What is the purpose of administering 3% hypertonic saline in a patient with severe traumatic brain injury after a bolus?

What is the purpose of administering 3% hypertonic saline in a patient with severe traumatic brain injury after a bolus?

• A. To reduce intracranial pressure
• B. To alkalinize serum
• C. To promote diuresis
• D. To treat hypotension

Answer: (A)

Reducing intracranial pressure through osmotic therapy is the purpose here. A 3% hypertonic saline solution raises serum osmolality, drawing water out of swollen brain tissue into the vascular space. This reduces brain edema and lowers ICP, which helps improve cerebral perfusion after severe traumatic brain injury. While this hypertonic solution can also help maintain blood pressure by expanding intravascular volume, its primary goal in this scenario is ICP reduction. It does not alkalinize the serum, and promoting diuresis or treating hypotension are not the main reasons for its use in this context.

Reducing intracranial pressure through osmotic therapy is the purpose here. A 3% hypertonic saline solution raises serum osmolality, drawing water out of swollen brain tissue into the vascular space. This reduces brain edema and lowers ICP, which helps improve cerebral perfusion after severe traumatic brain injury. While this hypertonic solution can also help maintain blood pressure by expanding intravascular volume, its primary goal in this scenario is ICP reduction. It does not alkalinize the serum, and promoting diuresis or treating hypotension are not the main reasons for its use in this context.