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Power and signal transmission protocol for a contactless subdural spinal cord stimulation device

Power and signal transmission protocol for a contactless subdural spinal cord stimulation device
Power and signal transmission protocol for a contactless subdural spinal cord stimulation device
Wireless signal transmission will play a critical role in developing reliable subdural spinal cord stimulation systems. We have developed an approach to inductively coupling signals across the epidural spacing between the pial and epidural surfaces. The major design constraints include tolerance of coil misalignments from spinal cord geometries in addition to reasonable power efficiencies within the expected range of movement. The design of the primary side as a driving circuit is simplified by several turns of commercial magnetic wire, whereas the implanted secondary side is implemented in a micro-planar spiral coil tuned to a resonant frequency of 1.6 MHz. We present the results of wireless inductive coupling experiments that demonstrate the ability to transmit and receive a frequency modulated 1.6 MHz carrier signal between primary and secondary coil antennae scaled to 10 mm. Power delivery is in the range of 400 mW at a link efficiency of 32 % for strong coupling (coil separations of 0.5 mm ) and in the range of 70 mW at 4 % efficiency for weak coupling (coil separations of 10 mm).
spinal cord, stimulation, transcutaneous, wireless, signal transmission
1387-2176
27-36
Song, Suk-Heung
376b7d38-508c-4d77-a213-4ea5bc584d9c
Gillies, George T.
da76e515-9215-469d-82a4-911492c8fef4
Howard, Matthew A.
b02147c5-1c4f-4aba-8503-f3b6ea8dc166
Kuhnley, Brian
2fc6cefb-0cb1-4717-b3b9-5c2dcfc38933
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b
Song, Suk-Heung
376b7d38-508c-4d77-a213-4ea5bc584d9c
Gillies, George T.
da76e515-9215-469d-82a4-911492c8fef4
Howard, Matthew A.
b02147c5-1c4f-4aba-8503-f3b6ea8dc166
Kuhnley, Brian
2fc6cefb-0cb1-4717-b3b9-5c2dcfc38933
Utz, Marcel
c84ed64c-9e89-4051-af39-d401e423891b

Song, Suk-Heung, Gillies, George T., Howard, Matthew A., Kuhnley, Brian and Utz, Marcel (2013) Power and signal transmission protocol for a contactless subdural spinal cord stimulation device. Biomedical Microdevices, 15 (1), Spring Issue, 27-36. (doi:10.1007/s10544-012-9684-1).

Record type: Article

Abstract

Wireless signal transmission will play a critical role in developing reliable subdural spinal cord stimulation systems. We have developed an approach to inductively coupling signals across the epidural spacing between the pial and epidural surfaces. The major design constraints include tolerance of coil misalignments from spinal cord geometries in addition to reasonable power efficiencies within the expected range of movement. The design of the primary side as a driving circuit is simplified by several turns of commercial magnetic wire, whereas the implanted secondary side is implemented in a micro-planar spiral coil tuned to a resonant frequency of 1.6 MHz. We present the results of wireless inductive coupling experiments that demonstrate the ability to transmit and receive a frequency modulated 1.6 MHz carrier signal between primary and secondary coil antennae scaled to 10 mm. Power delivery is in the range of 400 mW at a link efficiency of 32 % for strong coupling (coil separations of 0.5 mm ) and in the range of 70 mW at 4 % efficiency for weak coupling (coil separations of 10 mm).

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More information

Published date: February 2013
Keywords: spinal cord, stimulation, transcutaneous, wireless, signal transmission
Organisations: Magnetic Resonance

Identifiers

Local EPrints ID: 354753
URI: https://eprints.soton.ac.uk/id/eprint/354753
ISSN: 1387-2176
PURE UUID: 63f6c778-6160-445f-8dfb-b9e10ed21d2f
ORCID for Marcel Utz: ORCID iD orcid.org/0000-0003-2274-9672

Catalogue record

Date deposited: 22 Jul 2013 10:59
Last modified: 20 Jul 2019 00:40

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Contributors

Author: Suk-Heung Song
Author: George T. Gillies
Author: Matthew A. Howard
Author: Brian Kuhnley
Author: Marcel Utz ORCID iD

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