Hydrocephalus pp 422-431 | Cite as

A New Shunt System with Non-Invasive Flow Rate Regulation and Pressure Measurement

  • Takuo Hashimoto
  • Norio Nakamura
  • Toshinori Kanki
  • Hideaki Shimazu
  • Ken-ichi Yamakoshi
  • Masakazu Gondoh
  • Toshiaki Tamai
Conference paper


We have developed a new non-invasive method for the regulation of cerebrospinal fluid (CSF) flow and the measurement of intracranial pressure (ICP) in ventriculo-peritoneal shunt tubes. This method depends on an implantable regulatory device, containing two titanium balls, which controls CSF flow with four settings: off, low, medium, and high. The titanium balls can be moved non-invasively by a neurosurgeon who can regulate the flow of CSF through the slit valves. The pressure measuring device contains a thin silicone dome reservoir. It is possible to measure ICP percutaneously by a collapsing technique, a modification of the coplanar method. The authors suggest a new method of treating hydrocephalus, which is to control CSF flow within the appropriate physiological ICP range by this new shunt system.


Hydrocephalus Ventriculo-peritoneal shunt Cerebrospinal fluid ICP Differential pressure valve 


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Copyright information

© Springer-Verlag Tokyo 1991

Authors and Affiliations

  • Takuo Hashimoto
  • Norio Nakamura
  • Toshinori Kanki
    • 1
  • Hideaki Shimazu
    • 2
  • Ken-ichi Yamakoshi
    • 3
  • Masakazu Gondoh
  • Toshiaki Tamai
    • 4
  1. 1.Department of NeurosurgeryJikei University School of MedicineMinato-ku Tokyo, 105Japan
  2. 2.Department of PhysiologyKyorin University School of MedicineMitaka Tokyo, 181Japan
  3. 3.Institute of Applied ElectricityHokkaido University Sapporo, 060Japan
  4. 4.Japan MDM Ltd.Tokyo, 162Japan

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