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Related Concept Videos

Local Anesthetics: Clinical Application as Epidural Anesthesia01:29

Local Anesthetics: Clinical Application as Epidural Anesthesia

Epidural anesthetics are administered in the fat-filled epidural space, the outermost part of the spinal canal. This technique is commonly employed for pain management and anesthesia during lower abdomen and pelvis surgeries or labor and delivery.
Since epidural anesthetics can be infused through an epidural catheter, all types of drugs, including short-acting ones, can be administered. Chloroprocaine and lidocaine are examples of short and long-duration anesthetics, respectively. Bupivacaine...
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A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...
Hemorrhagic Stroke ll: Pathophysiology01:29

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 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...
Cerebral Edema ll: Pathophysiology01:22

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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 barrier loses...
Hemorrhagic Stroke l: Introduction01:17

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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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Related Experiment Video

Updated: May 30, 2026

Accessing the Porcine Brain via High-Speed Pneumatic Drill Craniectomy
04:26

Accessing the Porcine Brain via High-Speed Pneumatic Drill Craniectomy

Published on: July 5, 2024

[Posterior fossa epidural hematoma].

T Papacocea1, A Papacocea, L Dănăilă

  • 1Spitalul de Urgenţă "Sf. Pantelimon" Bucureşti, România.

Chirurgia (Bucharest, Romania : 1990)
|August 23, 2011
PubMed
Summary

Posterior fossa epidural hematomas (PFEH) are rare and dangerous. Prompt CT scans are crucial for diagnosis, as MRI offers limited additional value for these specific hematomas.

Related Experiment Videos

Last Updated: May 30, 2026

Accessing the Porcine Brain via High-Speed Pneumatic Drill Craniectomy
04:26

Accessing the Porcine Brain via High-Speed Pneumatic Drill Craniectomy

Published on: July 5, 2024

Area of Science:

  • Neurosurgery
  • Radiology
  • Emergency Medicine

Background:

  • Posterior fossa epidural hematomas (PFEH) are uncommon intracranial hemorrhages.
  • Their posterior fossa location is associated with a poor prognosis.
  • Nonspecific or subtle symptoms often delay diagnosis.

Purpose of the Study:

  • To highlight the diagnostic challenges and management principles for PFEH.
  • To emphasize the role of imaging in PFEH diagnosis and treatment planning.

Main Methods:

  • Review of clinical presentations and imaging findings in PFEH cases.
  • Discussion of diagnostic imaging modalities, primarily CT.
  • Analysis of treatment strategies, including surgical intervention and monitoring.

Main Results:

  • CT scans are the primary diagnostic tool for PFEH, offering rapid and sufficient information.
  • MRI provides minimal additional benefit in the majority of PFEH cases.
  • Clinical presentation and evolution vary based on the bleeding source.

Conclusions:

  • Early diagnosis via CT and timely surgical intervention are critical for PFEH with mass effect or associated injuries.
  • Close patient monitoring is essential due to the potential for rapid clinical deterioration.
  • Prompt management can improve outcomes for patients with PFEH.