JP2001269345A - Cell sampling tool for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cell sampling tool for an endoscope allowing enlargement of the inner diameter of a brush storing part than a prior art and sampling of many cells. SOLUTION: The cell sampling tool 100 for the endoscope comprises an operation member 30 having a wire 10 and brush bristles 20, an outer jacket tube 40, and a storing member 50. The storing member 50 is mounted to the tip of the outer jacket tube 40. In an inserting state of the operation member 30 into the outer jacket tube 40, the large diameter part 52 of the storing member 50 is structured so as to insert or remove the entire brush bristles 20. The storing member 50 is formed so as to have plastic deformation resistance larger than the outer jacket tube 40. Material forming the storing member 50 has elasticity allowing insertion into a bent clamp channel of the endoscope.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope cell collecting tool used to pass through a forceps channel of an endoscope and to collect cells in a body cavity.

[0002]

2. Description of the Related Art There is a cell sampling tool for an endoscope for collecting cells in a body cavity through a forceps channel provided in an endoscope. Such an endoscope cell collection tool is configured such that a wire and a tip of the wire are attached to a tip portion of the wire, and the hair foot extends in a radial direction of the wire, and the tip of the hair foot forms an outer diameter larger than the wire. An operating member having brush bristles for cell collection, and a mantle tube having an insertion hole through which the wire and the brush bristles are inserted and retracted inside, are configured so that the brush bristles can be taken in and out of the distal end of the mantle tube. It is configured to be. The mantle tube is formed of a flexible material to be inserted into the forceps channel of the endoscope. The larger the amount of cells attached to the brush bristles, the better, and it is necessary to increase the surface area of the brush bristles. Therefore, in order to make the bristle feet of the bristles as long as possible, it is necessary to make the inside diameter of the insertion hole of the mantle tube through which the bristles are inserted and accommodated as large as possible.

[0003]

However, the mantle tube is
In order to push this into the forceps channel, it must be flexible and have high stiffness (hardness), and a certain thickness of the mantle tube must be ensured. In addition, since the inner diameter of the forceps channel of the endoscope through which the mantle tube is inserted is, for example, about 2 mm to 2.8 mm, the outer diameter of the mantle tube must be in a range that can be inserted into the forceps channel. I can't get it. Therefore, there is a limit in increasing the inner diameter of the mantle tube, and thus, there is also a limit in increasing the length of the brush hair. The present invention has been devised in view of the above circumstances, and an object of the present invention is to increase the inner diameter of a brush accommodating portion for accommodating brush bristles so that an endoscope capable of collecting many cells can be obtained. An object of the present invention is to provide a cell sampling tool for a mirror.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a wire, a wire attached to a tip portion of the wire, and a bristle extending in a radial direction of the wire, and a tip of the bristle is formed. An operation member having an outer diameter larger than the wire and having cell collection brush bristles arranged along the length direction of the wire, and an insertion hole through which the wire can be inserted and retracted is formed. And a brush accommodating portion provided at the tip of the mantle tube, the cylindrical accommodating tube including a cylindrical wall and an accommodating space formed inside the cylindrical wall. In the endoscope cell collection tool having an inner diameter corresponding to the length of the bristle feet and a length corresponding to the arrangement length of the brush bristles and configured so that the entire brush bristles can be taken in and out, at least the cylindrical wall is Inside the curved channel of the endoscope Characterized in that it is formed so as to have a strength which is not plastically deformed even passed. Therefore, by reducing the wall thickness of the cylindrical wall within a range having a strength that does not cause plastic deformation even when the cylindrical wall is inserted through the curved channel of the endoscope, the inner diameter of the cylindrical wall can be maintained without changing the outer diameter of the mantle tube. Can be made larger than the conventional inner diameter of the insertion hole of the mantle tube through which the brush bristles are put in and out. Therefore, the bristle foot length of the brush bristles can be made longer than before, and a large number of cells can be collected.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing the configuration of the endoscope cell collection tool according to the first embodiment. The endoscope cell collection tool 100 includes a wire 10 and a brush hair 20.
The operating member 30 includes a mantle tube 40, a housing member 50, and the like. The operating member 30 is inserted into the insertion hole 42 of the mantle tube 40 so that the brush bristles 20 are located at the tip of the mantle tube 40. The wire 10 is made of, for example, a flexible wire formed by twisting a plurality of fine stainless steel wires, and is formed so that the outer diameter thereof is smaller than the inner diameter of the insertion hole 42 of the outer tube 40.

