[Parapneumonic pleural effusions: Epidemiology, diagnosis, classification and management]

Area of Science:

• Pulmonology
• Infectious Diseases
• Thoracic Surgery

Context:

• Parapneumonic pleural effusions are the primary cause of pleural infections, with a rising incidence.
• Microbial epidemiology differs from pneumonia, showing a higher prevalence of anaerobic bacteria.
• Early diagnosis via thoracentesis is critical for distinguishing complicated from non-complicated effusions.

Purpose:

• To review the diagnostic and therapeutic strategies for parapneumonic pleural effusions.
• To highlight the importance of early differentiation between complicated and non-complicated effusions.
• To discuss current controversies and evidence regarding treatment modalities.

Summary:

• Complicated parapneumonic effusions necessitate drainage, with options including thoracentesis, chest tube insertion, or surgery.
• Antibiotic therapy is mandatory, initiated early, and should target anaerobic bacteria unless pneumococcal infections are present.
• The efficacy of fibrinolytic agents is limited unless combined with DNase; data on chest physiotherapy are scarce.

Impact:

• Improved diagnostic accuracy and timely intervention for complicated pleural effusions.
• Optimized antibiotic selection and consideration of adjunctive therapies.
• Potential reduction in morbidity and mortality associated with pleural infections, despite high rates influenced by comorbidities.