JPS6397153A - Treatment tool for endoscope - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to treatment tools for endoscopes, more specifically, grasping forceps, high-frequency knives, etc. that are used by being inserted into the forceps channel of an endoscope. The present invention relates to the structure of treatment instruments, operating wires, etc.

[Prior Art] As is well known, an endoscope inserted into a body cavity is composed of an operating section main body 11 and a body cavity insertion section 12, as shown in FIG. is provided with an eyepiece section 13 through which the surgeon observes the affected area and a bending operation knob 19.

A forceps channel 15 is provided from the operation section main body 11 to the body cavity insertion section 12 through which a treatment tool 14 such as a grasping forceps or a high-frequency knife is inserted. The treatment instrument 14 inserted into the forceps channel 15 enters and exits from the treatment member at its distal end, the gripping section, or the distal end 16 of the body cavity insertion section, and collects cells or extracts cells under endoscopic observation. Excise the affected area. - The treatment tool 14 uses the handle 17 as a guide,
By moving the operating slider 18 that is slidable in the longitudinal direction, the distal treatment member and the gripping section are operated via the operating wire. Further, the distal end portion 16 of the intrabody cavity insertion portion 12
The curved tube section 12A on the side has an extremely flexible structure, and the distal end section 16 can be curved in a desired direction by operating the curve operation knob 19.

FIG. 7 shows the main part of the tip of a conventional three-claw type, tripod j, (IJ forceps r) that is inserted into the forceps channel 15, and the tip tube part has a pin 7 for opening and closing the forceps. 8 is fixed at the tip by adhesive etc. Inside the flexible tube 6, there are four relatively hard hand operation wires 4B,
It consists of an operating wire 4A that is relatively soft and is located in the curved tube portion 12A, and a gripping portion 2゜2' (one not shown) that is formed of three elastic bodies. Forceps have been inserted. Then, the connection points of each member are covered with connection pipes 3A and 3B, and brazed or soldered.
(Both are connected by =1.

That is, the gripping parts 2, 2' and 1.
As shown in FIG. , from the other side of the pipe 3A, the tip of the operating wire 4A is connected to one end, and the low is injected from the low inlet 3Aa of the same pipe to the grip part 2.2'.
, 2' are connected to the operating wire 4A. On the other hand, as shown in FIG. 7, the operation wire 4A on the treatment section 10A and the operation wire 4B on the hand operation side are connected to each other by inserting the operation wire 4A into the pipe from one side of the connecting pipe 3B.
At the same time, fit the rear end of the operation wire 4B from the other side of the pipe 3B, and connect the low injection port 3Ba of the same pipe.
A low voltage flows in from the terminal to connect both wires 4A and 4B.

Moreover, when the above-mentioned soft operation wire 4A is not used,
The tip of the operating wire 4B is inserted into the connecting pipe 3A to directly connect the gripping portions 2.2', 2' and the operating wire 4B.

[Problems to be Solved by the Invention] By the way, it is difficult to connect the operating wire to a treatment member such as a conventional three-prong forceps or tripod forceps configured as described above, or to connect the operation wire next to the treatment member. There were some problems with the connection between the hand control wire and the wire.

That is, the proximal ends of the three gripping parts constituting the three-claw forceps, tripod forceps, etc. are connected to one side of the connecting pipe 3A, and the operating wire 4A on the side of the treatment member or the operating wire 4B on the hand side When brazing or soldering the tips of one to the other, hold the three grips at equal angular positions before brazing.
If an attachment failure occurs, the gripping part will fall off from the pipe, and the tip claws of the gripping part will not be aligned or arranged at 120° intervals and will be connected. The connection point becomes thicker and heavier due to the wall thickness of the connection pipes 3A and 3B, and furthermore, the row with a row or half mark 111 sinks into the surrounding area, so the hard length becomes longer and the wire Because it is thicker than the diameter,
The diameter of the forceps as a whole becomes thicker, making them heavier to operate. As is well known, since the body cavity insertion part 12 is inserted into the body cavity, it is undesirable for the entire forceps to be thick and difficult to operate. Pipe part 12
Since A is largely bent and curved in the desired direction,
The long hard length at the connection point between the grip portion and the operating wire 4A was a fatal flaw.

Therefore, the object of the present invention is to -] An endoscope that eliminates the problems of connecting a treatment member such as a conventional three-pronged forceps and an operating wire, or connecting operating wires to each other; The aim is to provide treatment tools for

"Means and effects for solving the problems" In the present invention, in order to solve the problems described in "-", there is a connection between the wire around the treatment member and the proximal end of the treatment member, and a gripping section consisting of a plurality of wires. At least one of the following: integration of the proximal end of the treatment member such as, connection of the proximal end of the treatment member to the wire on the hand operation side, connection of the wire on the hand operation side to the wire on the treatment member. This method is characterized in that one part is performed by plasma processing.

[Example] Hereinafter, the present invention will be specifically described with reference to the drawings.

In addition, regarding the component part 10 that is exactly the same as the component part in the conventional example shown in Figures 7 and 8 above, please refer to the same item (=J), and the explanation is 1 (avoid doing)

FIG. 1 shows a first embodiment of the present invention, and the three-pronged forceps 1 may be constructed in substantially the same manner as the conventional forceps, or may have three gripping forceps as shown in FIG. The base ends of the parts 2, 2' and 2' are integrated into a base end part 10 by plasma welding, and then fitted into one side of the connecting pipe 3, and connected to the tip of the operating wire 4 fitted into the other side. Connected by brazing or soldering.

