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Related Concept Videos

Increased Intracranial Pressure l: Introduction01:14

Increased Intracranial Pressure l: Introduction

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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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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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Alterations in Blood Pressure01:30

Alterations in Blood Pressure

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Alterations in blood pressure, such as hypertension (high blood pressure) and hypotension (low blood pressure), significantly affect human health. Understanding these conditions' classifications, causes, and symptoms is essential for effective management and treatment.
Hypertension (High blood pressure)
Hypertension occurs when blood pressure readings consistently exceed the normal range. It is diagnosed when systolic blood pressure (the top number, indicating pressure while the heart...
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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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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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Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

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A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
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Updated: Apr 26, 2026

Intracranial Pressure Monitoring In Nontraumatic Intraventricular Hemorrhage Rodent Model
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[Intracranial hypotension].

H Urbach1

  • 1Klinik für Neuroradiologie, Universitätsklinikum Freiburg, Breisacher Str. 64, 79106, Freiburg, Deutschland, horst.urbach@uniklinik-freiburg.de.

Der Nervenarzt
|July 30, 2014
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Summary
This summary is machine-generated.

Intracranial hypotension, often presenting as orthostatic headache, can have atypical symptoms and challenging diagnoses. This review covers clinical signs, imaging, and controversial treatment options for cerebrospinal fluid leaks.

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Area of Science:

  • Neurology
  • Radiology
  • Neurosurgery

Context:

  • Intracranial hypotension presents diagnostic challenges due to variable clinical manifestations.
  • Cerebrospinal fluid (CSF) leaks can cause orthostatic headaches, but also atypical neurological symptoms.
  • Imaging findings, particularly MRI, may not always be definitive for diagnosing CSF leaks.

Purpose:

  • To review the clinical spectrum of intracranial hypotension.
  • To discuss current imaging modalities for identifying CSF leaks.
  • To outline the controversial diagnostic and therapeutic strategies for intracranial hypotension.

Summary:

  • This review details the diverse clinical presentations of intracranial hypotension, ranging from typical orthostatic headaches to unusual neurological deficits.
  • It examines the limitations of cranial and spinal magnetic resonance imaging (MRI) in diagnosing cerebrospinal fluid (CSF) leaks.
  • The article discusses various diagnostic methods like CT myelography and digital subtraction myelography, alongside therapeutic interventions including epidural blood patches, fibrin injections, and surgery.

Impact:

  • Provides a comprehensive overview to aid clinicians in diagnosing and managing intracranial hypotension.
  • Highlights controversies in diagnostic and therapeutic approaches, encouraging further research.
  • Aims to improve patient outcomes by clarifying management strategies for CSF leak-related conditions.