The brush bristles 20 are attached to the tip 10A of the wire 10. The brush bristles 20 are for cell collection and are spirally attached to the outer periphery of the wire 10. That is, the bristle feet of the brush bristles 20 extend in the radial direction of the wire 10. The tip of the bristle of the brush bristles 20 forms an outer diameter D1 larger than the diameter of the wire 10 (hereinafter referred to as the outer diameter D1 of the brush bristles 20). In addition, the brush bristles 20 have an arrangement length L1 along the length of the wire 10.
(Hereinafter referred to as the arrangement length L1 of the brush bristles 20),
The outer diameter of the brush bristles 20 is formed uniformly over the entire length in the arrangement length L1 direction. Rear end portion 10B of wire 10
Is moved by the operator when the wire 10 is moved in the reciprocating direction in the insertion hole 42 of the mantle tube 40.

The mantle tube 40 is a tube made of the same material as that of the related art, that is, a material having flexibility such as fluororesin or polyethylene resin.
The insertion hole 42 is formed with a uniform inner diameter through which the wire 10 can be inserted, and is configured so that the wire 10 is inserted so as to be able to advance and retreat in the length direction of the wire 10.

A housing member 50 is attached to the tip of the outer tube 40, and a brush housing portion 60 is provided by the housing member 50. The housing member 50 is formed in a cylindrical wall shape as a whole. The housing member 50 is connected to the large diameter portion 52 and the rear end side of the large diameter portion 52 and has an outer diameter smaller than the large diameter portion 52. And a small diameter portion 54. The large-diameter portion 52 corresponds to a cylindrical wall provided at the tip of the mantle tube described in the claims.

The small diameter portion 54 has an inside diameter substantially equal to the inside diameter of the insertion hole 42 of the mantle tube 40, and is formed so that the wire 10 can be inserted into the insertion hole 42 so as to be able to advance and retreat. A plurality of wedge-shaped portions 54A1 are formed on the outer peripheral surface 54A of the small-diameter portion 54, and the small-diameter portion 54 is attached to the front end 40 of the outer tube 40.
The wedge-shaped portion 54A1 inserted into the insertion hole 42A of A is engaged with the insertion tube 42A so that the wedge-shaped portion 54A1 is fitted and held in the outer tube 40 so as not to fall off.

The large diameter portion 52 has an inner peripheral surface 52A having an inner diameter D2 larger than the outer diameter D1 of the brush bristles 20. The length of the inner peripheral surface 52A is equal to the arrangement length L1 of the brush bristles 20. The inner peripheral surface 5 is formed with a length L2 larger than
The inner diameter D2 of 2A is formed with uniform dimensions over the entire length L2. The brush accommodating portion 60 for accommodating the brush bristles 20 inside the large diameter portion 52 by the inner peripheral surface 52A.
Is configured.

Further, the outer peripheral surface 52B of the large diameter portion is connected to the small diameter portion 5B.
4 is inserted into the front end portion 40 </ b> A of the mantle tube 40, and the large diameter portion 52 of the brush accommodating portion 60 and the insertion hole 42 of the mantle tube 40 are inserted.
Are located substantially coaxially, and the outer peripheral surface of the large diameter portion 52 and the outer peripheral surface of the outer tube 40 are formed to be flush with each other.

Further, the housing member 50 is formed so as to have greater strength than the outer tube 40. Housing member 5
0 is a material having such strength that it is not plastically deformed even when it is inserted through the curved forceps channel of the endoscope, and has such an elasticity that it can be inserted through the curved forceps channel of the endoscope. For example, hard plastic or metal. That is, in the first embodiment, the mantle tube 40
And the housing member 50 constituting the brush housing portion 60 is formed of different members. As the hard plastic, for example, a polyimide resin can be adopted. Further, as the metal, for example, a superelastic alloy such as stainless steel or a Ni—Ti alloy having extremely high elasticity can be used. Further, the housing member 50 has the above-mentioned condition, that is, a strength that does not undergo plastic deformation even when inserted through the curved forceps channel of the endoscope, and has such an elasticity that it can be inserted through the curved forceps channel of the endoscope. Since the housing member 50 is formed of a material that satisfies the following condition, the housing member 50 can protrude straight from the forceps port provided at the end of the forceps channel of the endoscope without bending.

