JP2001286479A - Treatment appliance for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment appliance for endoscope to surely get hold of foreign matters and take it out with efficiency, despite the size and form of tissues or the foreign matters. SOLUTION: At the tip of an operation wire 15, which is inserted with ability to move backwards and forwards in a bendable tube 11, a gripper 3 is situated in the form of a basket with some gripper wires 16. At least one of gripper wires 16 consists of foldable one.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment instrument for an endoscope which is used in combination with an endoscope and has a grasping portion for grasping a tissue or a foreign substance from a lumen of a living body.

[0002]

2. Description of the Related Art Conventionally, there has been known a grasping and collecting tool (gripping forceps) which is used in combination with an endoscope to grasp and collect foreign matter in a body cavity. Japanese Patent Application Laid-Open No. Hei 9-19439 discloses a gripping and collecting tool in which a basket portion formed of a plurality of elastic wires is attached to a tip of an operation wire inserted into a sheath, and is pushed and pulled by the operation wire. The basket portion is expanded and contracted, and foreign matter such as calculus is taken into the basket portion to collect the foreign matter.

[0003] Further, in a gripping / recovering device disclosed in Japanese Patent Application Laid-Open No. 63-186641, a plurality of loop-forming elastic wires are connected to the distal end of an operation wire inserted into a sheath, and the distal end of the sheath is connected with the operation wire. A foreign substance such as a calculus is taken in between loops formed by a plurality of protruding elastic wires, and the foreign substance is collected.

[0004] In a gripping and collecting tool disclosed in Japanese Patent Application Laid-Open No. 10-137252, a collecting portion that can be opened in a basket shape by a plurality of elastic wires is provided at the tip of an operation wire inserted into a sheath, and the collecting portion is provided. This is a configuration in which a wide opening for taking in tissue or foreign matter is formed between a pair of constituent wires.

[0005]

[Problems to be Solved by the Invention]
In the basket-type gripping tool disclosed in Japanese Patent Application Laid-Open No. 9-19439, since the gripping wire is always exposed from the distal end of the sheath, when the gripping wire is inserted into the endoscope channel and the body lumen, the operating wire is used. There is a possibility that the elastic wire of the basket or the basket may be caught in the endoscope channel or the lumen, which makes it difficult to insert. Also, since the tip of the operation wire extends into the basket,
Depending on the size of the target tissue or foreign matter, the distal end portion of the operation wire may obstruct, and may not be grasped as intended.

In the holding and collecting tool disclosed in Japanese Patent Application Laid-Open No. 63-186641, the holding portion has a loop shape.
In the case of a large foreign substance, there is a possibility that it cannot be reliably held.

[0007] In the biological tissue collecting tool disclosed in Japanese Patent Application Laid-Open No. 10-137252, the target tissue or foreign matter is taken into the basket from the opening. Therefore, the direction of the opening of the basket must be adjusted to the tissue or foreign matter. It is difficult to take in.

(Object) The present invention has been made in view of the above-mentioned problem, and an object of the present invention is to securely grasp a tissue or a foreign matter irrespective of the shape or size of the tissue or the foreign matter. An object of the present invention is to provide a treatment tool for an endoscope that can be efficiently collected.

[0009]

(Means) The invention according to claim 1 provides a flexible sheath, an operating member inserted into the flexible sheath so as to be able to advance and retreat, and a distal end of the operating member. In a treatment tool for an endoscope having a grip formed in a basket shape from a plurality of flexible members, at least one of the plurality of flexible members constituting the basket-shaped grip can be folded. It is characterized by comprising a flexible wire.

According to a second aspect of the present invention, in the first aspect, the operating member is formed of an elastic wire, and a distal end of the operating member and a distal end of each of the flexible wires forming the basket-like gripper are provided. The proximal end of the flexible wire is an endoscope treatment tool connected to the flexible sheath near the distal end of the flexible sheath.

According to a third aspect of the present invention, there is provided a flexible sheath,
In an endoscope treatment tool having an operating member that is inserted into a flexible sheath so as to be able to advance and retreat, and a handle provided at a distal end of the operating member and formed in a basket shape from a plurality of flexible members, And the plurality of flexible members constituting the grip portion are divided into at least two or more units, and one operating member includes a proximal end of the flexible member of one or more units. The proximal end of the flexible member of the other unit is connected to at least one of the other operating members, and the distal end of the flexible member of each unit is united. It is characterized by the following.

