Oya H, Howard M A, Shurig R, Gillies G T
Department of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA.
J Med Eng Technol. 2012 Nov;36(8):407-10. doi: 10.3109/03091902.2012.712204. Epub 2012 Sep 7.
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 µm 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.
我们设计、制造并测试了一个人体比例大小的替代脊髓管，用于对新型硬脊膜内脊髓刺激器的性能特征进行初步评估。该替代物采用了一个硅橡胶模拟脊髓，其长半轴和短半轴直径分别为10毫米和6毫米，与实际胸段脊髓的尺寸相当。300微米厚的硅橡胶齿状韧带结构在模拟脊髓上提供的轴向恢复力在1.5毫米的位移范围内约为0.32牛/毫米，这与其他人在人体尸体标本中测得的值相差不超过两倍。文中讨论了使用该装置的原型硬脊膜内刺激器的测试方案示例。
