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Atelectasis II: Pathophysiology

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Updated: Jul 1, 2026

Surfactant Depletion Combined with Injurious Ventilation Results in a Reproducible Model of the Acute Respiratory Distress Syndrome (ARDS)

Surfactant Depletion Combined with Injurious Ventilation Results in a Reproducible Model of the Acute Respiratory Distress Syndrome (ARDS)

Published on: April 7, 2021

[Diffuse alveolar hemorrhage].

José Javier Gómez-Román¹

¹Departamento de Anatomía Patológica, Hospital Universitario Marqués de Valdecilla, Santander, Cantabria, España. apagrj@humv.es

Archivos De Bronconeumologia

|September 9, 2008

Summary

This summary is machine-generated.

Diffuse alveolar hemorrhage, often caused by lung small-vessel vasculitis, requires timely diagnosis and treatment. Classification involves pauciimmune disease, immune deposits, or miscellaneous causes, guiding management strategies.

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Area of Science:

Pulmonary Medicine
Rheumatology
Pathology

Context:

Diffuse alveolar hemorrhage (DAH) is a critical clinical syndrome.
It frequently results from small-vessel vasculitis affecting the lungs.
Prompt diagnosis and intervention are vital for patient survival.

Purpose:

To classify the diverse causes of diffuse alveolar hemorrhage.
To outline diagnostic approaches including serology and histology.
To recommend specific diagnostic procedures like video-assisted thoracoscopy and biopsy.

Summary:

DAH is categorized into pauciimmune disease (associated with antineutrophil cytoplasmic antibodies), immune deposit syndromes, and a miscellaneous group (drug reactions, infections, idiopathic).
Diagnosis integrates clinical presentation, serological markers, and histological findings.
Video-assisted thoracoscopy with biopsy is crucial for undiagnosed DAH, especially when serology is inconclusive or suspicion is high.

Impact:

Improved diagnostic accuracy for diffuse alveolar hemorrhage.
Enhanced understanding of DAH pathophysiology and classification.
Guidance for clinical management, particularly in complex or undiagnosed cases, emphasizing the role of immunofluorescence in biopsy analysis.