PERC Rule for Pulmonary Embolism
Pulmonary embolism rule-out criteria for patients with low clinical probability.
Pre-test probability of pulmonary embolism using only objective items.
For healthcare professionals / clinical use. Not a self-diagnosis tool.
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Revised Geneva (Le Gal 2006)
Age > 65 1; previous VTE 3; surgery/fracture 2; malignancy 2; unilateral leg pain 3; haemoptysis 2; HR 75–94 3, ≥ 95 5; pain on palpation + oedema 4
A fully objective score, endorsed by ESC 2019 alongside Wells.
Compiled from the published sources above. Every statement was agreed independently by three AI research tools (Claude, ChatGPT, DeepSeek) and its source verified in PubMed or Crossref by the Hakeemly editorial team. Not reviewed by a doctor unless stated. Agreed on
4–10: intermediate probability
An illustration with sample values, worked out with the same method the tool above uses.
Shared measurements carry over automatically, in this tab only.
Pulmonary embolism rule-out criteria for patients with low clinical probability.
Heart rate over 100
Pre-test probability of pulmonary embolism.