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Ventricular volume following third ventriculostomy.

T H Schwartz1, B Ho, C J Prestigiacomo

  • 1Department of Neurological Surgery, The Neurological Institute of New York, Columbia-Presbyterian Medical Center, New York 10032, USA.

Journal of Neurosurgery
|July 2, 1999
PubMed
Summary
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Volumetric measurements using CT scans demonstrate reduced ventricular size within 3 weeks after endoscopic third ventriculostomy. This method aids in assessing surgical success and patient recovery post-procedure.

Area of Science:

  • Neurosurgery
  • Radiology
  • Medical Imaging

Background:

  • Postoperative evaluation of endoscopic third ventriculostomy (ETV) can be challenging due to minimal changes in ventricular size.
  • Non-invasive methods are needed to assess ETV efficacy, especially in patients with unclear clinical responses.

Purpose of the Study:

  • To determine if volumetric measurements from CT scans can detect ventricular size changes after ETV.
  • To assess the correlation between ventricular volume changes and clinical outcomes.

Main Methods:

  • Volumetric analysis of third and lateral ventricles using axial CT scans obtained pre-surgery and at 3 and 21 days post-surgery.
  • Measurements were performed by two independent investigators in 16 patients undergoing ETV for noncommunicating hydrocephalus.

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Main Results:

  • A significant mean decrease of 35% in third ventricular volume and 33% in lateral ventricular volume was observed within 21 days post-ETV.
  • The degree of ventricular volume reduction correlated with the duration of preoperative symptoms.
  • Lateral ventricular measurements demonstrated higher accuracy compared to third ventricular measurements.

Conclusions:

  • Standard CT-based volumetric measurements can effectively demonstrate ventricular volume reduction post-ETV.
  • This technique provides a valuable tool for early postoperative assessment of ETV success.
  • Lateral ventricular volume changes may be more reliable indicators of successful ETV compared to third ventricular changes.