PERC rule: Difference between revisions

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Pulmonary Embolism Rule Out (PERC) Criteria
Pulmonary Embolism Rule Out (PERC) Criteria


If all BREATHS are present AND low suspicion for PE, no D-dimer needed:
If all are present AND low suspicion for PE, no D-dimer needed:
*B- No blood in sputum
#Age <50yr
*R- Room air sat > 95%
#Pulse ox >94% (room air)
*E- No estrogen or hormone use
#HR <100
*A- Age < 50
#No prior PE or DVT
*T- No prior DVT or PE
#No recent surgery or trauma (within prior 4wk)
*H- HR < 100
#No hemoptysis
*S- No surgery/trauma requiring hospitalization in past 4 weeks
#No estrogen use
#No unilateral leg swelling


*Note: Inclusion Criteria
*Note: Inclusion Criteria

Revision as of 18:43, 22 May 2011

Pulmonary Embolism Rule Out (PERC) Criteria

If all are present AND low suspicion for PE, no D-dimer needed:

  1. Age <50yr
  2. Pulse ox >94% (room air)
  3. HR <100
  4. No prior PE or DVT
  5. No recent surgery or trauma (within prior 4wk)
  6. No hemoptysis
  7. No estrogen use
  8. No unilateral leg swelling
  • Note: Inclusion Criteria
    • Use this criteria if confident in excluding PE with negative D-dimer


  • Validated on 7527 patients
    • Only 0.9% had PE when PERC -, no deaths