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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...
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Retinal Detachment Model in Rodents by Subretinal Injection of Sodium Hyaluronate
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Published on: September 11, 2013

Retinal hemorrhage in abusive head trauma.

Alex V Levin1

  • 1Pediatric Ophthalmology and Ocular Genetics, Wills Eye Institute, Suite 1210, 840 Walnut St, Philadelphia, PA 19107, USA. alevin@willseye.org

Pediatrics
|October 6, 2010
PubMed
Summary

Retinal hemorrhage is a key indicator of abusive head trauma in children. Decades of research provide a strong evidence base for its clinical significance and diagnosis, despite ongoing challenges in replicating injury mechanisms.

Area of Science:

  • Ophthalmology
  • Forensic Medicine
  • Pediatrics

Background:

  • Retinal hemorrhage is a critical sign associated with abusive head trauma.
  • Understanding its features is vital for accurate diagnosis and differential diagnosis.
  • Research spans clinical, postmortem, animal, mechanical, and finite element studies.

Purpose of the Study:

  • To review the robust understanding of retinal hemorrhage in abusive head trauma.
  • To emphasize the importance of adequate hemorrhage description for differential diagnosis.
  • To address ongoing challenges and the established evidence base.

Main Methods:

  • Synthesis of clinical, postmortem, animal, mechanical, and finite element research.
  • Analysis of the diagnostic importance and pathophysiology of retinal hemorrhage.

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  • Review of evidence concerning the role of increased intracranial pressure, hypoxia, and impact.

    • Main Results:

    • A comprehensive understanding of retinal hemorrhage in abusive head trauma has been established over 30 years.
    • Adequate description of hemorrhages is crucial for accurate differential diagnosis.
    • Challenges persist in developing biomechanical models replicating injury forces.

    Conclusions:

    • Clinicians can confidently utilize a substantial evidence base when evaluating retinal hemorrhage in suspected child abuse cases.
    • Despite some unresolved questions regarding specific mechanisms, the association is well-supported.
    • The diagnostic significance of retinal hemorrhage in abusive head trauma is firmly established.