The operation side end 46 of the mantle tube 40 includes:
A tapered portion 48 is provided in which the outer diameter and the inner diameter are expanded toward the rear end. A narrowed portion 49 in which the outer diameter and the inner diameter of the mantle tube 40 are narrower than other portions is formed on the front side of the tapered portion 48, and the inner diameter of the narrowed portion 49 contacts the outer peripheral surface of the wire 10. Thus, a frictional force is generated. This frictional force prevents the wire 10 from inadvertently moving in the forward and backward directions. The frictional force can be adjusted by the length L3 of the constricted portion 49 and the number of the constricted portions 49. In addition, the stenosis portion 49 is
The outer tube 40 may be formed by deforming the inner tube 0 by crushing it inward in the radial direction, or may be provided with a constricted portion 49 in advance when the outer tube 40 is formed.

The operating member 30 includes a rear end portion 1 of the wire 10.
OB is inserted into the housing member 50 and is led out of the opening of the tapered portion 48 of the operation side end 46 of the mantle tube 40, whereby insertion into the mantle tube 40 is performed, and the distal end portion 10A of the wire 10 is housed. It can be removed from the mantle tube 40 by removing it from the member 50.

Further, since the operation side end 46 of the mantle tube 40 is provided with the tapered portion 48, the operation member 30 is removed from the mantle tube 40 and the mantle tube 40 is used alone. The inside of the insertion hole 42 of the mantle tube 40 can be washed by injecting the washing solution with the syringe attached.

Next, the operation will be described. In the endoscopic cell collection tool 100, the operation member 30 is inserted into the mantle tube 40,
In addition, the brush bristles 20 are inserted into the forceps channel of the endoscope while being housed in the brush housing portion 60, and the mantle tube 40 is inserted into the body together with the forceps channel. In this state, the brush bristles 20 are transferred to the brush housing portion 60, that is, the housing member 50.
Projecting from the opening of the large diameter portion 52 of the wire 10 and pressing against the mucous membrane in the body cavity, grasping the rear end portion 10B of the wire 10 and
0 in the direction of the length of the brush bristles.
The mucous cells are scraped off and collected. Some of the cells collected here enter the gaps between the brush bristles 20 and some adhere to the brush bristles 20 such that the cells rise to the surface of the brush bristles 20.

Next, when the rear end portion 10B of the wire 10 is pulled toward the rear end side, the brush bristles 20 are drawn toward the brush accommodating portion 60 of the mantle tube 40, and the brush bristles 20 are accommodated in the brush accommodating portion 60. . At this time, the brush housing 6
The large-diameter portion 52 and the insertion hole 42 of the mantle tube 40 are provided substantially coaxially, and the inner diameter of the insertion hole 42 is formed as a small-diameter portion through which the wire 10 can be inserted.
Is restricted to a position substantially coincident with the axis of the large diameter portion 52. That is, in this example, the insertion hole 42 of the wire 10 is located at a position on the rear end side of the large diameter portion 52 of the mantle tube 40.
Is formed on the same axis as the axis of the large-diameter portion 52. The inner diameter D2 of the large diameter portion 52 of the housing member 50 is larger than the outer diameter D1 of the brush bristles 20. With these two configurations, the tip of the brush bristles 20 is
No ironing phenomenon that forcibly engages the edge of the brush 2 occurs, and the cells attached to the brush bristles 20 are prevented from falling off.
The smooth storage of the brush bristles 20 in the brush housing portion 60 becomes possible.

After the brush bristles 20 are stored in the housing space of the brush housing section 60 in this manner, the operation member 30
Is moved along with the mantle tube 40 into the forceps channel of the endoscope. When the mantle tube 40 is housed in the forceps channel of the endoscope, the mantle tube 40 is pulled out from the endoscope with the brush bristles 20 housed in the brush housing part 60.

According to the endoscope cell sampling device 100 configured as described above, the strength that the large diameter portion 52 of the brush housing portion 60 does not undergo plastic deformation even when inserted into the curved channel of the endoscope is improved. The thickness of the large diameter portion 52 can be reduced within the range. Therefore, the inner diameter D2 of the large diameter portion 52 can be made larger than before without changing the outer diameter of the conventional outer tube. Therefore, it is possible to collect a larger number of cells by making the outer diameter D1 of the brush bristles 20, that is, the length of the brush bristles 20, longer than before.

If the insertion hole 42 has an inner diameter through which the wire 10 can advance and retreat, the outer tube 40 needs to have an outer diameter smaller than that of the conventional outer tube. The brush hairs 20 can be moved in the reciprocating direction with the axes of the brushes almost aligned, and the cells to be collected can be prevented from falling off.

