JP4046981B2 - 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 closure ring located adjacent to the rear side of the clip that is detachably connected to the distal end of the flexible sheath so that the clip is retracted into the clip closure ring. It is configured to be held in a closed state after being opened / closed by and to be placed in the body together with a clip closing ring.
[0003]
[Problems to be solved by the invention]
In the endoscope clip device as described above, since the clip and the clip closing ring are arranged in series, the length of the hard portion at the distal end portion of the flexible sheath is very long. Become.
[0004]
Therefore, in the state where the endoscope treatment instrument insertion channel is bent with a small radius of curvature, the distal end portion of the endoscope clip device may be caught there, and the insertion / removal may become impossible. .
[0005]
Therefore, the present invention can shorten the length of the hard portion of the distal end portion, and allows the treatment instrument insertion channel of the endoscope to pass smoothly without damage even if it is bent with a small radius of curvature. An object of the present invention is to provide a mirror 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 closing ring disposed adjacent to the rear side of the clip and is detachably connected to the distal end of the flexible sheath. However, in the endoscope clip device configured to be held in a closed state after being opened and closed by being pulled into the clip closing ring, the clip closing ring is formed by a bendable cylindrical body. .
[0007]
The clip closing ring may be formed of a coil pipe obtained by winding a metal wire with a constant diameter, or may be formed of an elastic rubber material.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 2 shows the entire configuration of the endoscope clip device, and the clip 2 is attached to the distal end of a coiled pipe-like flexible sheath 1 in which, for example, a stainless steel wire is tightly wound with a constant diameter. .
[0009]
An operation wire 3 whose tip is connected to the clip 2 is inserted and disposed in the sheath 1 so as to be able to advance and retreat in the axial direction. The outer surface of the sheath 1 is made of, for example, a tetrafluoroethylene resin tube or a superelastic alloy tube. A flexible outer tube 10 is loosely fitted so as to be movable back and forth in the axial direction.
[0010]
In FIG. 2, the clip 2 is housed in the distal end of the outer tube 10 at a portion near the proximal end, and has a pair of open arm portions 2 a and claws formed to project inwardly at the respective distal ends. The shape portion 2b is visible.
[0011]
The operation unit 20 connected to the base end of the sheath 1 has a finger hook 23a attached to the other end side of the operation unit main body 23 to which the base end of the sheath 1 is connected, and a slider 22 to which the base end of the operation wire 3 is connected. Is configured to be slidable in the axial direction with respect to the operation unit main body 23.
[0012]
FIG. 3 is an enlarged view of the distal end portion of the clip device for an endoscope. In this drawing, a natural state when no external force is applied (that is, a state where the pair of arm portions 2a are parallel) is shown. The clip 2 is covered with the tip of the outer tube 10.
[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]
A clip coupling hook 4 that can be engaged with and disengaged from a clip coupling wire 5 extending rearward from the clip 2 is attached to the distal end of the operation wire 3 that is disposed so as to be movable back and forth at the axial position of the sheath 1. .
[0016]
The clip connecting hook 4 is configured such that the operation wire 3 is connected and fixed to the rear half by soldering or the like, and the annular clip connecting wire 5 is engaged with or disengaged from the recess 4a formed in the side portion of the front half. Can be done. The clip connecting wire 5 is formed in an annular shape by connecting both end portions of one wire.
[0017]
A clip closing ring 6 for deforming the proximal end connecting portion 2c of the clip 2 is detachably fitted in a portion near the distal end of the cylindrical ring receiving member 8 fixed to the distal end of the sheath 1.
[0018]
The clip closing ring 6 of this embodiment is formed by a coil pipe in which a stainless steel wire is tightly wound with a constant diameter, and the proximal end connecting portion 2c of the clip 2 is crushed by being pulled into the clip closing ring 6. Therefore, it deforms from a substantially regular circle to an ellipse.
[0019]
The endoscope clip device configured as described above is passed through the treatment instrument insertion channel of the endoscope in the state shown in FIG. 3, and the treatment instrument insertion channel 40 is bent as shown in FIG. Pass the part that is.
