JPH09201367A - Treatment device for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate working of binding parts and surely, easily perform a fixing work of a wire to the binding member by providing the binding member for fixing the tip side end of the wire along with a filling material in the inside diameter of the first pipe member and the outside diameter side of the second pipe member. SOLUTION: The tip side of an operation wire 2 having this-side end part connected to this-side operation part of a treatment tool for an endoscope is inserted inside a sheath 3 having a stopper 10 arranged in an appropriate part, extended by penetrating through a binding member 4, and its tip side end which is formed into a semicircular loop part 5 is fixed to the binding member 4. The binding member 4 is so formed that a large-diameter pipe 7 having an operational wire insertion hole 8 is inserted into a large-diameter pipe 6 made of stainless steel, etc. The binding member 4 can be thus formed by only a cutting work of the pipe member so that a part working is easy and fixing of the operational wire 2 to the binding member 4 can be facilitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment instrument for an endoscope which is inserted into a body cavity for treatment.

[0002]

2. Description of the Related Art A conventional treatment tool for an endoscope is shown in FIGS.
0 will be described. FIG. 8 shows a cross section of the distal end portion of the endoscope treatment tool. In this endoscopic treatment tool,
When the operation wire 51 is moved to the distal end side with respect to the sheath 52 by an operation from a hand side operation unit (not shown), a binding member 54 is attached to a stopper 53 fixed inside the sheath 52.
Hits. Further, when the operation wire 51 is moved to the distal end side, the wire 55 fixed to the binding member 54 does not move further to the distal end side, and only the wire 56 which is movable with respect to the binding member 54 has the distal end. Move to the side. As a result, a half-moon shaped loop portion 57 is formed on the distal end side of the sheath 52. The bundling member 54 has a shape as shown in FIG. 9 or 10, and has a hole 58 through which the operation wire 51 can be inserted in the longitudinal direction of a cylindrical member and a tip end side of the wire with solder, solder, adhesive or the like. Hole 59 or groove 60 for fixing the end
have. However, such holes and grooves of the binding member 54 are difficult to process. Also, a hole 58 through which the wire 56 can be inserted and a hole 59 that fixes the end portion of the wire 55.
Alternatively, since the distance to the groove 60 is close, when the wire 55 is fixed with solder, solder, adhesive, or the like, solder, solder, adhesive, or the like protrudes from the fixing hole 59 or groove 60 into the hole 58. Since the wire 56 that is movable with respect to the binding member 54 interferes with the binding member 54, there is a risk of malfunction, so that the assembly work is also very difficult and complicated.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and facilitates the processing of parts of the binding member, and secures and facilitates the work of fixing the wire to the binding member. An object is to provide an inexpensive and safe endoscopic treatment tool.

[0004]

A treatment instrument for an endoscope according to the present invention comprises a flexible sheath and a looped shape when the distal end side of the sheath is insertable in the sheath and pushed out from the sheath. A wire formed into a basket shape,
Wire operating means provided on the hand side for pushing and pulling the wire with respect to the sheath, a first tubular member and the first tubular member.
A second tubular member which is arranged on the inner diameter side of the tubular member and has an outer diameter smaller than the inner diameter of the first tubular member and through which the wire can be inserted. A binding member that fixes the distal end of the wire together with a filler on the inner diameter side and the outer diameter side of the second tubular member, and a stopper that is provided in the sheath and that restricts the movement of the binding member in the push-pull direction. And are included.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 relate to a first embodiment of the present invention. FIG. 1 is a cross-sectional view of a distal end portion of an endoscopic treatment tool, and FIG. 2 is an endoscopic treatment tool in a forceps channel of an endoscope. FIG. 3 is an explanatory view showing a state where the medical treatment is performed by incorporating it, and FIG.

