Details
| Original language | English |
|---|---|
| Pages (from-to) | 1455-1461 |
| Number of pages | 7 |
| Journal | Physica Status Solidi (A) Applications and Materials Science |
| Volume | 211 |
| Issue number | 6 |
| Publication status | Published - 11 Jun 2014 |
Abstract
A self-bending electrode shaft for application in cochlear implants (CI) is presented. It is desired to reduce the distance between the electrode contacts and nerve cells in the modiolus of the inner ear. Therefore a coextrusion and overmolding device to fabricate a novel electrode shaft consisting of an eccentrically positioned hydrogel swelling actuator was established. Finite-element-analysis (FEA) was performed to analyse the self-bending effect in relationship to the applied hydrostatic pressure. The mechanical actuation of a fabricated electrode shaft was tested in vitro by injection of water into the hydrogel. Curving of the electrode shaft was observed. Osmotic pressure in relation to the mass fraction of the swelling polymer inside the hydrogel was calculated.
Keywords
- cochlear implants, coextrusion, hydrogel actuation, overmolding
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Materials Science(all)
- Surfaces, Coatings and Films
- Engineering(all)
- Electrical and Electronic Engineering
- Materials Science(all)
- Materials Chemistry
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In: Physica Status Solidi (A) Applications and Materials Science, Vol. 211, No. 6, 11.06.2014, p. 1455-1461.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Self-bending hydrogel actuation for electrode shafts in cochlear implants
AU - Stieghorst, Jan
AU - Tegtmeier, Katharina
AU - Aliuos, Pooyan
AU - Zernetsch, Holger
AU - Glasmacher, Birgit
AU - Doll, Theodor
N1 - This project is supported by theDeutsche Forschungsgemeinschaft (DFG), Cluster of Excellence‘Hearing4All’ and Lower Austria Life Science grants LS 010-017
PY - 2014/6/11
Y1 - 2014/6/11
N2 - A self-bending electrode shaft for application in cochlear implants (CI) is presented. It is desired to reduce the distance between the electrode contacts and nerve cells in the modiolus of the inner ear. Therefore a coextrusion and overmolding device to fabricate a novel electrode shaft consisting of an eccentrically positioned hydrogel swelling actuator was established. Finite-element-analysis (FEA) was performed to analyse the self-bending effect in relationship to the applied hydrostatic pressure. The mechanical actuation of a fabricated electrode shaft was tested in vitro by injection of water into the hydrogel. Curving of the electrode shaft was observed. Osmotic pressure in relation to the mass fraction of the swelling polymer inside the hydrogel was calculated.
AB - A self-bending electrode shaft for application in cochlear implants (CI) is presented. It is desired to reduce the distance between the electrode contacts and nerve cells in the modiolus of the inner ear. Therefore a coextrusion and overmolding device to fabricate a novel electrode shaft consisting of an eccentrically positioned hydrogel swelling actuator was established. Finite-element-analysis (FEA) was performed to analyse the self-bending effect in relationship to the applied hydrostatic pressure. The mechanical actuation of a fabricated electrode shaft was tested in vitro by injection of water into the hydrogel. Curving of the electrode shaft was observed. Osmotic pressure in relation to the mass fraction of the swelling polymer inside the hydrogel was calculated.
KW - cochlear implants
KW - coextrusion
KW - hydrogel actuation
KW - overmolding
UR - http://www.scopus.com/inward/record.url?scp=84902549148&partnerID=8YFLogxK
U2 - 10.1002/pssa.201330404
DO - 10.1002/pssa.201330404
M3 - Article
AN - SCOPUS:84902549148
VL - 211
SP - 1455
EP - 1461
JO - Physica Status Solidi (A) Applications and Materials Science
JF - Physica Status Solidi (A) Applications and Materials Science
SN - 1862-6300
IS - 6
ER -