JPH02239855A - Treatment appliance for endoscope - Google Patents

Abstract

PURPOSE:To simplify the incorporating work of a wire into a mantle tube and to eliminate of the loss of a press-in quantity due to the slack of an operating wire to the press-in quantity in a hand operating part by cravenly forming either of an extending part wire or operating wire introduced into the mantle tube into the mantle tube and fittingly fixing it to the other. CONSTITUTION:At least one elastic wire 11 amount plural elastic wires 11 to compose a basket is made by extending the rear end side, and such an extending part wire 13 is connected through an operating member 8 to the slider of an operating part in the same way as an operating wire 7 by being extended to the vicinity of a band. Further, the extending part wire 13 is positioned in the neighbor of one side of the operating wire 7 between a connecting tube 9 and the operating member 8, and simultaneously, it is bent plural times. The valley part of each curving part 14 is fixed to the operating wire 7 by a means 15 such as a brazing and clamping, and plural sliding parts 16 projected in curving in a mountain shape from the operating wire 7 between respective means 15 are formed.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is characterized in that an operating wire advances and retreats within a mantle tube, and a treatment section attached to the tip of the manipulator wire protrudes and retracts from the tip of the mantle tube. The present invention relates to an endoscopic treatment tool.

[Prior Art] This type of endoscopic treatment tool includes, for example, basket-type forceps for collecting foreign matter in a body cavity.

Utility Model Publication No. 62-14811 was developed to prevent the basket portion from falling off due to the load applied to the operating wire when grasping a foreign object in a body cavity with the basket portion.
There is a publication number.

[Problems to be Solved by the Invention] In the Utility Model Publication No. 1481/1983, at least one elastic wire b of the elastic wires forming the basket part a is extended as shown in FIG. This is a structure in which the portion b' is arranged in parallel to the operating wire C. For this reason, if relatively thick elastic wires b1 and operating wires C are used, the overall diameter becomes large, making it impractical.

Therefore, they must be made as thin as possible. However, on the other hand, the gap with the inner surface of the outer tube d becomes larger.

Therefore, as shown in FIG.
With respect to D, before the basket part a protrudes, the extending part b' of the elastic wire b and the operating wire C bend, and after coming into contact with the inner wall of the mantle cove d, the basket part a does not protrude. The pushing amount β of the operation part e is insufficient. For this reason, if the pushing amount ρ is not increased, it becomes difficult to make the basket 1, part a, completely protrude outside from the tip of the mantle tube d.

However, there is a condition that the pushing amount Ω of the operating part e must be within the range that can be moved by the operator's hand.
It cannot be made bigger easily.

On the other hand, as shown in Fig. 7, if one or the other of the wires b and c is slightly loosened, it is necessary to clean it after use, and when pulling out the operating wire C from the mantle tube d and reinserting it, As shown in FIG. 7, the slack is concentrated at one end of the operating wire C, making the assembly work extremely troublesome.

The present invention has been made with attention to the above-mentioned problems, and its purpose is to simplify the work of assembling the wire into the mantle tube, and to reduce the slack of the operating wire relative to the pushing amount Ω at the hand operation section. It is an object of the present invention to provide a treatment tool for an endoscope that eliminates loss of the amount of pushing and can reliably prevent a treatment part from protruding from the tip of a mantle tube.

[Means for Solving the Problems] In order to solve the above problems, the endoscopic treatment instrument of the present invention has the following features:
A mantle tube, an operation wire that is inserted into the mantle tube so as to be freely advanced and retractable and is moved forward and backward by operation from the proximal side, and a treatment operation is carried out at the distal end side of the mantle tube by the operation wire that is attached to the tip of the mantle tube and moved back and forth. A treatment section configured using an elastic wire, an extension wire in which at least one end of the elastic wire forming the treatment section is extended and introduced into the mantle tube, and a combination of the extension wire and the operation wire. It is provided with a plurality of curved parts, one of which is formed by being curved within the mantle tube and which is attached and fixed to the other.

