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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...
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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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The cranial and spinal meninges are complex protective structures surrounding the central nervous system (CNS), consisting of the brain and spinal cord. These meninges consist of the dura mater, the arachnoid mater, and the pia mater. They protect the CNS, provide structural support, and aid in circulating cerebrospinal fluid (CSF).
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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...

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Posture and fluids for preventing post-dural puncture headache.

Ingrid Arevalo-Rodriguez1, Agustín Ciapponi, Luis Munoz

  • 1Division of Research, Fundación Universitaria de Ciencias de la Salud, Hospital de San José/ Hospital Infantil de San José, BogotáD.C., Colombia. inarev7@yahoo.com

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Prolonged bed rest does not prevent post-dural puncture headache (PDPH) after lumbar puncture. Fluid supplementation

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Published on: March 26, 2019

Area of Science:

  • Neurology
  • Anesthesiology
  • Evidence-based Medicine

Background:

  • Post-dural puncture headache (PDPH) is a frequent complication following lumbar punctures.
  • Cerebrospinal fluid (CSF) leakage through the dural puncture site is a primary suspected cause.
  • Preventive strategies are essential to mitigate this common side effect.

Purpose of the Study:

  • To evaluate the efficacy of prolonged bed rest and fluid supplementation in preventing PDPH.
  • To assess the impact of various body and head positions during bed rest.
  • To determine if additional fluids can counteract CSF loss post-lumbar puncture.

Main Methods:

  • Systematic review and meta-analysis of randomized controlled trials (RCTs).
  • Searched major databases (Cochrane, MEDLINE, EMBASE, LILACS) up to June 2013.
  • Included trials comparing bed rest vs. mobilization, different positions, and fluid supplementation.

Main Results:

  • Bed rest showed no significant benefit over immediate mobilization in preventing PDPH.
  • No reduction in PDPH incidence, severe PDPH, or any headache was observed with bed rest.
  • Fluid supplementation also did not demonstrate a preventive effect on PDPH onset.

Conclusions:

  • Current evidence from RCTs does not support routine bed rest for PDPH prevention.
  • The effectiveness of fluid supplementation in preventing PDPH requires further investigation.
  • Further research is needed to clarify optimal preventive measures for PDPH.