Which procedure serves both diagnostic and therapeutic purposes in pleural effusion management?

Which procedure serves both diagnostic and therapeutic purposes in pleural effusion management?

• A. Thoracentesis or pleural catheter
• B. CT scan
• C. Antibiotic therapy
• D. Pulmonary function testing

Answer: (A)

The key concept is that draining pleural fluid can both reveal the underlying cause and relieve symptoms. Thoracentesis provides pleural fluid for analysis (cell counts, chemistry, cultures, cytology, etc.), which helps distinguish transudates from exudates and identifies infection, malignancy, or inflammatory processes. At the same time, removing the fluid reduces pleural pressure, allows the lung to re-expand, and eases dyspnea. A pleural catheter can also drain fluid over time to control recurrent effusions, offering ongoing therapeutic benefit, and in some cases may be used alongside diagnostic sampling if needed. The other options don’t combine both diagnostic sampling and therapeutic drainage: CT scan is imaging only; antibiotics treat infection but don’t provide diagnostic fluid analysis; pulmonary function testing assesses lung function rather than managing the effusion.

The key concept is that draining pleural fluid can both reveal the underlying cause and relieve symptoms. Thoracentesis provides pleural fluid for analysis (cell counts, chemistry, cultures, cytology, etc.), which helps distinguish transudates from exudates and identifies infection, malignancy, or inflammatory processes. At the same time, removing the fluid reduces pleural pressure, allows the lung to re-expand, and eases dyspnea. A pleural catheter can also drain fluid over time to control recurrent effusions, offering ongoing therapeutic benefit, and in some cases may be used alongside diagnostic sampling if needed. The other options don’t combine both diagnostic sampling and therapeutic drainage: CT scan is imaging only; antibiotics treat infection but don’t provide diagnostic fluid analysis; pulmonary function testing assesses lung function rather than managing the effusion.