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Difficulty: MediumNeurosurgery

Paramedics rush a 24-year-old male to the trauma bay following a high-velocity car crash. He is comatose upon arrival. Vital signs show a blood pressure of 185/100 mm Hg and a heart rate of 48/min. His Glasgow Coma Scale score is 6 (Eyes 1, Verbal 2, Motor 3). Neurological assessment reveals a left pupil that measures 7 mm and does not react to light, whereas the right pupil is 3 mm and reactive. The patient's right arm and leg exhibit rigid extension when a painful stimulus is applied.

Arrange the following interventions in the optimal chronological order for managing this patient:

  1. 1Perform endotracheal intubation
  2. 2Administer intravenous hypertonic saline
  3. 3Obtain a noncontrast CT scan of the head
  4. 4Perform a decompressive craniotomy

Answer

The correct sequence is: 1) Perform endotracheal intubation, 2) Administer intravenous hypertonic saline, 3) Obtain a noncontrast CT scan of the head, 4) Perform a decompressive craniotomy.
The patient presents with severe traumatic brain injury and signs of impending left uncal herniation (Cushing triad, left blown pupil, right-sided extensor posturing). According to trauma protocols, the immediate priority is to secure the airway via endotracheal intubation, as the patient cannot protect his airway (GCS of 6). Following airway stabilization, the clear clinical signs of herniation require immediate temporizing medical treatment with osmotic therapy (hypertonic saline) to acutely lower intracranial pressure. Only after the airway is secured and medical therapies are initiated should the patient be transported for a noncontrast CT scan of the head to diagnose the underlying lesion. Finally, the definitive treatment for an intracranial mass lesion causing herniation is surgical decompression (craniotomy).

Step-by-Step Solution

1
Evaluate airway and breathing based on ATLS protocols.
Patient has a Glasgow Coma Scale score of 6.
Patients with a GCS of 8 or less require definitive airway management as the absolute first step.
2
Assess for signs of elevated intracranial pressure and herniation.
Patient exhibits Cushing reflex (hypertension, bradycardia) and left uncal herniation (fixed dilated left pupil, right-sided decerebrate posturing).
Clinical signs of herniation mandate immediate temporizing medical therapy to reduce intracranial pressure.
3
Initiate temporizing medical measures for elevated intracranial pressure.
Administer intravenous hypertonic saline or mannitol.
Osmotic therapy draws water out of the brain parenchyma, acutely lowering intracranial pressure and buying time for imaging and surgery.
4
Obtain definitive diagnostic imaging.
Perform a noncontrast CT scan of the head.
Imaging is required to identify the specific cause of herniation (e.g., epidural or subdural hematoma) to plan the surgical approach.
5
Perform definitive treatment.
Decompressive craniotomy and hematoma evacuation.
Surgical removal of the mass lesion is the ultimate treatment to resolve the herniation and prevent irreversible brain damage.

Key Concept

The emergency management of severe traumatic brain injury with impending uncal herniation strictly follows the sequence of: airway protection, medical reduction of intracranial pressure, diagnostic imaging, and definitive surgical decompression.
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Topics

Neurosurgery

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