JPH05317331A - Medical treatment tool - Google Patents

Abstract

PURPOSE:To easily select multiple electrodes for use by providing multiple electrodes having different shapes and reciprocatably inserted into a tubular treatment tool main body, and providing operation sections operating the electrodes respectively. CONSTITUTION:Multiple electrode bars 4 having different tip shapes are arranged in a tubular treatment tool main body 1, the electrode bars 4 are inserted into through holes of a support disk 6 in the main body 1 respectively, and they are supported slidably in the axial direction. Operation sections 14 are fitted at rear end sections of the electrode bars 4, and front projections 15 at the front sections of the operation sections 14 are inserted into guide holes 10. When one of the electrode bars 4 is to be used, the rear projection 16 of the desired operation section 14 is pushed in and slid along the guide hole 10, the rear projection 16 is moved to the guide hole 10 from a hook hole 12, and the tip section 5 of the electrode bar 4 is protruded from the tip of the main body 1. When a high-frequency current is fed to a connecting terminal 8 from a high-frequency oscillator, it is fed to the tip section 5 of the electrode bar 4 via the support disk 6, and an object can be treated with the high-frequency current.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical treatment instrument for electrically treating living tissue.

[0002]

2. Description of the Related Art Conventionally, there has been known a medical treatment instrument for cauterizing an affected tissue and stopping hemostasis. This treatment tool is provided with an electrode for passing a high-frequency current, and the treatment is performed by bringing the tip of this electrode into contact with the affected tissue.

There are various types of electrodes applied to such medical treatment tools according to the treatment site to be treated, and the surgeon appropriately replaces them when performing treatment. ..

[0004]

By the way, when a laparoscope such as an endoscope is used to treat a diseased part in a body cavity, if a conventional treatment tool having one electrode is used, it is possible to adjust to a treatment site. It is necessary to replace the electrode each time. Therefore,
As described above, it is very troublesome to replace the electrodes during the operation, and there is a problem that the treatment takes time. The present invention has been made in view of the above problems, and an object thereof is to provide a medical treatment tool in which a plurality of electrodes can be easily replaced and used.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a medical treatment instrument for electrically treating living tissue, and has a tubular treatment instrument main body and a shape inserted into the treatment instrument main body so as to be movable back and forth. Is provided with a plurality of different electrodes, and an operation unit for operating each electrode. Therefore, when the treatment tool is used, an electrode having a shape suitable for the region to be treated is selected, and the electrode is projected from the distal end portion of the treatment tool main body for treatment.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of a medical treatment tool according to the present invention.

As shown in FIG. 1, this medical treatment instrument includes a tubular treatment instrument body 1. A plurality of electrode rods 4 having different tip shapes are arranged in the main body 1, and the electrode rods 4 are respectively inserted into the through holes of the support disk 6 mounted inside the main body 1, It is slidably supported in the axial direction. A cord connecting terminal 8 is connected to the supporting disk 6 so as to be electrically connected to the electrode rod 4.

The treatment instrument main body 1 is constructed by covering the outer surface of a tubular member 2 with an insulating coating 3, and on the outer periphery of the treatment instrument main body 1, a plurality of elongated guide holes 10 in the axial direction are formed in the circumferential direction. They are formed at equal intervals along the line. Further, locking holes 12 are formed on the respective rear end sides of these guide holes 10.

An operating portion 14 made of an insulating material is attached to the rear end portion of each electrode rod 4, and a front projection 15 formed on the front portion of each operating portion 14 penetrates the guide hole 10 to operate. Part 1
It is guiding the forward and backward movement of 4. Further, the leaf spring-shaped rear projections 16 formed on the rear portions of the respective operation portions 14 are provided with the locking holes 12
And the guide hole 10 are selectively engaged with each other. A coil spring 18 in which each electrode rod 4 is inserted is provided between the front end of each operation portion 14 and the rear surface of the support disk 6.
Each operation portion 14 is biased rearward by this coil spring 18. The cover 17 is provided at the rear end of the treatment instrument body 1.
And a tube connecting cap 19 are provided.

