep Vein Thrombosis |
| DVT Risk | Result | Risk of Deep Vein Thrombosis based on Wells’ score |
References
http://en.wikipedia.org/wiki/Deep_vein_thrombosis#Probability