Microcatheter device with non-linear bending stiffness

A microcatheter device is disclosed that features an effective axial response, good bending force distribution, and a smooth bending stiffness distribution that minimizes stiffness abrupt changes. A catheter device includes a microfabricated inner shaft having a plurality of gaps and an outer member including a polymeric material disposed within the gaps. The catheter device provides non-linear bending stiffness such that bending becomes more difficult as the bending angle increases. 公开了一种微导管装置，其特征为提供有效的轴向响应、良好的弯曲力分配以及使刚度突变最小化的平滑的弯曲刚度分布。一种导管装置包括具有多个间隙的微制造内轴和包括设置在间隙内的聚合物材料的外部构件。导管装置提供非线性弯曲刚度，使得随着弯曲角度增加，弯曲变得更加困难。