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Updated: Jul 26, 2025
03:22
Local Anesthetic Thoracoscopy for Undiagnosed Pleural Effusion
Published on: November 10, 2023
758
Breathlessness with Pleural Effusion: What Do We Know?
Sanjeevan Muruganandan1,2, Eleanor Mishra3,4, Bhajan Singh5,6,7
1Department of Respiratory Medicine, The Northern Hospital, Melbourne, Australia.
Seminars in Respiratory and Critical Care Medicine
|June 12, 2023
Summary
Breathlessness in pleural effusion is complex and not solely due to fluid volume. Improving diaphragm function via thoracocentesis reduces respiratory drive and breathlessness.
Area of Science:
- Pulmonology
- Respiratory Medicine
Background:
- Breathlessness is a primary disabling symptom in patients with pleural effusion.
- The exact mechanisms causing breathlessness in pleural effusion are not fully understood.
Purpose of the Study:
- To investigate the pathophysiology of breathlessness in pleural effusion.
- To understand the relationship between pleural fluid, diaphragm function, and respiratory drive.
Main Methods:
- Analysis of the correlation between effusion size, ventilatory capacity, and breathlessness.
- Evaluation of hemidiaphragm function and respiratory drive.
- Assessment of changes following thoracocentesis.
Main Results:
- Breathlessness severity weakly correlates with pleural effusion size.
- Ventilatory capacity improvements after drainage are minimal and poorly correlated with fluid volume.
- Impaired hemidiaphragm function and increased respiratory drive are key mechanisms.
- Thoracocentesis improves diaphragm movement, reduces respiratory drive, and alleviates breathlessness.
Conclusions:
- Breathlessness in pleural effusion is multifactorial, involving impaired diaphragm mechanics and increased respiratory drive.
- Thoracocentesis improves diaphragmatic neuromechanical efficiency, reducing breathlessness.
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