(Function) According to the first and second aspects of the present invention, the basket-like gripper can be freely inserted into and removed from the flexible sheath, and the gripper has a basket shape and a loop-like shape. Since it can be freely selected, it is possible to efficiently grasp the tissue and the foreign matter regardless of the shape and size of the foreign matter. According to the third aspect of the present invention, the basket-like gripping portion can be deformed by the relative advancing and retreating operation of the two operation members, so that the tissue and foreign matter can be gripped efficiently.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A treatment tool for an endoscope according to a first embodiment of the present invention will be described with reference to FIGS.

(Structure) The treatment tool for an endoscope according to the present embodiment is an example of a basket-type grasping forceps. As shown in FIGS. 1 and 2, the grasping forceps 1 includes a flexible tubular insertion portion (sheath) 2 inserted into a body cavity, a grasping portion 3 that can advance and retreat within the insertion portion 2, An operation unit 4 for performing an operation of moving the grip unit 3 forward and backward.

The insertion section 2 has a flexible tube 11, which can be inserted into a body cavity through a channel of an endoscope (not shown). The flexible tube 11 is made of a tube material made of a resin such as fluororesin, polyethylene, polyimide, or the like, or a coil member wound tightly.

The grip portion 3 includes an operation wire (operation member) 15 made of an elastic wire such as stainless steel and a flexible thread-shaped grip wire 1 made of a resin material such as nylon.
6 and a tip member (tip tip) 17 for binding the distal ends of the operation wire 15 and the gripping wire 16 together. The proximal end of the gripper wire 16 is connected to the flexible tube 11.
Is connected and fixed to the inner surface near the distal end portion 18 of the main body.

The operating section 4 has an operating section main body 21 connected to the base end of the flexible tube 11, and a slider 22 is slidably mounted on the operating section main body 21. A slit 23 extending in the axial direction is formed in a base end portion of the operation section main body 21, and a finger hook ring 24 is connected to a base end of the operation section main body 21.

The proximal end of an operation wire 15 as an operation member extending from the inside of the flexible tube 11 of the insertion section 2 to the inside of the operation section main body 21 of the operation section main body 21 is connected to the slider 22. By operating the slider 22 forward and backward, the operation wire 15 advances and retracts inside and outside the flexible tube 11, and changes the shape of the grip portion 3.

When the distal end of the operation wire 15 is exposed outside the flexible tube 11, the grip portion 3 spreads as shown in FIG.
When the wire is pulled up to the tip position, the gripping portion wires 16 of the gripping portion 3 are in a state of forming a loop as shown in FIG. The operation wire 15 is connected to the flexible tube 1.
When the gripping portion 3 is drawn all the way into the inside, the grip portion 3 has a contracted shape as shown in FIG.

(Operation) The insertion portion 2 of the endoscope grasping forceps 1 is inserted into a treatment tool insertion channel of an endoscope (not shown).
The distal end of the flexible tube 11 is protruded from the channel distal end to near the target site.

Then, by pushing the slider 22 of the operation part 4 and moving the operation wire 15, the grip part 3 is expanded to a state as shown in FIGS. In the state shown in FIG. 1, the gripping portion wire 16 is widely opened in a basket shape, and foreign matter (including tissue) can be taken in and stored in the basket. Then, after the foreign matter is taken into the basket-like gripping part 3, when the operation wire 15 is further pushed in, each gripping part wire 16 firmly grips the foreign matter.

In the state shown in FIG.
When the operation wire 15 is pulled in after all of the members 6 open in a loop and the foreign matter is entangled in the loop, the gripping portion wire 16 firmly grips the foreign matter. In this case, since the distal end member 17 does not disturb, the calculus or the like to be grasped is not flipped, and the calculus or the like can be smoothly taken into the grip portion 3.

(Effect) By pushing and pulling the operation wire 15, the form of the grip portion 3 can be changed. That is, it is possible to select a shape of the grip portion 3 suitable for the shape and size of the foreign matter or its position. Therefore, foreign matters can be efficiently collected.

It should be noted that a multi-lumen tube having a plurality of holes through which at least the operation wire 15 and the grip portion wire 16 individually pass may be arranged at the distal end of the flexible tube 11. Further, the flexible tube 11 itself may be formed of a multi-lumen tube.