In the treatment instrument constructed in this way, the main body 1
When one of the plurality of electrode rods 4 housed inside is used, the rear projection 16 is pushed in by pushing the desired rear projection 16 of the operating portion 14 and sliding it along the guide hole 10.
6 moves from the locking hole 12 to the guide hole 10. At the same time, the tip 5 of the electrode rod 4 projects from the tip of the main body 1.
Then, a high frequency current is supplied from a high frequency oscillator (not shown).
When it is supplied to the battery connection terminal 8, it is supplied to the tip portion 5 of the electrode rod 4 through the support disk 6, and the treated portion can be treated with a high frequency current.

Therefore, in the present embodiment, by simply sliding the operating portion 14, it is possible to select a tip-shaped electrode rod suitable for the treatment site, and it is possible to use a plurality of types of electrode rods without complicated operations. Next, a treatment tool according to the second embodiment of the present invention will be described.

In this embodiment, as shown in FIG. 2, the electrode rod housed in the treatment instrument main body 1 is divided into two parts, that is, the front electrode rod 20a and the rear electrode rod 20b at the intermediate portion. .. A rotary member 30 is rotatably provided in the front part of the treatment instrument body 1 in the circumferential direction, and each front electrode rod 20a is slidably inserted into a through hole of the rotary member 30. A conductive connecting member 24 is attached to the rear end of each front electrode rod 20a, and a coil spring 25 is provided between the connecting member 24 and the rotating member 30 by inserting each electrode rod. ..
The front electrode rods 20a are biased rearward by the coil springs 25. On the other hand, the rear electrode rod 20b is
While being inserted into the through hole of the support disk 6 as in the embodiment,
It is biased rearward by the coil spring 18. The rear electrode rod 20b is arranged at a position corresponding to the front electrode rod 20a. Therefore, when each operation portion 14 is moved forward and the rear electrode rod 20b is moved forward, its tip is electrically connected to the corresponding connection member 24. Further, by rotating the rotating member 30 in the circumferential direction, the combination of the front electrode rod 20a and the rear electrode rod 20b can be changed, and the orientation of the tip end portion 28 of the front electrode rod 20a can be changed.

In the treatment tool thus constructed, when the desired operating portion 14 is slid forward, the rear electrode rod 20
The tip of b contacts the rear end surface of the connecting member 24, and the front electrode rod 20a is slid forward. As a result, the tip portion 28 of the front electrode rod 20a projects from the tip of the treatment instrument body 1,
When a high-frequency current is supplied to the cord connecting terminal 8 from a high-frequency oscillator (not shown), the high-frequency current is supplied to the distal end portion 28 of the front electrode rod 20a via the support disk 6 and the rear electrode rod 20b, and the treated portion is supplied with the high-frequency current. Can be treated. In this embodiment, as in the first embodiment, a plurality of electrode rods can be replaced and used without complicated operations. Moreover, since the direction of the electrode tip can be easily changed, quick treatment can be performed. Next, a third embodiment of the present invention will be described.

As shown in FIGS. 3 (a) and 3 (b), the treatment instrument according to this embodiment has a multi-lumen main body 34.
And the plurality of electrodes 32 inserted in the plurality of lumens 35.
It is composed of. Each electrode 32 is covered with an insulating member 33 except for its tip. Then, as shown in FIG. 3 (b), the portions of the electrodes 32 not required for treatment are provided with an insulating coating of ceramics or the like to prevent cauterization of normal tissues other than the affected area. ing. The treatment tool of this embodiment has an extremely simple structure in which the plurality of electrodes 32 are inserted into the multi-lumen-shaped main body 34, so that the treatment tool is easy to manufacture and has few failures.

As shown by the arrow in FIG. 3 (a),
If the two electrodes 32 arranged adjacent to each other are configured to be rotatable about their respective axes, the lesioned part can be grasped and peeled by the tip parts of these electrodes. FIG. 4 shows a fourth embodiment of the present invention.

This embodiment is constructed by inserting a plurality of electrodes 32 into a multi-lumen main body 40 as in the third embodiment, but as shown in FIG. The men 42 are open to the side. Thus, multiple electrodes can be used and the tips of the electrodes can be oriented in various directions. It should be noted that the number of the lumens 42 that are open to the side of the main body 40 is not limited to one and may be multiple. Next, a fifth embodiment of the present invention will be described.

