Wells Score for PE
Assess clinical probability of pulmonary embolism using Wells criteria.
Wells Criteria for PE
Select all criteria that apply:
Wells Score for PE
0
Low Risk
PE Probability: 1.3%
Three-Tier Risk
Low Risk
Two-Tier Risk
PE Unlikely
Recommended Action
Low probability. Consider PERC rule. If PERC negative, no further testing. If PERC positive, D-dimer testing.
Three-Tier (Traditional) Model
- 0-1: Low risk (1.3%)
- 2-4: Moderate risk (16.2%)
- > 4: High risk (37.5%)
Two-Tier (Simplified) Model
- ≤4: PE unlikely (12.1%)
- > 4: PE likely (37.1%)
Diagnostic Algorithm
Low risk: PERC rule first, then D-dimer if PERC positive
Moderate risk: D-dimer, CTPA if positive
High risk: Direct to CTPA