Wells — DVT
Pretest probability of lower-limb DVT; alternative diagnosis −2.
Wells — Deep vein thrombosis
Principle
Sum of explicitly entered contributions; no default clinical value.
Scope
Suspected lower-limb deep vein thrombosis in adults ≥18 years, excluding pregnancy. Two-level DVT variant, distinct from Wells for pulmonary embolism.
Interpretation limits
Clinical pretest probability, without DVT diagnosis or individual percentage. An “unlikely” result does not exclude DVT; integrate D-dimer, imaging and context according to the appropriate protocol. No automatic prescription or next step.
Formula and logic
Sum of explicit contributions, without prior rounding.
Interpretation
- ≤ 1
- DVT unlikely
- > 1
- DVT likely
Definition version : 0.1.0
Sources
- NICE — NG 158 · Table 1 : two-level DVT Wells score
2020 · consulté 2026-10-06 · Nine criteria +1, alternative diagnosis −2; ≥2 likely, ≤1 unlikely. Adults excluding pregnancy.
- NHS Greater Glasgow and Clyde — Deep-vein thrombosis guideline · Wells DVT
Révision mars 2026 · Full scoring and calf measurement 10 cm below the tibial tuberosity; adapted from Wells 2003.