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 Configuration Options
| Preference Name | Valid Range | Description |
|---|---|---|
| Publishing | Checked / Unchecked | When checked the calculator will display for users on the front end. When unchecked, the calculator WILL NOT display for users on the front end. |
| Orderable Item Override | (BLANK) / G-DVTRisk | “(BLANK)” indicates that the global configuration options for Orderable Item will be used. “G-DVTRisk” indicates that the calculator specific value will be used and can display the specific calculator name in the output. |
| Show Full Questions in Annotations | True/False | True will enable the display of the full calculator input question text (rather than Q1, Q2, etc.) in the result output annotations.
False will disable the display of the full calculator input question text and display the question numbers and answers only in the result output annotations. |
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