Calc Function

    • Calcs that help predict probability of a diseaseDiagnosis
    • Subcategory of 'Diagnosis' designed to be very sensitiveRule Out
    • Disease is diagnosed: prognosticate to guide treatmentPrognosis
    • Numerical inputs and outputsFormula
    • Med treatment and moreTreatment
    • Suggested protocolsAlgorithm





    Chief Complaint


    Organ System


    Patent Pending

    Simplified PESI (Pulmonary Embolism Severity Index)

    Predicts 30-day outcome of patients with PE, with fewer criteria than the original PESI.
    When to Use
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    • Social situation should be taken into account before considering outpatient management (including the appropriate administration of anticoagulants).
    • Fewer patients were classified as low risk by sPESI than PESI, and the sPESI derivation cohort had patients with more comorbidities than the original.
    • Given low mortality of low risk PE, outpatient management would save significant funds over hospitalization (cited as $4,500 per avoided admission).


    • If the patient is considered low risk (score of 0) by the sPESI:
      • Patient has an overall low risk of mortality (1.1%) or severe morbidity (1.5%).
      • Consider outpatient management of PE if clinically appropriate and social factors allow for it.
    • If the patient is considered high risk (score of ≥ 1) by the sPESI:
      • Patient has an overall high risk of mortality (8.9%) or severe morbidity (2.7%).
      • Consider inpatient management and higher levels of care if clinically appropriate.

    Critical Actions

    • The sPESI is only meant for risk stratification of pulmonary embolism after the diagnosis has been made.
    • The sPESI can not be used to risk stratify patients who are not being treated for PE.
    • Additional pathology which could lead to morbidity or mortality should not be overlooked in the setting of low risk sPESI scores.
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