osmotherapy
Treatment strategy using hyperosmolar agents to reduce brain water content and intracranial pressure.
Full Definition
Osmotherapy is a therapeutic approach in neurocritical care that involves the administration of hyperosmolar substances to create an osmotic gradient that draws water out of brain tissue, thereby reducing cerebral edema and intracranial pressure. Common osmotic agents include mannitol, hypertonic saline, and glycerol. The treatment is based on the principle that intact blood-brain barrier regions will respond to osmotic gradients, while damaged areas may not. Careful monitoring of serum osmolality and electrolytes is essential to prevent complications such as renal dysfunction or rebound cerebral edema.
Usage
Usage note: Distinguish from general diuretic therapy; osmotherapy specifically refers to hyperosmolar agents.
In Context
- "The neurointensivist initiated osmotherapy with hypertonic saline to manage the patient's refractory intracranial hypertension." — clinical progress note
- "Guidelines recommend osmotherapy as a first-line intervention for elevated ICP in traumatic brain injury." — treatment protocol