The Wells score organizes clinical findings into an assessment of pulmonary-embolism probability.
Wells' Criteria for Pulmonary Embolism
Form
Results
0 Points
Table of Contents
1
What is Wells' Criteria?
2
How to Use This Calculator
- Enter or select Clinical signs and symptoms of DVT, PE is #1 diagnosis OR equally likely, Heart rate >100, Immobilization at least 3 days OR surgery in the previous 4 weeks, Previous, objectively diagnosed PE or DVT. Complete any remaining fields required by your chosen method.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
3
Formula Used
Add the specified 1, 1.5 and 3-point criteria for the findings selected.
4
Variables Explained
| Input | What it means |
|---|---|
| Clinical signs and symptoms of DVT | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| PE is #1 diagnosis OR equally likely | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Heart rate >100 | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Immobilization at least 3 days OR surgery in the previous 4 weeks | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Previous, objectively diagnosed PE or DVT | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Hemoptysis | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Malignancy w/ treatment within 6 months or palliative | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
5
Worked Example
DVT signs worth 3 points and heart rate over 100 worth 1.5 give a subtotal of 4.5.
6
Why Use This Calculator?
Use the calculation to make the method and its inputs easier to check with a healthcare professional. Its meaning depends on the clinical setting and on whether the underlying method is appropriate for that person.
7
Common Mistakes
- Clinical probability needs an appropriate diagnostic pathway; the score alone cannot rule a clot in or out.
8
Frequently Asked Questions
Is this result a diagnosis or treatment instruction?
No. It describes a calculation or score from the supplied information. A qualified clinician must check the measurements, the method’s applicability and the wider clinical picture.
Can I enter the units from any lab report?
Use the units specified in the form and select a conversion only where the page provides one. Different substances need different conversion factors; a mismatch can produce a plausible but incorrect result.
9
Sources & References
Mini Calculator provides online calculators for multiple niches including mathematical, financial, Health, informative, Chemistry, physics, statistics, and conversions. You can use any calculator for free without any limits.