In FIG. 1, the operating wire 2 is made of metal, for example, a stainless steel stranded wire or a single wire. The proximal end of the operation wire 2 is connected to the proximal operation unit 11 of the endoscopic treatment tool shown in FIG. 2, and the proximal operation unit 11 is connected to an external power source (not shown) for endoscopy. A high-frequency snare for a mirror is formed to configure the endoscopic treatment tool 1. The distal end side of the operation wire 2 is inserted through the inside of the sheath 3 and penetrates the binding member 4. Further, a half-moon shaped loop portion 5 is formed on the tip end side, and the tip end side end portion is fixed to the binding member 4. The operation wire 2 is movable with respect to the sheath by the operation from the proximal side operation unit 11. The loop portion 5 is made of metal, and is, for example, a stainless steel stranded wire or a single wire. FIG.
As shown in FIG. 3, the binding member 11 is made of metal, for example, two pipe-shaped tubular members made of stainless steel and having different diameters, and is fixed by a configuration in which a pipe 7 having a small inner diameter is passed inside a pipe 6 having a large inner diameter. doing. Pipe with small inner diameter 7
Is formed to be thicker than the outer diameter of the operation wire 2, and the inner diameter of the pipe 6 having a large inner diameter is larger than the outer diameter of the pipe 7 having a small inner diameter. In the binding member 4,
The pipe 7 having a small inner diameter has a hole 8 through which the operation wire 2 can be inserted.
The gap 9 between the pipe 6 having a large inner diameter and the pipe 7 having a small inner diameter is filled with wax, solder, adhesive or the like to fix the tip end of the wire.

The sheath 3 is made of a flexible resin, for example, a hollow tube made of fluororesin, olefin resin, vinyl chloride or the like. The wire forming the loop portion 5 and the operation wire are
The wires may be formed of the same wire, or separate wires may be connected.

A stopper 10 is disposed and fixed inside the sheath 3, and its position is at least a position which is shorter than the entire length of the loop part 5 when the loop part 5 is retracted from the tip. The stopper 10 is made of a metal, for example, a stainless steel pipe-shaped tubular member.

Next, the operation of this embodiment will be described.
First, as shown in FIG. 2, the endoscope 12 inserted into the body cavity
The endoscopic treatment tool 1 is inserted into the forceps channel 13, and the snare of the endoscopic treatment tool 1 is projected from the tip of the forceps channel 13. Endoscope bending operation, endoscope treatment tool 1
By the pushing and pulling operation of, the loop portion 5, that is, the tip of the high-frequency snare for endoscope is moved to a desired position.

Subsequently, as shown in FIG. 1, when the operating wire 2 is moved to the distal end side with respect to the sheath 3 by the operation of the hand side operating portion 11, it is bound to the stopper 10 fixed inside the sheath 3. The member 4 hits. Further, when the operation wire 2 is moved to the tip side, the wire 14 fixed to the binding member 4 does not move further to the tip side, and only the wire 15 movable with respect to the binding member 4 is moved to the tip side. Move to the side. As a result, a half-moon shaped loop portion 5 is formed on the distal end side of the sheath 3.

Subsequently, the desired polyp 16 is sandwiched in the formed half-moon shaped loop portion 5. In this state, the loop portion 5 is pulled back into the sheath 3 by operating the proximal side operating portion 11, whereby the loop portion 5 can be pulled to bind the polyp 16 tightly. After that, a high-frequency current is applied to the wire to excise the polyp 16.

According to the present embodiment, the binding member 4 is composed of two types of parts which can be formed by only cutting the pipe material, and therefore the holes 58, 59, 59, 59 in the conventional binding member 54 are formed.
Since the groove 60 is not required to be processed, the parts can be processed very easily. Further, also in the work of fixing the tip end of the wire to the binding member 4, the gap 9 filled with the solder, the solder, the adhesive or the like is formed in the hole 59 or the groove 60 for fixing the tip end of the conventional wire. Since it can be made relatively large, the work for filling and fixing the same becomes easy.

