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) |
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Article number | 164701 |
Journal | Journal of Applied Physics |
Volume | 114 |
Issue number | 16 |
DOIs | |
State | Published - Oct 28 2013 |
ASJC Scopus subject areas
- Physics and Astronomy(all)