Magazine type clipping device

Abstract

A magazine type clipping device comprises: clips loaded into a sheath while being engaged with other clips longitudinally connected together; at least one connection ring fitted into the sheath so as to be capable of advancing and retreating, and covering an engagement portion of the clips to maintain the clips in a connected state; and a manipulating wire connected to a rearmost clip and adapted to pull a clip row formed of the plurality of clips, each clip having a pair of openable / closable claw portions and a tail portion, the connection ring having a connection maintaining region retaining a pair of clips engaged with each other, with the pair of claw portions of a succeeding clip being closed while holding the tail portion of a preceding clip.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to an endoscopic clipping device used for stopping bleeding, closing a puncture, etc. in a living body or the like and, in particular, to a magazine type clipping device which allows a plurality of clips to be used in succession.[0002]An endoscopic clipping device causes a clip to protrude from the forward end of an endocope inserted into a living body to pinch a bleeding portion or a portion to be treated after the removal of the lesion tissue with the clip, thereby stopping the bleeding or closing the puncture. In a conventionally used endoscopic clipping device, a single clip is detachably attached to the forward end of a manipulating wire, and each time clipping is performed, the entire sheath is drawn out of the endoscope, and the sheath is loaded with the next clip before being inserted into the endoscope again for the next clipping. In this way, the convention clipping device involves a rather bothersome operation...

AI Technical Summary

Benefits of technology

The present invention provides a magazine type clipping device that can reliably maintain the connected state of clips, prevent damage to the sheath inner wall, and perform clipping operation smoothly and with high precision. The device allows for clamping and separation of the foremost clip by a series of operations in one direction. The device includes a plurality of clips, at least one connection ring, and a manipulating wire. The connection ring can advance and retreat and cover the engagement portion of the clips to maintain them in a connected state. The manipulating wire is connected to a rearmost clip and adapted to pull a clip row formed of the plurality of clips. The connection ring has a connection maintaining region retaining a pair of clips longitudinally engaged with each other, and the engagement portion between the clips is detached from the connection maintaining region through an operation of pulling the manipulating wire to open the pair of clips. The device also has at least one slit extending from a proximal end to a position on the proximal end side of the engagement portion between the clips.

Problems solved by technology

In this way, the convention clipping device involves a rather bothersome operation.

Thus, the connection is rather unstable, and disconnection may occur at the time of insertion into the endoscope or when the devices is passed through a curved portion, or there is the possibility of an excessive force being applied to the connecting portion to cause twisting or distortion in the clips to be used.

Further, there is a fear of projections or corner portions of the clips at the connecting portion damaging the inner wall of the sheath when a curved portion is passed through.

Thus, the clip pulling load is unnecessarily large, and there is a fear of the sheath inner wall being damaged.

However, this connected portion involves play, and hence wobble is generated at the time of advancing / retreating movement, thus giving the operator an unstable feel, and further, a precise control of the advancing / retreating movement is rather difficult to perform.

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