Acute Respiratory Distress Syndrome Phenotypes

Area of Science:

• Critical Care Medicine
• Pulmonology
• Biomarker Research

Background:

• Acute Respiratory Distress Syndrome (ARDS) has been studied for over 50 years.
• Despite advances in understanding ARDS biology, effective pharmacologic therapies are lacking.
• ARDS is increasingly recognized as a heterogeneous syndrome with distinct subphenotypes.

Purpose of the Study:

• To review the challenges and approaches in subphenotyping ARDS.
• To explore clinical, radiographic, severity, and biologic phenotypes of ARDS.
• To highlight the potential of precision medicine in developing targeted ARDS therapies.

Main Methods:

• Review of existing literature on ARDS phenotypes.
• Discussion of classification systems including the Berlin Definition.
• Exploration of methods for identifying biologic subphenotypes (endotypes) using biomarkers, genetics, and latent class analysis.

Main Results:

• ARDS exhibits heterogeneity across clinical, radiographic, and biologic domains.
• Severity classifications (mild, moderate, severe) are based on PaO2 to FiO2 ratio.
• Prone positioning and neuromuscular blockade show potential benefit in moderate to severe ARDS phenotypes.
• Biologic subphenotypes are being identified through advanced analytical approaches.

Conclusions:

• Subphenotyping ARDS is essential for advancing precision medicine.
• Identifying ARDS endotypes will enable the development of targeted therapeutics.
• Future research should focus on tailoring treatments to specific ARDS subpopulations.