JPH0692Y2 - Grasping tool for endoscope - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is used for recovering or destroying a foreign substance in a body cavity such as a biliary calculus or a ureteral calculus, which is inserted into a forceps channel of an endoscope. More specifically, the present invention relates to a so-called basket-type gripping tool.

[Prior Art] A basket-type grasping tool for an endoscope generally includes a plurality of elastic wires formed at the tip of an operation wire inserted in a flexible tube so as to expand like a cage outside the tube. The rear end is fixed by binding and the rear end is connected to the operation wire. The tips of the elastic wires are bound and fixed to each other.

Then, in the conventional endoscope gripping tool, the distal ends and the rear ends of the plurality of elastic wires are simply inserted into a tubular body such as a connecting pipe, and fixed by bundling by soldering or silver brazing. It was

[Problems to be Solved by the Invention] An endoscopic grasping tool collects or destroys foreign matter in a body cavity by wrapping the foreign matter in the body cavity inside a plurality of cage-like inflated elastic wires. . Therefore, if the foreign matter in the body cavity cannot be easily wrapped inside the elastic wire, the recovery work will take extra time.

However, in the conventional endoscopic grasping tool, the tip and the rear end of the elastic wire are simply inserted into the tubular body and fixed by binding, so that when performing the operation for binding and fixing the elastic wire at the time of assembly. In many cases, the elastic wires are displaced or rotated, and the elastic wires have different lengths or are distorted in shape, so that the elastic wires do not have a uniform bulge. And, for that reason, there are drawbacks such that the foreign matter in the body cavity cannot be easily wrapped inside the elastic wire, or when the foreign matter is wrapped and tightened, the force is intensively applied only to a part of the wire and the wire is cut. was there.

The present invention solves such a conventional drawback, and provides an endoscopic grasping tool capable of easily binding and fixing elastic wires at the time of assembly so that the swelling of the elastic wires becomes uniform. The purpose is to do.

[Means for Solving the Problems] In order to achieve the above object, an endoscopic grasping tool of the present invention includes a flexible tube that can be inserted into and removed from a forceps channel of an endoscope, and the inside of the tube. The operation wire inserted from the base end side of the tube and the distal end of the tube so that the operation wire can be inserted into and removed from the tube, and each tip and each rear end are inserted into the tubular body. And a plurality of elastic wires connected to the operation wire at their rear ends, and the plurality of elastic wires are formed so as to expand like a cage outside the tube as a whole. In the grasping tool for a mirror, at least one of the distal end side and rear end side tubular bodies of the elastic wire is characterized in that a pin is arranged on an axial line portion of the tubular body to bind and fix the elastic wires. .

[Operation] When the operation wire is pushed forward, the elastic wire is pushed out from the tip of the tube and expands like a cage as a whole. Then, in this state, the foreign matter in the body cavity can be collected by wrapping it in the bulge. On the other hand, when the operation wire is pulled toward the base side, the elastic wire is drawn into the tube and stored in the tube.

When assembling and fixing the elastic wires when assembling the grasping tool for an endoscope of the present invention, the elastic wires are collectively pushed together with the pins into the axial portion at the front end or the rear end. It can be temporarily fixed by pushing the end part of the into the tubular body tightly. Therefore, it is possible to bind and fix the elastic wires by silver brazing, soldering, or the like after surely adjusting the position or the direction of expansion.

[Example] An example will be described with reference to the drawings.

FIG. 1 shows a grasping tool for an endoscope according to an embodiment of the present invention. Reference numeral 1 denotes a flexible tube made of, for example, tetrafluoroethylene resin, which can be inserted into and removed from a forceps channel of an endoscope. Is. The tube 1 has, for example, an outer diameter of 1.5 to 3.
It has a thickness of 5 mm and a thickness of 0.2 to 0.8 mm.

An operation wire 3 is inserted into the tube 1 so as to be movable back and forth from the base end side of the tube 1. As the operation wire 3, for example, a stranded wire of stainless steel wire is used.

A plurality of (for example, four) elastic wires 2 are arranged at the tip of the tube 1. As each elastic wire 2, for example, a stranded wire or a single wire of stainless steel wire is used. The tip ends of the elastic wires 2 are gathered together and fixed to a binding member 5 (cylindrical body), and the rear ends of the elastic wires 2 are similarly formed into a connecting pipe 6 (cylindrical body) that is sized to be inserted into the tube 1. ) Is connected to the distal end of the operation wire 3. The bundling member 5 does not necessarily have to be inserted into the tube 1, but it is not possible to make it extremely larger than the outer diameter of the tube 1.
It is not preferable because it makes the insertion operation into the body cavity difficult.

