Mathematical Synthesis of Compliant Mechanism as Cochlear Implant

  • L. ZentnerEmail author
Conference paper
Part of the Mechanisms and Machine Science book series (Mechan. Machine Science, volume 2)


Cochlear implants can be successfully used to reduce the inner ear profound deafness. The implant is inserted into the inner ear by the surgeon’s hand. Because the cochlea has a spiral-like structure (cochlear duct), the insertion of the implant is often difficult, furthermore the basilar membrane could be easily damaged. One of the aims of our investigation is to develop a mathematical model based on the synthesis method for implants with hydraulic actuation. This hydraulic actuation, which is integrated into the implant, facilitates the insertion of the implant structure to the shape of cochlear duct. Thus, the implant can follow the spiral-shaped cochlear duct without damaging the sensitive tissue of the basilar membrane. Some examples for hydraulic actuated cochlear implants based on compliant mechanisms technology are presented in this paper.


Compliant mechanism Cochlea implant Hydraulic device Mathematical modelling 


  1. 1.
    Marangos, N, Laszig, R.: Cochlear Implants, HNO, Springer-Verlag, Physics and Mystery (1998) 46: pp. 12-26Google Scholar
  2. 2.
    Rau, T.; Eilers, H,; Leinung, M.; Hussong, A.; Lenarz, T.; Majdani, O.: Geometriemodellierung des Innenohres für die Cochlea Implantation – anatomische Variabilität und patientenspezifische Insertionsplanung ; 79. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie. Bonn, 30.04.-04.05.2008 Düsseldorf: German Medical Science GMS Publishing House; (2008)Google Scholar
  3. 3.
    Zentner, L.: Untersuchung und Entwicklung nachgiebiger Strukturen, Ilmenau ISLE Verlag, ISBN 3-932633-77-6, (2003)Google Scholar
  4. 4.
    Zentner, L.; Böhm, V.: On the Classification of Compliant Mechanisms. - In: Proceedings of the EUCOMES 08 / European Conference on Mechanism Science ; 2 (Cassino, Italy) : 2008.09.17-20. - Berlin : Springer (2009), pp. 431-438Google Scholar
  5. 5.
    Zentner, L.; Böhm, V.; Minchenya, V.: On the new reversal effect in monolithic compliant bending mechanisms with fluid driven actuators. - In: Mechanism and machine theory. - Amsterdam [u.a.]: Elsevier Science, Bd. 44 (2009), 5, pp. 1009-1018Google Scholar
  6. 6.
    Zentner, L.; Keskeny. J.; Westhofen, M.; Huba, A.: Hydraulic actuation for the navigation of a cochlear implant. - In: Actuator 2006 / International Conference on New Actuators; 10 (Bremen): 2006.06.14-16. - Bremen: HVG Hanseatische Veranst.-GmbH, Div. Messe Bremen (2006), pp. 980-984Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.Technische Universität IlmenauIlmenauGermany

Personalised recommendations