Multi-degree-of-freedom forceps

摘要

A multi-degree-of-freedom forceps includes a insertion portion that has a first bending portion and a second bending portion connected to each other at both ends via an operating member; a treatment portion that is attached to the first bending portion and is used for tissue treatment; and an operating portion that is attached to the second bending portion to bend the second bending portion to thereby bend the first bending portion. The operating portion has a handle body capable of being swung relative to the insertion portion with the second bending portion as an operation center. The handle body has a grip portion that is gripped by a user in use. The grip portion is provided around the operation center or closer to the insertion portion side than the operation center.

主权项

1. A multi-degree-of-freedom forceps system comprising:
a multi-degree-of-freedom forceps comprising:
an insertion portion which is longitudinal, extends along a longitudinal axis, and has a joint portion at a proximal end portion,an operating portion which has a handle body, the handle body being coupled to the joint portion so as to be rotatable in a direction intersecting the longitudinal axis of the insertion portion, and the handle body being provided so as to be capable of swinging and operating relative to the insertion portion,a bending portion which is provided at a distal end portion of the insertion portion so as to be bendable relative to the longitudinal axis of the insertion portion according to a swinging operation of the handle body relative to the insertion portion, anda bending locking mechanism which enables fixation of the rotation of the insertion portion in the direction intersecting the longitudinal axis of the insertion portion relative to the handle body, and release of the fixation; and an access port that is mountable on a body wall, the access port comprising:
a port portion into which the insertion portion is inserted, anda pivot portion that supports the insertion portion so that the insertion portion is movable along the longitudinal axis of the insertion portion, and that supports the insertion portion so that only the insertion portion is pivotally operable relative to the access port, wherein: the pivot portion has a pivot locking mechanism which is capable of locking at least one of a pivot operation of the insertion portion with respect to the access port, and a longitudinal movement of the insertion portion in a direction of the longitudinal axis of the insertion portion, the pivot portion includes:
a first tubular portion that is provided inside the port portion along a longitudinal axis of the pivot portion,a second tubular portion that is connected end-to-end with the first tubular portion in a direction along the longitudinal axis of the pivot portion, anda spherical portion that is disposed between the first tubular portion and the second tubular portion and into which only the insertion portion is inserted, the spherical portion being configured to rotate with respect to the first tubular portion and the second tubular portion so as to be capable of oscillating relative to the port portion, and the operating portion includes a switching operating portion which is connected to the bending locking mechanism and the pivot locking mechanism and which switches the lock or the release of each of the bending locking mechanism and the pivot locking mechanism.