Journal article
Apparatus for simulating dynamic interactions between the spinal cord and soft-coupled intradural implants
Review of scientific instruments, Vol.84(11), pp.114303-114303
11/2013
DOI: 10.1063/1.4831801
PMID: 24289414
Abstract
We have designed, built, and tested an apparatus used for investigating the biomechanical response of a novel intradural spinal cord stimulator to the simulated physiological movement of the spinal cord within the thecal sac. In this apparatus, the rostral-caudal displacements of an anthropomorphic spinal cord surrogate can be controlled with a resolution of approximately 0.1% of a target value for up to 10(7) lateral movement cycles occurring at a repetition rate of 2 Hz. Using this system, we have been able to determine that the restoring force of the stimulator's suspension system works in concert with the frictional coupling between the electrode array and the surrogate to overcome the 0.42 μN inertial force associated with the lateral motion of the array. The result is a positional stability of the array on the surrogate (in air) of better than 0.2 mm over ~500,000 movement cycles. Design modifications that might lead to improved physiological performance are discussed.
Details
- Title: Subtitle
- Apparatus for simulating dynamic interactions between the spinal cord and soft-coupled intradural implants
- Creators
- S Viljoen - Department of Neurosurgery, University of Iowa Hospitals and Clinics, 200 Hawkins Drive, Iowa City, Iowa 52242, USAH OyaC G ReddyB D DalmR ShurigK OddenG T GilliesM A Howard III
- Resource Type
- Journal article
- Publication Details
- Review of scientific instruments, Vol.84(11), pp.114303-114303
- Publisher
- United States
- DOI
- 10.1063/1.4831801
- PMID
- 24289414
- ISSN
- 0034-6748
- eISSN
- 1089-7623
- Language
- English
- Date published
- 11/2013
- Academic Unit
- Neurology; Iowa Neuroscience Institute; Neurosurgery; Otolaryngology
- Record Identifier
- 9984020765602771
Metrics
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