11.6 Thoracic Surgery: Chest Trauma, Pleural & Lung Disease
Key Takeaways
- Life-threatening chest trauma is identified and treated during the primary survey (ABCDE): tension pneumothorax needs immediate needle decompression, massive haemothorax needs a large-bore chest tube and fluid resuscitation, and cardiac tamponade needs pericardiocentesis.
- Flail chest (≥2 fractures in ≥3 ribs) causes paradoxical segment movement; management is analgesia, pulmonary toilet and mechanical ventilation for respiratory failure — surgical fixation for severe instability.
- Empyema is staged exudative/fibrinopurulent/organised; early stages need antibiotics plus chest tube, organised empyema needs decortication.
- Surgical resection is offered for bronchiectasis localised to a lobe, lung abscess unresponsive to drainage/antibiotics, and operable non-small-cell lung cancer (lobectomy/pneumonectomy with nodal staging).
- Mediastinal masses are characterised by compartment: anterior (thymoma, teratoma, lymphoma), middle (cyst, lymphoma), posterior (neurogenic tumour); thymoma is associated with myasthenia gravis.
11.6 Thoracic Surgery: Chest Trauma, Pleural & Lung Disease
High-Yield Core Concept: Thoracic surgery is a named Surgery syllabus specialty. CMS stems focus on the trauma patterns that kill within minutes (tension pneumothorax, tamponade, massive haemothorax) and the elective indications for lung/pleural operations.
1. Chest Trauma — the Primary Survey
Blunt or penetrating chest injury is the second leading cause of trauma death. ATLS primary survey identifies immediately life-threatening thoracic injuries:
| Injury | Recognition | Immediate action |
|---|---|---|
| Tension pneumothorax | Hypoxia, hypotension, tracheal deviation to opposite side, absent breath sounds, distended neck veins | Needle thoracostomy (2nd ICS mid-clavicular) → chest tube |
| Massive haemothorax | Dullness, absent breath sounds, hypotension after chest trauma | Large-bore chest tube + IV fluids/blood |
| Cardiac tamponade | Beck's triad (hypotension, muffled heart sounds, raised JVP), pulsus paradoxus | Pericardiocentesis / thoracotomy |
| Open pneumothorax | Sucking chest wound | 3-sided occlusive dressing → chest tube |
| Flail chest | ≥2 fractures in ≥3 adjacent ribs, paradoxical segment movement | Analgesia, pulmonary toilet, O₂; ventilation if respiratory failure |
Chest tube insertion — 4th–5th intercostal space, mid-axillary line ('safe triangle'); connected to underwater seal; bubbling indicates an air leak, swinging indicates tube patency.
2. Pleural Disease
Pneumothorax
- Spontaneous primary — tall young male smoker (apical bulla); small (<2 cm) → observe, larger → aspirate/chest tube.
- Spontaneous secondary — underlying lung disease (COPD, CF); chest tube; treat the cause.
- Tension — decompress immediately (above).
Haemothorax — blood in the pleural cavity, usually traumatic. Massive = >1,500 mL initial drainage or >200 mL/hour → thoracotomy for surgical control.
Empyema — pus in the pleural cavity, often post-pneumonia. Stages:
- Exudative (free-flowing fluid) — antibiotics + chest tube.
- Fibrinopurulent (loculated) — chest tube ± fibrinolytics.
- Organised (cortical peel, trapped lung) — decortication (thoracotomy/VATS).
3. Surgical Lung Disease
Lung abscess — necrotic cavitating infection (aspiration, aspiration pneumonia). Medical management (prolonged antibiotics targeting anaerobes + postural drainage); surgical resection reserved for abscesses unresponsive to medical therapy, massive haemoptysis, or rupture into pleura (empyema/bronchopleural fistula).
Bronchiectasis — irreversible airway dilatation (post-infection, CF, immunodeficiency). Medical first; surgical resection (lobectomy) for disease localised to one lobe with refractory symptoms or massive haemoptysis.