FIG. 3 shows a modification of the first embodiment, in which the three-pronged forceps 1 does not use the connecting pipe 3, and each gripping part 2.2' of the three-pronged forceps 1 is
, 2' are integrated by plasma welding to form one base end 10, which is then integrally connected to the tip of the operating wire 4 by plasma welding. In this way, the three-pronged forceps 1 can
Since the gripping portions 2.2' and 2'' of the book are integrated by plasma welding, a three-pronged forceps is obtained in which the tips of the gripping portions are aligned at 120° intervals and aligned in the same direction.

FIG. 4 shows a second embodiment of the present invention, in which a wire 4B on the hand side and a wire 4A on the treatment member are connected.
The connection is made by plasma welding without using the connection pipe 3, and the welded part 5 has almost the same wire diameter and weight as the non-welded part of the operating wire 4, and the hard length t.
It's also short.

As is well known, plasma welding is a processing method in which a high-voltage current is passed through the corrugated workpiece, melting the counter electrode part, and welding or rounding the workpiece, so that the two welded parts are structurally integrated. , a highly reliable product can be obtained.

Furthermore, the connection means according to the present invention disclosed in FIGS. 1 to 4 is equivalent to the connection means using a conventional connection pipe and soldering or soldering, without using the connection pipe 3. Or even higher connection strength can be obtained.

FIG. 9 shows an example of a conventionally used wire-shaped high-frequency knife-type treatment instrument. In this wire-shaped high-frequency knife-type treatment tool, the tip of the wire 21 forming the high-frequency knife 21A is fixed to the tip 22 fixed in the i+f flexible tube 6 by brazing, and then
A part of the wire 21 is exposed outside the tube and the knife 21 is inserted.
A is formed and the wire drawn into the tube 6 again is used as an operating wire and connected to the operating slider 18 shown in FIG. The high-frequency knife-type treatment tool configured in this manner is used to operate the operation slider 18 to treat polyps or the like between the knife 21A and the flexible tube 6, which are exposed to the outside of the flexible tube 6. The affected part is held in place and a high frequency current is applied to the knife wire 21 from a power supply device (not shown) to cut the affected part. At this time, a contrast medium may be injected into the space inside the flexible tube 6 due to surgical necessity.
Since the space where the distal tip 22 was welded was that much narrower, the ability to inject the contrast medium was low. Therefore, in the present invention, as shown in FIG.
If an extra length is provided at the tip of 1 and the tip is rounded by plasma welding, a spherical stopper 20 can be obtained, which satisfies the function of a wire-shaped high-frequency knife-type treatment instrument, and can also be used to remove contrast media. or injected without any particular resistance.

[Effects of the Invention] As described above, according to the present invention, (1) in three-prong forceps or tripod-type forceps, the three gripping parts are
Since the proximal end portion is integrated by plasma welding before being connected to the operating wire, it is possible to eliminate the possibility of the gripping portion falling off or having poor shaping.

(ii) Since the gripping part with the integrated base end is connected to the operating wire by plasma welding, the outer diameter of the connection point is finished to be the same as or larger than the outer diameter of the operating wire, and The hard length of the part that becomes hard as it is connected can be shortened. In addition, the operation wires are also connected by plasma welding, so
Since the same effects as described above can be obtained, the body cavity insertion section can be made thinner, lighter, and more flexible than conventional ones.

(m) Since a connecting pipe is not used to connect the wires, the diameter of the connecting portion does not depend on the diameter of the wire. Therefore, when transferring liquid using a flexible tube, its liquid sending capacity Go -1.

−same Remarkable effects such as

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view of the main part of the tip of three-pronged forceps showing a first embodiment of the present invention, and FIG. 2 is an exploded perspective view showing the gripping part, operating wire, and connecting pipe in FIG. 1. 3 is a side view showing a modification of the three-pronged forceps in which the connecting pipe is omitted in FIG. Figure 5 is an enlarged cross-sectional view of the main part of the connection point between the control wire and the operation wire on the hand control side, and the wire-shaped high-frequency knife piece! FIG. 6 is a perspective view of an endoscope; FIG. 7 is an example of conventional Miki-style forceps. FIG. 8 is an exploded perspective view showing the gripping part, the operating wire and the connecting pipe in FIG. 7, and FIG. 9 is an enlarged sectional view of the main part of the tip. FIG. FIG. 3 is an enlarged cross-sectional view of the main part of the tip showing an example. 2.2', 2'...Gripping part 4......Operating wire 4A...
...Operating wire 4B next to the treatment member...
・・Operation wire 10 for hand operation・・・・・・・・・・
proximal end

Claims (1)

[Scope of Claims] Connection of the wire next to the treatment member and the proximal end of the treatment member, Integration of the proximal end of the treatment member such as a plurality of grips, The wire and the treatment member next to the hand operation A treatment instrument for an endoscope, characterized in that at least one of the following is performed by plasma processing: connection of the proximal end of the device; and connection of the wire on the hand operation side and the wire on the treatment member.