Highly flexible stent with sinusoidal pattern

摘要

A stent has circular bodies having a wavy-line pattern and arranged side-by-side and coiled elements 15 arranged between the circular bodies that are adjacent and extending in a spiral manner, and apices on opposite sides of the wavy-line pattern of the circular bodies that are adjacent are connected by way of the coiled elements 15. A knob portion 19 is formed at each apex of the wavy-line pattern, and the knob portion 19 includes an extension portion 19a extending in the axis direction and a semicircle portion 19b formed at a tip of the extension portion, and the coiled element 15 is connected with the knob portion 19. A slit is formed at a part of the extension portion 19a of the knob portion 19, and the slit 21 extends in the axis direction from an inner peripheral portion at the apex of the wavy-line pattern of the circular body.

主权项

1. A highly flexible stent comprising:
a plurality of circular bodies having a wavy-line pattern and arranged side-by-side in an axis direction; and a plurality of coiled elements arranged between the circular bodies that are adjacent and extending in a spiral manner around an axis, wherein all apices on opposite sides of the wavy-line pattern of the circular bodies that are adjacent are connected by way of the coiled elements, wherein a knob portion is formed at each apex of the wavy-line pattern of the circular bodies, the knob portion including an extension portion extending in the axis direction having a width greater than a width of the coiled elements and a tip portion formed at a tip of the extension portion, wherein the coiled element is connected with the knob portion, wherein a slit is formed at a part of the extension portion of the knob portion, the slit extending in the axis direction from an inner peripheral portion at the apex of the wavy-line pattern of the circular body, wherein opposite side edges of the slit are linear, extending in parallel, wherein the tip portion is a semicircle portion of semicircular shape, wherein the coiled element has a curve portion at both ends thereof and the coiled element is connected with the circular body via the curve portion, wherein the curve portion is formed so that a tangential direction of the curve portion at a connecting end at which the coiled element connects with the circular body coincides with the axis direction, and wherein a connecting end at which the apex located at one side in the axis direction of the wavy-line pattern of the circular body connects with the coiled element and a connecting end at which the apex located at the other side in the axis direction of the wavy-line pattern of the circular body connects with the coiled element are offset from the center of the apex to opposite sides in a circumferential direction.