Chest Trauma
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Direct answer
Airway, breathing, circulation — the ATLS primary survey was practically written for the chest, a major contributor to trauma deaths. The sequence to recite: tension pneumothorax decompressed before any imaging, massive haemothorax drained with immediate thoracotomy thresholds in mind, open pneumothorax sealed, flail chest managed by analgesia and ventilation, tamponade recognised on ultrasound and relieved in theatre. Resuscitative thoracotomy belongs to the penetrating-injury patient in extremis with recent signs of life, and blunt aortic injury from deceleration is sought on computed tomography and treated endovascularly.
What you must remember
- The lethal six: airway obstruction, tension pneumothorax, open pneumothorax, massive haemothorax, flail chest with pulmonary contusion, and cardiac tamponade.
- Tension pneumothorax is a clinical diagnosis: hypotension, distended neck veins, a silent hyperinflated hemithorax — decompress immediately with a needle, fifth space anterior axillary line or second space mid-clavicular, without waiting for a radiograph.
- Open pneumothorax ("sucking chest wound") gets a three-sided occlusive dressing, then a formal drain, then surgical closure — the three steps examiners ask in order.
- Massive haemothorax: drain immediately; thoracotomy if more than 1500 mL evacuates at once or output exceeds about 200 mL per hour for two to four hours, transfusing through a massive transfusion protocol with balanced components.
- Flail chest — three or more ribs fractured in two or more places with a paradoxically moving segment — is managed by aggressive analgesia (thoracic epidural first), ventilatory support and selective rib fixation; the underlying pulmonary contusion deteriorates over the first 24–48 hours — imaging lags physiology, so treat gas exchange, not the picture.
- Cardiac tamponade: Beck's triad of hypotension, rising venous pressure and muffled sounds, with pericardial fluid on ultrasound; any wound in "the box" — clavicles to costal margins — is a cardiac injury until excluded; pericardiocentesis is only a bridge to sternotomy.
- Resuscitative thoracotomy: penetrating trauma with imminent or recent arrest and signs of life — relieve tamponade, control hilar bleeding, cross-clamp the aorta; blunt indications are far narrower.
- The Indian pattern is road traffic injury — two-wheelers and pedestrians — so polytrauma dominates, and elderly rib fractures carry real pneumonia and mortality risk.
The first thirty minutes
A 30-year-old after a two-wheeler collision is tachypnoeic at 34, blood pressure 84/50, groaning. Declare the sequence. Airway patent, cervical spine protected. Breathing: absent sounds and dullness at the right base with distended neck veins — dullness says blood, so a right chest drain evacuates 1200 mL. Circulation: two large-bore cannulae, massive transfusion protocol, blood rather than crystalloid. The drain then puts out 250 mL in the next hour — the threshold clock is running. The secondary survey finds crepitus over right ribs four to seven and a FAST scan showing a pericardial stripe in a deteriorating patient: that strip changes everything — tamponade in "the box" goes to the operating theatre, not the scanner. Median sternotomy relieves a right ventricular laceration, repaired on partial occlusion. The drain numbers decide thoracotomy, the box decides sternotomy, and imaging never leads the physiology.
Two distended-neck-vein emergencies
Examiners love the tension pneumothorax versus tamponade pair because both obstruct and both kill quietly — discriminated by breath sounds and percussion. Tension: silent, hyper-resonant hemithorax, trachea pushed away, no pericardial fluid on ultrasound; treatment a needle and a drain. Tamponade: normal breath sounds, pericardial fluid on FAST, often a penetrating box wound; treatment is theatre. Draining the wrong one wastes the golden minutes — a chest drain in tamponade helps nobody, and a pericardiocentesis in tension pneumothorax is an instrument of harm. Reciting that discrimination, with the ultrasound probe as tie-breaker, is the moment the viva turns.
Frequently asked questions
What are the immediately lethal chest injuries in the primary survey?
Airway obstruction, tension pneumothorax, open pneumothorax, massive haemothorax, flail chest with pulmonary contusion and cardiac tamponade — the "lethal six", each diagnosed clinically and managed before imaging.
When does haemothorax mandate thoracotomy?
More than 1500 mL immediately on drainage, or continued output above roughly 200 mL per hour for two to four hours — thresholds meant to trigger operation before physiology collapses.
How is tension pneumothorax managed in the trauma bay?
Immediate needle decompression — fifth intercostal space anterior axillary line or second space mid-clavicular — followed by a formal intercostal drain. Waiting for radiographic confirmation is a recognised cause of preventable death.
What defines flail chest and how is it treated?
A segment of three or more ribs fractured in two or more places, moving paradoxically with respiration. Treatment centres on epidural analgesia and ventilatory support for failure, with selective rib fixation.
Which wounds raise suspicion of cardiac injury?
Penetrating wounds anywhere in "the box" — clavicles to costal margins between the mid-clavicular lines. Pericardial fluid on ultrasound with unstable physiology mandates operative exploration; pericardiocentesis is only a bridge.
How is blunt thoracic aortic injury diagnosed and treated?
Suspected on deceleration mechanism with a widened mediastinum, confirmed by CT angiography. Most injuries are now treated by thoracic endovascular aortic repair, open repair reserved for unsuitable anatomy.