According to the present invention, it is possible to simplify the machining of parts, shorten the time required for the fixing work, and ensure the reliability.
A safe endoscopic treatment tool can be provided at a lower cost.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The second embodiment differs from the first embodiment only in the structure of the binding member. As shown in FIG. 4, the binding member 17 is made of metal, for example, two pipe-shaped tubular members of stainless steel having different diameters and lengths, and a pipe 19 having a small inner diameter is provided inside a pipe 18 having a large inner diameter. It is fixed in the passed configuration. The length of the pipe 19 having a small inner diameter is longer than that of the pipe 18 having a large inner diameter, and is arranged and fixed in a position in which both end surfaces of the pipe 19 having a smaller inner diameter project in the longitudinal direction than both end surfaces of the pipe 18 having a larger inner diameter. Has been done. Pipe with small inner diameter 19
The inner diameter of is larger than the outer diameter of the operation wire 2, and the inner diameter of the pipe 18 having a large inner diameter is larger than the outer diameter of the pipe 19 having a small inner diameter. In the binding member 17, the pipe 19 having a small inner diameter forms a hole through which the operation wire 2 can be inserted, and the gap 9 between the pipe 18 having a large inner diameter and the pipe 19 having a small inner diameter is filled with solder, solder, adhesive or the like. Fill and fix the tip end of the wire.

The operation of the second embodiment is similar to that of the first embodiment.

According to this embodiment, the length of the pipe 19 having the smaller inner diameter is longer than that of the pipe 18 having the larger inner diameter, and the pipe 19 having the inner diameter smaller than the end face of the pipe 18 having the larger inner diameter in the longitudinal direction. Since the end face is arranged and fixed at the projecting position, the pipe 19 having a small inner diameter due to the solder, solder, adhesive, etc., sticking out at the time of the operation of filling the gap 9 with solder, solder, adhesive, etc. Since it does not flow into the inner diameter side of the wire, that is, into the insertion portion of the operation wire, the work of fixing the distal end portion of the wire can be further facilitated.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The third embodiment shows a basket type forceps 20 which is an endoscope recovery tool of the endoscope treatment tools. As shown in FIG. 5, the basket portion 21 is made of four metal, for example, stainless steel stranded wire or single wire, of which two wires 29 are insertion holes 23 provided in the binding member 22. Insert the operation wire 24
, And its end is connected to a hand side operation unit (not shown). The other two wires 28 are fixed to the binding member 22 at their tip end portions.

As shown in FIG. 6, the binding member 22 is made of metal, for example, three pipe-shaped tubular members made of stainless steel, and two pipes 27 having a small inner diameter are provided inside a pipe 26 having a large inner diameter. It is fixed in the same configuration. The inner diameter of the pipe 27 having the smaller inner diameter is formed larger than the outer diameter of the wire 29, and the inner diameter of the pipe 26 having the larger inner diameter is larger than twice the outer diameter of the pipe 27 having the smaller inner diameter. In the binding member 22, the pipe 27 having a small inner diameter forms the holes 23 through which the wires 29 can be inserted, and the gap 9 between the pipe 26 having a large inner diameter and the pipe 27 having a small inner diameter is made of solder, solder, adhesive or the like. And wire 28
Fix the end of.

Further, the length of the pipe 27 having a small inner diameter is longer than that of the pipe 26 having a large inner diameter as in the second embodiment, and the pipe 26 having a large inner diameter in the longitudinal direction.
Both ends of the pipe 27 having an inner diameter smaller than those of both ends are arranged and fixed at positions where the both ends project.

Next, the operation of the third embodiment will be described. First, the basket type forceps 20 is inserted into the forceps channel of the endoscope inserted into the body cavity, and the basket portion 21 is projected from the tip of the forceps channel. By bending the endoscope and pushing and pulling the basket type forceps 20,
The basket portion 21 is moved to a desired position.

Then, as shown in FIG. 5, when the operation wire 24 is moved to the distal end side with respect to the sheath 3 by an operation from a hand side operation portion (not shown), the stopper 10 fixed inside the sheath 3 is moved. The binding member 22 hits against. Further, when the operation wire 24 is moved to the tip side, the wire 28 fixed to the binding member 22 does not move further to the tip side, and only the wire 29 movable with respect to the binding member 22 is moved to the tip side. Move to the side. As a result, the basket portion 21 is formed on the distal end side of the sheath 3 at a position eccentric with respect to the central axis of the sheath 3 in the longitudinal direction.

