PHTLS - Prehospital Trauma Life Support Thoracic Trauma — Questions and Answers
Question 1: What is the hallmark physical finding of a tension pneumothorax?
- Bilateral wheezing
- Unilateral absent breath sounds with hypotension and jugular venous distention (Correct answer)
- Bilateral crackles with productive cough
- Normal breath sounds with mild chest pain
Correct answer: Unilateral absent breath sounds with hypotension and jugular venous distention
Tension pneumothorax classically presents with absent breath sounds on the affected side, hypotension from impaired venous return, and JVD from increased intrathoracic pressure.
This is a CLINICAL diagnosis; do not delay treatment waiting for imaging. Needle decompression of the affected side is the immediate life-saving intervention, followed by chest tube placement at the hospital.
Question 2: How does PHTLS recommend performing needle decompression for tension pneumothorax?
- Insert a 14-gauge needle in the 2nd intercostal space, midclavicular line or 5th intercostal space, anterior axillary line on the affected side (Correct answer)
- Insert a needle in the 4th intercostal space on both sides
- Use a small-gauge butterfly needle in the supraclavicular area
- Only perform with ultrasound guidance
Correct answer: Insert a 14-gauge needle in the 2nd intercostal space, midclavicular line or 5th intercostal space, anterior axillary line on the affected side
PHTLS teaches needle decompression at two acceptable sites: 2nd intercostal space midclavicular line or 5th intercostal space anterior axillary line.
The lateral approach has gained favor because the chest wall is thinner at this location. Technique: use a 14-gauge, 3.25-inch or longer angiocatheter; insert perpendicular to the chest wall just ABOVE the rib to avoid the intercostal neurovascular bundle.
Question 3: What is a flail chest and why is it clinically significant?
- A single rib fracture with minimal displacement
- Two or more ribs fractured in two or more places creating a free-floating segment that impairs ventilation (Correct answer)
- A sternal fracture without rib involvement
- Costochondral separation without respiratory compromise
Correct answer: Two or more ribs fractured in two or more places creating a free-floating segment that impairs ventilation
A flail segment is created when multiple adjacent ribs are fractured at two points, producing a free-floating section that moves paradoxically during breathing.
The paradoxical motion itself is NOT the primary cause of respiratory compromise; the underlying pulmonary contusion is. Management includes high-flow oxygen, positive pressure ventilation if needed, and careful fluid management.
Question 4: What is the appropriate prehospital management of a massive hemothorax?
- Needle decompression of the affected side
- Aggressive fluid resuscitation, high-flow oxygen, and rapid transport to a facility capable of emergency thoracotomy (Correct answer)
- Chest compressions to redistribute the blood
- Elevation of the affected side
Correct answer: Aggressive fluid resuscitation, high-flow oxygen, and rapid transport to a facility capable of emergency thoracotomy
Massive hemothorax requires rapid volume replacement, oxygenation support, and urgent surgical intervention; needle decompression does not address blood accumulation.
Massive hemothorax is defined as >1,500 mL of blood in the pleural space. Clinical findings include absent breath sounds, hypotension, flat neck veins (distinguishes from tension pneumothorax which has JVD), and dullness to percussion.
Question 5: How does PHTLS differentiate between tension pneumothorax and massive hemothorax on physical exam?
- They present identically in all cases
- Tension pneumothorax shows JVD and hyperresonance; massive hemothorax shows flat neck veins and dullness to percussion (Correct answer)
- Only chest X-ray can differentiate them
- Massive hemothorax always has bilateral findings
Correct answer: Tension pneumothorax shows JVD and hyperresonance; massive hemothorax shows flat neck veins and dullness to percussion
Key differentiating features are neck vein status and percussion findings: air causes hyperresonance and JVD while blood causes dullness and flat veins.
Both conditions cause absent breath sounds and hypotension but through different mechanisms. If in doubt about whether to decompress, the risk of untreated tension pneumothorax (death) outweighs the risk of unnecessary needle decompression.
Question 6: What is cardiac tamponade and how is it recognized in the prehospital setting?
- Fluid around the lungs causing breathing difficulty
- Blood accumulation in the pericardial sac compressing the heart, recognized by Beck's triad: JVD, muffled heart sounds, and hypotension (Correct answer)
- Air in the pericardial space from a pneumothorax
- Bruising over the sternum without hemodynamic effects
Correct answer: Blood accumulation in the pericardial sac compressing the heart, recognized by Beck's triad: JVD, muffled heart sounds, and hypotension
Cardiac tamponade occurs when blood fills the pericardial sac, compressing the heart chambers and reducing cardiac output.
Beck's triad is present in only about one-third of cases. Penetrating trauma to the cardiac box with JVD and hypotension should raise high suspicion. Treatment is pericardiocentesis or emergency thoracotomy, which are hospital procedures.