[0020]
Then, in the portion where the treatment instrument insertion channel 40 is bent, the clip closing ring 6 is bent together with the inner clip connecting wire 5 and the outer mantle tube 10 accordingly.
[0021]
As described above, since the distal end hard portion that does not bend flexibly is only the clip 2 portion in the distal end portion of the endoscope clip device, even when the treatment instrument insertion channel 40 is bent with a considerably small radius of curvature, it is smooth and does not catch. Can pass through.
[0022]
When the distal end portion of the endoscope clip device protrudes into the body from the distal end of the treatment instrument insertion channel 40 of the endoscope, as shown in FIG. 4, the outer tube 10 is slightly pulled toward the operation unit 20 side to pull the clip 2. The operation wire 3 is pulled toward the operation unit 20 with the outer tube 10 protruding forward from the distal end.
[0023]
Then, the proximal end connecting portion 2c of the clip 2 is drawn into the clip closing ring 6 and deformed from a circular shape to an elliptical shape, thereby changing the pair of arm portions 2a to an open state.
[0024]
In this state, when the affected part 100 to be clipped is positioned between the pair of arms 2a and the operation wire 3 is further pulled toward the operation part 20, the clip closing ring 6 is moved to the tip as shown in FIG. The pair of arms 2a of the clip 2 is pushed from the back side by the portion, whereby the pair of arms 2a is closed in parallel, and the nail-like portion 2b is stuck into the mucous membrane of the affected area 100.
[0025]
Therefore, by pulling back the sheath 1 to the proximal side while pushing the operation wire 3 slightly forward, the engagement between the clip connecting wire 5 and the clip connecting hook 4 is loosened. Therefore, if the distal end portion of the sheath 1 is appropriately moved left and right As shown in FIG. 6, the clip 2 is detached from the sheath 1 in a state where the clip 2 is closed by the clip closing ring 6 and bites into the mucous membrane of the affected part 100, and is placed.
[0026]
Figure 7 is an exemplary embodiment of the present invention are those using a tubular member or the like made of the clip closing rubber material which is resilient as a ring 6.
[0027]
In addition, this invention is not limited to the said Example, The number of the arm parts 2a of the clip 2 may be three or more, and the operation wire 3 and the clip 2 are members other than a wire. It can be connected.
[0028]
【The invention's effect】
According to the endoscope clip device of the present invention, the clip closing ring that is detachably connected to the distal end of the flexible sheath adjacent to the rear side of the clip is formed by a bendable cylindrical body. By shortening the length of the hard portion of the distal end portion, even when the treatment instrument insertion channel of the endoscope is bent with a small radius of curvature, it can pass smoothly without breakage.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a state in which a distal end portion of an endoscope clip device according to a first embodiment of the present invention passes through a treatment instrument insertion channel of an endoscope.
FIG. 2 is an external view showing the overall configuration of the endoscope clip device according to the first embodiment of the present invention.
FIG. 3 is a side sectional view of the distal end portion of the endoscope clip device according to the first 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 first embodiment of the present invention.
FIG. 5 is a side sectional view showing a closed state in the opening / closing operation of the clip of the endoscope clip device according to the first embodiment of the present invention.
FIG. 6 is a side cross-sectional view showing an indwelling state of the clip in the endoscope clip device according to the first embodiment of the present invention.
FIG. 7 is a side sectional view of a distal end portion of an endoscope clip device according to a reference example of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sheath 2 Clip 2a Arm part 3 Operation wire 4 Clip connection hook 5 Clip connection wire 6 Clip closing ring 10 Mantle tube 20 Operation part

Claims (1)

Condition clip closed ring disposed adjacent to the rear side of the clip is being removably connected to the distal end of the flexible sheath, the clip was Ji Ri閉 by to be drawn into the clip closed in the ring In the endoscope clip device configured to be held by
The clip device for an endoscope, wherein the clip closing ring is formed of a coil pipe in which a metal wire is wound with a constant diameter .

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