Cerebral Edema

Cerebral edema (from Greek oidema — swelling, edema) is a pathological process characterized by excessive accumulation of fluid in brain tissues. It results in a rapid increase in brain tissue volume and a dangerously high intracranial pressure.

Etiology and pathophysiology

In neurotraumatology, two primary mechanisms of this pathology are identified. Vasogenic edema occurs due to direct mechanical damage to the capillary walls (e.g., brain contusion). In this case, the liquid part of the blood, along with proteins, transudes freely through the vessels into the intercellular space.

Cytotoxic edema develops due to acute oxygen deprivation of cells (ischemia). Due to lack of energy, cell membrane pumps fail. As a result, water rushes directly into the neurons themselves, causing severe swelling and inner destruction. In practice, both mechanisms are triggered simultaneously in severe trauma, mutually exacerbating each other.

Clinical significance

Clinically, edema manifests with agonizing, bursting headaches, repeated vomiting (which offers no relief), visual disturbances, and progressively impaired consciousness up to coma. The primary danger of this condition is the inevitable development of displacement syndrome — physical herniation of the brain into natural cranial openings.

Treatment is carried out exclusively in intensive care settings. It includes strict respiratory control (mechanical ventilation), administration of potent osmotic diuretics for forced fluid removal from the tissue, and deep sedation. In critical cases where medications do not help, neurosurgeons perform emergency decompressive craniectomy.