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Cerebrospinal fluid outflow resistance measurements in the selection of patients for shunt surgery in the normal pressure hydrocephalus syndrome. A controlled trial

Acta Neurochirurgica volume 104, pages 48–53 (1990)Cite this article

Summary

In an attempt to determine to what extent the measurement of cerebrospinal fluid (CSF) outflow resistance (Rout) can distinguish patients with normal-pressure hydrocephalus (NPH) who respond to shunt surgery from patients who fail to do so, the authors undertook a controlled trial. Eighteen patients with the diagnosis of NPH entered the study. In connection with the shunt operation all patients who entered the study underwent Rout measurement by means of the pressure-volume index (PVI) method of bolus manipulation (Marmarouet al.). As a safety measure patients above 70 of age and patients with dementia as the only clinical symptom underwent continuous intraventricular pressure measurement before they entered the final study.

As a result a total of fourteen patients underwent PVI test and shunt surgery during the same procedure. Patients with normal Rout thus served as controls, since all patients underwent shunt surgery irrespective of the result of the Rout measurement. Eight patients improved following surgery and the outcome did not correlate with result of PVI nor Rout determinations.

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Affiliations

  1. Departments of Neurosurgery, Neuroradiology and Anaesthesia, Aalborg Sygehus, Aalborg, Denmark

    M. Kosteljanetz M.D., A. -M. Nehen & J. Kaalund

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  1. M. Kosteljanetz M.D.
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  2. A. -M. Nehen
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  3. J. Kaalund
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Kosteljanetz, M., Nehen, A.M. & Kaalund, J. Cerebrospinal fluid outflow resistance measurements in the selection of patients for shunt surgery in the normal pressure hydrocephalus syndrome. A controlled trial. Acta neurochir 104, 48–53 (1990). https://doi.org/10.1007/BF01842893

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  • DOI: https://doi.org/10.1007/BF01842893

Keywords

  • Normal-pressure hydrocephalus
  • resistance to CSF outflow
  • intracranial pressure
  • pressure-volume index