10- Empyema

• Definition: Empyema is the abnormal accumulation of pus in the pleural space.

Three Stages of Empyema:

• 1. Exudative Phase (2–5 days): Accumulation of sterile fluid with normal glucose and pH.
  2. Fibrinopurulent Phase (5–10 days): Accumulation of pus, bacteria, and fibrin leading to loculations (grapelike pockets).
  3. Organizational Phase (2–3 weeks): Formation of a thick pleural peel and inelastic membrane (trapped lung).
• Diagnosing Fibrino-purulent Empyema: Diagnosis is based on pleural fluid analysis showing pH < 7.2, Glucose < 60 mg/dL, and LDH > 1000 U/L.
• Relationship to Pneumonia: Empyema typically starts as a complication of pneumonia (Pneumonia → Parapneumonic Effusion → Empyema).
• comp of empyema اللي هي عباره عن plurai effusion جا عليه pus lead to empyema with bronchpleural fistula اللي هي من ال SLS
• Clubbing: Clubbing of the fingernails is a sign of chronic empyema, not acute.
• Investigation and Confirmation: Diagnosis is confirmed by thoracentesis (diagnostic tap), which reveals frank pus or cloudy fluid containing bacteria.
• Treatment: The fundamental rule is "once there is pus, there must be drainage." Management includes high-dose IV antibiotics and intercostal tube drainage (chest tube).
• Origin: Most commonly follows bacterial pneumonia (60% of cases).
• Physical Sign: Stony dullness is felt on percussion over the fluid..
• Surgical Rule: Pus must be removed via Chest Tube, VATS, or Decortication (stripping the peel).
• Loculations: Fibrin creates pockets (loculations) in the second stage, often requiring fibrinolytics to dissolve clots.
• Chronic Complication: If untreated, it leads to Fibrothorax (trapped lung).