Question 7: What is a pulmonary contusion and how does it affect the trauma patient?
- A laceration of the lung requiring immediate surgery
- Bruising of the lung tissue causing hemorrhage and edema within the alveoli, progressively impairing gas exchange (Correct answer)
- An infection of the lung from aspirated material
- Collapse of the lung from air leak
Correct answer: Bruising of the lung tissue causing hemorrhage and edema within the alveoli, progressively impairing gas exchange
Pulmonary contusion is bruising of lung parenchyma that causes bleeding and edema within the alveoli, progressively impairing oxygenation over 24-48 hours.
Pulmonary contusion is the most common potentially lethal chest injury. Symptoms may be minimal initially but worsen dramatically over 24-48 hours as edema accumulates. Management includes high-flow oxygen and cautious fluid administration.
Question 8: How does PHTLS recommend managing a patient with an open pneumothorax (sucking chest wound)?
- Pack the wound with gauze
- Apply a vented chest seal or three-sided occlusive dressing, monitor for tension pneumothorax development (Correct answer)
- Leave the wound completely open
- Immediately perform needle decompression on the same side
Correct answer: Apply a vented chest seal or three-sided occlusive dressing, monitor for tension pneumothorax development
An occlusive dressing sealed on three sides or commercial vented chest seal creates a flutter valve effect while monitoring for tension development.
If the patient deteriorates after dressing application, suspect conversion to tension pneumothorax and briefly lift the dressing to release pressure, or perform needle decompression. Commercial vented chest seals reduce this risk with built-in valve mechanisms.
Question 9: What thoracic injury should be suspected in a patient who was wearing a seatbelt and has anterior chest bruising with hypotension?
- Simple rib fracture
- Blunt cardiac injury (myocardial contusion) (Correct answer)
- Pneumonia from aspiration
- Chronic heart failure exacerbation
Correct answer: Blunt cardiac injury (myocardial contusion)
Anterior chest bruising from seatbelt impact combined with hemodynamic instability suggests blunt cardiac injury.
The right ventricle, being the most anterior chamber, is most commonly affected. BCI can cause arrhythmias, reduced contractility, valvular disruption, or cardiac rupture. Any significant anterior chest trauma warrants cardiac monitoring during transport.
Question 10: In PHTLS, what is the significance of subcutaneous emphysema found during chest assessment?
- It is a normal finding after CPR
- It indicates air leaking from the respiratory tract into subcutaneous tissues, suggesting pneumothorax, tracheobronchial injury, or esophageal perforation (Correct answer)
- It only occurs with skin infections
- It confirms the patient has COPD
Correct answer: It indicates air leaking from the respiratory tract into subcutaneous tissues, suggesting pneumothorax, tracheobronchial injury, or esophageal perforation
Subcutaneous emphysema indicates air has escaped from the respiratory tract into soft tissues, suggesting significant thoracic injury.
The extent of subcutaneous emphysema often correlates with injury severity. This finding should prompt thorough assessment for pneumothorax and consideration of needle decompression if tension physiology is present.
Question 11: What is the PHTLS approach to managing rib fractures in a trauma patient?
- Bind the chest tightly to immobilize the ribs
- Provide supplemental oxygen, encourage deep breathing, manage pain, and monitor for associated injuries (Correct answer)
- Only treat if more than 3 ribs are fractured
- Rib fractures require no prehospital treatment
Correct answer: Provide supplemental oxygen, encourage deep breathing, manage pain, and monitor for associated injuries
Rib fracture management focuses on oxygenation support, pain management, and monitoring for underlying injuries.
First and second rib fractures suggest high-energy mechanism with risk of great vessel injury. Lower rib fractures (9-12) are associated with liver and spleen injuries. Chest binding is specifically CONTRAINDICATED as it restricts ventilation.
Question 12: According to PHTLS, what immediate action is required for a patient with traumatic cardiac arrest from thoracic penetrating trauma?
- Standard CPR protocol only
- Rapid transport for emergency department thoracotomy, with CPR and bilateral needle decompression en route (Correct answer)
- Termination of resuscitation at the scene
- IV fluid bolus before any other intervention
Correct answer: Rapid transport for emergency department thoracotomy, with CPR and bilateral needle decompression en route
Penetrating thoracic trauma causing cardiac arrest has survivable causes that can only be treated surgically, making rapid transport essential.
Potentially reversible causes include cardiac tamponade, tension pneumothorax, and massive hemorrhage. Emergency department thoracotomy for penetrating cardiac injury has survival rates of 10-30%. Transport should not be delayed for IV access or intubation.
PHTLS - Prehospital Trauma Life Support Thoracic Trauma
What is the hallmark physical finding of a tension pneumothorax?
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