JP4036993B2 - Endoscope treatment tool assembly tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an endoscope treatment tool assembly tool for assembling an endoscope treatment tool that can freely separate an operation wire to which a distal treatment member is connected and a flexible sheath.
[0002]
[Prior art]
In general, an endoscope treatment instrument has a configuration in which an operation wire is inserted into a flexible sheath, and after use, the operation wire and the flexible sheath are separated in order to perform cleaning and disinfection. When cleaning and disinfection is completed, the operation wire is again passed through the flexible sheath and assembled.
[0003]
[Problems to be solved by the invention]
For example, an endoscopic treatment tool such as a high-frequency snare, a basket-type foreign matter collecting tool, or a nail-type gripping tool has a configuration in which a tip treatment portion is connected to the tip of an operation wire.
[0004]
Many of such treatment instruments have a thickness in which the portion provided at the proximal end portion of the operation wire so as to be connected to the operation portion cannot pass through the sheath, and the operation wire is flexible. In order to pass through the sheath, it is necessary to insert it into the flexible sheath with the distal treatment section at the top.
[0005]
However, the flexible sheath of the treatment instrument is very thin and long with an inner diameter of about 1 to 2 mm and a length of about 1 to 2 m. Therefore, when the operation wire is pushed in with the distal treatment section where insertion resistance is generated when passing through the flexible sheath as the head, the operation wire is often buckled at the hand and may not be used. .
[0006]
Therefore, the present invention provides an assembly tool for an endoscope treatment tool that can be easily pushed in without buckling the manipulation wire when the manipulation wire is pushed into the flexible sheath with the distal treatment section at the head. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an endoscope treatment tool assembly tool according to the present invention has a poor flexibility having an inner diameter through which an operation wire of a treatment tool and a distal treatment member connected to the distal end thereof can be inserted. The first cylinder and the second cylinder made of members are disposed so as to be relatively slidable in the axial direction so that the first cylinder protrudes and retracts from the proximal end of the second cylinder, At the distal end of the second cylinder, there is provided a connection base that can be detachably connected to a base provided at the base end of the flexible sheath of the treatment instrument, and at the proximal end of the first cylinder. A finger pad for applying a fingertip to which the operation wire is picked is provided.
[0008]
A stopper may be provided to prevent the first cylindrical body from coming out of the proximal end of the second cylindrical body, and the first cylindrical body may be provided from the proximal end of the second cylindrical body. An urging means for urging in the protruding direction may be provided.
[0009]
The first and second cylinders may be inner and outer double cylinders.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an assembly tool for an endoscope treatment instrument according to an embodiment of the present invention. For example, an outer cylinder 1 and an inner cylinder 2 made of stainless steel pipes are used, and an inner cylinder 2 is an outer cylinder 1. It is arranged so as to be slidable in the axial direction relative to the state of protruding from the proximal end.
[0011]
The length of the outer cylinder 1 and the inner cylinder 2 is, for example, about 5 to 15 cm, and the inner diameter of the inner cylinder 2 is 1 to 2 mm, which is about the same as the inner diameter of the flexible sheath 10 of the treatment instrument described later. Is formed. In addition, as long as the outer cylinder 1 and the inner cylinder 2 are members with poor flexibility, any member may be used, and it is most preferable that the outer tube 1 and the inner tube 2 are formed of a rigid member.
[0012]
A connection base 3 that can be detachably connected to the base 11 provided at the base end of the treatment instrument by, for example, a so-called luer lock type screw connection is fixed to the distal end of the outer cylinder 1.
[0013]
A short cylindrical finger rest 4 for abutting the operator's fingertip is integrally formed at the proximal end of the inner cylinder 2 protruding from the outer cylinder 1. The finger rest 4 is for applying a fingertip for gripping the operation wire 12 of the treatment instrument inserted into the inner cylinder 2, and may be the end of the inner cylinder 2 itself.
