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Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
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Intracranial hypertension is a sustained elevation of intracranial pressure (ICP) above 22 mm Hg. In supine adults, normal ICP is ~7–15 mm Hg.The rigid, nonexpandable cranium contains three components—brain tissue, blood, and cerebrospinal fluid (CSF)—that total ~1,700 mL in a typical adult: 1,400 mL brain (~80%), 150 mL blood (~10%), and 150 mL CSF (~10%). According to the Monro–Kellie doctrine, total intracranial volume is effectively fixed. When one component expands, CSF and venous blood...
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Increased intracranial pressure (ICP) refers to a potentially life-threatening rise in pressure inside the skull. This usually happens when there is a major change in the volume of brain tissue, blood, or cerebrospinal fluid (CSF) — the three components inside the skull. According to the Monro-Kellie doctrine, if the volume of one component increases, the volumes of the other components must decrease to maintain normal pressure. If this does not happen, ICP rises.The process often begins with...
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Related Experiment Video

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Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
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Hydrocephalus in aqueductal stenosis.

Giuseppe Cinalli1, Pietro Spennato, Anna Nastro

  • 1Department of Pediatric Neurosurgery, Santobono Children's Hospital, Via Mario Fiore n. 6, 80129 Naples, Italy. giuseppe.cinalli@gmail.com

Child'S Nervous System : Chns : Official Journal of the International Society for Pediatric Neurosurgery
|September 20, 2011
PubMed
Summary

Endoscopic third ventriculostomy is the primary treatment for aqueductal stenosis, a common cause of cerebrospinal fluid blockage. Further research is needed on treatment failures and long-term outcomes, especially in infants.

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Area of Science:

  • Neurosurgery
  • Pediatric Neurology
  • Medical Imaging

Background:

  • Aqueductal stenosis is a frequent cause of cerebrospinal fluid (CSF) blockage within the brain's ventricles.
  • This condition leads to hydrocephalus, characterized by specific clinical and neuroradiological features.
  • Understanding these specific aspects is crucial for effective management.

Purpose of the Study:

  • To review the etiologic, pathogenetic, clinical, and neuroradiological aspects of hydrocephalus secondary to aqueductal stenosis.
  • To analyze therapeutic options, prognosis, and intellectual outcomes.
  • To evaluate the role of modern neuroradiologic techniques in treatment selection.

Main Methods:

  • Extensive literature review was conducted.
  • The review encompassed etiologic, pathogenetic, clinical, and neuroradiological data.
  • Therapeutic options, prognosis, and intellectual outcomes were also systematically reviewed.

Main Results:

  • Modern neuroradiologic interpretation aids in choosing between third ventriculostomy and shunting.
  • Endoscopic third ventriculostomy (ETV) has emerged as the preferred first-line treatment for aqueductal stenosis.
  • However, specific challenges persist regarding treatment failures and long-term outcomes.

Conclusions:

  • ETV is the current standard of care for aqueductal stenosis.
  • Unanswered questions remain concerning ETV failure causes in selected patients.
  • Long-term outcomes in infants and the impact of persistent ventriculomegaly on neurodevelopment require further investigation.