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Development of MEMS-based Cerebrospinal Fluid Shunt System

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Abstract

We have developed a micro cerebrospinal fluid (CSF) shunt system with a MEMS-based micro CSF shunt valve. This valve consists of flow nozzles with membrane connected to anchor by bridges. The up-down movement of the membrane turns the CSF on and off, and the thickness and shape of bridges and membrane determine the valve characteristics, such as opening pressure. The membrane, anchor and bridges were made of micro patterned ParyleneTM film. To make the membrane and bridge not be torn out in the CSF flow, we added a cover layer. The total dimension of the assembled CSF shunt valve is 2.5×2.5 mm2, and 0.8 mm in height. The burst pressure and flow rate of the valve were precisely controled by carefully selecting the design parameters, such as the thickness of membrane and bridge, and the width and number of the bridge. The developed CSF shunt system showed good performances in the evaluation test for commercialized CSF shunt systems.

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Authors and Affiliations

  1. Digital Bio Technology Co., Seoul, Korea

    Seok Chung & Jung Kyung Kim

  2. Department of Neurosurgery, Seoul National University Hospital, Korea

    Kyu Chang Wang

  3. School of Mechanical and Aerospace Engineering, Seoul National University, Korea

    Dong-Chul Han

  4. School of Electrical Engineering and Computer Science, Seoul National University, Korea

    Jun-Keun Chang

Authors
  1. Seok Chung
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  2. Jung Kyung Kim
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  3. Kyu Chang Wang
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  4. Dong-Chul Han
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  5. Jun-Keun Chang
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Chung, S., Kim, J.K., Wang, K.C. et al. Development of MEMS-based Cerebrospinal Fluid Shunt System. Biomedical Microdevices 5, 311–321 (2003). https://doi.org/10.1023/A:1027309830365

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  • DOI: https://doi.org/10.1023/A:1027309830365

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