JP2002360589A - Clipping device for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clipping device for an endoscope which can be manufactured at a low cost, by which excellent indwelling property is obtained by preventing an indwelled clip from coming off simply from an affected part by the action of external force, etc. SOLUTION: In the clipping device for the endoscope in which the clip 2 formed to open and close by deforming the vicinity of a base end connection part 2c by a pair of arm part 2a connected on the side of the base end and a clip-closing ring 6 for keeping the arm parts 2a in a closed state by engaging it with the part 2c of the clip 2 are arranged detachably from a sheath 1 in the vicinity of the tip of the sheath 1, inward protrusions 2g made by embossing and holes 2h generated by forming of the protrusions are formed at each of the pair of arm parts 2a of the clip 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clip device for an endoscope which is used to pass through a treatment tool insertion channel of an endoscope to perform hemostasis, ligation or marking in a body.

[0002]

2. Description of the Related Art In general, a clip device for an endoscope is configured such that a pair of arms of a clip are connected at a base end side, and the arms are opened and closed by deforming the vicinity of the base connection portion. I have.

[0003] A clip closing ring is provided to keep the arm portion of the clip closed by engaging it near the base connecting portion of the clip, and the clip closing ring and the clip are arranged near the distal end of the sheath. Is arranged so as to be detachable from the sheath.

[0004] By operating the operating motion transmitting member inserted through the sheath from the proximal end side of the sheath, the clip closing ring not engaged near the proximal end connecting portion of the clip is engaged with the base of the clip. The clip can be retained in a state where the clip is engaged with the vicinity of the end connection portion so as to sandwich the mucous membrane of the affected part or the like.

[0005]

However, in the state where the mucous membrane of the affected part is simply sandwiched between the arms of the clip, the indwelling force is extremely unstable, and the clip easily falls off due to the action of external force or the like. I will.

In order to solve this problem, there is a clip which has a projection and a protrusion attached to the opposite faces of the arms of the clip to make the opposite face uneven (see Japanese Utility Model Laid-Open No. 60-34810). It takes a lot of man-hours to do
Significant cost increases.

[0007] There is also a clip in which projections are simply applied to opposing surfaces of arms of a clip (Japanese Patent Laid-Open No. 9-289).
No. 989), a sufficient indwelling force cannot be obtained with such a configuration.

Accordingly, the present invention provides a clip device for an endoscope which can be manufactured at low cost, and which does not easily fall off the affected part by the action of external force or the like and which can obtain excellent indwellability. The purpose is to provide.

[0009]

In order to achieve the above object, an endoscope clip device according to the present invention is characterized in that a pair of arms connected on the proximal end deforms the vicinity of the proximal connection. And a clip closing ring that engages near the base end connecting portion of the clip to maintain the arm in a closed state and is detachably disposed near the distal end of the sheath. An operation transmitting member for engaging the clip closing ring, which is not engaged near the proximal connection portion of the clip, near the proximal connection portion of the clip by remote operation from the proximal end of the sheath is inserted into the sheath. In the arranged endoscope clip device, an inward protrusion by punching and a hole formed by the formation of the protrusion are formed on each of a pair of arms of the clip.

The projection may project from the arm of the clip inwardly in the form of a tongue, or the projection may be formed in an annular shape surrounding the hole.

[0011]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows the entire configuration of a clip device for an endoscope according to a first embodiment of the present invention. For example, a clip 2 is disposed at a distal end portion of a flexible sheath 1 made of a tetrafluoroethylene resin tube or the like. Have been.

In FIG. 2, the clip 2 has a portion near the base end accommodated in the distal end of the sheath 1, and has a pair of arms 2a in an open state, and each distal end and an intermediate portion of the arms 2a. The claw-like portion 2b and the protrusion 2g, which are formed to protrude inward from FIG.

An operation unit 20 connected to the proximal end of the sheath 1
The slider 22 is slidably attached to a main body shaft 23 having a finger hook 23a attached to the end, and the proximal cylindrical body 21 of the sheath 1 is slidably disposed independently of the main body shaft 23 and the slider 22. It is configured.

FIG. 1 is an enlarged view of the distal end portion of the sheath 1. In this figure, a clip in a natural state when no external force is applied (ie, a state in which the pair of arms 2a are parallel). 2 is almost completely retracted into the sheath 1.

As shown in FIG. 3, the clip 2 is formed as a single piece by bending a stainless steel plate for a spring, for example, and a claw-shaped portion is formed from each end of a pair of arms 2a. 2b is formed to bend inward and protrude.

Each of the arms 2a of the clip 2 has an inward projection 2g formed by stamping from the outside to the inside.
The hole 2h formed by the formation of the projection is formed by press working or the like.

The projections 2g of this embodiment project inwardly (ie, in opposite directions) from each of the arms 2a of the clip 2 in two rows of, for example, three places. The portion of the stamped mark is a hole 2h.

The base ends of the pair of arms 2a are connected by an α-shaped base connection 2c formed in an annular shape. The base 2c is deformed to form the arms 2a. Opens and closes.

