Soft-coupling suspension system for an intradural spinal cord stimulator: Biophysical performance characteristics

H. Oya; S. Safayi; N. D. Jeffery; S. Viljoen; C. G. Reddy; B. D. Dalm; J. K. Kanwal; G. T. Gillies; M. A. Howard

doi:10.1063/1.4827195

Soft-coupling suspension system for an intradural spinal cord stimulator: Biophysical performance characteristics

H. Oya, S. Safayi, N. D. Jeffery, S. Viljoen, C. G. Reddy, B. D. Dalm, J. K. Kanwal, G. T. Gillies, M. A. Howard

Academic Institute

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

We have characterized the mechanical compliance of an improved version of the suspension system used to position the electrode-bearing membrane of an intradural neuromodulator on the dorsal pial surface of the spinal cord. Over the compression span of 5 mm, it exhibited a restoring force of 2.4 μN μm^-1 and a mean pressure of 0.5 mm Hg (=66 Pa) on the surface below it, well within the range of normal intrathecal pressures. We have implanted prototype devices employing this suspension and a novel device fixation technique in a chronic ovine model of spinal cord stimulation and found that it maintains stable contact at the electrode-pia interface without lead fracture, as determined by measurement of the inter-contact impedances.

Original language	English (US)
Article number	164701
Journal	Journal of Applied Physics
Volume	114
Issue number	16
DOIs	https://doi.org/10.1063/1.4827195
State	Published - Oct 28 2013

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.4827195

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abstract = "We have characterized the mechanical compliance of an improved version of the suspension system used to position the electrode-bearing membrane of an intradural neuromodulator on the dorsal pial surface of the spinal cord. Over the compression span of 5 mm, it exhibited a restoring force of 2.4 μN μm-1 and a mean pressure of 0.5 mm Hg (=66 Pa) on the surface below it, well within the range of normal intrathecal pressures. We have implanted prototype devices employing this suspension and a novel device fixation technique in a chronic ovine model of spinal cord stimulation and found that it maintains stable contact at the electrode-pia interface without lead fracture, as determined by measurement of the inter-contact impedances.",

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AU - Oya, H.

AU - Safayi, S.

AU - Jeffery, N. D.

AU - Viljoen, S.

AU - Reddy, C. G.

AU - Dalm, B. D.

AU - Kanwal, J. K.

AU - Gillies, G. T.

AU - Howard, M. A.

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AB - We have characterized the mechanical compliance of an improved version of the suspension system used to position the electrode-bearing membrane of an intradural neuromodulator on the dorsal pial surface of the spinal cord. Over the compression span of 5 mm, it exhibited a restoring force of 2.4 μN μm-1 and a mean pressure of 0.5 mm Hg (=66 Pa) on the surface below it, well within the range of normal intrathecal pressures. We have implanted prototype devices employing this suspension and a novel device fixation technique in a chronic ovine model of spinal cord stimulation and found that it maintains stable contact at the electrode-pia interface without lead fracture, as determined by measurement of the inter-contact impedances.

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Soft-coupling suspension system for an intradural spinal cord stimulator: Biophysical performance characteristics

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