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Related Concept Videos

Increased Intracranial Pressure ll: Pathophysiology01:29

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...
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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...
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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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Dural puncture-induced intracranial hypotension causing diplopia.

Padmaja Sudhakar1, Jonathan D Trobe, Jeffrey Wesolowski

  • 1Department of Ophthalmology and Visual Science, University of Michigan, Ann Arbor, Michigan, USA.

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Diplopia after epidural catheter placement may signal intracranial hypotension. Recognizing diagnostic challenges like delayed symptoms or alternative diagnoses is crucial for accurate patient management and avoiding unnecessary procedures.

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Area of Science:

  • Neurology
  • Pain Management
  • Radiology

Background:

  • Post-epidural catheter placement, diplopia is often linked to sixth nerve palsy from intracranial hypotension.
  • Diagnostic challenges in this clinical scenario are not well-documented.

Purpose of the Study:

  • To identify factors that complicate the diagnosis of intracranial hypotension-induced diplopia following epidural catheter use.

Main Methods:

  • A retrospective review of six cases over five years at a tertiary care center.

Main Results:

  • Six diagnostic confounders were identified: unawareness of epidural catheter, delayed diplopia reporting, subtle deficits, absence of headache, alternative clinical presentations, and inconclusive neuroimaging.
  • These factors can obscure the diagnosis of dural puncture-induced intracranial hypotension.

Conclusions:

  • Clinicians must be aware of diagnostic confounders for post-operative diplopia potentially caused by epidural-induced intracranial hypotension.
  • Accurate diagnosis prevents misinterpretation as pachymeningitis and avoids potentially harmful lumbar punctures.