Patent ID: 9687238
Date: 2017-06-27
CPC Classifications: A61B

Claim:
1. An implant placement device used to place an implant formed of a coil-shaped metal wire into a tissue, the implant placement device comprising: a tubular member which has a lumen extending along a longitudinal axis of the tubular member such that the implant is disposed in a stretched state and an opening formed by communicating with the lumen; a stylet which is provided in the lumen so as to be movable in the lumen in a direction along the longitudinal axis in order to push the implant out of the tubular member; a sheath which is tubular, and provided so as to be rotatable around the longitudinal axis, and into which the tubular member is inserted; an operating body which is formed in an approximately tubular shape and provided at a proximal side of the sheath, wherein the operating body includes: a rotation interlocking mechanism which is provided to couple and rotate the stylet operating part and the sheath operating part around the longitudinal axis; a rotation input portion which is provided to be rotatable with respect to the operating body; a coupling portion which is formed at a distal end of the stylet, which is detachably coupled with a proximal end part of the implant, and which moves along with the stylet and the proximal end part of the implant in the direction along the longitudinal axis and is rotated around the longitudinal axis in accordance with the manipulation of the rotation input portion; and a notch which is provided at a distal end of the sheath, the notch being capable of accommodating at least part of the implant, the notch having an engaging surface to engage with the at least part of the implant in a state where the opening of the tubular member is located inside the sheath, wherein the notch is formed at a position such that the implant in a stretched state is capable of being engaged with both the notch and the coupling portion when the opening of the tubular member is located inside the sheath and the coupling portion is located inside the tubular member, wherein when the rotation input portion is rotated around the longitudinal axis, the sheath and the stylet are rotated in synchronization with each other around the longitudinal axis such that a circumferential relative positional relationship of the sheath, the stylet, and the implant is retained, and the stylet is moved toward the distal end of the sheath in the direction along the longitudinal axis by the rotation of the rotation input portion.