Wells’ Criteria for Pulmonary Embolism (PE)

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Objectifies risk of pulmonary embolism.

The Wells’ Criteria risk stratifies patients for pulmonary embolism (PE) and provides an estimated pre-test probability.

The physician can then choose what further testing is required for diagnosing pulmonary embolism (i.e. d-dimer or CT angiogram).

Research authors: Philip S. Wells, David R. Anderson, Marc Rodger, Jeffrey S. Ginsberg, Clive Kearon, Michael Gent, Alexander G. G. Turpie, Janis Bormanis, Jeffrey Weitz, Michael Chamberlain, Dennis Bowie, David Barnes, Jack Hirsh

Version: 1.5

Public
Pulmonology
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V-1.5-154.25.08.25

(01)08720938015328(8012)v1.5(4326)250825(240)154

Download the User manual and consult the Intended purpose.

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Wells' Score for pulmonary embolism:

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Wells' Score for pulmonary embolism:

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The Wells’ Criteria for PE can be used with either 3 tiers (low, moderate, high) or 2 tiers (unlikely, likely), which are both endorsed by multiple guidelines.

It risk stratifies patients for pulmonary embolism (PE), and has been validated in both inpatient and emergency department settings. There must first be a clinical suspicion for PE in the patient (the criteria should not be applied to all patients with chest pain or shortness of breath, for example).

It is not meant to diagnose PE but to guide workup by predicting pre-test probability of PE and appropriate testing to rule out the diagnosis.

Its score is often used in conjunction with d-dimer testing to evaluate for PE. The criteria should not be determined after the results of a d-dimer assay are known.

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Calculations alone should never dictate patient care, and are no substitute for professional judgement. See our full disclaimer.

Underlying algorithms Part of

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Details

Algorithm author

Evidencio

Algorithm ID

154

Version

1.5

Revision date

2025-08-25

Specialty

Pulmonology

Algorithm type

Linear regression ^{(Calculation)}

MeSH terms

Pulmonary Embolism

Status

Public

Formula
No Formula defined yet

Condition	Formula

Study characteristics

Additional information

No additional information available

Study Population

Total population size: 1211

Categorical characteristics

Name	Subset / Group	Nr. of patients
Previous deep-vein thrombosis or PE	Yes	160
Normal perfusion scans	Yes	354
Nonhigh probability VQ scans	Yes	737
High probability of VQ scans	Yes	169
Events in the three-month follow-up	Normal perfusion scan group	4
Events in the three-month follow-up	Nonhigh probability VQ scan group	64
Events in the three-month follow-up	High probability VQ scan group	154

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Extra Information

	Evidencio B.V., Irenesingel 19, 7481 GJ Haaksbergen, The Netherlands
	V-1.5-154.25.08.25
	(01)08720938015328(8012)v1.5(4326)250825(240)154
	Download the User manual
	Medical device In vitro diagnostic medical device

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V-1.5-154.25.08.25

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Wells' Score for pulmonary embolism:

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Study characteristics

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Categorical characteristics

Supporting Publications

Related files

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