We have used finite-element (FE) modeling to investigate the mechanical compliance, positional stability and contact pressures associated with a novel type of spinal cord stimulator that is placed directly on the pial surface of the spinal cord in order to more selectively activate neural structures for relief of intractable pain. The properties used in the model are those of the actual prototype devices employed in recent in vitro and chronic in vivo tests. The agreement between predictions and experimental observations serves to validate our FE approach, which can now be used to further optimize the device's design and performance.
Finite-Element Study of the Performance Characteristics of an Intradural Spinal Cord Stimulator
Manuscript received March 9, 2014; final manuscript received August 12, 2014; published online October 14, 2014. Assoc. Editor: Rita M. Patterson.
Grosland, N. M., Gillies, G. T., Shurig, R., Stoner, K., Viljoen, S., Dalm, B. D., Oya, H., Fredericks, D. C., Gibson-Corley, K., Reddy, C., Wilson, S., and Howard, M. A., III (October 14, 2014). "Finite-Element Study of the Performance Characteristics of an Intradural Spinal Cord Stimulator." ASME. J. Med. Devices. December 2014; 8(4): 041012. https://doi.org/10.1115/1.4028421
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