Pleural Effusion/Pleurisy (fluid outside Lungs)

Pleural Effusion/Pleurisy (fluid outside Lungs)

Pleural Effusion refers to the accumulation of fluid in the pleural space, the thin area between the lungs and the chest wall. Pleurisy (or pleuritis) is the inflammation of the pleura, often associated with pain, and can sometimes lead to pleural effusion.

The pleura has two layers:

  1. Visceral pleura – It covers the lungs
  2. Parietal pleura – This lines the chest wall

Usually, a small amount of fluid (5–15 mL) helps to lubricate the lungs during breathing. But in pleural effusion, excess fluid builds up, making breathing difficult and potentially compressing the lungs.

Causes of Pleural Effusion

Pleural effusions can be transudative (due to imbalance in pressure) or exudative (due to inflammation or infection). Common causes include:

Transudative Causes:

Exudative Causes:

Symptoms of Pleural Effusion / Pleurisy

Diagnosis

Clinical Evaluation:

Imaging:

Diagnostic Thoracentesis:

Treatment of Pleural Effusion

Frequently Asked Questions (FAQs)

No, not exactly pleural effusion is the fluid which is around the lungs, while pulmonary edema is fluid inside the lung tissue.

Yes, especially if the underlying cause like cancer, TB, or heart failure is not fully controlled. Recurrent effusions may require long – term drainage or pleurodesis.

It can be, especially if pleurisy is involved. The sharp pain worsens with deep breaths or coughing.

No, not always. Small, stable effusions might be managed as outpatients. Large or infected effusions usually require hospital treatment.

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