JPH08332189A - Disposition means for endoscope - Google Patents

Abstract

PURPOSE: To provide a disposition means for an endoscope which has good operability and insertability and is capable of easily aiming the lesion from the front with a simple structure. CONSTITUTION: This disposition means 10 for the endoscope has a flexible shaft 13 which is freely forward and backward movably inserted into the disposition means insertion channel of the endoscope. A universally curving part 14 which is universally curvable in arbitrary directions with small expandability and contractability in an axial direction is formed at the front end of this 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-mentioned object, a treatment instrument for an endoscope of the present invention has a flexible shaft that is inserted into a treatment instrument insertion channel of an endoscope so as to be able to advance and retract. The treatment tool for an endoscope is characterized in that a bendable portion having a small elasticity in the axial direction and being bendable in an arbitrary direction is formed at a tip 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 of a so-called close-wound coil in which a thin stainless steel wire is closely wound to the same diameter over substantially the entire length, and as shown in FIG. 1, it can be bent freely in any direction. The portion 14 is the flexible shaft 13.
Is formed only at the tip of the. 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.

In the flexible shaft 13, the link mechanism 1 is provided.
A treatment piece operating wire 16 that is operated to move back and forth from the operation portion 12 side to operate 1a is inserted over the entire length so as to be able to move back and forth.

Like the so-called four-way bending mechanism of an endoscope, the bendable portion 14 is constituted by connecting stainless steel node rings 14a formed in a short tubular shape to each other so as to be rotatable. No operating wire is provided for remotely controlling the bend.

At both front and rear ends of each node ring 14a, a pair of tongue pieces project from each of the front end side and the rear end side by changing the direction by 90 °, and the tongue pieces of the adjacent node rings 14a are connected to each other. Are rotatably connected by rivets 14b. And
The treatment piece operating 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 centered on the tongue portion connected by the rivet 14b, and are separated from the end faces of the adjacent node ring 14a as going outward from there. It is formed on the slope.

Therefore, each node ring 14a can freely rotate about the rivet 14b to the extent that the slope hits the adjacent node ring 14a.
The entire 4 can be bent in any direction. However, it does not expand or contract at all in the axial direction.

When using the endoscopic treatment tool 10 of the embodiment thus constructed, first, as shown in FIG. 3, the distal end portion of the treatment tool 10 is inserted into the treatment tool 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.

When the flexible shaft 13 is further pushed out after doing so, as shown in FIG. 4, the bendable portion 14 is in a natural state with the distal treatment piece 11 pressed near the affected area A as a fulcrum. With this, the distal treatment strip 11 can be smoothly bent, the orientation of the distal treatment strip 11 can be changed, and the distal treatment strip 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 when 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.

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

In the third 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. 7 shows a fourth 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. 7, 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 mucous 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 respective embodiments, and for example, as shown in FIG. 8, a flexible tubular shape such as silicon rubber. The elastic material 14c may be formed by embedding the metal coil 14d, or, as shown in FIG. 9, may be formed by embedding the metal tubular tube 14e in the flexible tubular elastic material 14c.

[0025]

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 is bendable in an arbitrary direction. When the flexible shaft is pushed further out by protruding from the treatment tool insertion channel of the mirror and pressing against the part with the affected part, the flexible part bends smoothly in a natural state with the tip part pressed against the affected part as a fulcrum, The direction of the tip portion changes, and it is possible to contact the affected area from the front.

Therefore, it is possible to easily aim at the affected area from the front with a simple structure having good operability, 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 perspective 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 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 sectional view of a bendable portion of a 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 able to advance and retreat, and which has a small elasticity in the axial direction and is bendable in any direction. A treatment instrument for an endoscope, wherein a free portion is formed at a tip portion of the flexible shaft.