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Related Concept Videos

Increased Intracranial Pressure ll: Pathophysiology01:29

Increased Intracranial Pressure ll: Pathophysiology

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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...
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Increased Intracranial Pressure l: Introduction01:14

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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...
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Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

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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...
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Cerebral Edema l: Introduction01:19

Cerebral Edema l: Introduction

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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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Modeling Posthemorrhagic Hydrocephalus of Prematurity in Rats
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Normal pressure hydrocephalus: a qualitative study on outcome.

Paulo Bugalho1, Luísa Alves1, Olga Ribeiro1

  • 1Neurology Department, Hospital de Egas Moniz.

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|January 8, 2014
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Summary

Shunt surgery improved gait function in normal pressure hydrocephalus (NPH) patients. Younger age and fewer cardiovascular risk factors (CVRF) and white matter lesions (WML) also predicted better gait outcomes.

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Area of Science:

  • Neurology
  • Neurosurgery

Background:

  • Normal pressure hydrocephalus (NPH) is a neurological condition characterized by gait disturbance, cognitive impairment, and urinary incontinence.
  • Understanding the natural history and factors influencing shunt outcomes in NPH is crucial for patient management.

Purpose of the Study:

  • To describe the natural history of NPH.
  • To evaluate shunt outcomes in NPH patients.
  • To identify variables influencing both natural history and shunt outcomes.

Main Methods:

  • A cohort of 35 NPH patients was assessed at two time points (T0 and T1).
  • Motor and cognitive parameters were evaluated.
  • Shunt surgery status was recorded.

Main Results:

  • Thirteen patients underwent shunt surgery.
  • Favorable gait outcome occurred in 5/35 patients, associated with younger age, absence of cardiovascular risk factors (CVRF), white matter lesions (WML), and shunt surgery.
  • Favorable cognitive outcome occurred in 9/35 patients, trending with shunt surgery.
  • Among surgically treated patients, favorable motor outcome correlated with younger age and absence of CVRF and WML.

Conclusions:

  • Shunt surgery significantly improved gait function in NPH patients, with a lesser effect on cognition.
  • Younger age and absence of CVRF and WML were associated with favorable gait outcomes, independent of surgery.