What is the primary purpose of an external ventricular drain (EVD) in TBI management?

What is the primary purpose of an external ventricular drain (EVD) in TBI management?

• A. Drain CSF to reduce ICP, monitor ICP, and allow intraventricular administration if needed.
• B. Deliver antibiotics directly to brain.
• C. Increase ICP to maintain perfusion.
• D. Measure brain tissue oxygen tension.

Answer: (A)

An external ventricular drain is used in severe TBI mainly to control dangerous intracranial pressure by draining cerebrospinal fluid, while also providing continuous ICP measurements and a route to deliver medications directly into the ventricles if needed. Draining CSF lowers pressure quickly, which helps prevent secondary brain injury and maintains adequate cerebral perfusion. The connected monitoring setup gives real-time pressure data to guide treatment decisions, such as when to tighten drainage or adjust therapies. Intraventricular administration is a useful capability when targeted drug delivery is required, though that is not the primary purpose of the device. It is not designed to increase ICP, nor to measure brain tissue oxygen tension, which relies on separate monitoring.

An external ventricular drain is used in severe TBI mainly to control dangerous intracranial pressure by draining cerebrospinal fluid, while also providing continuous ICP measurements and a route to deliver medications directly into the ventricles if needed. Draining CSF lowers pressure quickly, which helps prevent secondary brain injury and maintains adequate cerebral perfusion. The connected monitoring setup gives real-time pressure data to guide treatment decisions, such as when to tighten drainage or adjust therapies. Intraventricular administration is a useful capability when targeted drug delivery is required, though that is not the primary purpose of the device. It is not designed to increase ICP, nor to measure brain tissue oxygen tension, which relies on separate monitoring.