Medical

Wells Score Guide — DVT and PE Pre-Test Probability

Calculate Wells criteria for deep vein thrombosis and pulmonary embolism. Low vs high risk pathways.

Published June 1, 2025 · 1 min read

Written by Ethan Brooks · Editor-in-Chief & Product Lead

Reviewed by James Cole

Last reviewed January 15, 2026 · Editorial policy

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Wells criteria for DVT and PE

Wells score estimates pre-test probability of deep vein thrombosis or pulmonary embolism. Low-risk patients may proceed to D-dimer; high-risk patients need imaging per local pathway.

Clinical pearls

Do not use in isolation — combine with gestalt and institutional algorithms
Repeat assessment if symptoms evolve
Document score in notes for medico-legal clarity

Wells score calculator →

Disclaimer: These calculators are educational aids only. They do not diagnose, treat, or replace licensed medical advice. Always follow local clinical protocols.

Sources & references

Primary references used when researching and fact-checking this guide. See our editorial methodology.

Adobe PDF Reference — encryption — Adobe
PDF password protection and encryption standards (ISO 32000).
Ghostscript documentation — PDF settings — Artifex Software
Compression level behavior and PDF output settings.