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Cerebrospinal fluid (CSF) is a colorless liquid that flows around the brain and the spinal cord, playing a vital role in the protection, support, and overall function of the central nervous system (CNS). CSF production, circulation, and absorption are tightly regulated processes essential for the brain and spinal cord to function properly.
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There are hollow fluid-filled cavities known as ventricles deep inside the human brain. There are two lateral ventricles, one in each cerebral hemisphere, and each has three different projections — the anterior, inferior, and posterior horns visible from the lateral side. A thin membrane called the septum pellucidum separates the two lateral ventricles. The slender third ventricle in the diencephalon is connected to each lateral ventricle via a channel called the interventricular foramen.
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Cerebrospinal fluid dynamics study in communicating hydrocephalus.

Vengalathur Ganesan Ramesh1, Vidhya Narasimhan2, Chandramouli Balasubramanian1

  • 1Department of Neurosurgery, Chettinad Superspeciality Hospital, Chettinad Health City, Kelambakkam, Tamil Nadu, India.

Asian Journal of Neurosurgery
|May 10, 2017
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Summary

A simple bolus lumbar injection test accurately assesses cerebrospinal fluid (CSF) dynamics in communicating hydrocephalus. This method aids in diagnosis and predicting shunt responsiveness, improving patient management.

Keywords:
Bolus lumbar injection testcerebrospinal fluid dynamics studycerebrospinal fluid outflow resistancecommunicating hydrocephalusnormal pressure hydrocephaluspost-meningitic hydrocephalus

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Area of Science:

  • Neurosurgery
  • Neurology
  • Pediatrics

Background:

  • Communicating hydrocephalus presents diagnostic and management challenges.
  • Accurate assessment of cerebrospinal fluid (CSF) dynamics is crucial.

Purpose of the Study:

  • To measure opening pressure (Po), pressure volume index (PVI), and CSF outflow resistance (Rout) in communicating hydrocephalus patients.
  • To evaluate the diagnostic and prognostic value of CSF dynamics using a bolus lumbar injection method.

Main Methods:

  • A study involving 50 patients with communicating hydrocephalus (NPH, post-meningitic, post-traumatic).
  • Utilized an improvised bolus lumbar injection method (MIN method).

Main Results:

  • CSF dynamics correlated with clinico-radiological classification in NPH patients.
  • Accurate prediction of shunt responsiveness (87.5% in NPH, 89.5% in post-meningitic hydrocephalus).
  • Early detection of shunt needs and identification of patients with atrophic ventriculomegaly.

Conclusions:

  • The MIN method is a simple, reliable test for CSF dynamics.
  • CSF dynamics study is valuable for diagnosis and predicting shunt responsiveness in communicating hydrocephalus.
  • This study highlights the utility of CSF dynamics in post-meningitic hydrocephalus and for avoiding unnecessary shunts.