PreprintCited by 12Neuroscience and Neural EngineeringMuscle activation and electromyography studiesVagus Nerve Stimulation Research

On the Reliability of Chronically Implanted Thin-Film Electrodes in Human Arm Nerves for Neuroprosthetic Applications

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Čvančara, P., Valle, G., Müller, M., Guiho, T., Hiairrassary, A., Petrini, F., Raspopovic, S., Strauss, I. +10 more·2019·bioRxiv (Cold Spring Harbor Laboratory)

Abstract

Direct stimulation of peripheral nerves can successfully provide sensory feedback to amputees while using hand prostheses. Recent clinical studies have addressed this important limitation of current prostheses solutions using different implantable electrode concepts. Longevity of the electrodes is key to success. We have improved the long-term stability of the polyimide-based transverse intrafascicular multichannel electrode (TIME) that showed promising performance in clinical trials by integration of silicon carbide adhesion layers. The TIMEs were implanted in the median and ulnar nerves of three trans-radial amputees for up to six months. Here, we present the characterization of the electrical properties of the thin-film metallization as well as material status post explantationem for the first time. The TIMEs showed reliable performance in terms of eliciting sensation and stayed within the electrochemical safe limits maintaining a good working range with respect to amplitude modulation. After termination of the trials and explantation of the probes, no signs of corrosion or morphological change to the thin-film metallization was observed by means of electrochemical and optical analysis. Damage to the metallization was assigned exclusively to mechanical impacts during explantation and handling. The results indicate that thin-film metallization on polymer substrates is applicable in permanent implant system.

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Authors
Čvančara, P., Valle, G., Müller, M., Guiho, T., Hiairrassary, A., Petrini, F., Raspopovic, S., Strauss, I., Granata, G., Fernandez, E., Rossini, P. M., Barbaro, M., Yoshida, K., Jensen, W., Divoux, J.-L., Guiraud, D., Micera, S., & Stieglitz, T.
Affiliations
  • University of Freiburg (DE)
  • Scuola Superiore Sant'Anna (IT)
  • Institut national de recherche en sciences et technologies du numérique (FR)
  • École Polytechnique Fédérale de Lausanne (CH)
  • Università Cattolica del Sacro Cuore (IT)
  • University of Cagliari (IT)
  • Indiana University – Purdue University Indianapolis (US)
  • Aalborg University (DK)
Corresponding author
Čvančara, P.
Venue
bioRxiv (Cold Spring Harbor Laboratory)
Publisher
openRxiv
Published
2019-05-29
OpenAlex
W2946884562
Cited by
12
References
53
Citations by year
2024: 2 · 2023: 5 · 2022: 2 · 2021: 1 · 2020: 2
Type
posted content
Language
en
Open access
Licence
cc-by-nc-nd
Locations
bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
Funders
  • Fondation Bertarelli
  • European Commission (2007–2013, 602547, FP7 2007-2013, FP7/2007, 611687, HEALTH-2013)
  • FP7 Health (FP7/2007-2013, FP7-HEALTH-2013-INNOVATIO-1 602547)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Physical Sciences › Engineering › Biomedical Engineering › Muscle activation and electromyography studies
  • Life Sciences › Neuroscience › Neurology › Vagus Nerve Stimulation Research
Keywords
thin film electrodes, chronically implanted electrodes, neuroprosthetics, sensory feedback, transradial amputation, prosthetic hand, polyimide electrodes, thin film metallization, explantation, corrosion, median nerve, ulnar nerve, amplitude modulation

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