NCLEX Review Guide: Pleural Effusion

Definition & Types

• Pleural effusion is the abnormal accumulation of fluid in the pleural space between the visceral and parietal pleura. This fluid accumulation compresses lung tissue and impairs ventilation.
• Transudative effusions result from increased hydrostatic pressure or decreased oncotic pressure (heart failure, cirrhosis). Exudative effusions result from increased capillary permeability due to inflammation or infection (pneumonia, malignancy).

Clinical Manifestations

• Dyspnea and chest pain are the most common symptoms, with dyspnea worsening as fluid volume increases. Pain is typically sharp and pleuritic, worsening with deep inspiration.
• Physical assessment reveals decreased or absent breath sounds over the affected area, dullness to percussion, and decreased tactile fremitus on the affected side.

Diagnostic Procedures

• Chest X-ray shows blunting of costophrenic angles with as little as 250mL of fluid; larger effusions appear as homogeneous opacity with meniscus sign. CT scan provides better visualization of loculated effusions.
• Thoracentesis is both diagnostic and therapeutic, allowing fluid analysis and symptom relief. Monitor for pneumothorax post-procedure - most serious complication.

Treatment Interventions

1. Treat underlying cause - antibiotics for infection, diuretics for heart failure, chemotherapy for malignancy
2. Therapeutic thoracentesis for large effusions causing respiratory distress (can remove up to 1500mL safely)
3. Chest tube placement for complicated parapneumonic effusions or empyema with continuous drainage
4. Pleurodesis for recurrent malignant effusions to prevent reaccumulation

Priority Nursing Interventions

• Assess respiratory status frequently including rate, depth, oxygen saturation, and use of accessory muscles. Position patient in high-Fowler's or semi-Fowler's position to optimize breathing.
• Pre-thoracentesis care includes obtaining informed consent, positioning patient upright leaning forward, and ensuring emergency equipment is available. Post-procedure monitoring includes vital signs every 15 minutes initially, chest X-ray to rule out pneumothorax.

Patient Education

• Teach patients to recognize signs of respiratory distress and when to seek immediate medical attention. Emphasize importance of medication compliance for underlying conditions like heart failure.
• Post-thoracentesis instructions include avoiding strenuous activity for 24 hours, reporting chest pain or difficulty breathing immediately, and keeping puncture site clean and dry.