Lower-Extremity DVT Diagnostic Pathway (Wells + D-dimer) — free guideline decision tool
This tool applies the two-level Wells score and D-dimer to direct the next diagnostic step for suspected lower-extremity DVT.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Common questions
What does Lower-Extremity DVT Diagnostic Pathway (Wells + D-dimer) do?
Use to decide between D-dimer, compression ultrasound, and exclusion, recognizing that a 'likely' Wells goes straight to ultrasound.
How is the result calculated?
Wells ≤ 1 (unlikely): D-dimer; negative excludes, positive → CUS. Wells ≥ 2 (likely): CUS directly. Proximal-only negative CUS → 1-week repeat or whole-leg ultrasound. Cancer → ultrasound directly.
Is this a substitute for clinical judgement?
No. All results are decision-support only, for licensed clinicians. They must be individualized to the whole patient and the latest guideline version.
Run Lower-Extremity DVT Diagnostic Pathway (Wells + D-dimer) now
This tool applies the two-level Wells score and D-dimer to direct the next diagnostic step for suspected lower-extremity DVT.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.