[0014]
A compression coil spring 5 is disposed in the outer cylinder 1 in a compressed state along the inner peripheral surface, whereby the inner cylinder 2 is urged in a direction protruding from the proximal end of the outer cylinder 1. ing.
[0015]
However, the outer cylinder 1 and the inner cylinder 2 are formed with stoppers 6 and 7 that contact the inner cylinder 2 so as to prevent the inner cylinder 2 from slipping out of the outer cylinder 1 by deforming the wall portion by pressing. .
[0016]
As a result, in a state where no external force is applied, as shown in FIG. 1, the stoppers 6 and 7 collide with each other at a position slightly before the inner cylinder 2 comes out of the proximal end of the outer cylinder 1. maintain.
[0017]
Then, as shown in FIG. 2, the operation wire 12 of the treatment instrument is picked with a fingertip and inserted into the inner cylinder 2 from the proximal side, and the fingertip is applied to a finger rest 4 provided at the proximal end of the inner cylinder 2. In this state, if the inner cylinder 2 is pushed into the outer cylinder 1 against the urging force of the compression coil spring 5 as indicated by an arrow A, the operation wire 12 is pushed inward as indicated by an arrow B.
[0018]
During the movement, the proximal side portion of the operation wire 12 to be buckled due to the pushing force is in the inner cylinder 2 and cannot be bent sideways, so that there is a considerable insertion resistance on the distal end side. However, the operation wire 12 does not buckle on the hand side.
[0019]
FIG. 3 shows a high-frequency snare that is one of the endoscope treatment tools. For example, the flexible sheath 10 made of a tetrafluoroethylene resin tube or the like has an inner diameter of about 1 to 2 mm and a length of FIG. A base 11 having the same shape as a luer lock type injection needle base is attached to the base end thereof.
[0020]
The operation wire 12 is a stranded wire formed by twisting stainless steel fine wires, for example, and has a thickness of about 0.3 to 1 mm, for example, and a snare formed by bending an elastic wire in a loop shape at the tip. The loop 13 (tip treatment section) is connected.
[0021]
In the state of use, the operation wire 12 is inserted into the flexible sheath 10 so as to be able to advance and retract in the axial direction, and the operation wire 12 is advanced and retracted from the hand side operation unit (not shown). The snare loop 13 protrudes from the distal end of the sheath 10.
[0022]
When snare loop 13 is drawn into flexible sheath 10, the snare loop 13 squeezes, but because it tends to expand due to its own elasticity, push operation wire 12 while snare loop 13 is in flexible sheath 10. When doing so, considerable insertion resistance occurs.
[0023]
FIG. 3 shows a state in which the flexible sheath 10 and the operation wire 12 are separated from each other, and the assembly tool for an endoscope treatment instrument according to the present invention can be used with the snare loop 13 at the head. This is used when the operation wire 12 is inserted into the flexible sheath 10.
[0024]
FIG. 4 shows the preparation state, in which the connection base 3 of the outer cylinder 1 is connected to the base 11 of the base end of the flexible sheath 10, and the snare loop 13 starts from the inside of the proximal end of the inner cylinder 2. Then, the operation wire 12 is inserted. Note that the snare loop 13 may be inserted into the inner cylinder 2 to some extent before the connection base 3 is attached to the base 11 of the flexible sheath 10.
[0025]
When the operation wire 12 is picked with a fingertip and inserted into the inner cylinder 2 from the hand side, and the snare loop 13 reaches the flexible sheath 10 portion, the fingertip is placed at the proximal end of the inner cylinder 2 as shown in FIG. Apply to the provided finger pad 4.
[0026]
Subsequently, when the inner tube 2 is pushed into the outer tube 1 together with the operation wire 12 as indicated by an arrow A in FIG. 6, the operation wire 12 is moved into the inner portion of the flexible sheath 10 as indicated by an arrow B. Pushed in the direction.
