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Emergency
Apply the PERC Rule to rule out pulmonary embolism in low-risk patients without D-dimer testing. Reduces unnecessary testing.
Formula
All 8 criteria must be negative to rule out PE (binary yes/no)
Inputs
Emergency
Calculate the Wells Score to estimate the clinical probability of pulmonary embolism (PE). Guide decisions on CTPA and D-dimer testing.
Formula
Wells PE = DVT symptoms(3) + PE likely(3) + HR>100(1.5) + Immobilization(1.5) + Previous(1.5) + Hemoptysis(1) + Cancer(1)
Inputs