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emergency
PERC Rule (Pulmonary Embolism)
Rule out PE without D-dimer in low-risk patients
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Age ≥50 years
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No
Yes
Heart Rate ≥100 bpm
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No
Yes
O2 Saturation <95% on Room Air
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No
Yes
Hemoptysis
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No
Yes
Estrogen Use
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No
Yes
Prior PE or DVT
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No
Yes
Surgery or Trauma in Past 4 Weeks
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No
Yes
Unilateral Leg Swelling
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No
Yes
Clinical Note (Optional)
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