JPH0741019B2 - Auxiliary tool for endoscopic treatment tools - Google Patents

Description

TECHNICAL FIELD The present invention relates to an auxiliary tool for an endoscopic treatment tool that assists a treatment tool such as forceps.

[Conventional technology]

Conventionally, in a general endoscope, a forceps raising base is provided in the vicinity of the opening of the channel tip, the forceps raising base is guided by the forceps raising base, and the forceps raising base is rotated by an operation wire or the like. It is known that forceps or the like regulate the direction of extraction.

However, in this type, the forceps raising base and the related parts are incorporated in the distal end portion of the endoscope, so that the distal end portion becomes large. Further, the vicinity of the opening of the tip of the channel is complicatedly packed, and dirt and the like are easily clogged, and cleaning of this is very troublesome. Moreover, since the mechanism for pulling the operation wire is provided in the operation section of the endoscope, there is a drawback that the operation section becomes large and heavy.

Therefore, as disclosed in Japanese Patent Laid-Open No. 54-88681, there has been proposed a hood that is attached to the tip of the insertion portion and is provided with a protrusion on the inner periphery thereof so that the hood has a forceps raising function.

[Problems to be solved by the invention]

However, the one proposed in this publication can only obtain a constant rising angle, and the rising motion is extremely unstable.

On the other hand, as a prior application (Japanese Patent Application No. 59-222437), a device has been proposed in which the forceps itself has a mechanism for raising the tip portion thereof.

However, in this structure, the entire diameter including the mechanism is considerably thickened, so that it is not suitable for insertion into the channel provided in the insertion portion of the endoscope which is considerably thinned recently. .

Moreover, the tip portion of a normal forceps is larger than that of the sheath portion. Therefore, when this is inserted into a large-diameter channel, there is a drawback that the sheath part sways at the opening portion of the channel tip and plays, and the sniper ability such as biopsy is reduced.

The present invention has been made in view of these problems, and the object thereof is to make the endoscope compact and to improve the sniper ability of the endoscope. To provide.

[Means and Actions for Solving Problems]

The auxiliary tool of the treatment tool for an endoscope of the present invention includes an operation member that is inserted into an insertion channel of an endoscope and a member located outside the endoscope from a proximal end side opening portion of the insertion channel. A proximal side operation portion provided at the proximal end of the operation member, and a treatment instrument regulation member which is connected to the distal end of the operation member and can be inserted into the insertion channel, are provided in parallel with the treatment instrument. The position of the treatment instrument is regulated by inserting the operation member into the insertion channel and arranging the treatment instrument regulation member in the vicinity of the distal end opening of the insertion channel.

〔Example〕

1 and 3 show a first embodiment of the present invention.

In FIG. 2, 1 is an endoscope. The endoscope 1 is formed by connecting an insertion portion 3 to an operation portion 2, and the insertion portion 3 is formed by connecting a distal end forming portion 6 to a distal end of a flexible tube 4 via a bending tube portion 5. The bending tube portion 5 can be remotely operated to be bent by the operation knob 7 of the operation portion 2 via a pair of wires (not shown) inserted into the flexible tube portion 4.

The tip forming section 6 is provided with an illumination window 8, an observation window 9 and a channel opening 10. Then, as shown in FIG. 1, the tip of the optical fiber bundle 11 is located inside the observation window 9 and the objective lens is
It is provided through 12. The optical fiber bundle 11 is connected to the eyepiece portion 13 provided on the operation portion 2 through the insertion portion 3 and the operation portion 2.

On the other hand, the channel port 10 extends through the operation portion 2 and the insertion portion 3 and is inserted into each of the insides of the insertion channel 14.
The tip of is configured. Further, the base end of the insertion channel 14 is connected to the insertion opening 15 provided in the operation portion 2. Then, for example, forceps 16 and an auxiliary tool 17 for the forceps can be simultaneously inserted into the insertion channel 14 as a treatment tool.

The forceps 16 is composed of a distal end portion 18 and thereby a flexible sheath 19 having a small diameter. Further, the assisting tool 17 is provided with a knob 21 at the proximal end of an operating shaft 20 as a flexible operating member, and at the tip of the operating shaft 20 a raising member 22 as a treatment tool restricting member. It is provided. The raising member 22 is formed of a cylindrical member having an outer diameter that can be inserted into the insertion channel 14, and further, a slope 23 that is enlarged toward the tip is formed in a part of the outer periphery by being cut out. The outer diameter of the operating shaft 20 is smaller than the inner diameter of the insertion channel 14 minus the outer diameter of the tip portion 18 of the forceps 16.

Then, when using the auxiliary tool 17, first, the auxiliary tool 17 is inserted from the insertion opening portion 15 into the insertion channel 14, and the upright member 22 is projected from the channel opening 10. Then,
The forceps 16 is similarly inserted, and the tip portion 18 is projected from the channel opening 10. Then, the assisting tool 17 is retracted so that the slope 23 of the raising member 22 and the channel port 10 are moved as shown in FIG.
Insert the sheath 19 between it and the surrounding wall. As a result, the vicinity of the tip of the forceps 16 rises along the slope 23 thereof.

