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Computed tomography scan contribution to the diagnosis of community-acquired pneumonia
Nicolas Garin1,2, Christophe Marti1, Max Scheffler3
1Department of Internal Medicine, Rehabilitation and Geriatrics, Internal Medicine Unit, Geneva University Hospitals and University of Geneva.
Purpose Of Review:
Pneumonia is a frequent disease mainly affecting older and multimorbid patients. Symptoms and signs lack sensitivity and specificity, and chest X-ray has poor accuracy. Hence, an initial diagnosis of pneumonia has limited predictive value for the presence of pneumonia. Overdiagnosis of pneumonia leads to inappropriate antibiotic use and may delay the appropriate management of mimicking diseases. Alternative imaging strategies including computed tomography (CT)-scan or lung ultrasonography may improve the diagnosis of pneumonia. We review the recent evidence and perspectives regarding their contribution to the diagnosis and management of patients with suspected pneumonia.
Recent Findings:
Two studies assessed the diagnostic accuracy of CT-scan in emergency department or hospitalized patients suspected of pneumonia. CT-scan led to a net reclassification improvement of 8 and 18% of patients, and was particularly helpful to rule out the diagnosis, allowing a lowering of the number of inappropriate antibiotic prescriptions.
Summary:
CT-scan reduces overdiagnosis of pneumonia and allows a better identification of alternative diagnoses. The impact on clinical outcomes of a strategy incorporating CT-scan for patients suspected of pneumonia should be evaluated, along with its cost-effectiveness.
Insights
Computed tomography (CT)-scans improve pneumonia diagnosis, especially for ruling out the condition. This reduces overdiagnosis and inappropriate antibiotic use in suspected pneumonia cases.
Area of Science:
- Pulmonary Medicine
- Radiology
- Infectious Diseases
Background:
- Pneumonia diagnosis is challenging due to non-specific symptoms and inaccurate chest X-rays.
- Overdiagnosis of pneumonia leads to unnecessary antibiotic use and delayed treatment of other conditions.
Purpose of the Study:
- To review recent evidence on advanced imaging for pneumonia diagnosis.
- To assess the role of CT-scans and lung ultrasonography in suspected pneumonia.
Main Methods:
- Review of two studies evaluating CT-scan diagnostic accuracy in suspected pneumonia.
- Analysis of CT-scan's impact on patient reclassification and antibiotic prescription.
Main Results:
- CT-scans improved diagnostic reclassification by 8% and 18% in studied patients.
- CT-scans were particularly effective in ruling out pneumonia, reducing antibiotic prescriptions.
Conclusions:
- CT-scans aid in reducing pneumonia overdiagnosis and identifying alternative diagnoses.
- Further evaluation of CT-scan's impact on clinical outcomes and cost-effectiveness is needed.
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