JPS63317149A - Basket-shaped grasping forceps - Google Patents

Abstract

PURPOSE:To widely open a basket at the part near the leading end thereof, by inserting an elastic wire between the strands of at least one elastic wire among a plurality of elastic wires each formed by twisting a plurality of strands to form a basket-shaped grasping part. CONSTITUTION:An elastic wire 20b is inserted between the strands of at least one elastic wire 20a among a plurality of elastic wires 20a, 20b each formed by twisting a plurality of strands 19 to form a basket-shaped grasping part 18. As a result, a hard part becomes short and the basket can be widely opened at the part near the leading end thereof. By this method, a basket-shaped grasping forceps widely openable in a narrow internal organ and having high foreign matter collecting capacity is obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a basket-shaped grasping section composed of a plurality of elastic wires, and is a basket-shaped grasping section for extracting a foreign object such as a stone from a body cavity to the outside of the body cavity. Regarding forceps.

[Conventional technology]

A conventional technique is disclosed in, for example, Japanese Patent Laid-Open No. 58-29456. As shown in FIG. 8, the basket-shaped gripping part (hereinafter referred to as basket part) l of the basket-type gripping forceps is composed of a plurality of elastic wires 2,
It is bent in multiple places so that it expands into a basket shape. The tips of the plurality of elastic wires 2 are short cylindrical tips 3.
It is inserted inside and fixed by brazing.

Furthermore, in order to reliably prevent the chip 3 from coming off, the brazing wire 4 is applied so that it seeps out to the elastic wire 2 at the rear end of the chip 3.
is being carried out. Although not shown, the rear ends of the plurality of elastic wires 2 are connected to an operation wire that is slidable forward and backward by an operation section. Further, the plurality of elastic wires 2 and the operating wires are inserted into a mantle tube (not shown) fixed to the operating section.

With this configuration, the basket-type grasping forceps are inserted into the forceps channel of the endoscope, and the tip of the mantle tube is positioned on a foreign object such as a stone. Then, the operation wire is slid forward by the operation section to cause the basket section 1 to protrude. and,
A calculus is placed in the basket l, grasped, and removed from the body.

[Problem that the invention seeks to solve]

By the way, in the basket portion 1 of the conventional basket-type grasping forceps described above, a plurality of elastic wires 2 are inserted into the tip 3 and fixed by brazing.
In addition to the length 11, a hard part 1t is generated due to seepage of the wax, so a certain amount of protruding part is generated.As a result, the basket part 1 becomes small, and it is difficult to take the stone into the basket part l. The size of the stone that can be grasped is limited, and the basket portion l may not be able to fit into a narrow organ due to the protruding portion.

This invention was made by focusing on such problems, and by shortening the hard part at the tip of the basket part,
The purpose of the present invention is to provide basket-type grasping forceps that can widen even narrow organs and have a high ability to collect foreign bodies.

[Means for solving problems]

Among the plurality of elastic wires twisted with a plurality of strands, another elastic wire was inserted between the strands of at least one elastic wire to form a Baskent-shaped gripping part.

[For production]

Since another elastic wire is inserted between the strands of at least one elastic wire, the hard part becomes shorter and the basket can be opened more widely than the tip.

〔Example〕

1 to 3 are diagrams showing a first embodiment.

As shown in FIGS. 1 and 2, the basket-type grasping forceps 11 includes a mantle tube 14 made of a flexible tube that can be inserted into the forceps channel 13 of an endoscope 12;
An operating section 15 fixed to the rear end, an operating wire 17 inserted into the outer tube 14 so as to be freely retractable and connected to a slider 16 of the operating section 15, and a basket attached to the tip of the operating wire 17. It is composed of a section 18. This basket portion 18 is housed in the mantle tube 14 when the slider 16 of the operating portion 15 is pulled toward the user's hand.

The basket portion 18 is formed by folding back two elastic wires 20 formed by twisting a plurality of wires 19, and bending each midway portion at a plurality of locations so as to bulge into a basket shape. As shown in FIG. 3, in the folded portion 21, the strands 19 of one elastic wire 20a are untwisted to form a gap 22 between the strands 19, and the other elastic wire 20b is inserted into this gap 22. There is. The end of the folded elastic wire 20 is inserted into a large diameter hole 23a of a connecting chip 23 having a stepped hole and fixed by brazing.

The end of the operating wire 17 is inserted into the small diameter hole 23b of the connection chip 23 and fixed by brazing.