Each elastic wire 2 is formed with a plurality of bent portions so that the elastic wire 2 expands like a cage outside the tube 1 as a whole.

In this embodiment, as shown in FIG. 2, the parallel pin 10 is arranged in the axial portion of the binding member 5 in a state in which it is tightly inserted. Therefore, when the work of binding and fixing the elastic wires 2 is performed at the time of assembling the gripping tool, all the tips of the elastic wires 2 are collectively pushed together with the pin 10 into the axial portion of the binding member 5, so that the tips of the elastic wires 2 are gathered. Is tightly pushed into the binding member 5 and temporarily fixed. Then, the position of each elastic wire 2 and the direction of swelling can be adjusted to the optimum state, and the elastic wire 2 can be fixed by silver brazing or soldering 12.

Further, as shown in FIG. 3, the parallel pin 11 is similarly provided on the axial portion of the connection pipe 6 on the rear end side of the elastic wire 2.
However, they are placed in a tightly inserted state. Therefore, when the work of binding and fixing the elastic wires 2 is performed, the rear ends of all the elastic wires 2 are collectively put in the pin 1 in the same manner.
By pushing together with 1 into the axial portion of the connecting pipe 6, the rear end of each elastic wire 2 is pushed tightly into the connecting pipe 6 and temporarily fixed. Then, the position of each elastic wire 2 and the direction of the bulge can be adjusted, and the elastic wires 2 can be fixed by silver brazing, soldering 13 or the like.

The pin is not limited to the parallel pin, and a tapered pin 14 such as shown in an enlarged view in FIG. 4 may be used. In this case, the smaller diameter one is inserted into the binding member 5 or the connection pipe 6.

When using the endoscope grasping tool of the above embodiment, first, the operation wire 3 is pulled toward the base side, and the elastic wire 2 is stored in the tube 1. At this time, the bent portion of each elastic wire 2 is expanded. In this state, the grasping tool for the endoscope is inserted into the forceps channel of the endoscope.

When the tip of the tube 1 is projected from the tip of the endoscope,
By pushing out the operation wire 3, the elastic wire 2 is pushed out from the tip of the tube 1, and the elastic wire 2 expands like a cage as shown in FIG. Then, in this state, the foreign matter in the body cavity can be collected by wrapping it in the bulge. In the endoscope gripping tool of this embodiment, the bulges of the elastic wires 2 can be made uniform by adjusting the positions of the elastic wires 2 and the directions of the bulges at the time of assembly. It is easy to wrap the foreign matter in the body cavity, and a force is evenly applied to each elastic wire 2.

The grasping tool for an endoscope according to the present invention is not limited to the above-mentioned embodiments, and at least one of the distal end side and rear end side tubular bodies of the elastic wire is attached to the axial portion of these tubular bodies. It is sufficient if pins are arranged and the elastic wires are bound and fixed.

[Advantage of the Invention] According to the endoscopic grasping tool of the present invention, the elastic wire is temporarily fixed when the grasping tool is assembled by arranging the pin on the axial portion of the tubular body, and Since it is possible to bind and fix the elastic wires after adjusting the position and the direction of the bulge, it is possible to easily perform the binding and fixing work so that the bulges of the elastic wires are even. As a result, at the time of use, the foreign matter in the body cavity can be easily wrapped inside the elastic wires, and the elastic wires are evenly applied with force, so that the elastic wires are hard to be broken and excellent durability can be obtained. .

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment of a grasping tool for an endoscope of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III of FIG. A front view and FIG. 4 are enlarged side views of the taper pin. 1 ... Tube, 2 ... Elastic wire, 3 ... Operation wire, 5 ...
Bundling members, 6 ... Connection pipes, 10, 11, 14 ... Pins.

Claims (1)

[Scope of utility model registration request] 1. A flexible tube which can be inserted into and removed from a forceps channel of an endoscope, an operation wire which is inserted into the tube so as to be capable of advancing and retracting from a proximal end side thereof, and the tube. A plurality of elastic wires that are provided at the tip of the tube so that they can be taken in and out, and that each tip and each trailing end are inserted into a tubular body and are bound and fixed to each other, and that the trailing end is connected to the operation wire. In a grasping tool for an endoscope, wherein the plurality of elastic wires are formed so as to expand like a cage outside the tube as a whole, at least one of a tubular body on a front end side or a rear end side of the elastic wire. 2. A grasping tool for an endoscope, wherein a pin is arranged on the axial portion of the cylindrical body to bind and fix each elastic wire.