An operation wire 3 which is operated in the axial direction by the above-mentioned slider 22 arranged in the operation section 20 is arranged at the axial position of the sheath 1 so as to be able to advance and retreat in the axial direction. A clip connecting hook 4 that can be disengaged from the clip 2 is attached via a connecting member 5.

As shown in FIG. 4, the clip connecting hook 4 has a U-shaped tip and a clip 2.
Is connected to the clip 2 by engaging with the base end connecting portion 2c.

Accordingly, the engagement of the clip connecting hook 4 with the clip 2 can be released by sending the operation wire 3 slightly forward. However, the engagement with the clip 2 may be released by deforming or breaking the distal end portion of the clip connecting hook 4.

Returning to FIG. 1, a short tubular clip closing ring 6 for deforming the proximal connecting portion 2c of the clip 2 is disposed in the distal end of the sheath 1, and the proximal connecting portion of the clip 2 is provided. The portion 2 c is deformed by being pulled into the clip closing ring 6.

The ring receiving member 8 into which the base end portion of the clip closing ring 6 is removably fitted is connected to the main body shaft 23 of the operating section 20 by a ring extrusion coil 7 made of, for example, a tightly wound coil of stainless steel wire. It is fixed to the tip of.

In the endoscope clip device thus constructed, the sheath 1 is passed through the treatment tool insertion channel of the endoscope (not shown) so that the clip 2 projects forward from the distal end of the sheath 1. Then, the clip closing ring 6 is pushed out from the operation unit 20 side (or the operation wire 3 is pulled from the operation unit 20 side).

Then, the base end connecting portion 2c of the clip 2 is deformed in a state of being drawn into the clip closing ring 6, and as shown in FIG.
a changes to an open state.

In this state, when the affected part is positioned between the pair of arms 2a and the clip closing ring 6 is pushed out from the operation unit 20 side, the base end connecting part 2c is further deformed, and at the same time, the distal end of the clip closing ring 6 is clipped. Two pair of arms 2a
Is pushed from the back side, whereby the pair of arms 2a is closed in parallel, and the nail-like portion 2b is in a state of piercing the mucous membrane of the affected part 100 (see FIG. 5).

Then, the clip connecting hook 4 is detached from the clip 2 and the entire portion on the sheath 1 side is pulled out to the hand side, so that the clip 2 together with the clip closing ring 6 is attached to the affected part 100 as shown in FIG. Detained in a state of biting the mucous membrane.

In this indwelling state, the projection 2g formed on the arm 2a of the clip 2 bites into the mucous membrane,
Since the mucous membrane portion pushed up by the projection 2g digs into the hole 2h, the clip 2 is not affected by external force.
It doesn't drop easily from zero.

FIGS. 6 and 7 show the clip 2 according to a second embodiment of the present invention and the indwelling state. The protrusion 2g is formed in the arm 2a by punching it from outside, for example. Is formed in an annular shape surrounding the hole 2h. Even with such a configuration, the same operation and effect as those of the first embodiment can be obtained.

[0030]

According to the present invention, an inward projection formed by punching and a hole formed by the formation of the projection are formed in each of a pair of arms of the clip, so that the clip during placement can be subjected to external force or the like. By virtue of the action, excellent indwellability can be obtained without easily falling off from the affected part, and it is not necessary to add another member to the arm part, so that it can be manufactured at low cost.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a distal end portion of an endoscope clip device according to a first embodiment of the present invention.

FIG. 2 is an external view showing the entire configuration of the endoscope clip device according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a single clip of the endoscope clip device according to the first embodiment of the present invention;

FIG. 4 is a partial cross-sectional view of the end portion of the clip connecting hook and the clip of the clip device for an endoscope according to the first embodiment of the present invention as viewed from the side facing the arm of the clip.

FIG. 5 is a side cross-sectional view showing the indwelling state of the clip of the endoscope clip device according to the first embodiment of the present invention.

FIG. 6 is a front view of the clip of the clip device for an endoscope according to the second embodiment of the present invention as viewed from the side facing the arm.

FIG. 7 is a side cross-sectional view showing the indwelling state of the clip of the endoscope clip device according to the second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheath 2 Clip 2a Arm part 2c Base end connection part 2g Projection 2h Hole 3 Operation wire (operation operation transmission member) 4 Clip connection hook 6 Clip closing ring 7 Ring pushing coil (operation operation transmission member) 20 Operation part

Claims (3)

[Claims] 1. A clip formed so that a pair of arms connected on the base end side can be opened and closed by deforming the vicinity of the base connection part, and engaging near the base connection part of the clip. A clip closing ring for keeping the arm closed by disposing the clip closing ring near the distal end of the sheath so as to be detachable from the sheath and not engaging the clip near the base coupling portion of the clip An endoscope clip device in which an operation operation transmitting member for engaging a ring near the proximal end connection portion of the clip by remote operation from the proximal end side of the sheath is inserted through the sheath,
An endoscope clip device, wherein an inward projection by punching and a hole formed by forming the projection are formed on each of a pair of arms of the clip. 2. A clip device for an endoscope according to claim 1, wherein said projection projects in a tongue shape inward from an arm portion of said clip. 3. An endoscope clip device according to claim 1, wherein said projection is formed in an annular shape surrounding said hole.