JP4102038B2 - 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 an excellent indwellability can be obtained because the clip closing ring is difficult to come off from the indwelling clip.
[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 In this case, a check stopper is provided at the base end connecting portion of the clip to prevent the clip closing ring from being released when the clip closing ring is engaged with the clip.
[0008]
The check stopper may be a leaf spring-like member that elastically spreads from the proximal end connecting portion of the clip.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 3 shows the overall configuration of the clip device for an endoscope, and a clip 2 is arranged at the distal end portion of a flexible sheath 1 made of, for example, a tetrafluoroethylene resin tube.
[0010]
In FIG. 3, 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, for example, by bending a spring stainless steel plate or the like, and has a claw-like portion 2b bent inwardly from each tip portion of the pair of arm portions 2a.
[0014]
The base end sides of the pair of arm portions 2a are connected by a base end connecting portion 2c formed in an approximately 360 ° ring shape, and the arm portion 2a is opened and closed by deforming the base end connecting portion 2c. To do.
[0015]
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 with and disengaged is attached via a connecting member 5.
[0016]
As shown in FIG. 2, the clip connecting hook 4 is connected to the clip 2 by engaging a proximal end connecting portion 2 c of the clip 2 with a distal end portion formed in a U shape. Therefore, the clip connecting hook 4 can be disengaged from the clip 2 by feeding the operation wire 3 slightly forward.
[0017]
Returning to FIG. 1, a short cylindrical clip closing ring 6 for deforming the proximal end connecting portion 2 c of the clip 2 is disposed in the distal end of the sheath 1, and the proximal end connecting portion 2 c of the clip 2 is Then, it is deformed by being pulled into the clip closing ring 6.
[0018]
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.
[0019]
When the clip closing ring 6 is engaged with the clip 2 by elastically spreading from the proximal end connecting portion 2c of the clip 2 to the clip 2 formed in a continuous manner by the leaf spring-like member, the clip 2 A check stopper 2e that prevents the closing ring 6 from being detached from the clip 2 is formed to protrude outward.
[0020]
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).
[0021]
Then, first, as shown in FIG. 4, the proximal end connecting portion 2 c of the clip 2 is pulled into the clip closing ring 6 and is deformed, so that the pair of arm portions 2 a is changed to an open state. . At this time, the check stopper 2e is inserted into the clip closing ring 6 and is elastically deformed into a squeezed state.
[0022]
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 part 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 is closed in parallel, and the nail-like portion 2b is stuck into the mucous membrane of the affected area 100.
[0023]
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.
[0024]
In this indwelling state, the check stopper 2e passes through the clip closing ring 6 and returns to the state of spreading on the back side of the clip closing ring 6 to prevent the clip closing ring 6 from retracting from the clip 2. Even when an external force is applied, the clip closing ring 6 cannot be disengaged from the clip 2, so that the clip 2 does not easily fall off the affected part 100.
[0025]
【The invention's effect】
According to the present invention, when the clip closing ring is engaged with the clip, it 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 sectional view of a distal end portion of an endoscope clip device according to an embodiment of the present invention.
FIG. 2 is a partial perspective view showing the vicinity of a connecting portion between a clip and a clip connecting hook according to an embodiment of the present invention.
FIG. 3 is an external view showing an overall configuration of an endoscope clip device according to an 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 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. 6 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 2e Check stopper 3 Operation wire (operation movement transmission member)
4 clip connecting hook 6 clip closing ring 7 ring extrusion coil (operation motion transmission member)
20 Operation unit

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 A clip closing ring that maintains the closed state of the clip, and is disposed in the vicinity of the distal end of the sheath so as to be detachable from the sheath. In an endoscope clip device in which an operation motion transmission member that is engaged with the vicinity of the proximal end coupling portion of the clip by remote operation from the proximal end side is inserted and disposed in the sheath.
When the clip closing ring is engaged with the clip, a check stopper that prevents the engagement from being released without opening the clip is provided at the proximal end connecting portion of the clip .
The non-return stopper is a leaf spring-like member that elastically spreads from the base end coupling portion of the clip, and does not return to the clip closing ring by passing through the clip closing ring and elastically spreading. Endoscopic clip device characterized by becoming . A ring receiving member into which a proximal end portion of the clip closing ring is detachably fitted is provided at a distal end of the sheath, and an inner diameter of the ring receiving member is set at a position rearward of the proximal end of the clip closing ring. endoscopic clipping device according to claim 1, wherein the formed larger than the inner diameter of the clip closing ring.

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