JP4530476B2 - Foreign material recovery tool - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foreign matter collecting tool that is introduced into a body or a lumen, for example, endoscopically to collect and remove foreign matter.
[0002]
[Prior art]
For example, as a conventional foreign matter collecting tool for collecting and removing foreign matter in the body, several wires curved in an arc shape along the axial direction are provided at equal intervals in the circumferential direction, and the tips of the wires are joined to a fixing member. There are known basket-like forceps and the like.
[0003]
However, in the basket forceps, each wire is provided at an interval that allows foreign matter to pass through. Therefore, when the foreign matter is tightened by the wire, the foreign matter easily escapes from the gap between the wires, and the recovery operation is performed reliably and efficiently. It was difficult. For this reason, various foreign object recovery tools have been proposed for the purpose of reliably and efficiently performing the foreign object recovery operation.
[0004]
For example, Japanese Examined Patent Publication No. 44-20599 discloses a foreign material collecting tool including a tubular member, a gripping portion made of an umbrella-like member provided at the tip of the tubular member, and a device for opening and closing the umbrella-like member. It is disclosed. In this configuration, after the umbrella-shaped member is closed and inserted into the passage of the human body and passed through the position of the foreign material to be collected and removed, the umbrella-shaped member is opened and pulled back by a desired length to remove the foreign material. When scooping with the umbrella-shaped member, the foreign matter is gripped by the gripping portion. When the umbrella-like member is closed in the gripped state, the foreign matter is held in the umbrella-like member. Therefore, if the entire collecting tool is removed from the body together with the foreign matter, the foreign matter is collected outside the body.
[0005]
Japanese Patent Publication No. 4-47574 discloses a foreign material collecting tool having a bulbous basket. In this case, the basket is formed by a plurality of spring strips and has a bulb shape in the expanded state. Each spring strip is abutted and joined at the tip of the basket.
[0006]
[Problems to be solved by the invention]
By the way, the foreign material recovery tool disclosed in the above Japanese Patent Publication No. 44-20599 is such that when the umbrella-shaped member is opened to collect the foreign material, the umbrella-shaped member spreads so as to cover the entire front surface of the gripping portion. There is a problem that the umbrella-shaped member becomes an obstacle when collecting the foreign matter, and it is difficult for the foreign matter (stone) to enter the grip portion, and it is difficult to advance the grip portion behind the foreign matter (stone).
[0007]
On the other hand, in the foreign material recovery tool disclosed in Japanese Patent Publication No. 4-47574, the spring strips are provided at intervals of 90 degrees in the circumferential direction around the longitudinal axis of the recovery tool, so the distance between the strips is too wide. There is a problem that it is difficult to grip small stones.
[0008]
The present invention has been made paying attention to the above circumstances, and an object of the present invention is to provide a foreign matter collecting tool that can reliably and easily grip foreign matters such as stones.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the present invention includes a tubular member, a grip portion for openably provided foreign matter recovered in the distal end of the tubular member is connected to the proximal end side of the grip portion and the grip part comprising a device for opening and closing the at foreign-matter collecting device for collecting and holding the foreign matter to the inside of the grip portion by opening and closing the gripping portion, said gripping portion, at least forms a loop 2 The film body is composed of a frame part formed by a wire member, and the film body is provided only on one side of the gripping part so as to connect at least a part of the wire members on the front surface of the frame part by the film body. And an opening is provided on the other side of the grip portion .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
1 and 2 show a first embodiment of the present invention. As shown in the figure, the foreign material recovery tool according to the present embodiment has a long tubular member 1 having flexibility. The tubular member 1 is made of, for example, a synthetic resin, and has a handle attachment portion 2 at an end portion on the hand side. A flexible operation wire 3 is inserted into the inner hole of the tubular member 1 so as to be able to advance and retreat.
[0012]
A handle 4 is provided at the proximal end of the operation wire 3. Further, a sliding member 5 is connected to the distal end portion of the operation wire 3, and a gripping portion 6 is connected to the distal end of the sliding member 5.
