PHTLS - Prehospital Trauma Life Support Thoracic Trauma Questions and Answers — Questions and Answers
Question 1: A 28-year-old male involved in a fight has a single stab wound to the left 4th intercostal space, midclavicular line. He is anxious, with a respiratory rate of 28, heart rate of 120, and BP of 100/78. Breath sounds are diminished on the left. You apply an occlusive dressing. During transport, his anxiety increases, he becomes cyanotic, his heart rate is now 140, and his radial pulses are absent. What is the most appropriate next action?
- Initiate rapid fluid resuscitation.
- Perform needle decompression on the right side of the chest.
- Lift one side of the occlusive dressing. (Correct answer)
- Assist ventilations with a bag-valve mask.
Correct answer: Lift one side of the occlusive dressing.
The patient's initial injury was an open pneumothorax, which was appropriately treated with an occlusive dressing. However, the subsequent rapid deterioration with signs of obstructive shock (increased heart rate, cyanosis, loss of radial pulses) strongly indicates the development of a tension pneumothorax. An occlusive dressing can act as a one-way valve, allowing air to escape the lung into the pleural space but not exit the chest, leading to a buildup of pressure. The immediate treatment is to relieve the tension by lifting a side of the dressing to allow the trapped air to escape, a process sometimes called 'burping' the seal.
Question 2: A 55-year-old female was the unrestrained driver in a frontal motor vehicle collision. She is complaining of severe chest pain and difficulty breathing. Assessment reveals paradoxical motion of the right lateral chest wall. Her breathing is shallow at 32 breaths/minute, and SpO2 is 89%. Which of the following is the most critical initial intervention for this patient?
- Stabilizing the flail segment with a bulky dressing.
- Administering high-flow oxygen and assisting ventilations. (Correct answer)
- Establishing two large-bore IVs for fluid resuscitation.
- Performing a needle decompression of the right chest.
Correct answer: Administering high-flow oxygen and assisting ventilations.
This patient has a flail chest, which is defined by the fracture of two or more adjacent ribs in two or more places, creating a freely floating segment. The primary problem with a flail chest is not the paradoxical motion itself, but the underlying pulmonary contusion and the severe pain that leads to inadequate ventilation and hypoxia. The most critical initial intervention is to support the patient's breathing and improve oxygenation by administering high-flow oxygen and, given her shallow, rapid respirations and low SpO2, assisting ventilations with a bag-valve mask. While analgesia is also crucial, addressing the life-threatening hypoxia is the immediate priority.
Question 3: Which set of findings is most indicative of cardiac tamponade in a trauma patient?
- Flat neck veins, hypertension, and muffled heart sounds.
- Distended neck veins, hypotension, and muffled heart sounds. (Correct answer)
- Paradoxical chest motion, hypotension, and tracheal deviation.
- Absent breath sounds, hypertension, and distended neck veins.
Correct answer: Distended neck veins, hypotension, and muffled heart sounds.
The combination of distended neck veins (jugular venous distention), hypotension, and muffled heart sounds is known as Beck's Triad. This classic triad is highly indicative of cardiac tamponade, a condition where blood accumulates in the pericardial sac, compressing the heart and leading to obstructive shock. The other answer choices combine signs that are not typically associated with cardiac tamponade or are contradictory.
Question 4: A patient with blunt chest trauma becomes progressively harder to ventilate with a bag-valve mask. You note absent breath sounds on the left side, tracheal deviation to the right, and severe hypotension. This clinical picture is most consistent with:
- Massive hemothorax
- Simple pneumothorax
- Flail chest
- Tension pneumothorax (Correct answer)
Correct answer: Tension pneumothorax
The classic signs presented—absent breath sounds on the affected side, tracheal deviation away from the affected side, and hemodynamic compromise (hypotension)—are the hallmark indicators of a tension pneumothorax. This is a life-threatening emergency where air accumulates in the pleural space under pressure, causing lung collapse and mediastinal shift, which compresses the heart and great vessels, leading to obstructive shock. Immediate decompression is required.
Question 5: You are treating a patient with a suspected traumatic aortic injury after a severe deceleration event. The patient is conscious, hypotensive, and tachycardic, with a significant difference in blood pressure between the arms. According to PHTLS principles, what is the primary prehospital management goal for this patient's blood pressure?
- Aggressively administer fluids to achieve a systolic BP above 120 mmHg.
- Withhold all fluids to prevent clot dislodgement.
- Administer nitroglycerin to reduce cardiac afterload.
- Maintain a state of permissive hypotension with a target systolic BP of 80-90 mmHg. (Correct answer)
Correct answer: Maintain a state of permissive hypotension with a target systolic BP of 80-90 mmHg.
In traumatic aortic injury, aggressive fluid resuscitation to a normal or high blood pressure can worsen the tear and increase bleeding. The goal is permissive hypotension, maintaining a systolic blood pressure just high enough to ensure perfusion to vital organs (typically 80-90 mmHg) without exacerbating the injury. This is balanced with controlling the heart rate, often with beta-blockers in the hospital setting, to reduce aortic wall shear stress. Nitroglycerin is contraindicated as it can cause reflex tachycardia.
Question 6: When treating an open pneumothorax (sucking chest wound), which of the following is the most appropriate initial action?
- Insert a chest tube at the wound site.
- Pack the wound with sterile gauze.
- Apply a vented or three-sided occlusive dressing. (Correct answer)
- Immediately perform needle decompression adjacent to the wound.
Correct answer: Apply a vented or three-sided occlusive dressing.
The immediate management for an open pneumothorax is to cover the wound with a vented or three-sided occlusive dressing. This allows air to escape from the pleural space during exhalation but prevents air from entering during inhalation, effectively converting the open pneumothorax into a simple, closed pneumothorax and preventing the development of a tension pneumothorax. Packing the wound is ineffective, and chest tube insertion and needle decompression are subsequent or different interventions not indicated as the first step for this specific injury.
PHTLS - Prehospital Trauma Life Support Thoracic Trauma Questions and Answers
A 28-year-old male involved in a fight has a single stab wound to the left 4th intercostal space, midclavicular line.
He is anxious, with a respiratory rate of 28, heart rate of 120, and BP of 100/78.
Breath sounds are diminished on the left.
You apply an occlusive dressing.
During transport, his anxiety increases, he becomes cyanotic, his heart rate is now 140, and his radial pulses are absent.
What is the most appropriate next action?