JP4836353B2 - Endoscopic clip device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope clip device that is used through a treatment instrument insertion channel of an endoscope to perform hemostasis, ligation, marking, or the like in the body.
[0002]
[Prior art]
In general, a clip device for an endoscope is configured such that a pair of arm portions of a clip are connected on the base end side, and the arm portions are opened and closed by deforming the vicinity of the base end connection portion.
[0003]
In addition, a clip closing ring is provided that keeps the arm of the clip closed by engaging the vicinity of the proximal end coupling portion of the clip, and the clip closing ring and the clip are located near the distal end of the sheath from the sheath. It is arranged to be removable.
[0004]
Then, by operating the operation movement transmitting member inserted and disposed in the sheath from the proximal end side of the sheath, the clip closing ring not engaged with the vicinity of the proximal end coupling portion of the clip is connected to the proximal end coupling portion of the clip. The clip can be placed in a state where it is engaged in the vicinity and the mucous membrane of the affected area is sandwiched.
[0005]
[Problems to be solved by the invention]
In the conventional endoscope clip device configured as described above, when an external force is applied to the indwelling clip closed by the clip closing ring, the clip closing ring is detached from the clip, and as a result, the clip is removed. It was not uncommon to fall off the mucous membrane.
[0006]
Therefore, an object of the present invention is to provide an endoscopic clip device in which the clip closing ring is difficult to come off from a clip in an indwelling state and excellent indwellability can be obtained.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the clip device for an endoscope of the present invention has a clip formed so that a pair of arms connected at the base end side open and close by deforming the vicinity of the base end connecting portion. And a clip closing ring that keeps the arm closed by engaging in the vicinity of the proximal end coupling portion of the clip is disposed in the vicinity of the distal end of the sheath so as to be detachable from the sheath. Endoscopic clip device in which an operation motion transmitting member for engaging a clip closing ring in an unengaged state near the proximal end coupling portion of the clip by remote operation from the proximal end side of the sheath is inserted in the sheath The clip closing ring is formed with a check stopper that prevents the clip closing ring from being released when the clip closing ring is engaged with the clip.
[0008]
The check stopper is a small-diameter portion formed on the inner peripheral surface of the rear end portion of the clip closing ring, and spreads at a position where the proximal end connecting portion of the clip passes through the small-diameter portion in a state where it is crushed by elastic deformation. Accordingly, the engagement between the clip closing ring and the clip may be difficult to release.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the overall configuration of the endoscope clip device, in which a clip 2 is disposed at the distal end portion of a flexible sheath 1 made of, for example, a tetrafluoroethylene resin tube.
[0010]
In FIG. 2, the clip 2 has a proximal end portion accommodated in the distal end of the sheath 1, and a pair of arm portions 2a in an open state and claw-like portions 2b formed to project inward at the respective distal ends. Is visible.
[0011]
The operation unit 20 connected to the base end of the sheath 1 has a slider 22 slidably attached to a main body shaft 23 having a finger hook 23a attached to the end portion, and the base end cylindrical body 21 of the sheath 1 is connected to the main body shaft 23 and The slider 22 is configured to be slidable independently of the slider 22.
[0012]
FIG. 3 shows the distal end portion of the sheath 1 in an enlarged manner, and the clip 2 is formed in a continuous manner by bending, for example, a stainless steel plate for a spring, and the claw-shaped portion extends from each distal end portion of the pair of arm portions 2a. 2b is bent inward and formed to protrude.
[0013]
The base end sides of the pair of arm portions 2a are connected by a base end connecting portion 2c formed in a slightly square α shape, and the arm portion 2a is deformed by deforming the base end connecting portion 2c. Open and close. In this figure, the clip 2 is elastically deformed by being pulled into the distal end of the sheath 1, and the arm portion 2a is in a narrowed state.
[0014]
An operation wire 3 that is advanced and retracted in the axial direction by the slider 22 disposed in the operation unit 20 is disposed at the axial position of the sheath 1 so as to be movable back and forth in the axial direction. A clip connecting hook 4 that can be engaged and disengaged is attached.
[0015]
The clip connecting hook 4 is formed with an arcuate slit-like engaging groove 4 a whose side surface is open so as to engage with the base end of the clip 2. Therefore, the feeding portion of the operating wire 3 is bent only by feeding the operating wire 3 to the front of the sheath 1 slightly larger, and the clip connecting hook 4 is bent and the engagement with the clip 2 is released.
[0016]
In the distal end of the sheath 1, a short cylindrical clip closing ring 6 for deforming the proximal end connecting portion 2c of the clip 2 is disposed. The proximal end portion of the clip closing ring 6 is detachably fitted to the distal end portion of the flexible operation tube 7 connected to the main body shaft 23 of the operation portion 20, and the proximal end connection portion 2c of the clip 2 is It is deformed by being pulled into the clip closing ring 6.