[0013]
The gripping part 6 includes a frame part 7 and a film body 8. The frame portion 7 is formed by at least two (two in the present embodiment) spring wires 9 and 9 having a loop shape. In this case, the spring wires 9, 9 are arranged so that a plane formed by the loop of one spring wire and a plane formed by the loop of the other spring wire are substantially perpendicular to each other. . Specifically, as clearly shown in FIG. 2, the two spring wires 9, 9 intersect at approximately 90 degrees at the distal end portion 10 of the gripping portion 6, and all of the end portions thereof are converged. In this state, the frame member 7 is connected to the sliding member 5, whereby the front end side of the frame portion 7 is formed in a substantially circular shape.
[0014]
Further, when the sliding member 5 is pulled back to the proximal side as shown in FIG. 1, the spring wires 9, 9 are contracted and deformed so that approximately half of the proximal side is drawn into the tubular member 1. 2, when the sliding member 5 is pushed out toward the distal end side and substantially completely protrudes from the tubular member 1 (the pressing force from the inner surface of the tubular member 1 is released) as shown in FIG. In a free state), a spreading habit (curving habit) is imparted so as to form a substantially elliptical shape that is long in the longitudinal axis direction.
[0015]
On the other hand, the film body 8 is formed of an appropriate flexible material, for example, a moldable elastic synthetic resin material, and is provided so as to cover a substantially half circumference of the front half portion of the frame portion 7 in the longitudinal axis direction ( (See FIG. 2). Therefore, when the spring wires 9 and 9 are expanded as shown in FIG. 2, the membrane body 8 expands in a shape that divides the cloth of the umbrella in half and inserts foreign matter. An opening 11 is formed on the opposite side. That is, the gripping portion 6 is formed by an umbrella-shaped member including wires 9 and 9 forming an umbrella framework (frame) and a film body 8 forming an umbrella fabric, and is formed on at least a part of the front surface of the umbrella-shaped member. The configuration has an opening 11.
[0016]
The film body 8 is fixed around the spring wire 9 by a method such as adhesion. Further, if the film body 8 is formed of a non-extensible transparent material such as polyethylene, the field of view of the living body lumen is not blocked by the film body 8.
[0017]
Next, the operation of the foreign matter collecting tool having the above-described configuration will be described.
[0018]
In the case of collecting, for example, a foreign substance in the body using the foreign substance collecting tool having the above-described configuration, first, the handle 4 provided on the proximal side of the tubular member 1 is pulled, and the operation wire 3 is retracted toward the proximal side in the tubular member 1. As a result, as shown in FIG. 1, approximately half of the proximal side of the spring wires 9, 9 are drawn into the tubular member 1 through the sliding member 5, and the umbrella-like member forming the grip portion 6 is closed.
[0019]
In the state shown in FIG. 1, the foreign material collecting tool is inserted from the distal end portion 10 into the human body passage through the channel of the endoscope, and the opening portion 11 is opposed to the foreign material to be collected and removed. Subsequently, when the handle 4 is pushed forward and the operation wire 3 is advanced in the tubular member 1, the spring wires 9, 9 protrude substantially completely from the tubular member 1 through the sliding member 5 as shown in FIG. 2. Then, the spring wires 9 and 9 are expanded so as to form a substantially elliptical shape that is long in the longitudinal axis direction (to the extent that the human body's duct can be opened), and the film body 8 is also expanded accordingly (see FIG. 2). . Then, in this state, after collecting the foreign matter in the umbrella-shaped member through the opening 11 that is wide open, when the handle 4 of the operation wire 3 is pulled again to close the umbrella-shaped member as shown in FIG. It is hold | maintained so that a foreign material may be enclosed by the umbrella-shaped member. Therefore, if the entire collection tool is removed from the body together with the foreign matter, the foreign matter is collected outside the body.
