TNCC Thoracic Trauma 1 — Questions and Answers
Question 1: What is the most common cause of thoracic trauma in adults in the United States?
- Penetrating stab wounds
- Motor vehicle collisions (Correct answer)
- Falls from height
- Blast injuries
Correct answer: Motor vehicle collisions
Motor vehicle collisions are the leading cause of blunt thoracic trauma in the US, accounting for the majority of chest injuries seen in trauma centers.
Question 2: A patient presents with tracheal deviation away from the affected side, absent breath sounds, hypotension, and jugular venous distension. Which condition does this describe?
- Massive hemothorax
- Cardiac tamponade
- Tension pneumothorax (Correct answer)
- Flail chest
Correct answer: Tension pneumothorax
Tension pneumothorax causes air to accumulate under pressure, shifting the mediastinum and trachea away from the affected side while producing obstructive shock.
Question 3: What is the immediate intervention for suspected tension pneumothorax in a rapidly deteriorating patient?
- Chest X-ray confirmation followed by chest tube insertion
- Needle decompression at the second intercostal space, midclavicular line (Correct answer)
- Endotracheal intubation and positive pressure ventilation
- Emergency pericardiocentesis
Correct answer: Needle decompression at the second intercostal space, midclavicular line
Needle decompression is the immediate life-saving intervention for tension pneumothorax; imaging should never delay treatment in a deteriorating patient.
Question 4: Which injury is characterized by paradoxical chest wall movement during respiration?
- Open pneumothorax
- Tension pneumothorax
- Flail chest (Correct answer)
- Pulmonary contusion
Correct answer: Flail chest
Flail chest occurs when three or more consecutive ribs are fractured in two or more places, creating a free-floating segment that moves opposite to the rest of the chest wall.
Question 5: Beck's triad of hypotension, muffled heart sounds, and distended neck veins is the classic presentation of which condition?
- Tension pneumothorax
- Massive hemothorax
- Cardiac tamponade (Correct answer)
- Traumatic aortic injury
Correct answer: Cardiac tamponade
Beck's triad describes cardiac tamponade, in which fluid accumulation in the pericardial sac restricts cardiac filling and reduces cardiac output.
Question 6: What is the correct initial management for an open pneumothorax (sucking chest wound)?
- Immediate chest tube insertion directly at the wound site
- Application of an occlusive dressing sealed on three sides (Correct answer)
- Complete occlusion of the wound with an airtight dressing
- Endotracheal intubation as the only intervention
Correct answer: Application of an occlusive dressing sealed on three sides
A three-sided occlusive dressing allows air to escape on exhalation while preventing entrainment on inhalation, avoiding conversion to a tension pneumothorax.
Question 7: Massive hemothorax is defined as blood accumulation in the pleural space of at least how much?
- 500 mL
- 750 mL
- 1,000 mL
- 1,500 mL (Correct answer)
Correct answer: 1,500 mL
Massive hemothorax is defined as 1,500 mL or more of blood in the pleural space, which causes significant hemodynamic compromise and requires immediate intervention.
TNCC Thoracic Trauma 1
What is the most common cause of thoracic trauma in adults in the United States?