JPS6219156A - Grasping forcept for endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscope grasping forceps used transendoscopically.

[Conventional technology]

Introduce the endoscope into the body cavity through the insertion channel,
Grasping forceps for an endoscope are known for grasping and removing stones from the body (Japanese Utility Model Publication No. 54-63992).

This grasping forceps has a plurality of separated grasping pieces exposed at the tip of the sheath, and a claw-like part is formed at the tip of each grasping piece to prevent the stone from coming off when grasping the stone. .

[Problem that the invention seeks to solve]

However, in recent years, with the expansion of the applicable range of endoscopes, the diameter of the endoscope insertion portion has been reduced in order to reduce insertion into narrow lumens and discomfort to patients.

Along with this, it has become necessary to reduce the diameter of the above-mentioned grasping forceps for endoscopes.

By the way, when a stone or the like is grasped at the tip of the grasping piece of the above-mentioned grasping forceps, the grasping piece including the concise claw-like part cannot be completely accommodated in the mantle tube. If the sharp tip of the gripping piece that is not fully stored and is exposed from the mantle can scrape the inner surface of the endoscope's insertion channel, the insertion channel may be ruptured, resulting in serious accidents such as water leakage. It is also possible that they are connected. In addition, it is easy to get caught on the inner surface of the insertion channel, which hinders smooth insertion. Furthermore, when inserted into a narrow body cavity, there was a risk of damaging the mucous membrane.

The present invention has been made in view of the above problems, and provides a grasping forceps for an endoscope that can prevent damage to the inner surface of the insertion channel of the endoscope, ensure smooth insertion, and can be used more safely. There is a particular thing.

[Means for solving problems]

The plurality of gripping pieces protruding and retractably provided at the tip of the mantle tube are configured so that when the gripping pieces are retracted and closed, the tips of the gripping pieces form a smooth surface.

[For production]

When the gripping piece is closed, its tip forms a smooth surface. When it is inserted into the insertion channel of the endoscope in this state, it will not get caught and will not damage the inner surface of the insertion channel.

〔Example〕

1 to 4 show a first embodiment of the present invention.

The grasping forceps 1 of this embodiment consists of an operating section 2 and a mantle tube 3. The mantle tube 3 is composed of a tightly wound coil 4, and the proximal end of this coil 4 is fixed to the main body 5 of the operating section 20 via a snapping coil 6. An operating wire 7 is inserted through the inside of the mantle tube 3 so as to be freely movable forward and backward. The base end of the operating wire 7 is connected to an operating body 8 provided on the main body 5 of the operating section 2 so as to be movable back and forth.
When the operating body 8 is moved back and forth, the operating wire 7 is moved forward and backward.

On the other hand, a tip f9 is attached and fixed to the tip of the mantle tube 3. The distal end outer surface 10 of this distal tip 9 is formed into a spherical shape. Furthermore, the tip tip f9 has a gripping portion 11.
Guide holes 13 and 13 are formed through which the plurality of gripping pieces 12, 12 forming the structure are inserted. The guide holes 13.degree. 13 are formed diagonally in opposite directions so as to be separated from each other on the front side. When the gripping piece 12.12 guided by this is pushed forward, it opens as shown in FIGS. 1 and 2, and when it is retracted, it closes and ends as shown in FIGS. It is designed to be drawn into the chip 9. Further, the proximal end of each gripping piece 12.12 is connected to the tip of the operating wire 7 through a connecting tube 14. By moving this operation wire 7 forward and backward, the gripping pieces 12, 12 can be opened and closed by moving them back and forth.

Furthermore, a claw-like portion 15.15 is bent at the tip of each gripping piece 12.12 and faces inward when opening and closing. Furthermore, a housing groove 16 is provided on the outer surface 10 of the tip f9, which is formed to correspond to the claw-like portions 11j and I5. In this storage groove 16, each gripping piece 12 is pulled in and closed as shown in FIGS. 3 and 4.
Twelve claw-shaped portions xsexs are each housed therein. For this reason, each gripping piece 12, 1 that is retreated and closed
The tip of tip 2 forms a smooth surface along the outer tip outer surface 1o of tip 9.

Next, a method of using the above-mentioned grasping forceps 1 will be explained.

It must be introduced endoscopically. For this reason, an operation to close the grip portion 11 is first performed. Retract the operating body 8 of the operating section 2 and attach each gripping piece 1 via the operating wire 2.
2. Pull in 12.

Accordingly, each gripping piece 12.12 has a respective guide hole 1.
3.13 into the mantle tube 3. and,
The claw-like portions rs and is of the gripping piece 12.12 are stored in the storage groove I6 and are no longer able to be pulled in any further, and as shown in FIG. M3 and FIG. It will be in a state along the surface 10. These form a smooth outer surface that is approximately spherical.

Therefore, the grasping forceps 1 in this state is guided into the body cavity through the insertion channel of an endoscope (not shown in FIG. 6). At this time, since the tip of the grasping forceps 1 has a smooth outer surface, it can be inserted through the insertion channel without cutting or tearing the inner surface of the insertion channel. Furthermore, since it can be inserted smoothly without getting caught on the inner surface of the insertion channel, there is no problem with the insertion.

After confirming the grasping forceps 1 introduced into the body cavity under observation with an endoscope, the grasping portion 11 is opened. That is, by advancing the operating body 8 in the operating section 2, each gripping piece 12, 12 is pushed out via the operating wire 7. As a result, each gripping piece 12.12 projects through its respective guide hole 13.13 as shown in FIGS. 1 and 2, and expands in the radial direction due to its own elastic force to grip the foreign object. be able to do it. Therefore, after the foreign object is taken into the gripping pieces 12, 12 under observation with an endoscope, the operating body 8 of the operating section 2 is moved back and the gripping pieces 12, 12 are retracted via the operating wire 7. For this, gripping piece 1
The interval between the claw-like parts 15 of 2 and 12 becomes narrower, and the foreign object is bitten and grasped.

