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Increased Intracranial Pressure l: Introduction

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...

Hemorrhagic Stroke l: Introduction

Hemorrhagic Stroke l: Introduction

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...

Hemorrhagic Stroke ll: Pathophysiology

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...

Increased Intracranial Pressure ll: Pathophysiology

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...

Cerebral Edema ll: Pathophysiology

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...

Cerebral Edema l: Introduction

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: May 18, 2026

Minimally Invasive Endoscopic Intracerebral Hemorrhage Evacuation

Minimally Invasive Endoscopic Intracerebral Hemorrhage Evacuation

Published on: October 15, 2021

Intracranial hemorrhage.

J Alfredo Caceres¹, Joshua N Goldstein

¹Department of Neurology, Massachusetts General Hospital, Suite 3B, Zero Emerson Place, Boston, MA 01940, USA.

Emergency Medicine Clinics of North America

|September 15, 2012

Summary

This article details the emergency department diagnosis and management of acute nontraumatic intracranial hemorrhage, focusing on intracerebral hemorrhage and subarachnoid hemorrhage.

Area of Science:

Neurology
Emergency Medicine
Neurosurgery

Background:

Intracranial hemorrhage encompasses bleeding within the brain parenchyma or meningeal spaces.
Prompt diagnosis and management are critical for improving patient outcomes.

Purpose of the Study:

To outline the acute diagnostic and management strategies for primary nontraumatic intracerebral hemorrhage.
To provide guidance on the emergency department approach to subarachnoid hemorrhage.

Main Methods:

Review of current literature and clinical guidelines.
Focus on emergency department protocols for initial assessment and stabilization.
Emphasis on neuroimaging and early medical management.

Main Results:

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Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Published on: June 18, 2021

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Last Updated: May 18, 2026

Minimally Invasive Endoscopic Intracerebral Hemorrhage Evacuation

Minimally Invasive Endoscopic Intracerebral Hemorrhage Evacuation

Published on: October 15, 2021

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Pre-Chiasmatic, Single Injection of Autologous Blood to Induce Experimental Subarachnoid Hemorrhage in a Rat Model

Published on: June 18, 2021

Timely identification of hemorrhage type and location is crucial.
Aggressive blood pressure control and reversal of coagulopathy are key interventions.
Neurosurgical consultation is indicated for specific presentations.

Conclusions:

Effective emergency department management of nontraumatic intracranial hemorrhage relies on rapid diagnosis and initiation of appropriate therapies.
Adherence to established protocols can mitigate secondary brain injury and improve prognoses.
Multidisciplinary collaboration is essential for optimal patient care.