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Fibrinolytic and inflammatory processes in pleural effusions
F Philip-Joët1, M C Alessi, C Philip-Joët
1Service de Pneumologie-Allergologie, CHU Nord, Marseille, France.
The European Respiratory Journal
|August 1, 1995
Summary
Inflammation and fibrinolysis markers differ across pleural effusion types. Plasminogen activator inhibitor and von Willebrand factor levels were higher in tuberculosis and empyema compared to cancer or cardiac failure.
Area of Science:
- Pulmonary Medicine
- Hematology
- Inflammation Research
Background:
- Pleural effusion is characterized by fluid accumulation in the pleural space.
- Understanding the interplay between inflammation and fibrinolysis is crucial for diagnosing and managing different types of pleural effusion.
Purpose of the Study:
- To evaluate major fibrinolytic parameters in relation to inflammatory markers in various pleural effusion etiologies.
- To investigate correlations between specific fibrinolytic factors and inflammatory markers in pleural fluid and plasma.
Main Methods:
- Quantified plasminogen, PAI-1, PAI-2, t-PA, u-PA, and D-dimers in plasma and pleural fluid from 60 patients.
- Correlated fibrinolytic markers with inflammatory parameters (fibrinogen, vWF, ESR, protein, WBC count).
- Analyzed data based on pleural effusion etiology: empyema, tuberculosis, cancer, cardiac failure.
Main Results:
- D-dimer levels were higher in pleural fluid than plasma.
- PAI and vWF levels were significantly elevated in tuberculosis and empyema compared to cancer and cardiac failure.
- Pleural PAI levels correlated with pleural neutrophils, vWF, and plasma fibrinogen; D-dimers correlated with blood ESR.
Conclusions:
- Fibrinolytic profiles vary significantly with the etiology of pleural effusion.
- PAI and vWF levels may serve as indicators differentiating infectious/inflammatory effusions from malignant or cardiac ones.
- Further research into alternative fibrinolytic pathways is warranted given D-dimer independence from PAI/PAI levels.