JP4283428B2 - Endoscopic inflatable treatment tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope expansion / contraction treatment tool.
[0002]
[Prior art]
Endoscopic treatment tools, such as a snare for polyp excision, a basket-type foreign material collection tool, or a three-nail gripping tool, which are formed so as to spread by their own elasticity in a natural state, are used as endoscope treatment tools. Many of them have a configuration in which they are expanded and contracted by entering and exiting the tip of a flexible tube or the like.
[0003]
In the case of such an endoscopic inflatable treatment tool, when a target is captured, it is moved so as to be drawn into a flexible tube in order to constrict a tip treatment member such as a snare loop or a basket. In the case of a small target, it cannot slip through the distal treatment member and be captured well.
[0004]
Therefore, the fixed wire is inserted and arranged in the flexible mantle so as not to move in the axial direction, the distal treatment member is connected to the tip of the fixed wire, and is inserted and arranged in the flexible mantle so as to freely advance and retract in the axial direction. There is an improvement that can be accommodated in the distal end of the flexible inner tube without moving the distal treatment member by pushing the flexible inner tube forward (Japanese Patent Laid-Open No. 10-5242, Japanese Patent Laid-Open 10-5234).
[0005]
[Problems to be solved by the invention]
However, the conventional endoscopic inflatable treatment tool as described above has a double tube structure of a flexible outer tube and a flexible inner tube over the entire length. When used in a meandering state by being inserted through a channel, the frictional resistance between the outer tube and the inner tube becomes very large, and there are many cases where the inner tube is moved forward and backward.
[0006]
Therefore, the present invention allows the tip treatment member to be inflated and contracted without being moved, so that even a small target can be easily captured and treated, and during operation, the tip treatment member can be easily inflated without any large frictional resistance acting. An object of the present invention is to provide an endoscopic inflatable treatment tool that can be contracted.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the endoscopic inflatable treatment tool of the present invention is inserted and arranged in a flexible mantle tube, and the proximal end side is fixed so that the tip protrudes from the tip of the flexible mantle tube. A distal end treatment member formed so as to spread by its own elasticity in the natural state is connected to the distal end of the flexible fixing wire thus formed, and is disposed in the flexible outer tube so as to be movable back and forth in the axial direction. In an endoscopic inflatable treatment tool in which the distal treatment member moves in and out of the flexible inner tube by advancing and retracting the sexual inner tube, the flexible inner tube is positioned near the distal end of the flexible outer tube The flexible inner tube is connected to the distal end of an operation wire which is disposed only in the flexible mantle tube and is inserted and disposed so as to be movable forward and backward in the axial direction.
[0008]
The rear end of the fixing wire may be fixed near the distal end of the flexible outer tube, or may be fixed near the proximal end of the flexible outer tube.
In addition, a first finger hook is formed at the proximal end of the rod-shaped member, and an operation portion is provided to engage the second finger hook so as to be movable in the axial direction with respect to the rod-shaped member. The end may be connected and fixed to the rod-like member, and the base end of the flexible mantle tube may be connected and fixed to the second finger hook, or the base end of the flexible mantle tube may be connected and fixed to the rod-like member and operated. The proximal end of the wire may be connected and fixed to the second finger hook.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a distal end portion of an endoscopic inflatable treatment tool, and reference numeral 1 denotes a flexible outer tube that is inserted into and removed from an endoscope treatment tool insertion channel (not shown). The outer diameter is about 2 mm and the length is about 1-2 m.
[0010]
In the vicinity of the distal end of the flexible mantle tube 1, a short (for example, about 10 to 30 cm) fixing wire 2 made of a flexible stainless steel stranded wire or the like is inserted, and the proximal end of the fixing wire 2 is inserted. Is fixed to the inner peripheral surface of the flexible outer tube 1 by a wire fixing cylinder 3.
[0011]
As shown in the perspective view of FIG. 3, the wire fixing cylinder 3 includes a thick cylindrical portion that is tightly fitted and fixed to the inner periphery of the flexible outer tube 1, and a proximal end portion of the fixing wire 2. The thin cylindrical part that is inserted and fixed by bonding is eccentrically formed integrally and continuously. However, the wire fixing cylinder 3 may have other shapes.
[0012]
As shown in FIG. 1, a distal end treatment member made of an elastic wire formed so as to spread in a loop shape by its own elasticity as shown in FIG. 1 is attached to the distal end of the fixed wire 2 protruding from the distal end of the flexible outer tube 1 5 are connected via a connecting pipe 4.
