PESI combines age, comorbidities and clinical findings to stratify prognosis after pulmonary embolism is diagnosed.
Pulmonary Embolism Severity Index (PESI)
Form
Results
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Table of Contents
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What is PESI Score (pulmonary embolism risk)?
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How to Use This Calculator
- Enter or select Age, Gender, History of cancer, History of heart failure, History of chronic lung disease. Complete any remaining fields required by your chosen method.
- Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
- Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
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Formula Used
Start with age in years and add the specified clinical and history weights.
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Variables Explained
| Input | What it means |
|---|---|
| Age | Age in the time unit shown; most adult equations use completed years. |
| Gender | Select the equation or reference category that applies to the measurement being assessed. |
| History of cancer | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| History of heart failure | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| History of chronic lung disease | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Heart rate ≥110 | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Systolic BP < 100 mmHg | The upper blood-pressure reading, normally stated in mmHg. |
| Respiratory rate ≥30 | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Temperature < 36°C/96.8°F | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
| Altered mental status (disorientation, lethargy, stupor, or coma) | Select whether the person meets the stated change-in-consciousness criterion. |
| O2 saturation < 90% | Use the observed finding or laboratory value for this criterion, following the definition shown in the form. |
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Worked Example
Age 60 plus a 10-point qualifying item gives 70 before the remaining factors.
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Why Use This Calculator?
Use the calculation to make the method and its inputs easier to check with a healthcare professional. Its meaning depends on the clinical setting and on whether the underlying method is appropriate for that person.
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Common Mistakes
- PESI is a prognosis tool, not a test for whether a pulmonary embolism is present.
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Frequently Asked Questions
Is this result a diagnosis or treatment instruction?
No. It describes a calculation or score from the supplied information. A qualified clinician must check the measurements, the method’s applicability and the wider clinical picture.
Can I enter the units from any lab report?
Use the units specified in the form and select a conversion only where the page provides one. Different substances need different conversion factors; a mismatch can produce a plausible but incorrect result.
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Sources & References
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