It should be noted that if the forceps 16 and the auxiliary tool 17 are integrally twisted to change the position where they are clamped, the rising direction can be changed.

FIG. 4 shows a second embodiment of the present invention. This embodiment is not a slope with respect to the raising member 22 of the auxiliary tool 17,
Instead of this, grooves 30 and 31 are formed. The grooves 30 and 31 have different inclination angles, and the rising angle can be changed by selectively using one of the grooves 30 and 31. That is,
When it is desired to change the rising angle, the rising member 22 is once projected and rotated, and the position where the sheath 19 of the forceps 16 enters the other groove 31, for example, is selected. Then, the assisting tool 17 is retracted and the sheath 19 is inserted into the groove 31 so as to be held and raised.

FIG. 5 shows a third embodiment of the present invention. In this embodiment, an insertion hole 33 different from the slope 23 is formed in the raising member 22 of the auxiliary tool 17 in the first embodiment. According to this, for example, mucus can be sucked through the insertion channel 14 and the insertion hole 33 when the forceps is raised.

FIG. 6 shows a fourth embodiment of the present invention. In this embodiment, the inner wall of the channel opening 10 is also provided with a slope 34 corresponding to the slope 23. And these slopes 23,2
The sheath 19 of the forceps 16 is sandwiched between the four.

In the present invention, the operation shaft 20 of the auxiliary tool 17 may be formed in a tubular shape in the middle thereof, and forceps may be inserted and guided in the tubular portion.

7 to 10 disclose a forceps guide different from the present invention. That is, reference numeral 40 denotes the forceps guide tool, which constitutes a chuck portion 44 in which a flexible tube 42 as an operating member through which the forceps 16 is inserted is formed with slits 43 ... As shown in FIG. To do. The chuck portion 44 is normally closed as shown in FIGS. 7 and 8, and is expanded when the forceps 16 is ejected as shown in FIGS. 9 and 10. After that, when the forceps guide 40 is pulled in, the expanded chuck portion 44 as shown in FIG.
The sheath 19 of the forceps 16 can be held by being pressed against the peripheral edge of the forceps 10.

Further, as shown in FIG. 11, if the inner periphery of the channel opening 10 is formed in a taper shape toward the observation window 9 side, the forceps 16 can be directed toward the observation window 9 side when the forceps 16 is held.

Further, FIGS. 12 and 13 show that the orthogonal points of the notches of the slits 43 of the chuck portion 44 are located eccentrically from the central axis. Further, the inner circumference of the channel opening 10 is formed so as to spread in a tapered shape. With this configuration, the forceps 16 can be directed diagonally forward when the forceps 16 are sandwiched.

〔The invention's effect〕

As described above, according to the present invention, since the raising stand and the operating mechanism thereof are not required, the diameter of the distal end portion of the endoscope insertion portion can be reduced, and the operating portion can be made light and compact. Further, it is possible to prevent the treatment tool from wobbling and improve the sniper ability.

[Brief description of drawings]

FIG. 1 is a side sectional view of a distal end portion of the endoscope showing a usage state of the first embodiment, and FIG. 2 is a perspective view of the usage state thereof, and FIG.
FIG. 4 is a sectional view of the raising member, FIG. 4 is a sectional side view of the second embodiment, FIG. 5 is a sectional side view of the third embodiment, and FIG.
FIG. 7 is a side sectional view of the endoscope tip portion showing the usage state of the fourth embodiment, FIG. 7 is a side sectional view of the endoscope tip portion showing the use state of the forceps guide, and FIG. 8 is the forceps. FIG. 9 is a front view of the chuck portion of the guide tool, and FIG. 9 is a side sectional view of the endoscope distal end portion thereof,
FIG. 10 is a front view of the chuck portion of the forceps guide tool,
FIG. 11 and FIG. 12 are side sectional views of the distal end portion of the endoscope showing the other things, and FIG. 13 is a front view of the chuck portion of the same one as FIG. 1 ... Endoscope, 10 ... Channel mouth, 14 ... Insertion channel, 16 ... Forceps, 17 ... Auxiliary tool, 20 ... Operation axis,
22 …… Raising member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyuki Takara 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Hideo Ito 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Yukio Nakajima 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Tatsuya Yamaguchi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. An operating member that is inserted into an insertion channel of an endoscope, and is provided outside the endoscope from a proximal end side opening of the insertion channel and is provided at a proximal end of the operation member. And a treatment tool regulating member which is connected to the distal end of the operation member and can be inserted into the insertion channel, and the operation member is inserted into the insertion channel in parallel with the treatment instrument. An auxiliary tool for an endoscopic treatment tool characterized in that the position of the treatment tool is regulated by locating the treatment tool regulating member in the vicinity of the distal end opening of the insertion channel.