[0013]
The distal treatment member 5 is disposed so as to protrude forward from the distal end of the flexible mantle tube 1, and in this embodiment, the distal treatment member 5 is a snare loop 5A for binding a polyp.
[0014]
However, the distal treatment member 5 is not limited as long as it is formed so as to expand by its own elasticity in a natural state. For example, as shown in FIG. 4, a basket formed in a basket shape with 3 to 4 elastic wires. It may be 5B, and as shown in FIG. 5, it may be a claw-type gripping material 5C in which a single wire of a spring material is extended to 3 to 4 tips.
[0015]
Returning to FIG. 1, a flexible inner tube 7 made of, for example, a tetrafluoroethylene resin tube is inserted and disposed in the vicinity of the distal end portion of the flexible mantle tube 1 so as to advance and retract in the axial direction. The length is, for example, about 5 to 15 cm.
[0016]
The distal end of the flexible inner tube 7 is connected to the distal end of the operation wire 6 inserted in the axial direction in the flexible outer tube 1 by a wire connecting cylinder 8. The wire connecting cylinder 8 is formed in a substantially similar shape that is slightly smaller than the wire fixing cylinder 3 described above, but other shapes may be used.
[0017]
At the distal end of the flexible inner tube 7, a distal tip 9 having a maximum outer diameter that cannot be drawn into the flexible outer tube 1 and allowing the distal treatment member 5 to pass in a constricted state is attached. Yes. However, the tip 9 can be omitted.
[0018]
The operation wire 6 can be moved back and forth in the axial direction with respect to the flexible outer tube 1 by an operation from the base end side, and when the operation wire 6 is pulled to the base end side as shown in FIG. The flexible inner tube 7 is drawn into the distal end of the flexible outer tube 1 and the distal treatment member 5 is inflated.
[0019]
When the operation wire 6 is pushed from the proximal side to the distal end side, the flexible inner tube 7 connected to the distal end of the manipulation wire 6 is moved to the distal end of the flexible outer tube 1 as shown in FIG. The tip treatment member 5 is pushed out and covered with the tip treatment member 5, and the tip treatment member 5 is narrowed.
[0020]
Accordingly, since the distal treatment member 5 can be expanded and contracted without moving at all, even if a small target is once put in the distal treatment member 5, it is difficult to come off and can be easily captured and treated.
[0021]
Further, the flexible inner tube 7 is a short one disposed only at the distal end portion of the flexible outer tube 1, and it is within the flexible outer tube 1 that the flexible inner tube 7 is moved in the axial direction. Since the operation wire 6 is inserted, even if the flexible outer tube 1 is twisted, a large frictional resistance is not generated in the forward / backward operation of the flexible inner tube 7, and the distal treatment member 5 is easily expanded and contracted. be able to.
[0022]
FIG. 6 is a first example of the operation unit 10 provided on the hand side of the endoscope inflatable treatment tool, and the first finger hook 12 for engaging the thumb of the operator's hand is the hand side. The proximal end of the flexible mantle tube 1 is connected and fixed to the distal end of a rod-like operation unit main body 11 formed at the end.
[0023]
In the slit 13 formed in the operation unit main body 11, a wire connection block 14 to which the proximal end of the operation wire 6 is connected is disposed, and the wire connection block 14 is slidably engaged with the operation unit main body 11. It is locked in the second finger hook 15.
[0024]
Accordingly, when the two finger hooks 12 and 15 are pulled in a direction in which they approach each other, the flexible inner tube 7 is pulled toward the hand side via the operation wire 6 and the distal end treatment member 5 expands, and the two finger hooks 12 and 15 are expanded. When it is pulled away in the direction of leaving, the flexible inner tube 7 is pushed forward via the operation wire 6 and the distal treatment member 5 is narrowed.
[0025]
FIG. 7 is a second example of the operation unit 20 provided on the hand side of the endoscope expansion / contraction treatment tool, and the first finger hook 22 for engaging the thumb of the operator's hand is the hand side. The base end of the operation wire 6 is connected and fixed to a rod-shaped operation unit main body 21 formed at the end. Reference numeral 27 denotes a manual screw for performing the fixing.
[0026]
In the slit 23 formed in the operation portion main body 21, an outer tube connecting block 24 in which the base end of the flexible outer tube 1 is connected via a connecting pipe 26 is disposed, and the outer tube connecting block 24 is It is locked in a second finger hook 25 slidably engaged with the operation portion main body 21. Reference numeral 28 denotes a manual screw for fixing the connecting pipe 26 to the outer tube connecting block 24.
