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Cerebral Edema l: Introduction01:19

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

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Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
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[Macular edema without fluorescein leakeage].

D Gaucher1, M Saleh, A Sauer

  • 1Service d'ophtalmologie, Université Louis Pasteur, Nouvel Hôpital Civil, Strasbourg, France. david.gaucher@chru-strasbourg.fr

Journal Francais D'Ophtalmologie
|September 23, 2009
PubMed
Summary

Optical coherence tomography (OCT) revealed macular thickening without fluorescein leakage in unexplained macular edema cases. These findings suggest potential links to idiopathic retinoschisis or atypical fluid accumulation mechanisms.

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Area of Science:

  • Ophthalmology
  • Retinal Imaging
  • Diagnostic Technologies

Background:

  • Macular edema typically presents with fluorescein leakage on angiography.
  • Unexplained macular edema necessitates investigation into alternative diagnostic features and underlying causes.

Observation:

  • This study examined three patients with unexplained unilateral macular thickening identified via optical coherence tomography (OCT).
  • Patients underwent OCT, angiography, and electrophysiological testing.
  • No fluorescein leakage was observed during angiography.

Findings:

  • OCT imaging revealed features consistent with myopic foveoschisis or X-linked retinoschisis.
  • Electrophysiological tests were largely normal, with one instance of impaired electrooculogram.

Implications:

  • Macular edema lacking angiographic leakage may indicate unilateral idiopathic retinoschisis.
  • Atypical intraretinal fluid accumulation mechanisms should be considered in such cases.
  • OCT is crucial for diagnosing these conditions when angiography is inconclusive.