[Second Embodiment] An endoscopic treatment tool according to a second embodiment of the present invention will be described with reference to FIGS.

(Structure) The treatment tool for an endoscope according to the present embodiment is an example of a basket-type grasping forceps. As shown in FIGS. 5 and 6, the grasping forceps 31 includes a flexible tubular insertion portion (sheath) 32 inserted into a body cavity, a grasping portion 33 that can advance and retreat within the insertion portion 32, An operation unit 34 for performing an operation of moving the grip unit 33 forward and backward.

The insertion section 32 has a flexible tube 36, which can be inserted into a body cavity through a channel of an endoscope (not shown). Further, the flexible tube 36 is made of a resin tube material such as fluororesin, polyethylene, polyimide or the like, or a tightly wound coil member, as in the first embodiment.

The grip portion 33 includes a plurality of operation wires 3 as operation members made of an elastic wire such as stainless steel.
7, 38, a unit of a loop 41 composed of two gripping wires 41a and 41b made of an elastic stainless steel wire, and three gripping wires 42a made of the same elastic stainless steel wire , 42b,
A basket 42 composed of a unit 42c, a distal tip 45 for binding the distal end of the loop 41 and the distal end of the basket 42, and a distal end of one operation wire 37 and a proximal end of the loop 41 are put together. And a connection member 47 for connecting the distal end of the other operation wire 38 and the proximal end of the basket 42 together.

That is, the plurality of flexible wire members constituting the grip portion 33 are divided into at least two or more units, and one operation wire 37 is formed by a flexible wire member of a loop 41 constituting one unit. Certain gripping wire 4
The proximal ends of 1a, 41b are connected and other operating wires 38
Are connected to proximal ends of gripping wires 42a, 42b, 42c, which are flexible wire members of a basket 42 constituting another unit, and gripping wires 41a,
The distal ends of 41b, 42a, 42b and 42c are tied together. The operating section 4 has an operating section main body 50 connected to the base end of the flexible tube 36.
A first slider 51 and a second slider 52 are independently and slidably attached to 0. A slit 53 extending along the axial direction is formed in a base end side portion of the operation unit main body 50, and a finger hook ring 54 is connected to a base end of the operation unit main body 50.

The first slider 51 is connected to the proximal end of one operation wire 37 extending from the inside of the flexible tube 36 of the insertion portion 32 into the operation portion main body 50, and the second slider 52 is connected to the first slider 51.
From the inside of the flexible tube 36 of the insertion portion 32
It is connected to the proximal end of the other operation wire 38 that extends into zero.

(Operation / Effect) Each slider 51,
52, the operation wires 37,
38 move in and out of the flexible tube 36 together, and the shapes of the loop (one elastic wire bundle) 41 and the basket (the other elastic wire bundle) 42 of the grip portion 33 change in conjunction with each other.

The first slider 51 and the second slider 5
9 are separately shifted as shown in FIG. 9, the loop (one elastic wire bundle) 41 and the basket (the other elastic wire bundle) 42 of the gripper 33 are individually deformed, and as shown in FIG. It looks like the shape shown.

That is, when the first slider 51 and the second slider 52 are moved integrally, the size of the grip 33 can be changed together, and the first slider 51 and the second slider 52 can be moved together.
When the slider 52 is moved independently, the loop 41 of the grip 33 and the basket 42 are individually deformed. For this reason, the form of the grip part 33 can be optimally selected in accordance with the shape and size of the tissue or foreign matter to be gripped and collected. Other operations and effects are the same as those of the first embodiment.

The present invention is not limited to the above embodiments. Further, according to the above description, it is possible to obtain the items listed in the following supplementary notes and the items obtained by arbitrarily combining those items.

[Supplementary Notes] An endoscope having a flexible sheath, an operation member inserted into the flexible sheath so as to be able to advance and retreat, and a grip portion provided at a distal end of the operation member and formed in a basket shape from a plurality of flexible members. An endoscope treatment tool, wherein at least one of the plurality of flexible members constituting the basket-like gripping portion is formed of a foldable flexible wire.

2. The operation member is formed of an elastic wire, and a distal end of the operation member is connected to a distal end of each flexible wire forming the basket-like grip portion, and a proximal end of the flexible wire is flexible. 2. The treatment tool for an endoscope according to claim 1, which is connected to a flexible sheath near a distal end of the flexible sheath.