Therefore, in the endoscopic treatment instrument according to the present invention, the loss of the pushing amount at the operating section due to deflection of the operating wire or elastic wire within the mantle tube is extremely reduced, and the treatment section at the tip of the mantle tube is securely held. can be operated.

Embodiment FIGS. 1 and 2 show a first embodiment of the present invention. Reference numeral 1 in FIG. 1 is a flexible tube constituting the mantle tube. This tube 1 can be inserted into an insertion channel of an endoscope (not shown). Further, as shown in FIG. 2, a liquid feeding mouthpiece 2 is connected to the base end of the tube 1, and an operating section 3 is connected via this liquid feeding mouthpiece 2. The operating section 3 consists of a slider 4 and a slide body 5 that slides and guides the slider in the front and rear directions, and the operator can operate the slider 4 by placing his or her finger on a finger hook 4a provided on the slider 4. Note that the liquid feeding mouthpiece 2 is provided with a liquid inlet 6 that communicates with the inside of the tube 1 .

As shown in FIG. 1, a flexible operating wire 7 is inserted into the tube 1 so as to be freely advanced and retracted. The base end of the operating wire 7 is connected to the slider 4 of the operating section 3 via the operating section 8. Therefore, by moving the slider 4 back and forth as described above, the operating wire 7 can be moved back and forth.

Furthermore, a foreign object grasping basket 10 serving as a treatment section is attached to the tip of the operating wire 7 via a connecting tube 9.

As shown in FIG. 1, the baskets 1 and 10 are constructed in a basket shape using a plurality of elastic wires. That is, the tips of each elastic wire 1 are bound by a tip 12, while the rear ends of each elastic wire 1 and the tip of the operating wire 7 are fixed by the connecting tube 9. However, it constitutes a so-called basket forceps in which the basket 10 is thrust and retracted from the tip of the tube 1 using the operating wire 7.

Further, at least one elastic wire 11 among the plurality of elastic wires 1 constituting the basket 10 has its rear end extended, and this extended width portion wire 13 extends to the hand and connects with the operating wire 7. Similarly, it is connected to the slider 4 of the operating section 3 via the operating section casing 8.

Further, the extending portion wire 13 is connected to the connecting pipe 9 and the operating member 8.
It is located adjacent to one side of the operating wire 7 and is curved multiple times. The valley portion of each curved portion 14 is fixed to the operating wire 7 by means 15 such as brazing or fastening, and a plurality of sliding portions 16 protrude from the operating wire 7 in a curved manner between the respective means 15. is forming. Note that the degree of overlap between the operation wire 7 and the extension wire 13 is as follows.
Even on the side where it curves and protrudes, or its operation wire 7
It can also be next to

When using this endoscopic treatment tool, the tube 1 is inserted into the body cavity with the basket 10 housed in the tube 1 through the channel of the endoscope that has been inserted into the body cavity in advance.

Then, under observation using an endoscope, the tip of the tube 1 is brought close to the foreign object to be removed.

Here, by pushing the slider 4 in the operation part 3 toward the tip side, the basket 10 is pushed out from the tip of the tube 1 via the operation wire 7, and the basket 10 opens into a basket shape by its own elastic restoring force. Foreign matter is taken into the interior through the gap between the elastic wires 11. Then, when the foreign object has definitely entered the basket 10, pull the slider 4 of the operation section 3 backward and remove the basket 1.
0 to reliably grip the foreign object. In this state, the endoscope is pulled out of the body cavity and the foreign object is removed.

By the way, a plurality of curved portions 14 are formed on the extended portion wire 13 of the elastic wire 11 extending parallel to the operating wire 7, and these are fixed to the operating wire 7. When the slider 4 of the operating section 3 is moved to project the basket 11, the tube 1
Each sliding part 16 does not bend inside. Therefore, there is no loss ρ1 of the pushing amount ρ in the operation unit 3, and the basket 11
The operation of protruding the tube 1 from the tube 1 can be performed reliably.