As shown in FIGS. 5 and 6, this treatment instrument has a main body 50, and two wire electrodes are inserted through the main body 50. One of the bent electrodes 52a is a base-side through hole 56 of a pair of through-holes 56 formed at the tip of the insulating sheath 54 at predetermined intervals along the axial direction.
To the outside, is inserted again through the through hole 56 on the front end side, and the front end is fixed by the wire mounting tube 58. The other straight type electrode 52b is
Inserted straight into the insulating sheet 54, the insulating sheet 5
No. 4 protrudes through a guide tube 57 provided at the tip opening.

A grip portion 51 is provided on the proximal side of the treatment instrument body 50, and two electrodes 52a and 52b extend rearward through the grip portion 51 in the axial direction as shown in FIG.
The rear ends of the electrodes 52a and 52b are code connection terminals 6
0 respectively. The rear end of the bent electrode 52a is fixed to the operation portion 62. A slide pipe 64 extending forward is attached to the operation portion 62. The slide pipe 64 loosely fits the rear end portion of the bendable electrode 52a, and an O-ring 66 is interposed between the slide pipe 64 and the grip portion main body. It is inserted and slidable.

An insulating sheath 54 is attached to the front portion of the grip portion 51, and a tube connection mouthpiece 68 is formed on the side of the grip portion main body. Then, air can be supplied through the insulating sheath 54 by an air supply device (not shown) through the tube base 68. A coil member 55 is inserted into the insulating sheet 54 to prevent the insulating sheet 54 from being crushed or deformed.

In the treatment instrument thus constructed, when the straight type electrode 52b is used, the straight type electrode 5 is used.
By pushing and pulling an operating portion (not shown) connected to 2b, the amount of protrusion of the straight type electrode 52b protruding from the tip of the insulating sheath 54 is adjusted to perform treatment. On the other hand, when the bendable electrode 52a is used, the operation portion 62 connected to the bendable electrode 52b is pulled backward to bend the tip portion of the main body 50 in an arc shape as shown in FIG. Treatment with the mold electrode 52a is performed. It is also possible to use both together. Also in this embodiment, different electrodes can be selected and used by a simple operation as in the previous embodiment, so that smooth treatment can be performed.

[0021]

As described above, in the medical treatment tool of the present invention, an electrode having a shape suitable for the treatment site is selected,
The electrode can be used by protruding from the tip of the treatment instrument body. Therefore, a plurality of electrodes can be used by a simple operation, and a smooth treatment can be performed.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a medical treatment tool according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of a medical treatment tool according to a second embodiment of the present invention.

3A is a perspective view showing a distal end portion of a medical treatment tool according to a third embodiment of the present invention, and FIG. 3B is a side view of one electrode shown in FIG.

FIG. 4 is a sectional view showing a distal end portion of a medical treatment tool according to a fourth embodiment of the present invention.

FIG. 5 is a side view of a medical treatment tool according to a fifth embodiment of the present invention.

6 is a cross-sectional view showing a distal end portion of the medical treatment tool shown in FIG.

7 is a cross-sectional view showing a proximal end portion of the medical treatment tool shown in FIG.

FIG. 8 is a cross-sectional view showing a usage state of the medical treatment tool according to the fifth embodiment.

[Explanation of Codes] 1, 34, 40, 50 ... Treatment tool main body, 4, 20a, 20
b ... Electrode rod (electrode), 32, 52a, 52b ... Electrode, 1
4, 62 ... Operation part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyotoshi Sakashita 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Koji Iida 2-43-2 Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Takao Tabata 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Hiroyuki Kusu 2-43-2 Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Kazuhiko Ozeki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Tsukagoshi, 2 43-2 Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Tadao Hagino 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus The Optical Industry Co., Ltd.

Claims (1)

[Claims] 1. A medical treatment instrument for electrically treating living tissue, comprising a tubular treatment instrument main body, a plurality of electrodes of different shapes which are inserted into the treatment instrument main body so as to advance and retract, and each electrode. A medical treatment tool comprising: an operating section for operating.