Next, a second embodiment of the present invention will be described. FIG. 2 is a longitudinal sectional view showing the configuration of the endoscope cell collection tool according to the second embodiment, and FIG. 3 is an explanatory diagram of the endoscope cell collection tool according to the second embodiment. FIG. 3A is an operation explanatory view showing a state in which the wire hairs are projected from the distal end portion of the outer tube, and FIG. 3B is an operation explanatory view showing a state in which the wire hairs are accommodated in the distal end portion of the outer tube. FIG. 4 is an operation explanatory diagram for explaining the operation when the position regulating member is not provided. 2 and 3, the same or corresponding parts as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The endoscope cell collection device 200 includes an operating member 130 having the wire 10 and the brush hairs 20 and the mantle tube 1.
40, a base member 150 and the like.
Operating member 130 so that brush bristles 20 are positioned at the tip of
Is inserted into the mantle tube 140, and the second embodiment differs from the first embodiment in that the mantle tube and its insertion hole also serve as a brush accommodating portion. That is, the mantle tube and the brush housing are formed of the same member.

That is, the mantle tube 140 has flexibility, the insertion hole 142 is formed with a uniform inner diameter D2 larger than the outer diameter D1 of the brush bristles 20, and the mantle tube 140 is flexible.
Has a strength that does not cause plastic deformation even when inserted through the curved forceps channel, and is configured to be as thin as possible in a range that maintains elasticity to the extent that it can be inserted through the curved forceps channel. ing. The material of the mantle tube 140 is
It is a material having a higher plastic deformation resistance than a conventional material, that is, a fluororesin or a polyethylene resin, for example, a hard plastic or a metal. As the hard plastic, for example, a polyimide resin can be adopted. Further, as the metal, for example, a superelastic alloy such as stainless steel or a Ni—Ti alloy having extremely high elasticity can be used. When a superelastic alloy is used, there is an advantage that a bending habit hardly occurs over the entire length of the mantle tube 140.

The operation side end 1 which is the rear end of the mantle tube 140
44 is provided with a base member 150 formed in a cylindrical wall shape. The base member 150 includes a first inner diameter portion 152 having substantially the same inner diameter as the outer diameter of the outer tube 140, and a first inner diameter portion 1.
52 and a second inner diameter portion 154 provided coaxially. The first inner diameter portion 152 is fixed to the operation side end 144 in a state where the operation side end 144 of the outer tube 140 is inserted. The second inner diameter portion 154 has an inner peripheral surface connected to the inner peripheral surface of the insertion hole 142 of the outer tube 140 in a state where the first inner portion 152 of the base member 150 is fixed to the rear end portion 144 of the outer tube 140. The inner peripheral surface is formed on the base member 150.
Has a tapered shape whose diameter increases toward the rear end.

The operating member 130 includes the wire 10, the brush bristles 20, the knob 132, the reinforcing pipe 134, and the like. The rear end portion 10B of the wire 10 has a column-shaped knob 132 that is gripped by the operator when the wire 10 is moved in the insertion / retraction direction in the insertion hole 142 of the mantle tube 40 so as to be coaxial with the wire 10. It is provided in. The knob portion 132 is formed to have an outer diameter D3 smaller than the inner diameter of the insertion hole 142 of the outer tube 140.
Further, the rear end of the wire 10 is inserted and fixed to the reinforcing pipe 134, and the rear end of the reinforcing pipe 134 is
It is fixed integrally to. This reinforcing pipe 134
It is provided to extend a predetermined distance along the length direction of the wire 10.

Further, position regulating members 134A and 134B (corresponding to the regulating means in the claims) are integrally attached to two places spaced apart in the length direction of the wire 10.
One position regulating member 134A is provided near the rear end side of the brush bristles 20 of the wire 10, and is positioned inside the mantle tube 140 so that the wire 10 is substantially coaxial with the insertion hole 142 of the mantle tube 140. Is provided so as to close an annular gap between the surface of the outer tube and the inner peripheral surface of the insertion hole 142 of the outer tube 140. Also, the other position regulating member 134
B is provided at an interval near the distal end side of the operation end 144 of the wire 10, and the wire 10 and the reinforcing pipe 134 are located substantially coaxially with the insertion hole 142 of the outer tube 140 in the outer tube 140. So, the reinforcement pipe 13
4 is provided so as to close an annular gap between the outer peripheral surface of the outer tube 4 and the inner peripheral surface of the insertion hole 142 of the outer tube 140. That is, the position regulating members 134A and 134B
0 is formed as a large diameter portion on the outer peripheral surface. The position regulating members 134A and 134B are made of an elastic material such as rubber, for example, and are configured to come into contact with the inner peripheral surface of the insertion hole 142 of the outer tube 140 to generate a frictional force. This frictional force prevents the wire 10 from inadvertently moving in the forward and backward directions.

