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Related Concept Videos

Cerebrospinal Fluid01:21

Cerebrospinal Fluid

Cerebrospinal fluid (CSF) is a colorless liquid that flows around the brain and the spinal cord, playing a vital role in the protection, support, and overall function of the central nervous system (CNS). CSF production, circulation, and absorption are tightly regulated processes essential for the brain and spinal cord to function properly.
CSF Production
CSF is produced mainly in the choroid plexus, a network of capillaries and ependymal cells located within the ventricular system of the brain.
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...
Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

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...
Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

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...
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...
Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

Cerebral edema is a pathological increase in brain water content that disrupts intracranial pressure regulation and impairs neurological function. Because the cranial vault is rigid, even modest increases in tissue volume can compromise cerebral perfusion, distort neural structures, and initiate secondary injury. Cerebral edema develops through four principal mechanisms: vasogenic, cytotoxic, interstitial, and ionic.Vasogenic EdemaVasogenic edema arises from disruption of the blood–brain...

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Related Experiment Video

Updated: Jul 4, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
14:59

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus

Published on: October 14, 2022

How does CSF dynamics change after shunting?

G Petrella1, M Czosnyka, N Keong

  • 1Academic Neurosurgical Unit, Addenbrookes Hospital, Cambridge, UK.

Acta Neurologica Scandinavica
|June 3, 2008
PubMed
Summary
This summary is machine-generated.

Shunt placement in hydrocephalus improves cerebrospinal fluid (CSF) dynamics and compensatory reserve. Infusion studies confirm improved CSF circulation and pressure-volume compensation post-surgery, even without dramatic clinical changes.

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In Vivo Imaging of Cerebrospinal Fluid Transport through the Intact Mouse Skull using Fluorescence Macroscopy
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In Vivo Imaging of Cerebrospinal Fluid Transport through the Intact Mouse Skull using Fluorescence Macroscopy

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Last Updated: Jul 4, 2026

Neuronavigation and Laparoscopy Guided Ventriculoperitoneal Shunt Insertion for the Treatment of Hydrocephalus
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The Rabbit Blood-shunt Model for the Study of Acute and Late Sequelae of Subarachnoid Hemorrhage: Technical Aspects
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In Vivo Imaging of Cerebrospinal Fluid Transport through the Intact Mouse Skull using Fluorescence Macroscopy
06:22

In Vivo Imaging of Cerebrospinal Fluid Transport through the Intact Mouse Skull using Fluorescence Macroscopy

Published on: July 29, 2019

Area of Science:

  • Neurosurgery
  • Neurology
  • Cerebrospinal Fluid Dynamics

Background:

  • Hydrocephalus involves complex cerebrospinal fluid (CSF) circulation disturbances impacting cerebral blood flow and metabolism.
  • Shunting aims to correct CSF flow but its full impact on compensatory parameters requires detailed study.

Purpose of the Study:

  • To characterize changes in CSF compensatory parameters in hydrocephalic patients before and after shunting.
  • To assess the effectiveness of shunts in restoring normal CSF dynamics using infusion studies.

Main Methods:

  • Retrospective study of 25 patients with ventriculomegaly and normal pressure hydrocephalus symptoms.
  • Infusion studies to assess shunt function and CSF dynamics parameters including ICP, outflow resistance, elasticity, pressure waves, and compensatory reserve (RAP).
  • Comparison of CSF parameters before and after shunting.

Main Results:

  • Shunting significantly decreased mean intracranial pressure (ICP) and resistance to CSF outflow.
  • All vasogenic pressure waves (pulse, respiratory, B waves) were reduced post-shunting.
  • Compensatory reserve, measured by RAP, significantly improved after shunt placement.

Conclusions:

  • A functioning shunt significantly impacts CSF circulation and pressure-volume compensation.
  • Infusion studies effectively demonstrate the normalization of disturbed CSF dynamics post-shunting.
  • Shunt effectiveness can be confirmed through CSF dynamic parameter improvements, irrespective of dramatic clinical or radiological changes.