Acute Respiratory Distress: from syndrome to disease

Area of Science:

• Critical care medicine
• Pulmonology
• Pathology

Background:

• Acute Respiratory Distress Syndrome (ARDS) is a critical condition with high mortality and limited specific treatments.
• The histological hallmark, diffuse alveolar damage (DAD), is present in only about 50% of ARDS cases.
• Other histological patterns in ARDS may represent distinct diseases amenable to targeted therapies.

Purpose of the Study:

• To re-evaluate the conceptualization of ARDS from a syndrome to a specific disease.
• To explore the diagnostic and therapeutic implications of recognizing diverse histological patterns within ARDS.
• To clarify the relationship between ARDS and diffuse alveolar damage (DAD).

Main Methods:

• Narrative review of existing literature on ARDS and diffuse alveolar damage (DAD).
• Analysis of the definition and diagnostic criteria for ARDS.
• Examination of the role of histology in ARDS classification.

Main Results:

• ARDS is a heterogeneous condition, with DAD representing only one histological pattern.
• Alternative histological findings suggest underlying distinct diseases within the ARDS spectrum.
• The clinical and analytical evolution of ARDS is influenced by DAD, necessitating a reconsideration of its definition.

Conclusions:

• Classifying ARDS based solely on clinical, radiological, and gasometrical variables is insufficient.
• Recognizing specific histological patterns beyond DAD is crucial for advancing ARDS diagnosis and treatment.
• Evolving the concept of ARDS towards a disease-specific approach holds potential for improved patient outcomes.