5 to 8 show a second embodiment of the present invention. In this embodiment, the distal tip 9 is formed into a cylindrical shape, and the corner of the end R20 on the distal end side is formed into a smooth cross-sectional shape. Further, the tips of the gripping pieces 12, 12 are provided with claw-like portions 15, 15 formed in a spherical shape, and the surfaces on the tip side thereof are smooth spherical surfaces. Each of the gripping pieces 12, 12 has an elastic force of its own in the direction of expansion.

When opening the gripping portion 11 of the gripping forceps 1 of this embodiment, K is pushed out from the distal tip 9 as shown in FIGS. yo) let me hear it.

Furthermore, when closing the gripping portion 11, the operating wire 7 is pulled to draw the gripping pieces 12, 12 into the mantle tube 3. As a result, each gripping piece 12.12 closes as shown in FIGS. 7 and 8, and the claw-shaped parts Z5#, 1B have tip tips
hit the tip of.

The claws 15.15 then form a hemispherical smooth outer surface.

In addition, when configuring such a grip part 11, there are three grips as shown in FIG. 9, or four grips as shown in FIG.
It can also be used as a book.

11 to 13 show a third embodiment of the present invention. This embodiment is based on the gripping piece 1 of the second embodiment.
2.12 is formed into a triangular cross section as shown in FIG. Furthermore, the gripping piece 1 is attached to the inner circumference of the distal end side of the distal tip 9.
Guide grooves 2B and 2B each having a triangular cross section are formed into which the guide grooves 2 and 12 are fitted to guide and regulate the guide grooves. According to this embodiment, when opening and closing the grip part 11, the grip piece z
2.12 is guided by the guide groove 25° 25, and the grip portion 11 is prevented from rotating. Therefore, gripping piece 1
2. The opening direction of 12 is fixed and opens equally.

Note that the gripping pieces 72, 12 and the guide grooves 26, 25
The cross-sectional shape may not be triangular but may be rectangular or the like.

15 to 17 show a fourth embodiment of the present invention. In this embodiment, the cross-sectional shape of the gripping pieces 12.12 is triangular as shown in FIG. Furthermore, the distal tip 9 is provided with guide holes 13° 13 as in the first embodiment, but the guide holes Z, ? The cross-sectional shape of 113 is triangular to match the gripping pieces 12, 12. In this way, each gripping piece 12.12 advances and retreats within its guide hole 13.13 without rotating.

Therefore, the claw-like portions 15.degree. 15 are correctly accommodated in the storage grooves 16. In this embodiment as well, the cross-sectional shapes of the gripping pieces 12, 12 and the guide holes 13e 13 may be rectangular instead of triangular.

〔Effect of the invention〕

As explained above, in the gripping forceps of the present invention, when the gripping piece of the gripping portion is closed, the tip of the gripping portion has a smooth surface shape. Therefore, when it is inserted into the insertion channel of the endoscope in this state, it can be inserted smoothly without getting caught, and the inner surface of the insertion channel will not be damaged. Furthermore, when the device is inserted into a narrow site within a body cavity with the grip portion closed, there is no risk of damaging the mucous membrane surface, and the device can be inserted with confidence.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a grasping forceps according to a first embodiment of the present invention;
FIG. 2 is a front view of the tip, FIG. 3 is a side sectional view of the tip of the grasping forceps with the grip closed, FIG. 4 is a front view of the tip with the grip closed, and FIG. The figure is a side sectional view of the tip of the second embodiment of the present invention with the grip portion open, FIG. 6 is a front view of the tip, and FIG. 7 is a front view of the tip with the grip portion closed. 8 is a front view of the tip, FIGS. 9 and 10 are front views of the tip showing a modification of the second embodiment, and FIG. 11 is a front view of the tip of the third embodiment of the present invention. FIG. 12 is a sectional view taken along line A-A in FIG. 11, and FIG. 13 is a front view of the tip with the grip portion opened. , FIG. 14 is a side sectional view of the tip of the fourth embodiment of the present invention with the grip portion closed, FIG. 15 is a side sectional view of the tip of the fourth embodiment of the present invention with the grip portion opened, and FIG. FIG. 15 is a sectional view taken along the line A-A, and FIG. 17 is a front view of the tip thereof. DESCRIPTION OF SYMBOLS 1... Grasping forceps, 3... Mantle tube, 7... Operation wire, 10... Tip outer surface, 11... Grasping part, 12...
... Gripping piece, 15... Claw-shaped portion, 16... Storage groove, 2
0...Edge. Applicant's agent Patent attorney Jun Tsuboi 12-X4 Figure 16 Figure 17 Procedural amendment nn, Group IiI 0. IQ, -8゜Michibe Uga, Commissioner of the Japan Patent Office1, Indication of the case, Patent Application No. 158779/1982, Name of the invention, Grasping forceps for endoscopes 3, Person making the amendment, Name of the applicant for this related patent ( 037) Olympus Optical Industry Co., Ltd. 4, Agent 5, Voluntary correction 7, Contents of correction (1) Delete 1 from “Karata” in the 18th line of page 2 to J
Correct to. (2) Correct "Torn shi" in the 19th line of the second page to "Torn shi".

Claims (1)

[Claims] In endoscope grasping forceps, a plurality of protruding and retractable branching gripping pieces are provided at the tip of a mantle tube, and the gripping pieces are advanced and retracted using an operating wire inserted into the mantle tube, in which each of the gripping pieces is retracted. 1. A grasping forceps for an endoscope, characterized in that the tip of each grasping piece forms a smooth surface when the forceps are closed.