3. An endoscope having a flexible sheath, an operation member inserted into the flexible sheath so as to be able to advance and retreat, and a grip portion provided at a distal end of the operation member and formed in a basket shape from a plurality of flexible members. In a treatment tool, a plurality of flexible members that have a plurality of operating members and that constitute a grip portion are divided into at least two or more units, and one operating member has the flexibility of one or more units. The proximal end of the member is connected, the proximal end of the flexible member of another unit is connected to at least one of the other operating members, and the distal end of the flexible member of each unit is connected to one. A treatment tool for an endoscope, which is bound.

4. 4. The endoscope treatment tool according to claim 1, wherein the flexible member constituting the basket-like gripper is made of a thread-like material made of a resin such as nylon.

5. The treatment tool for an endoscope according to claim 4, wherein the flexible member is formed in a basket shape in advance and is foldable.

6. 4. The endoscope treatment tool according to claim 3, wherein the elastic modulus of the elastic wire is different between the first elastic wire bundle and the second elastic wire bundle.

7. 4. The endoscope treatment tool according to claim 3, wherein the flexible sheath is formed of a torque transmitting member.

[0042]

As described above, according to the present invention, the shape of the gripping portion can be selected to an appropriate form in accordance with the size and shape of the tissue or foreign matter, and the foreign matter can be collected reliably and efficiently. It is possible to provide an inexpensive and multifunctional endoscope gripper.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the vicinity of a distal end of a treatment tool for an endoscope according to a first embodiment of the present invention.

FIG. 2 is a side view showing the vicinity of an operation unit of the endoscope treatment tool according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a state in which a gripping wire of the gripping portion forms a loop in the treatment tool for an endoscope according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a state in which the grip portion wire of the grip portion is drawn into the flexible tube in the treatment tool for an endoscope according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing the vicinity of a distal end of a treatment tool for an endoscope according to a second embodiment of the present invention.

FIG. 6 is a side view showing the vicinity of an operation unit of the endoscope treatment tool according to the second embodiment of the present invention.

FIG. 7 is a cross-sectional view of an operation unit of the treatment tool for an endoscope according to the second embodiment of the present invention.

FIG. 8 is a perspective view showing an example of a shape formed by a grip portion in a treatment tool for an endoscope according to a second embodiment of the present invention.

9 is a side view of the operation unit showing an operation state for forming the shape of the grip unit shown in FIG. 8;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Basket type grasping forceps, 2 ... Insertion part (sheath), 3
... Grip part, 4 ... Operation part, 11 ... Flexible tube, 15 ...
Operation wire (operation member), 16 ... Grip part wire.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Minoru Tsuruta 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industrial Co., Ltd. (72) Inventor Yasushi Yasushi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Tatsuya Saito, Inventor 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Tadashi Tanishima 2-43-2, Hatagaya, Shibuya-ku, Tokyo Within Olympus Optical Co., Ltd. (72) Inventor Takeaki Nakamura 2-43-2 Hatagaya, Shibuya-ku, Tokyo F-term within Olympus Optical Co., Ltd. 4C060 EE22 GG36 4C061 AA00 BB00 CC00 DD00 GG15 HH21 JJ06

Claims (3)

[Claims] A flexible sheath, an operation member inserted into the flexible sheath so as to be able to advance and retreat, and a grip portion provided at a tip of the operation member and formed in a basket shape from a plurality of flexible members. Wherein at least one of the plurality of flexible members forming the basket-like gripping portion is formed of a foldable flexible wire. . 2. The flexible member according to claim 1, wherein the operating member is formed of an elastic wire, and a distal end of the operating member is connected to a distal end of each of the flexible wires forming the basket-shaped grip portion. The proximal end of the flexible wire is connected to the flexible sheath near the distal end of the flexible sheath. 3. A flexible sheath, an operating member inserted into the flexible sheath so as to be able to advance and retreat, and a grip portion provided at a tip of the operating member and formed in a basket shape from a plurality of flexible members. An endoscope treatment tool having a plurality of operation members, and a plurality of flexible members constituting a grip portion are divided into at least two or more units, and one operation member includes one or more The proximal end of the flexible member of the unit is connected, the proximal end of the flexible member of the other unit is connected to at least one of the other operating members, and the distal end of the flexible member of each unit. An endoscope treatment tool, wherein the ends are bound together.