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Professional Reference tools are designed for health professionals to use. They are written by UK doctors and based on research evidence, UK and European Guidelines, so you may find the language more technical than the condition leaflets.

The Wells’ DVT Criteria can be used in the outpatient and emergency department setting. By risk stratifying to low risk (Wells’ Score <2) and a negative D-dimer, the clinician can exclude the need for ultrasound (US) to rule out DVT.

Go to the MDCalc Wells’ Criteria for DVT.


  • There is an overall low prevalence of DVT in patients where there is low (<25%) clinical suspicion.
  • The Wells' Score inherently incorporates clinical gestalt with a minus 2 score for alternative diagnosis more likely.
  • Sequelae from DVT include pulmonary embolism (PE) and pulmonary hypertension, which have an associated mortality of 1-8%.
  • Anticoagulation is the mainstay treatment for DVT with its own associated risks of bleeding.

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Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. Egton Medical Information Systems Limited has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.