A series of patients arrive at the trauma bay following various traumatic incidents. Match… — USMLE Step 2 CK

A series of patients arrive at the trauma bay following various traumatic incidents. Match each patient's clinical presentation with the most appropriate next step in management according to Advanced Trauma Life Support (ATLS) protocols.

A 45-year-old man with blunt chest trauma exhibits paradoxical inward movement of the right chest wall during inspiration, accompanied by severe hypoxia and respiratory distress.Endotracheal intubation and mechanical ventilation with positive pressure
A 32-year-old woman with a stab wound to the left hemithorax undergoes tube thoracostomy, which immediately drains $1,700\text{ mL}$ of frankly bloody fluid.Immediate transfer to the operating room for an urgent exploratory thoracotomy
A 28-year-old man with a penetrating injury to the left parasternal chest presents with a systolic blood pressure of $75\text{ mm Hg}$ , distended neck veins, and distant heart sounds.Bedside ultrasound evaluation followed by urgent pericardial decompression
A 22-year-old man with a close-range shotgun wound presents with a $5\text{ cm}$ bubbling defect in the lateral chest wall that audibly equilibrates air with each breath.Application of a sterile, three-sided occlusive dressing and subsequent tube thoracostomy

Answer

Flail chest requires intubation and positive pressure ventilation; massive hemothorax requires urgent thoracotomy; cardiac tamponade requires ultrasound and pericardial decompression; open pneumothorax requires a three-sided occlusive dressing.

According to ATLS protocols, life-threatening thoracic injuries must be identified and treated rapidly. Severe flail chest with hypoxia is managed with positive pressure ventilation to physically stabilize the chest wall from the inside. Massive hemothorax, defined by

>1,500\text{ mL}

of immediate chest tube drainage, requires surgical exploration via thoracotomy to achieve direct hemostasis. Cardiac tamponade classically presents with Beck's triad and necessitates immediate pericardial decompression. An open pneumothorax requires immediate closure with a three-sided occlusive dressing to restore an appropriate pressure gradient, followed by a chest tube placed at a separate, sterile site.

Step-by-Step Solution

Analyze the patient with paradoxical chest wall motion.

Identified as a flail chest with respiratory failure.

Flail chest disrupts normal ventilatory mechanics; severe cases with hypoxia require mechanical ventilation for internal stabilization.

Evaluate the chest tube output in the stab wound patient.

The output of

1,700\text{ mL}

confirms a massive hemothorax.

ATLS guidelines mandate urgent thoracotomy for initial chest tube output

>1,500\text{ mL}

due to the high likelihood of major vessel or cardiac injury.

Assess the hemodynamics of the parasternal stab wound patient.

Beck's triad is present, indicating cardiac tamponade.

Pericardial blood accumulation restricts cardiac filling; immediate ultrasound and decompression are lifesaving.

Identify the pathology of the bubbling chest wall defect.

Diagnosed as an open pneumothorax.

The defect allows air to bypass the trachea. A three-sided dressing prevents air entry during inspiration while allowing air to escape during expiration.

Key Concept

Management of life-threatening thoracic trauma (ATLS primary survey)

Estimated Time:1m 30s

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