[0027]
Therefore, when the two finger hooks 22 and 25 are pulled toward each other, the flexible inner tube 7 is pushed forward via the operation wire 6 and the distal end treatment member 5 is narrowed. When pulled away in the direction away from 15, the flexible inner tube 7 is pulled toward the proximal side via the operation wire 6, and the distal treatment member 5 is expanded.
[0028]
The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 8, the rear end of the fixing wire 2 may be fixed near the base end of the flexible mantle tube 1. In this example, the short cylinder 9 fixed to the proximal end of the fixed wire 2 is press-fitted and fixed to the proximal end portion of the flexible outer tube 1.
[0029]
【The invention's effect】
According to the present invention, since the tip treatment member can be expanded and contracted without moving at all, even if a small target is once put in the tip treatment member, it is difficult to come off and can be easily captured and treated.
[0030]
The flexible inner tube is a short one disposed only at the distal end portion of the flexible mantle tube, and the flexible inner tube is moved in the axial direction because the operation wire is inserted into the flexible mantle tube. Even when the flexible mantle tube is in a tortuous state, a large frictional resistance is not generated in the advancing and retreating operation in the flexible mantle tube, and the distal treatment member can be easily expanded and contracted.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view of a distal end portion in a state in which a distal treatment member of an inflatable / deflection treatment instrument for an endoscope according to an embodiment of the present invention is inflated.
FIG. 2 is a side cross-sectional view of the distal end portion of the endoscope inflating and deflating treatment tool according to the embodiment of the present invention in a state where the distal treatment member is narrowed.
FIG. 3 is a perspective view of a rear end fixing portion of the fixing wire according to the embodiment of the present invention.
FIG. 4 is a side view of a second example of the distal treatment member according to the embodiment of the present invention.
FIG. 5 is a side view of a third example of the distal treatment member according to the embodiment of the present invention.
FIG. 6 is a side cross-sectional view of a first example of an operation unit of an endoscopic inflatable treatment tool according to an embodiment of the present invention.
FIG. 7 is a side cross-sectional view of a second example of the operation unit of the endoscope expansion / contraction treatment tool according to the embodiment of the present invention.
FIG. 8 is a side sectional view of an endoscopic inflatable treatment tool according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flexible outer tube 2 Fixed wire 3 Wire fixed cylinder 5 End treatment member 6 Operation wire 7 Flexible inner tube 8 Wire connection cylinder 10,20 Operation part

Claims (3)

In the natural state, it spreads by its own elasticity to the distal end of a flexible fixing wire that is inserted and arranged in the flexible outer tube and the proximal end is fixed so that the distal end protrudes from the distal end of the flexible outer tube. The distal treatment member formed as described above is connected, and the flexible inner tube disposed in the flexible mantle tube is moved forward and backward in an axial direction so that the distal treatment member is moved into the flexible inner tube. In an endoscopic inflatable treatment tool that enters and exits and expands and contracts,
The flexible inner tube is arranged only in the vicinity of the distal end of the flexible cannula, the inner flexible tube to the distal end of the operation wire which is movably inserted and arranged in the axial direction to the flexible jacket tube There are connected,
A wire fixing cylinder for fixing the fixing wire in the flexible outer tube is provided in the vicinity of the distal end of the flexible outer tube and at a rear position from the proximal end of the flexible inner tube,
The wire fixing cylinder is fitted into the inner periphery of the flexible outer tube and fixed to the large diameter cylindrical portion, and protrudes forward from the tip edge of the large diameter cylindrical portion to protrude the fixed wire. An endoscopic expansion and contraction type for an endoscope, characterized in that the proximal end portion of the endoscope is eccentrically formed integrally with a thin cylindrical portion fixed and the operation wire passes through the large cylindrical portion. Treatment tool. A first finger hook is formed at the proximal end of the rod-shaped member, and an operation portion is provided to engage the second finger hook so as to be movable in the axial direction with respect to the rod-shaped member. end fixedly connected to said rod member, endoscopic deflating type treatment tool according to claim 1 Symbol placing the proximal end of the flexible cannula is connected and fixed to the second finger placing. A first finger hook is formed at the proximal end of the rod-shaped member, and an operating portion is provided to engage the second finger hook so as to be movable in the axial direction with respect to the rod-shaped member. the proximal end of the tube is fixedly connected to said rod member, endoscopic deflating type treatment tool according to claim 1 Symbol placing the proximal end of the operating wire is connected and fixed to the second finger placing.

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