Next, based on the above configuration, the operation of removing the stone 25 from within the gallbladder 24 will be explained.

As shown in FIG. 2, the endoscope 1112 is inserted into the body cavity and the distal end of the endoscope 12 is positioned near the stone 25 of the gallbladder 24. Then, the slider 16 of the basket-type grasping forceps 11 is pulled toward the proximal side, and the basket portion 18 is inserted into the mantle tube 1.
4, the mantle tube 14 is inserted into the forceps channel 13 of the endoscope 12. When the mantle tube 14 protrudes from the distal end of the endoscope 12, the slider 16 is pushed forward, the basket portion 18 is made to protrude from the mantle tube 14, and the elastic wire 20a is inserted.

20b is expanded into a basket shape. Basket part 18
Since the folded portion 21 has no hard part, the basket portion 18 expands more than the tip inside the gallbladder. and,
The stone is taken into the basket part 18, the slider 16 is pulled toward the hand side, the shape of the basket part 18 is reduced, the stone is securely held, and the stone is extracted out of the body cavity.

As an effect of the first embodiment, the other elastic wire 20b is inserted into the gap 22 between the strands 19 of one elastic wire 20a and folded back to form the basket portion 18.
Since there is no hard part in the folded part 21, the basket can be expanded further than the tip, so that even large stones in organs with narrow spaces can be taken in easily. Further, since there is no need to provide a tip at the tip of the basket portion 18, the structure is simple and can be manufactured at low cost.

4 to 7 are diagrams showing other embodiments in which the shape of the basket portion is different from that of the first embodiment, and parts having the same configuration are given the same reference numerals, and details are omitted.

4 and 5 show a basket portion 18 according to a second embodiment.
It is. In the folded portion 21 of the basket portion 18, the strands 19 of one elastic wire 20a are untwisted to form a gap 22 between the strands 19, and the other elastic wire 20b is inserted into the gap 22.

Then, solder 27 is applied to this folded portion 21.

With the above configuration, the elastic wires 20a and 20b do not move relative to each other even when the basket portion 18 is expanded or contracted.

As an effect of the second embodiment, each elastic wire 20a.

Since the parts 20b do not move relative to each other, the basket part 18
Since it spreads uniformly without being biased, foreign matter can be easily taken in. In addition, solder 2 is applied only to the folded part 21.
7, so the size of the basket does not become small.

FIGS. 6 and 7 show a basket portion 18 according to a third embodiment.
This is the folded part 21 of. In the folded portion 21, the strands 19 of one elastic wire 20a are untwisted to form a gap 22 between the strands 19, and the other elastic wire 20b is inserted into this gap 22.

Then, as shown in FIG. 7, the other elastic wire 20b
Untwist both sides of the wire 19 inserted into the bulge part 2.
8 is formed.

With the above configuration, the elastic wires 20a and 20b do not move relative to each other even when the basket portion 18 is expanded or contracted.

Incidentally, in the folded portion, the strands of the 100 elastic wire may be untwisted to form a gap between the strands, and a plurality of elastic wires may be passed through this gap.

Also, by forming multiple gaps in one elastic wire,
A gap may be formed between a plurality of elastic wires, and other elastic wires may be passed through the gap.

By forming the basket portion with a plurality of elastic wires in this manner, it is possible to prevent foreign matter from dissolving from the basket portion.

〔Effect of the invention〕

As described above, according to the present invention, among a plurality of elastic wires twisted with a plurality of strands, another elastic wire is inserted between the strands of at least one elastic wire, and the other elastic wire is held in a basket shape. Since the hard part at the tip of the basket is shortened, the basket can be opened wider than the tip.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the tip of the basket-type grasping forceps showing the first embodiment, Fig. 2 is a diagram of the usage state of the same embodiment, Fig. 3 is a diagram of the folded part of the basket part of the same embodiment, and Fig. 4 The figure is the second
Figure 5 of the tip of the basket-type grasping forceps showing the embodiment.
The figure is a diagram of the folded part of the basket part of the same embodiment, No. 6
7 is a view of the folded portion of the basket portion showing the third embodiment; FIG. 7 is a view taken in the direction of arrow A in FIG. 6; and FIG. 18...-Basket part (gripping part), 19... Element wire 19.20a, 20b...-Elastic wire, 2
1---Folded part.

Claims (1)

[Claims] A basket type characterized in that a basket-shaped gripping portion is formed by inserting another elastic wire between the strands of at least one of the plurality of elastic wires twisted with a plurality of strands. Grasping forceps.