Overview
Clinical Meaning
The Wells scoring systems are validated clinical prediction rules that estimate pre test probability of deep vein thrombosis (DVT) and pulmonary embolism (PE), guiding the clini...
The Wells scoring systems are validated clinical prediction rules that estimate pre-test probability of deep vein thrombosis (DVT) and pulmonary embolism (PE), guiding the clinician's diagnostic workup. For DVT, the Wells score incorporates: active cancer (+1), paralysis or recent immobilization of lower extremity (+1), recently bedridden >3 days or major surgery within 12 weeks (+1), localized tenderness along deep venous system (+1), entire leg swelling (+1), calf swelling >3 cm compared to asymptomatic leg (+1), pitting edema confined to symptomatic leg (+1), collateral superficial veins (+1), and previously documented DVT (+1), with alternative diagnosis as likely or more likely than DVT (-2). Scores classify patients as low probability (0), moderate (1-2), or high (>=3). For PE, the Wells score includes: clinical signs/symptoms of DVT (+3), PE is the most likely diagnosis (+3), heart rate >100 bpm (+1.5), immobilization or surgery in previous 4 weeks (+1.5), previous DVT/PE (+1.5), hemoptysis (+1), active cancer (+1). PE probability: low (<2), moderate (2-6), high (>6). The clinical significance lies in determining the diagnostic pathway. In low-probability patients, a negative high-sensitivity D-dimer effectively excludes VTE...