[0027]
At the time of the movement, the repulsive force of the snare loop 13 constricted in the flexible sheath 10 acts as an insertion resistance, but the proximal side portion of the operation wire 12 to be buckled due to the pushing force is applied. Since it is in the inner cylinder 2 and cannot be bent sideways, buckling does not occur.
[0028]
After the inner cylinder 2 is pushed into the outer cylinder 1, the inner cylinder 2 returns to its original state by the spring force of the compression coil spring 5 if the fingertip is lightly released and returned to the front. At that time, the operation wire 12 is held by the frictional resistance between the inner surface of the flexible sheath 10 in a long meandering state and the force that the snare loop 13 spreads in the flexible sheath 10. Does not return to position. If the operation of pushing the inner cylinder 2 in such a manner is repeated, the operation wire 12 is inserted into the flexible sheath 10 without buckling.
[0029]
In addition, this invention is not limited to the said embodiment, For example, you may abbreviate | omit the compression coil spring 5, In that case, the near side edge part of the inner cylinder 2 pushed in in the outer cylinder 1 Just pick it up with your fingertip and return it to its original position.
[0030]
Further, the relationship between the inner cylinder 2 and the outer cylinder 1 is reversed so that the inner cylinder 2 is connected to the base 11 of the flexible sheath 10 and the outer cylinder 1 protrudes and slidably protrudes therefrom. May be. In addition, the endoscope treatment tool to which the assembly tool of the present invention is applied is not limited to a high-frequency snare and can be a variety of treatment tools.
[0031]
【The invention's effect】
According to the present invention, the operation wire of the treatment instrument is picked with the fingertip and inserted into the first cylinder, and the operation wire is pushed into the back by pushing the first cylinder together with the operation wire with the fingertip. During the movement, the proximal side portion of the operation wire that is to be buckled due to the pushing force is in the cylinder and cannot be bent sideways. It can be easily pushed and assembled into the flexible sheath without buckling.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an assembly tool for an endoscope treatment tool according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a state where an inner cylinder of an assembly tool for an endoscope treatment tool according to an embodiment of the present invention is pushed in.
FIG. 3 is a front view of a state in which an endoscope high-frequency snare to be assembled by an endoscope treatment tool assembly tool according to the present invention is disassembled.
FIG. 4 is a front view of the endoscope treatment tool assembly tool according to the present invention in a preparation state for use.
FIG. 5 is a front view of the endoscope treatment tool assembly tool of the present invention in use.
FIG. 6 is a front view of the endoscope treatment tool assembly tool of the present invention in use.
[Explanation of symbols]
1 Outer cylinder (second cylinder)
2 Inner cylinder (first cylinder)
3 Connection base 4 Finger pad 5 Compression coil springs 6 and 7 Stopper 10 Flexible sheath 11 Base 12 Operation wire 13 Snare loop (tip treatment section)

Claims (4)

A first cylindrical body and a second cylindrical body made of a poorly flexible member having an inner diameter through which an operation wire of the treatment instrument and a distal treatment member connected to the distal end thereof can be inserted, and the first cylindrical body is the It is arranged so as to be relatively slidable in the axial direction so as to protrude from the proximal end of the second cylinder, and is provided at the proximal end of the flexible sheath of the treatment instrument at the distal end of the second cylinder. A connection base that can be detachably connected to the base is provided, and a finger rest for applying a fingertip that grips the operation wire is provided at the proximal end of the first cylinder. An assembly tool for an endoscope treatment instrument. The endoscopic treatment instrument assembling tool according to claim 1, further comprising a stopper that prevents the first cylindrical body from slipping out from a proximal end portion of the second cylindrical body. The assembly tool for an endoscope treatment instrument according to claim 2, further comprising a biasing means for biasing the first cylinder in a direction in which the first cylinder projects from a proximal end of the second cylinder. The assembly tool for an endoscope treatment instrument according to claim 1, 2 or 3, wherein the first and second cylinders are double cylinders.

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