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J Med Eng Technol. 2012 Nov;36(8):407-10. doi: 10.3109/03091902.2012.712204. Epub 2012 Sep 7.

Spinal canal surrogate for testing intradural implants.

Author information

  • 1Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA. hiroyuki-oya@uiowa.edu

Abstract

We have designed, built and tested an anthropomorphic-scale surrogate spinal canal, for use in preliminary evaluations of the performance characteristics of a novel intradural spinal cord stimulator. The surrogate employs a silicone mock spinal cord with semi-major and semi-minor diameters of 10 and 6 mm, respectively, commensurate with those of actual thoracic-level spinal cord. The axial restoring force provided by the 300 ┬Ám thick silicone denticulate ligament constructs on the mock cord is ~ 0.32 N mm(-1) over a 1.5 mm range of displacement, which is within a factor of 2 of that measured by others in human cadaver specimens. Examples of testing protocols of prototype intradural stimulators that employ this device are discussed.

PMID:
22953718
[PubMed - indexed for MEDLINE]
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