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Biomimetic microtexturing for neurosurgical probe surfaces to influence tribological characteristics during tissue penetration

For the development of a novel type of neurosurgical probes, surface texturing and various microstructure geometries were fabricated and investigated as to their tribological properties during penetration of a probe into brain tissue. The surface texture and the penetration mechanism under investiga...

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Bibliographic Details
Published in:Microelectronic engineering 2009-04, Vol.86 (4), p.1515-1517
Main Authors: Schneider, Andreas, Frasson, Luca, Parittotokkaporn, Tassanai, Rodriguez y Baena, Ferdinando M., Davies, Brian L., Huq, S. Ejaz
Format: Article
Language:English
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Summary:For the development of a novel type of neurosurgical probes, surface texturing and various microstructure geometries were fabricated and investigated as to their tribological properties during penetration of a probe into brain tissue. The surface texture and the penetration mechanism under investigation were inspired by the ovipositor of the wood-boring wasp Sirex noctilio. Fabrication techniques for microelectronic mechanical systems (MEMS) were employed to engineer this novel biomimetic neurosurgical probe using SU-8 photoresist, Si, and silicone dispersion. Fin- and tooth-like high-aspect-ratio (HAR) side wall microstructures were produced for the surface texture and subsequently integrated into a needle-type probe made by microstereolithography (MSTL). The assembled needle probe with the SU-8 microstructures was used to determine the different bidirectional resistance force during a probe insertion and extraction into soft tissue (including cadaveric animal brain).
ISSN:0167-9317
1873-5568
DOI:10.1016/j.mee.2009.02.027