Radially Expansible Stent With Zig-Zag Spiral Struts

The stent is divided into multiple discrete struts arranged in a spiral pattern, where each strut is a separate element that can independently flex and expand. This segmentation allows the stent to maintain overall flexibility while providing distributed radial support force through the individual struts.

The stent design transitions from a simple planar spiral to a three-dimensional configuration with struts extending radially outward. By adding the radial dimension to the spiral geometry, the stent achieves both flexibility in the longitudinal direction and radial expansion capability through the spatial arrangement of struts.

The stent features varying strut densities and configurations at different locations along the spiral. By concentrating struts in specific radial regions and adjusting local geometry, the design achieves adequate diameter while maintaining sufficient stenting force in critical areas through localized structural reinforcement.

The spiral stent employs asymmetric strut arrangement where struts of varying lengths and spacing are positioned at different radial distances. This asymmetric configuration allows the stent to achieve larger diameter while maintaining effective stenting force through optimized strut distribution rather than uniform symmetry.

The zig-zag strut configuration is designed as a dynamic structure that can transition between compressed and expanded states. The struts are arranged to naturally flex and expand radially when deployed, converting the complexity of the zig-zag geometry into a functional dynamic response rather than a static complex structure.

The stent design utilizes changes in geometric parameters such as strut angle, spacing, and curvature to achieve radial expansion. By optimizing these parameters in the zig-zag configuration, the stent achieves effective radial expansion through parameter optimization rather than increasing structural complexity.