Related Experiment Video
Updated: May 7, 2026
05:01
A Detailed Protocol for Physiological Parameters Acquisition and Analysis in Neurosurgical Critical Patients
Published on: October 17, 2017
[Increased intracranial pressure and brain edema].
1Klinik für Neurologie, Klinikum Nürnberg, Breslauer Str. 201, 90471, Nürnberg, Deutschland.
Der Anaesthesist
|September 25, 2013
Summary
Elevated intracranial pressure (ICP) in brain diseases requires invasive monitoring for detection. Cerebral perfusion pressure (CPP), derived from ICP and mean arterial pressure (MAP), is crucial for assessing brain perfusion.
Area of Science:
- Neurology
- Neurosurgery
- Critical Care Medicine
Context:
- Primary and secondary brain diseases can cause dangerous increases in intracranial pressure (ICP).
- Rising ICP may not present obvious symptoms, especially under sedation, necessitating invasive ICP monitoring.
- Cerebral perfusion pressure (CPP) is a key indicator of brain perfusion, calculated as Mean Arterial Pressure (MAP) minus ICP.
Purpose:
- To highlight the critical role of invasive intracranial pressure (ICP) monitoring in managing brain diseases.
- To emphasize the importance of cerebral perfusion pressure (CPP) in assessing brain perfusion.
- To review existing evidence on various ICP-reducing treatment strategies.
Summary:
- Increased intracranial pressure (ICP) in brain diseases stems from rising volumes of brain tissue, cerebrospinal fluid, or blood.
- Invasive ICP monitoring is essential for detecting elevated ICP, particularly in sedated patients.
- Effective management involves understanding ICP, CPP (MAP-ICP), and evaluating treatments like hyperventilation, hypothermia, and surgery.
Impact:
- Improved detection and management of elevated ICP in critical neurological conditions.
- Enhanced understanding of cerebral perfusion pressure (CPP) for optimizing treatment strategies.
- Informed clinical decision-making regarding ICP-reducing therapies, potentially improving patient outcomes.
Related Concept Videos
01:29Increased 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...
01:14Increased 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...
01:22Cerebral 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...
01:19Cerebral 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...
01:21Cytotoxic 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...
01:26Bacterial Meningitis II: Pathophysiology
Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...