[0017]
The inner peripheral surface of the clip closing ring 6 has a constant diameter except for the vicinity of the rear end portion, and only the vicinity of the rear end portion is formed in a tapered shape toward the outside, and the rear end position has a small diameter. It is part 6a.
[0018]
As a result, after the proximal end connecting portion 2c of the clip 2 passes through the clip closing ring 6 in a state of being elastically deformed and crushed, as shown in FIG. 1, the base end connecting portion 2c expands at a position where it exits the small diameter portion 6a. The small-diameter portion 6a serves as a check stopper that prevents the engagement between the clip closing ring 6 and the clip 2 from being released, and the clip closing ring 6 becomes extremely difficult to be detached from the proximal end connecting portion 2c of the clip 2.
[0019]
When the endoscope clip device configured as described above is used, the sheath 1 is passed through a treatment instrument insertion channel (not shown) of the endoscope, and the clip 2 is inserted into the sheath 1 as shown in FIG. A pair of arms 2a are opened by protruding forward from the tip of the arm.
[0020]
In this state, when the affected part 100 is positioned between the pair of arms 2a and the clip closing ring 6 is pushed out from the operation unit 20 side, the tip of the clip closing ring 6 is paired with the pair of clips 2 as shown in FIG. At the same time that the arm portion 2a is pushed from the back side, the proximal end connecting portion 2c is deformed so that the pair of arm portions 2a are closed in parallel, and the pair of arm portions 2a sandwich the affected part 100. Become.
[0021]
Therefore, by removing the clip connecting hook 4 from the clip 2 and pulling the member on the sheath 1 side to the proximal side, the clip 2 with the clip closing ring 6 engaged with the clip 2 as shown in FIG. Is placed in a state where the mucous membrane of the affected part 100 is sandwiched.
[0022]
In this indwelling state, the base end connecting portion 2 c of the clip 2 is in a state of extending out from the small diameter portion 6 a at the rear end of the clip closing ring 6, and the clip closing ring 6 extends from the clip 2. Since the retraction is prevented, the clip closing ring 6 cannot be disengaged from the clip 2 even when an external force is applied, and the clip 2 is not easily detached from the affected area 100.
[0023]
【The invention's effect】
According to the present invention, when the clip closing ring is engaged with the clip, the clip is regulated by the check stopper so that the engagement is not released, and the clip is kept closed. An excellent indwellability can be obtained without being easily removed from the affected area by the action of external force or the like.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view illustrating a closed state in a clip opening / closing operation of an endoscope clip device according to an embodiment of the present invention.
FIG. 2 is an external view showing an overall configuration of an endoscope clip device according to an embodiment of the present invention.
FIG. 3 is a side cross-sectional view of a distal end portion of the endoscope clip device according to the embodiment of the present invention.
FIG. 4 is a side cross-sectional view showing an open state in the opening and closing operation of the clip of the endoscope clip device according to the embodiment of the present invention.
FIG. 5 is a side sectional view showing an indwelling state of the clip of the endoscope clip device according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sheath 2 Clip 2a Arm part 2c Base end connection part 3 Operation wire (operation movement transmission member)
4 Clip connecting hook 6 Clip closing ring 6a Small diameter part (check stopper)
7 Flexible operation tube (operation motion transmission member)
20 Operation unit

Claims (1)

A pair of arms connected at the base end side are opened and closed by deforming the vicinity of the base end connecting portion, and the arm portion by engaging near the base end connecting portion of the clip A clip closing ring that maintains the closed state of the clip in the vicinity of the distal end of the sheath so as to be detachable from the sheath, and the clip closing ring that is not engaged in the vicinity of the proximal end coupling portion of the clip. In an endoscope clip device in which an operation motion transmission member that is engaged with the vicinity of a proximal end coupling portion of the clip by remote operation from a proximal end side is inserted and arranged in the sheath.
The base end connecting portion that connects the pair of arms of the clip is formed in a square α-shape,
A non-return stopper that prevents the clip closing ring from releasing when the clip closing ring is engaged with the clip is tapered toward the rear end of the inner peripheral surface of the clip closing ring. Consists of a small diameter part formed in a constricted shape,
When the square α-shaped base end connecting portion of the clip is elastically deformed and crushed and spreads at a position passing through the small diameter portion, the clip operates in the closing direction, and the base end connecting portion of the clip The clip device for an endoscope, wherein a diagonal portion of the portion comes into contact with a small-diameter portion of the clip closing ring from the outside so that the engagement between the clip closing ring and the clip is difficult to be released.

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