Examkin

Question

Difficulty: MediumNeurosurgery

A 28-year-old man is brought to the emergency department by ambulance after a high-speed motorcycle collision. He was not wearing a helmet. On arrival, he is unresponsive with irregular, shallow respirations. His blood pressure is 185/105 mm Hg, and his pulse is 52/min. Neurologic examination reveals a 7-mm, nonreactive right pupil and a 3-mm, reactive left pupil. He exhibits decerebrate posturing on the left side in response to painful stimuli. Arrange the following steps in the most appropriate sequential order for the acute management of this patient.

  1. 1Perform endotracheal intubation and provide mechanical ventilation
  2. 2Administer intravenous hyperosmolar therapy (e.g., mannitol)
  3. 3Obtain an emergent non-contrast computed tomography scan of the head
  4. 4Transport the patient to the operating room for surgical decompression

Answer

The correct sequence is: (1) Perform endotracheal intubation, (2) Administer intravenous hyperosmolar therapy, (3) Obtain an emergent non-contrast head CT, (4) Transport to the operating room for surgical decompression.
In the management of severe traumatic brain injury, the Advanced Trauma Life Support (ATLS) protocol dictates that the primary survey (Airway, Breathing, Circulation) must be addressed first. This patient's Glasgow Coma Scale score is low, and he has irregular respirations, mandating immediate endotracheal intubation to secure the airway and control ventilation. Once the airway is secured, his clinical presentation of Cushing triad (hypertension, bradycardia, irregular respirations), a unilateral blown pupil, and decerebrate posturing indicates active brain herniation. This requires immediate temporizing medical therapy, such as intravenous mannitol or hypertonic saline, to acutely lower intracranial pressure. Only after these stabilizing measures are instituted should the patient be transported for a non-contrast CT scan of the head to localize the intracranial hemorrhage. Finally, based on the CT findings, the definitive treatment is neurosurgical evacuation in the operating room.

Step-by-Step Solution

1
Assess the primary survey (Airway, Breathing, Circulation).
The patient is unresponsive with irregular, shallow respirations, necessitating immediate airway protection.
Airway compromise is the most rapid cause of death in severe trauma. A definitive airway must be established before addressing neurological issues.
2
Identify clinical signs of elevated intracranial pressure and impending herniation.
The patient exhibits Cushing triad (hypertension, bradycardia, irregular respirations), a blown pupil, and decerebrate posturing.
These are classic signs of uncal herniation, a life-threatening neurologic emergency requiring immediate medical intervention to reduce intracranial pressure.
3
Initiate medical management for intracranial hypertension.
Administer mannitol or hypertonic saline, and consider brief hyperventilation.
Temporizing measures create a window of opportunity to safely transport the patient out of the resuscitation bay for diagnostic imaging.
4
Obtain diagnostic neuroimaging.
Perform a non-contrast CT scan of the head.
A CT scan rapidly identifies the etiology of the elevated intracranial pressure, such as an epidural or subdural hematoma, which dictates the surgical approach.
5
Proceed to definitive management.
Transport the patient to the operating room.
Surgical decompression or hematoma evacuation is the definitive treatment to resolve the underlying cause of the brain herniation.

Key Concept

The acute management of severe traumatic brain injury with impending herniation follows a strict sequence: secure the airway, institute temporizing medical measures for elevated intracranial pressure, obtain neuroimaging, and proceed to surgical decompression.
Rate this question

Topics

Neurosurgery

More questions from this topic