JPS6214811Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an endoscopic basket forceps for retrieving a foreign body in a body cavity, such as a biliary tract stone or a ureteral stone, through an endoscopic method.

[Conventional technology]

Japanese Utility Model Application Publication No. 166012/1983 can be mentioned as a common type of basket forceps for endoscopes. In this method, an operating wire is passed through a protective tube and a wire basket section is connected to the tip of the operating wire, and the operating wire and the wire basket section are connected via a connecting tube. For this reason, foreign matter may be drawn into the wire basket and
If the wire basket was strongly pulled in and held, there was a risk that the connecting portion would come off and the wire basket portion would fall into the body cavity.

Therefore, as a solution to this problem, there is a method disclosed in Japanese Utility Model Publication No. 14060/1983. In some cases, a wire basket portion is formed by unraveling a portion of a stranded operating wire, and the operating wire and wire basket portion are integrally formed.

However, since the stranded wires that can be used are naturally limited, it is difficult to obtain a wire that has sufficient characteristics as a wire basket portion and as an operating wire. In addition, a part of the wire basket part had to be unraveled, and the shape of the wire basket part had to be formed with the operating wire still attached, resulting in extremely poor workability.

[Purpose of invention]

This invention was made with attention to the above circumstances,
The purpose is to provide a safe basket forceps for an endoscope whose basket is easy to manufacture and whose basket does not fall off from the operating wire.

[Summary of the idea]

The present invention consists of a plurality of elastic wires, and at least a part of the elastic wire of the basket connected to the tip of the operating wire is extended, and this extended portion is fixedly attached to the above-mentioned operating wire, so that even if the connecting portion becomes detached, This is a basket forceps for an endoscope whose basket does not completely come off from the operating wire.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 shows a guide tube made of a flexible tube that can be inserted into an insertion channel of an endoscope (not shown). A liquid feeding port metal tube 2 is connected to the base end of the guide tube 1, and an operating section 3 is further connected via the liquid feeding port metal tube 2. The operating section 3 consists of a slider 4 and a main body 5 that guides the slider, and the slider 4 can be moved and operated with a finger. Further, a liquid inlet 6 communicating with the flexible tube 1 is formed in the liquid feeding port brass tube 2 .

Furthermore, as shown in FIG. 2, a flexible operating wire 7 is inserted through the inside of the guide tube 1 so as to be freely advanced and retracted. The base end of the operating wire 7 is connected to the slider 4 of the operating section 3. Therefore, by moving the slider 4 back and forth as described above, the operating wire 7 can be moved back and forth.

Further, a basket 9 for grasping foreign objects is connected to the tip of the operating wire 7 via a connecting tube 8.
As shown in FIG. 2, this basket 9 is composed of a plurality of elastic wires 10 made of, for example, metal wires. That is, each elastic wire 1
0... are tied together by a metal chip 11, while their rear ends and the tip of the operating wire 7 are connected and fixed through a connecting tube 8 by brazing or the like.

Further, at least one of the plurality of elastic wires 10 constituting the basket 9 has its rear end extended, and this extension 12 extends along the side surface of the operating wire 7 at the proximal portion. Extend close. The extending tip of the extending portion 12 is bound to the operating wire 7 by a fixed tube 13 and fixed by brazing or the like.

Therefore, when using this basket forceps for an endoscope, the basket 9 is first inserted into the insertion channel of the endoscope inserted into the body cavity, and the basket 9 is retracted and stored in the guide tube 1, and then the guide tube 1 is inserted into the guide tube 1. The tube 1 is inserted, and the tip of the guide tube 1 is made to protrude into the body cavity and brought close to the foreign object 14 to be removed. Here, by pushing the slider 4 of the operating section 3 toward the distal end side, the basket 9 is projected from the distal end of the guide tube 1 via the operating wire 7. As a result, the basket 9 opens into a basket shape due to its own elastic restoring force, and the foreign object 1
4 into the interior through the gap between the elastic wires 10. Then, when the foreign object 14 is securely entered, pull the slider 4 of the operating section 3 backwards to draw the basket 9 to the mouth of the guide tube 1, and further pull the slider 4 strongly to contract the basket 9 and remove the Foreign matter 14 as shown in Figure 1
securely hold. In this state, the endoscope is pulled out of the body cavity and the foreign object 14 is removed.

By the way, if the foreign object 14 is held too securely,
I pulled slider 4 too hard backwards,
The connecting portion between the operating wire 7 and the basket 9 may come off. Recently, there has been an increasing number of surgical procedures in which the stone is firmly grasped with the basket 9 and crushed, and this is particularly likely to occur in such cases.

However, even in this case, the elastic wire 10...
Since the extension part 12 is attached to the operating wire 10, it is possible to avoid the situation where the basket 9 completely falls off from the operating wire 10 and remains in the body cavity.

Note that when removing bile duct stones, etc., insert the tip of the guide tube 1 into the bile duct, and
A contrast agent is injected with a syringe or the like through the liquid injection port 6 on the side, and the inside of the bile duct is contrasted with X-rays to confirm the location of the stone while grasping the junction.

In the above embodiment, only the extending tip of the extension part 12 of the elastic wire 10 was fixed to the operating wire 7, but as shown in FIG. It may also be fixed. In this way, safety is enhanced, and the slack between the extension portion 12 and the operating wire 7 can be reduced, and forward and backward operations become smooth.

Also, without extending the extension part 12 to the hand part, the fourth
It may be fixed near the basket 9 as shown in the figure. In this way, since the extension part is short, the operation wire 7 can be moved forward and backward smoothly, making it easy to operate, and the gap inside the guide tube 1 can be widened, so that the amount of liquid such as a contrast medium can be delivered easily.

[Effect of idea]

As explained above, in the present invention, at least one of the elastic wires constituting the basket is extended, and this extended portion is attached and fixed to the operating wire, so that even if the connection between the basket and the operating wire is separated, the It is safe because the basket does not completely fall off from the operating wire. Further, since a part of the elastic wire is extended and attached and fixed to the operating wire, the structure is simple and manufacturing is easy.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the whole of one embodiment of the present invention, Fig. 2 is a side sectional view of the main part thereof, and Figs. 3 and 4 are side sectional views of the main part of other different embodiments. It is a diagram. 1... Guide tube, 7... Operation wire, 9
... Basket, 10 ... Elastic wire, 12 ...
extension.

Claims (1)

[Scope of utility model registration request] a guide tube, an operating wire that is inserted into the guide tube so as to be freely advanced and retractable and can be operated forward and backward at the proximal end side of the guide tube; and a basket for grasping a foreign object, which is made of a plurality of elastic wires, and has one end of at least one of the elastic wires extending, and this extending portion being attached and fixed to the operating wire. Basket forceps for endoscopy.