JPH08317932A - Endoscope treatment apparatus - Google Patents

Abstract

PURPOSE: To make it possible to snipe at an affected part from the front easily with simple construction with high operation and insertion performance. CONSTITUTION: An endoscope treatment apparatus having a flexible shaft 13 inserted movably into a treatment apparatus insertion channel for the endoscope, wherein a bendable part 14 which can be bent in a certain direction with small contraction and expansion in the axial direction is formed on the tip of the flexible shaft 13.

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 having a flexible shaft which is inserted into a treatment instrument insertion channel of an endoscope so as to advance and retract.

[0002]

2. Description of the Related Art Generally, a treatment tool for an endoscope has a flexible shaft formed of a tightly wound stainless steel coil or the like, and a treatment piece is attached to the distal end thereof.

[0003]

When the affected part is sniped with such a conventional treatment tool, the distal end portion of the flexible shaft 91 of the treatment tool is inserted into the treatment tool insertion channel of the endoscope 92 as shown in FIG. It is projected straight from 93 to the affected area. Therefore, an accurate treatment cannot be performed on the affected area A or the like that cannot be located in front of the endoscope 92.

Therefore, if the flexible shaft 91 is further pushed out from the treatment instrument insertion channel 93 while the distal end of the endoscope treatment tool is pressed to the vicinity of the affected part, the flexible shaft 91 bends and the direction of the tip changes. Since stainless steel coils and the like have a strong elasticity, the bent portion bounces, the tip of the treatment instrument comes off the affected portion, and eventually returns to the original straight state.

Therefore, there is a flexible shaft 91 in which the tip portion can be flexibly bent by remote control (Japanese Utility Model Publication No. 52-22146, Japanese Utility Model Publication No. 1-119).
No. 621).

However, in such an endoscopic treatment instrument,
Since it is necessary to perform a treatment operation and a bending operation with the operation portion of the treatment tool, the operability is very poor, and it is not easy to bring the tip into contact with the affected area from the front side. Since the operation wire for operation and the operation wire for bending operation are inserted side by side, the flexible shaft becomes hard and the insertability into the treatment instrument insertion channel deteriorates.

It is therefore an object of the present invention to provide an endoscopic treatment tool which has good operability and insertability, and has a simple structure to easily aim at a diseased part from the front.

[0008]

In order to achieve the above object, a treatment instrument for an endoscope according to the present invention has an endoscope having a flexible shaft which is inserted into a treatment instrument insertion channel of the endoscope so as to be able to advance and retract. The treatment tool for a mirror is characterized in that a bendable portion which has a small elasticity in the axial direction and is bendable in a fixed direction is formed at a distal end portion of the flexible shaft.

[0009]

Embodiments will be described with reference to the drawings. Figure 1
Although the distal end portion of the endoscopic treatment tool 10 according to the first embodiment of the present invention is shown, the endoscopic treatment tool 10 is inserted into the endoscope 1 as shown in FIG. It is used by being inserted into the channel 2 so that it can move back and forth.

The treatment instrument 10 for an endoscope is constructed by connecting a distal treatment piece 11 and an operating portion 12 on the proximal side by a flexible shaft 13, and performs operations such as opening and closing of the distal treatment piece 11. ,
It can be performed by remote control from the operation unit 12 side.

The flexible shaft 13 is formed by a so-called close-wound coil in which a thin stainless steel wire is closely wound to the same diameter over almost the entire length. As shown in FIG. 1, the flexible shaft 13 can be bent only in a fixed direction. The flexible portion 14 is formed only on the tip portion of the flexible shaft 13. The length of the flexible shaft 13 is, for example, 1 to 2 m, and the length of the bendable portion 14 is, for example, about 5 to 30 mm.

In this embodiment, the endoscopic treatment tool 1 is used.
Reference numeral 0 is a biopsy forceps, and a pair of forceps cups 11b opened and closed by a link mechanism 11a is provided on the distal treatment piece 11 portion.
Is provided. An operation wire 16 that is operated to move back and forth from the operation portion 12 side to operate the link mechanism 11a is inserted into the flexible shaft 13 so as to be movable back and forth over the entire length.

The bendable portion 14 is composed of node pipes 14a made of a stainless steel pipe and formed in the shape of a short cylinder so as to be rotatable relative to each other. Both ends of the front and rear ends of each node ring 14a are connected to each other. A pair of left and right tongues are provided on the respective parts so as to project, and are rotatably connected to the tongues of adjacent node rings 14a and rivets 14b. The operation wire 16 is inserted inside the node ring 14a group.