As shown in FIG. 7, a desired foreign substance 30 is put into the open basket portion 21, and in this state, the bust portion 21 is again moved to the sheath 3 by an operation from the operating portion on the proximal side.
The foreign matter 30 can be grasped by pulling it in. Then, the endoscope is removed from the body cavity to complete the collection of the foreign matter 30.

According to the present embodiment, the conventional binding member has three parts.
Even if it is necessary to provide holes at four or four places and it is difficult to process them, as in the first embodiment, the process is performed only by cutting the pipe material, and the assembly is done by brazing, soldering,
It is sufficient to fill the adhesive or the like once. Therefore, it is possible to provide an inexpensive and safe endoscopic treatment tool even for an endoscopic treatment tool having a more complicated wire structure than that of the first embodiment.

As described in detail above, according to the embodiment of the present invention, the following constitution can be obtained. [Supplementary Note 1] A sheath having flexibility, a wire formed so as to be insertable in the sheath and formed into a loop shape or a basket shape when the distal end side is pushed out from the sheath, and provided on the proximal side A wire operating means for pushing and pulling the wire with respect to the sheath, and a first tubular member and an outer diameter smaller than the inner diameter of the first tubular member, which is disposed on the inner diameter side of the first tubular member. And a distal end of the wire together with a filler on the inner diameter side of the first tubular member and on the outer diameter side of the second tubular member, the second tubular member having an inner diameter that allows the wire to be inserted therethrough. A treatment tool for an endoscope, comprising: a binding member that fixes the binding member; and a stopper that is provided inside the sheath and that restricts movement of the binding member in the push-pull direction. [Appendix 2] The endoscopic treatment tool according to Appendix 1, wherein the second tubular member is longer than the first tubular member. [Additional Item 3] The second tubular member is plural, and the inner diameter of the first tubular member is larger than multiple times the outer diameter of the second tubular member. Endoscopic treatment tool. [Additional Item 4] The endoscopic treatment tool according to Additional Item 1, wherein the wire is a high-frequency snare.

[0027]

As described above, according to the present invention, it is possible to easily process parts of the binding member, and also to easily and securely fix the tip end of the wire to the binding member, which is inexpensive and safe. It is possible to provide a simple endoscopic treatment tool.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a distal end portion of a treatment tool for an endoscope according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state in which the treatment tool for an endoscope according to the first embodiment of the present invention is incorporated into a forceps channel of an endoscope to perform treatment.

FIG. 3 is a perspective view showing a binding member according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a binding member according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view of the distal end portion of the endoscopic treatment tool according to the third embodiment of the present invention.

FIG. 6 is a perspective view showing a binding member according to a third embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a state in which a foreign object is gripped by the endoscopic treatment tool according to the third embodiment of the present invention.

FIG. 8 is a cross-sectional view of a distal end portion of a conventional endoscopic treatment tool.

FIG. 9 is a perspective view showing a binding member of a conventional endoscopic treatment tool.

FIG. 10 is a perspective view showing a binding member of a conventional endoscopic treatment tool.

[Explanation of symbols]

 1 Endoscopic treatment tool 2,24 Operation wire 3 Sheath 4,17,22 Bundling member 5 Loop part 6,18,26 Large inner diameter pipe 7,19,27 Small inner diameter pipe 9 Gap 10 Stopper

Claims (1)

[Claims] 1. A sheath having flexibility, a wire formed so as to be insertable in the sheath and having a distal end side formed into a loop shape or a basket shape when extruded from the sheath, and provided on the proximal side. A wire operating portion that pushes and pulls the wire with respect to the sheath, a first tubular member and an outer diameter that is disposed on the inner diameter side of the first tubular member and that is smaller than the inner diameter of the first tubular member. And a distal end of the wire together with a filler on the inner diameter side of the first tubular member and on the outer diameter side of the second tubular member, the second tubular member having an inner diameter that allows the wire to be inserted therethrough. A binding member for fixing the
A treatment instrument for an endoscope, comprising: a stopper that is provided inside the sheath and that restricts movement of the binding member in a push-pull direction.