mQuickCalcMedical
←Back to Tools
🫀

🫁 PERC Rule

PE Rule-Out Criteria
💡 If ALL 8 criteria are negative, PE can be ruled out without D-dimer (<1.6% PE risk).
Check criteria that are POSITIVE (present).
Age <50 years
+1
Heart rate <100 bpm
+1
SpO₂<95% on room air
+1
Unilateral leg swelling (DVT sign)
+1
Hemoptysis
+1
Surgery or trauma within 4 weeks
+1
Previous VTE (DVT/PE)
+1
Estrogen use (OCP/HRT)
+1
-
-

📊 Clinical Action

-

📚 Evidence & Guidelines Class I Recommendation
★★★★★ (2004)
Citation: Kline JA, Mitchell AM, Kabrhel C, et al. Clinical criteria to prevent unnecessary diagnostic testing in emergency department patients with suspected pulmonary embolism. J Thromb Haemost. 2004;2(8):1247-1255.
Guideline: ACEP Clinical Policy
📖 View on PubMed
class="disc">⚠️ Medical Disclaimer

For ED use only. Clinical judgment required.

We currently set no tracking or advertising cookies. A single non-identifying preference is stored on your device to remember this notice. If advertising or analytics partners that set cookies are added later, we will ask for your consent first. See our Cookie notice and Privacy Policy.