What do you suspect?

Active cancerTreatment within the last 6 months or palliative care
Paralysis, paresis or recent plaster immobilisation of leg
Recent bed rest or major surgeryBed-ridden for more than 3 days or major surgery in the last 12 weeks
Local tenderness along the deep venous system
Entire leg swollen
Calf swelling greater than 3 cm versus asymptomatic legMeasure 10 cm below the tibial tuberosity.
Pitting oedema greater in the symptomatic leg
Collateral superficial veins (non-varicose)
Previous documented DVT
Alternative diagnosis at least as likely as DVT
DVT Wells total
0 of 10
Complete all 10 criteria to enable copying.
Complete the assessment

Record yes or no for every criterion before interpreting the score.

DVT score thresholds

Less than 2
DVT unlikelyBegin with D-dimer where available.
2 or more
DVT likelyBegin with compression ultrasonography.
Interactive map

Diagnostic pathway

This pathway is a guide and does not replace clinical judgement. Use the appropriate protocol in pregnancy, children, upper-limb or recurrent ipsilateral DVT, and during therapeutic anticoagulation.

01
Complete the DVT criteria

The score will open the appropriate first investigation and the map will update as each result is selected.

References