Tissue fastner production method and tissue fastener

摘要

A tissue fastener production method of clamping two living tissues together by bringing the two living tissues into close contact includes the following steps: fixing one end of a wire material made of a metal to a shaft body, and winding the wire material around an outer periphery of the shaft body while twisting the wire material round an axis of the wire material, thereby forming a coil on which a predetermined force is exerted in the winding direction; heat treating the wire material to impart superelasticity thereto; and deforming the wire material to which the superelasticity is imparted in a range in which the wire material is elastically deformable, and reversing the winding direction of the coil in a direction reverse to the winding direction of the coil wound in the step of forming the coil so as to obtain an initial tension corresponding to the predetermined force.

主权项

1. A method of producing a tissue fastener which clamps two living tissues into close contact with each other, comprising the steps of:
a first step of fixing one end portion of a wire made of a metal to a shaft body; after the first step, a second step of winding the wire in a predetermined winding direction around an outer periphery surface of the shaft body to form a coil; concurrently with the second step, a third step of twisting a portion of the wire forming the coil around an axis of the wire; after the third step, a fourth step of heat treating the coil to impart superelasticity to the wire forming the coil; and after the fourth step, a fifth step of rewinding at least the portion of the wire that is twisted in a direction reverse to the predetermined winding direction and within an elastically deformable range of the wire to which the superelasticity was imparted in the fourth step.