JP4105406B2 - 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]
Endoscopic clip devices generally have a clip formed so that a pair of arms connected at the base end side opens and closes by deforming the vicinity of the base end connection portion, and the vicinity of the base end connection portion of the clip A clip closing ring that keeps the pair of arms closed by engaging with is disposed in the vicinity of the distal end of the sheath so as to be detachable from the sheath.
[0003]
The clip used in such a clip device is formed by bending a spring-like stainless steel plate material or the like into an α shape on the base end side, and the extending portion is an arm portion (actual Kosho 53-11589 etc.).
[0004]
[Problems to be solved by the invention]
However, as described above, the clip formed from a single plate material with the base end bent in an α shape has a half width of the plate material at the boundary portion between the base end connecting portion and the arm portion, which is a crossing portion of α. Since it becomes the following, the part became weak in strength, and it was not uncommon for it to be deformed accidentally during handling and to become unusable.
[0005]
Therefore, the present invention provides an easy-to-handle endoscope for a clip formed by bending a single plate material so that the clip does not have low strength at the boundary between the arm portion and the base end connecting portion, and there is no fear of deforming the clip by mistake. An object is to provide a clip device.
[0006]
[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 the vicinity of the proximal end coupling portion of the clip, in an endoscopic clip device that is detachably disposed near the distal end of the sheath The clip is formed by bending a single plate-like member without intersecting it in the middle, and is formed by bending the boundary portion between the base end connecting portion and the pair of arm portions into a constricted shape.
[0007]
Note that, at the boundary portion between the base end connecting portion and the pair of arm portions, the plate-like member may be bent into a shape protruding inward from both outer sides, and the top portions of the protruding portions may be in contact with each other. Good.
[0008]
Moreover, the clip may be formed in substantially the same width over the whole.
[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 is housed in the distal end of the sheath 1 at the proximal end, and has a pair of arms 2 a in an open state and a claw-like shape projecting inwardly at each distal end. Part 2b 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, 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. 1 shows the distal end portion of the sheath 1 in an enlarged manner. In this figure, the clip 2 that is in a natural state when no external force is applied (that is, a state where the pair of arm portions 2a are parallel) is shown in FIG. It is almost completely drawn into the sheath 1.
[0013]
The clip 2 is formed of a plate-like member such as a stainless steel plate material for a spring, for example, and the proximal end side of a pair of arm portions 2a that are parallel in a natural state is formed in a substantially 360 ° annular shape. The claw-like portions 2b are bent inward from the tip portions of the respective arm portions 2a so as to protrude from each other.
[0014]
The clip 2 is formed by bending a single plate-shaped member without intersecting the middle, and the boundary portion 2t between the base end connecting portion 2c and the pair of arms 2a is formed from the outer sides of the plate-shaped member. It is bent into a constricted shape protruding inward, and the tops of the protruding portions are in contact with each other.
[0015]
The clip 2 thus formed does not need to be provided with a narrow portion in the boundary portion 2t and any other portion, and is formed with a substantially constant width throughout. Therefore, there is no portion that is weak in strength, and there is no fear of being deformed by mistake during handling. It should be noted that contrivances such as forming the claw-like portion 2b slightly narrower do not cause an adverse effect on strength.
[0016]
At the axial position of the sheath 1, an operation wire 3 that is advanced and retracted in the axial direction by the slider 22 disposed in the operation section 20 is disposed so as to be movable back and forth in the axial position of the sheath 1, and at the tip thereof, A clip connecting hook 4 that can be engaged with and disengaged from the clip 2 is attached via a connecting member 5.
[0017]
The clip connecting hook 4 is connected to the clip 2 by a leading end portion having a thick outer diameter being passed through a connecting hole 2d formed at the base end of the base end connecting portion 2c of the clip 2 to prevent the clip connecting hook 4 from coming off. ing.
[0018]
Then, as shown in FIG. 4 to be described later, the clip connecting hook 4 is extracted from the connecting hole 2d by elastic deformation so as to narrow the slit formed in the axial direction of the clip connecting hook 4, and connected to the clip 2 The state can be released.
[0019]
A clip closing ring 6 for deforming the proximal end connecting portion 2c of the clip 2 is disposed in the distal end of the sheath 1. The clip closing ring 6 is formed in a short cylinder shape whose inner diameter on the proximal end side is narrower than that on the distal end side, and the proximal end connecting portion 2 c of the clip 2 is deformed by being pulled into the clip closing ring 6.
[0020]
The ring receiving member 8 in which the base end portion of the clip closing ring 6 is detachably fitted is attached to the tip of the ring extrusion coil 7 composed of a closely wound coil of, for example, a stainless steel wire connected to the main body shaft 23 of the operation unit 20. It is fixed.
[0021]
In the endoscope clip apparatus configured as described above, the sheath 1 is passed through a treatment instrument insertion channel of an endoscope (not shown) so that the clip 2 protrudes forward from the distal end of the sheath 1. The 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).
[0022]
Then, first, as shown in FIG. 3, the base end connecting portion 2 c of the clip 2 is pulled into the clip closing ring 6 and deformed, so that the pair of arm portions 2 a is changed to an open state. .
[0023]
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 proximal end connecting portion 2c is further deformed and the clip closing ring as shown in FIG. The tip of 6 pushes the pair of arm portions 2a of the clip 2 from the back side, whereby the pair of arm portions 2a are closed in parallel, and the nail-like portion 2b is stuck into the mucous membrane of the affected area 100.
[0024]
In addition, the base end connecting portion 2c of the clip 2 is deformed into a state in which the base end connecting portion 2c of the clip 2 is fitted into the narrow inner diameter portion on the base end side of the clip closing ring 6 so as to be crushed. It will be in a state where it can escape.
[0025]
Therefore, by removing the clip connecting hook 4 from the clip 2 and pulling the entire portion on the sheath 1 side toward the hand side, the clip 2 bites into the mucous membrane of the affected area 100 together with the clip closing ring 6 as shown in FIG. Detained in the attached state.
[0026]
【The invention's effect】
According to the present invention, the clip is formed by bending a single plate-shaped member without intersecting the middle, and the boundary between the base end connecting portion and the pair of arm portions is bent and formed into a constricted shape. Therefore, it is not necessary to narrow the width of the plate-like member in any part including the boundary part between the arm part and the base end connecting part, so that the clip does not have low strength, and the clip is mistakenly handled during handling. There is no fear of deformation.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a distal end portion 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 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. 4 is a side cross-sectional view showing a closed state in the opening / 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 2b Claw-shaped part 2c Base end connection part 2t Boundary part 3 Operation wire 4 Clip connection hook 5 Connecting member 6 Clip closing ring 7 Ring pushing coil 20 Operation part

Claims (2)

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 In a clip device for an endoscope in which a clip closing ring that maintains a closed state is disposed in the vicinity of the distal end of the sheath so as to be removable from the sheath.
The clip is formed by bending a single plate-like member without intersecting it in the middle, and a boundary portion between the base end connecting portion and the pair of arm portions is lateral along the plate surface of the plate-like member. Formed by bending it into a constricted shape ,
An internal view wherein the plate-like member is bent into a shape projecting inward from both outer sides at the boundary portion between the proximal end connecting portion and the pair of arm portions, and abutted between top portions thereof Mirror clip device. Endoscopic clipping device of claim 1 Symbol mounting the clip is formed in substantially the same width throughout.

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