As shown in FIG. 1, the front and rear end surfaces of each node ring 14a are formed as slopes that are farther away from the end surfaces of the adjacent node rings 14a as they go outward. Therefore, the bendable portion 1
In No. 4, each node ring 14a can freely rotate about each rivet 14b, and can be freely bent in the same direction as the opening / closing direction of the distal treatment piece 11 to the extent that the slope collides with the adjacent node ring 14a. . However, it does not expand or contract at all in the axial direction.

When using the endoscopic treatment instrument 10 of the embodiment thus constructed, first, as shown in FIG. 3, the distal end portion of the treatment instrument 10 is inserted into the treatment instrument insertion channel of the endoscope 1. The distal treatment piece 11 is pushed out onto the portion having the affected area A by protruding from 2.

After that, as shown in FIG. 4, when the flexible shaft 13 is further pushed out, the bendable portion 14 bends with the distal treatment piece 11 pressed near the affected area A as a fulcrum. The orientation of the distal treatment piece 11 is changed, and the distal treatment piece 11 can be brought into contact with the affected area A from the front.

As a result, in the case of such a biopsy forceps, the biopsy tissue of the affected area A can be accurately collected, and even if the endoscopic treatment tool 10 is of a type other than the biopsy forceps, the affected area A can be obtained. Can be accurately treated.

FIG. 5 shows a second embodiment of the present invention, in which the structure of the bendable portion 14 is the same as that of the first embodiment, and the bendable portion 14 with respect to the opening / closing direction of the distal treatment piece 11 is shown.
The bending direction of is rotated by 90 °. As described above, the bending direction of the bendable portion 14 may be set as desired.

6 and 7 show the third and fourth embodiments of the present invention, in which the present invention is applied to grasping forceps. In the third embodiment, a crocodile-shaped gripping piece 11c is attached instead of the forceps cup 11b of the first embodiment.

In the fourth embodiment, a gripping piece 11d made of an elastic wire is attached, and a flexible coil portion 11e for pulling in the gripping piece 11d includes a bendable portion 1.
4 is formed on the front side.

FIG. 8 shows a fifth embodiment of the present invention in which a brush 11f for scraping cytodiagnosis is attached to the tip treatment piece 11 portion. With this arrangement, as shown in FIG. 8, by moving the flexible shaft 13 that is not parallel to the mucosal surface, the brush 11f can be moved back and forth along the mucosal surface, and reliable cytodiagnosis is performed. be able to.

The concrete structure of the bendable portion 14 of the present invention is not limited to the above-mentioned embodiments, and as shown in FIG. 9, for example, a flexible rod-like elastic material such as silicon rubber is used. A material in which V-shaped cuts 14d are alternately formed from opposite directions may be used as the material 14c. 14e is a hole for passing an operation wire or the like.

[0023]

According to the present invention, the distal end portion of the treatment tool is internally viewed by forming the flexible portion at the distal end portion of the flexible shaft, which has a small elasticity in the axial direction and can be bent in a fixed direction. When it is pushed out from the treatment tool insertion channel of the mirror and pressed against the affected part and the flexible shaft is further pushed out, the bendable part bends around the tip part pressed against the affected part as a fulcrum and the direction of the tip part changes and the affected part changes. Can be contacted from the front. Therefore, it is possible to easily aim at the affected area from the front with a good operability and a simple structure, and since a bending operation wire or the like is not required, the insertability into the treatment instrument insertion channel is also good.

[Brief description of drawings]

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

FIG. 2 is an overall side view of a use state of the endoscope treatment tool of the first embodiment.

FIG. 3 is a side view of the distal end portion of the endoscope treatment tool of the first embodiment in a used state.

FIG. 4 is a side view of the distal end portion of the endoscope treatment tool of the first embodiment in a used state.

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

FIG. 6 is a side view of a distal end portion of the endoscopic treatment tool according to the third embodiment.

FIG. 7 is a side view of a distal end portion of a treatment instrument for an endoscope according to a fourth embodiment.

FIG. 8 is a side view of the distal end portion of the endoscopic treatment tool according to the fifth embodiment.

FIG. 9 is a side sectional view of a bendable portion of a sixth embodiment.

FIG. 10 is a side view of a distal end portion of a conventional endoscopic treatment tool in use.

[Explanation of symbols]

 2 Treatment tool insertion channel 10 Treatment tool 11 Tip treatment piece 13 Flexible shaft 14 Flexible part

Claims (1)

[Claims] 1. A treatment instrument for an endoscope having a flexible shaft which is inserted into a treatment instrument insertion channel of an endoscope so as to be capable of advancing and retracting, and has a small axial stretchability and is bendable in a certain direction. A treatment tool for an endoscope, wherein a portion is formed at a distal end portion of the flexible shaft.