FIG. 3 shows a second embodiment of the invention. In this embodiment, the bending part 14 is formed in the operating wire 7 instead of the extending part wire 13, and the operating wire 7 and the spreading part wire 13 are fixed by the fixing means 15 in the same manner as described above, and the bending part of the operating wire 7 is fixed. The portion 14 constitutes a sliding portion 16. Further, the portion forming the curved portion 14 is not limited to the entire length, but is particularly limited to the tip side portion. The rest is the same as that of the first embodiment.

FIG. 4 shows a third embodiment of the invention. In this embodiment, the extending portion wire 13 is curved over each adjacent outlet side of the operating wire 7, forming curved portions 14 that alternately project in opposite directions, and each curved portion 14 is fixed to the operating wire 7. did.

Further, the portion forming the curved portion 14 is not limited to the entire length, but is limited to the distal end portion and the proximal end portion. Other points are the same as in the first embodiment.

In this embodiment, since the curved portions 14 are adjacent to both sides of the operating wire 7, the operating wire 7 and the basket 11 attached thereto can be located at the center of the axis of the tube 1.

FIG. 5 shows a fourth embodiment of the invention. The treatment instrument in this embodiment is related to a high-frequency snare, and a snare loop 17 is connected to the tip of the operating wire 7 via a connecting tube 9 instead of the basket 11 in the first embodiment.
is provided. Further, the operating member 8 on the hand side is electrically connected to a plug (not shown) in the slider 4 of the operating section 3. The anchor extension wire 13 has a plurality of curved portions 14 continuously formed over the entire length between the connecting pipe 9 on the front end side and the operating member 8 on the rear end side. Each curved portion 14 is fixed to the operating wire 7 by means 15 such as brazing.

Then, using the snare loop 17 to grasp the polyp in the body cavity using the same procedure as in the first embodiment,
To be tied up. Then, the high frequency current is applied to the snare loop 17.
energizes and removes the polyp.

Note that the present invention is not limited to the above embodiments. For example, the sliding portion 16 may be formed by replacing the operating wire 7 and the extension wire 13 in the third and fourth embodiments. Further, in the fourth embodiment, the curved sliding portion 16 may be formed only at the distal end portion and the proximal end portion of the operating wire 7. Also,
In the fourth embodiment, curved portions may be formed on both sides of the operating wire 7 as in the third embodiment.Furthermore, in this embodiment, the operating wire 7 and the extension wire 3 may be interchanged. A sliding portion 16 may also be formed. Furthermore, the endoscopic treatment instruments are not limited to basket-type forceps and high-frequency snares, but any treatment instrument whose treatment section protrudes and retracts from the mantle tube by advancing and retracting the sliding section is applicable.

[Effects of the Invention] As explained above, according to the present invention, since the treatment section protrudes from the mantle tube, when the operation wire is pushed in, the operation section does not bend due to the action of the sliding part within the mantle tube. There is no loss in pushing amount.

Therefore, the treatment section on the distal end side can be reliably operated and can be reliably protruded from the distal end of the mantle tube.

Moreover, the work of assembling the wire into the mantle tube becomes easy and simple.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing a first embodiment of the invention, FIG. 2 is a perspective view of the first embodiment, and FIG. 3 is a side sectional view showing a second embodiment of the invention. , FIG. 4 is a side sectional view showing the third embodiment of the present invention, FIG. 5 is a side sectional view showing the fourth embodiment of the invention, and FIGS. 6 (A), (B), and (C) are An explanatory diagram of a conventional treatment instrument, FIG. 7 is a side view of the conventional treatment instrument. 1...Tube, 3...Operation unit, 7...Operation wire, diagram

Claims (1)

[Claims] A mantle tube, an operating wire that is inserted into the mantle tube so as to be freely advanced and retractable and is moved forward and backward by operation from the proximal side, and a treatment operation is performed at the distal end side of the mantle tube by the operation wire being attached to the tip of the mantle tube and moving back and forth. a treatment section configured using an elastic wire; an extension wire in which at least one end of the elastic wire constituting the treatment section is extended and introduced into the mantle tube; and either the extension wire or the operation wire. A treatment instrument for an endoscope, characterized in that it comprises a plurality of curved parts formed by curving one part within the outer tube and fixedly attached to the other part.