What are the Wells criteria for pulmonary embolism?

Diagnosis  ·  April 7, 2026

From the Guidelines

Wells Criteria for Pulmonary Embolism

The Wells criteria is a clinical decision rule used to assess the pretest probability of pulmonary embolism (PE) in patients presenting with suspected PE [3][5]. According to the available evidence, the Wells criteria helps classify patients as either "PE likely" or "PE unlikely" to guide further diagnostic testing [4].

Clinical Application

The Wells criteria is used in combination with D-dimer assessment to exclude PE in appropriate patients [3]. When patients are classified as "PE unlikely" using the Wells score, PE can potentially be ruled out without the need for imaging studies like computed tomographic pulmonary angiography (CTPA) [3][4].

Performance Characteristics

According to available evidence, patients classified as "PE likely" by the Wells criteria had a PE prevalence of 15.9%, while those classified as "PE unlikely" (Wells score >4) had a PE prevalence of 7.9% [4]. The automated application of Wells criteria achieved high accuracy with sensitivity of 93%, specificity of 90.5%, positive predictive value of 94.4%, and negative predictive value of 88.2% [4].

Integration with Other Tools

The Wells criteria is mentioned alongside other clinical decision rules including the Pulmonary Embolism Rule-Out Criteria (PERC) and Revised Geneva criteria as highly sensitive tools for excluding PE when combined with D-dimer assessment [3][5].

Limitation of Available Information

The sources provided do not contain the specific individual criteria or scoring components that make up the Wells score for pulmonary embolism. The sources focus on the clinical utility and performance of the Wells criteria rather than detailing the actual scoring system components.

Sources

[1]
Acute Pulmonary Embolism.
[2]
Pleurisy.
[3]
Current Diagnosis and Management of Acute Pulmonary Embolism: A Strategy for General Practitioners in Emergency Department. — Acta Medica (Hradec Kralove), 2023
[4]
Automated Pulmonary Embolism Risk Assessment Using the Wells Criteria: Validation Study. — JMIR Form Res, 2022
[5]
Venous Thromboembolism: Diagnosis and Treatment. — Am Fam Physician, 2025

Frequently Asked Questions

How is the Wells criteria used to rule out pulmonary embolism?

The Wells criteria classifies patients as 'PE likely' or 'PE unlikely' based on clinical assessment. When combined with D-dimer testing, patients classified as 'PE unlikely' can potentially avoid imaging studies like CTPA.

What is the accuracy of the Wells criteria for pulmonary embolism diagnosis?

The Wells criteria demonstrates high accuracy with sensitivity of 93%, specificity of 90.5%, positive predictive value of 94.4%, and negative predictive value of 88.2% when applied in clinical practice. PE prevalence is approximately 15.9% in 'PE likely' patients and 7.9% in 'PE unlikely' patients.

What other tools are used alongside the Wells criteria to exclude PE?

The Wells criteria is combined with D-dimer assessment and used alongside other clinical decision rules including the Pulmonary Embolism Rule-Out Criteria (PERC) and Revised Geneva criteria as highly sensitive tools for excluding pulmonary embolism.

Related Questions

Diarrea crónica en adultos Diagnosis Diarrea recurrente en adultos Diagnosis Causas de diarrea ur Rare recurrente en a Diagnosis Causas de diarrea recurrente Diagnosis

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Mentor MD assumes no liability for clinical decisions based on this content.