[0020]
As described above, in the foreign material collecting tool of the present embodiment, the gripping portion 6 is an umbrella-shaped member that includes the wires 9 and 9 that form an umbrella framework (frame) and the film body 8 that forms an umbrella fabric. The opening 11 is formed on at least a part of the front surface of the umbrella-shaped member. Accordingly, the foreign matter can be easily introduced into the gripping portion 6 from the opening 11 even in a narrow living body lumen, and the collected foreign matter is held by the film body 8 to reliably prevent the foreign matter from dropping from the gripping portion 6. be able to. That is, the foreign material recovery tool of this embodiment organically couples the advantages of the conventional basket forceps and the advantages of the conventional foreign material recovery tool having an umbrella-like member, so that these disadvantages are canceled out from each other. It can be said that it is composed. In other words, the provision of the opening 11 facilitates the collection of foreign matter into the gripping portion 6 and inevitably the film body 8 does not spread so as to cover the entire front surface of the gripping portion 6. The film body 8 does not get in the way when collecting the foreign material, and the foreign material collected by the film body 8 can be held, so that the foreign material does not fall out from the gap between the wires 9 and 9.
[0021]
Moreover, in the foreign material collection | recovery tool of this embodiment, since each spring wire 9 and 9 which forms the frame part 7 are connected by the film body 8 which consists of an elastic synthetic resin material, the holding part 6 tends to become a stable shape. .
[0022]
3 and 4 show a second embodiment of the present invention. In addition, since this embodiment is a modification of 1st Embodiment, below, about the component which is common in 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
[0023]
As clearly shown in FIG. 4, in the foreign material collecting tool according to the present embodiment, each spring wire 9, 9 that forms the frame portion 7 has a plane formed by a loop of one spring wire and the other. The flat surface formed by the loop of the spring wire is arranged so as to be substantially parallel to each other at the distal end portion 10. Further, the film body 8 is provided only on one side of the gripping portion 6 so as to connect the two spring wires 9, 9, whereby the opening 11 for inserting a foreign object is opposed to the film body 8. Formed as follows.
[0024]
According to such a configuration of the present embodiment, since the spring wires 9 and 9 do not intersect with each other at the distal end portion 10 of the gripping portion 6, the opening portion 11 can be formed large and a foreign object can be gripped more reliably. It can be taken into the part 6.
[0025]
Needless to say, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. For example, although the foreign material collection | recovery tool which concerns on embodiment mentioned above is used as medical use, it can also be utilized for industrial use.
[0026]
【The invention's effect】
As described above, according to the foreign material collecting tool of the present invention, foreign materials such as stones can be reliably and easily gripped.
[Brief description of the drawings]
1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a side view with a partial cross section of a foreign matter collecting tool in a state in which an umbrella-like member is closed, and FIG. It is an expanded sectional view which follows an AA line.
2A is a side view having a partial cross section of the foreign matter collecting tool of FIG. 1 in a state where an umbrella-shaped member is opened, and FIG. 2B is an enlarged cross-sectional view taken along line BB of FIG. is there.
FIG. 3 shows a second embodiment of the present invention, and is a side view having a partial cross section of a foreign matter collecting tool in a state in which an umbrella-like member is closed.
4 is a side view having a partial cross section of the foreign matter collecting tool of FIG. 3 in a state in which an umbrella-like member is opened.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Tubular member 3 ... Operation wire 4 ... Handle 5 ... Sliding member 6 ... Holding part 7 ... Frame part 8 ... Film body 9 ... Spring wire 11 ... Opening part

Claims (4)

A tubular member;
A gripping part for collecting foreign matter provided to be openable and closable at the distal end of the tubular member;
Comprising a device for opening and closing the coupled to the proximal end side of the grip portion and the grip portion,
In the foreign matter collecting tool for holding and collecting foreign matter inside the grip portion by opening and closing the grip portion ,
The grip portion is composed of a frame portion and a film body formed by at least two wire members having a loop shape,
The film body is provided only on one side of the grip portion so that at least a part of the wire members on the front surface of the frame portion is connected by the film body, and an opening is provided on the other side of the grip portion. Foreign matter collecting tool characterized by The frame portion is arranged in a state where the two wire members intersect in a substantially cross shape when viewed from the front side,
The foreign matter collecting tool according to claim 1, wherein the film body is provided so as to cover a substantially half circumference of a front half portion of the frame portion in a longitudinal axis direction . In the frame portion, the two wire members are arranged substantially in parallel when viewed from the front side,
The foreign matter collecting tool according to claim 1 , wherein the film body is provided only on one side of the grip portion so as to connect two wire members of the frame portion . The film body is made of a resin film,
The resin film is formed of a transparent material
The foreign material recovery tool according to claim 1, wherein

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