Lung cancer resection:
- Non-small-cell lung cancer (NSCLC), stages I–II (and selected IIIA) with adequate pulmonary reserve → anatomical resection (lobectomy/pneumonectomy) + hilar/mediastinal nodal sampling.
- Pre-op assessment: FEV₁ and DLCO; predicted post-operative values guide operability.
- Small-cell lung cancer is rarely surgical (early disseminated; chemo-radiotherapy).
4. Mediastinal Masses
| Compartment | Typical masses |
|---|---|
| Anterior | Thymoma, germ-cell tumour (teratoma), lymphoma, thyroid |
| Middle | Pericardial/bronchogenic cyst, lymphoma |
| Posterior | Neurogenic tumour (schwannoma, neuroblastoma) |
Thymoma is the commonest anterior mediastinal tumour in adults and is associated with myasthenia gravis (~30%); thymectomy can improve myasthenia. Anterior mediastinal masses also follow the '4 Ts' mnemonic (Thymoma, Teratoma, Thyroid, Terrible lymphoma).
5. Oesophageal Surgery
Surgical indications include oesophageal cancer (squamous — smoking/alcohol, upper/mid; adenocarcinoma — Barrett's, lower), achalasia (Heller myotomy ± fundoplication for refractory cases after pneumatic dilation), perforation (Boerhaave syndrome — surgical repair), and stricture (dilatation, resection for refractory/malignant).
6. Pulmonary Complications & Surgical Decision-Making in Chest Trauma
Beyond the immediately life-threatening injuries, blunt chest trauma produces secondary pulmonary complications that delay recovery and test surgical judgement.
Pulmonary contusion is the commonest lung injury after blunt trauma. Capillary rupture causes alveolar haemorrhage and oedema that worsens over 24–48 hours, producing hypoxia, diffuse infiltrates on X-ray and reduced compliance. Management is supportive — oxygen, lung-protective ventilation if respiratory failure develops, fluid restriction and chest physiotherapy; over-resuscitation worsens the contusion.
Retained haemothorax — incomplete drainage leaves clotted blood that fibroses into a fibrinous peel (similar to empyema) and traps the lung. Persistent opacification after chest-tube drainage warrants VATS evacuation within ~7 days before organisation makes decortication necessary.
Bronchopleural fistula — a persistent large air leak (bubbling throughout the respiratory cycle) after trauma or resection signals a bronchial disruption; high-frequency jet ventilation and surgical repair may be needed to maintain oxygenation and achieve lung re-expansion.
Worked scenario: a 30-year-old driver with rib fractures and a small haemothorax becomes progressively hypoxic at 36 hours despite a chest tube — the diagnosis is evolving pulmonary contusion, not tube malposition, and the response is lung-protective ventilation and fluid minimisation, not a larger chest tube.
Decision checkpoints: (1) air-leak persisting >5 days or >2 L/day ongoing → consider thoracotomy; (2) post-traumatic empyema within 7 days → VATS; (3) suspected tracheobronchial injury (massive subcutaneous emphysema, failing to ventilate) → urgent bronchoscopy and surgical repair.
Key Takeaways for the CMS Candidate
- Tension pneumothorax → immediate needle decompression, not a chest X-ray first.
- Massive haemothorax = >1,500 mL initial or >200 mL/hour → thoracotomy.
- Empyema progression dictates treatment: chest tube early → decortication when organised.
- NSCLC operability hinges on stage and predicted post-operative FEV₁/DLCO.
- Anterior mediastinal mass = 4 Ts; thymoma links to myasthenia gravis.
A chest trauma patient is hypoxic, hypotensive, has absent breath sounds on the right, tracheal deviation to the left and distended neck veins. What is the most appropriate immediate action?
A patient with a post-pneumonic pleural collection has been drained by chest tube but remains septic after 3 weeks; CT shows a thick pleural peel with a trapped lung. What is the most appropriate next step?