The operation member 130 is formed by inserting the brush bristles 20 attached to the distal end portion 10A of the wire 10 from the second inner diameter portion 154 of the base member 150 provided at the operation side end 144 of the mantle tube 140. The operating member 130 can be removed from the outer tube 40 by inserting the operating member 130 into the outer tube 40 and removing the brush bristles 20 attached to the distal end portion 10A of the wire 10 from the distal end 141 of the outer tube 140. . On the contrary, the operation member 1
The operation member 130 is inserted into the mantle tube 40 by inserting the knob portion 132 of the operation member 30 from the distal end portion 141 of the mantle tube 140, and the knob portion 132 of the operation member 130 is
The operating member 130 can be removed from the mantle tube 40 by withdrawing it from the second inner diameter portion 154 of 50.

Further, since the second inner diameter portion 154 of the base member 150 provided at the operation side end 144 of the outer tube 140 has a tapered shape, the operating member 130 is removed from the outer tube 140 to use the outer tube 140 alone. In the state, the base member 15
By attaching a syringe (not shown) to the second inner diameter portion 154 of the “0” and injecting the cleaning liquid, the inside of the insertion hole 142 of the outer tube 140 can be easily cleaned.

Next, the operation will be described with reference to FIG. In the endoscope cell collection tool 200, the operation member 130 is inserted into the mantle tube 140, and
The endoscope 141 is inserted into the forceps channel of the endoscope while being housed in the interior 141A of the distal end portion 141, and the mantle tube 140 is inserted into the body together with the forceps channel. In the state shown in FIG. 3A, the brush bristles 20 are connected to the distal end 1 of the mantle tube 140.
41 and pressed against the mucous membrane in the body cavity, the wire 1
The grip portion 132 provided at the rear end portion 10B of the “0” is grasped and moved in the longitudinal direction of the wire 10, whereby the mucous cells are scraped and collected by the brush bristles 20. A part of the cells T collected here is the brush bristles 2
The brush hairs 20 enter the gaps 0 and partially adhere to the brush bristles 20 so as to rise to the surface of the brush bristles 20.

Then, as shown in FIG. 3B, when the knob 132 is pulled toward the rear end, the brush bristles 20 are drawn toward the tip 141 of the mantle tube 40, and the brush bristles 20 are drawn. It is housed inside the tip portion 141.
At this time, the operation member 130, that is, the wire 10 and the brush bristles 2 are actuated by the action of the position regulating members 134A and 134B.
0 is guided substantially coaxially with the mantle tube 140, so that the brush bristles 20 are smoothly housed in the distal end portion 141 of the mantle tube 140.

Further, since the inner diameter D2 of the outer tube 140 is larger than the outer diameter D1 of the brush bristles 20, there is no forcible engagement between the brush bristles 20 and the outer tube 140, and smooth storage is performed. There is no ironing phenomenon of the brush bristles 20 due to the tip portion 141 of the tube 140, and the cells attached to the brush bristles 20 are prevented from falling off. FIG. 4 shows a comparative example with respect to FIG. 3B, and shows a state where the position regulating members 134A and 134B are not provided. In this case, wire 10
And the brush bristles 20 are not located coaxially with the mantle tube 140, and since the wire 10 and the brush bristles 140 are inclined with respect to the axis of the mantle tube 140, the brush bristles 20 are forcibly attached to the distal end portion 141 of the mantle tube 140. The brush bristles 20 are not engaged in smooth storage, and the brush bristles 20 are squeezed by the distal end portion 141 of the mantle tube 140, so that the cells attached to the bristles 20 fall off.

In this manner, the distal end 1 of the mantle tube 140
After the brush bristles 20 are stored in 41, the operating member 130
Is moved along with the mantle tube 140 into the forceps channel of the endoscope. When the mantle tube 140 is housed in the forceps channel of the endoscope, the distal end 1 of the mantle tube 140 is moved.
41 with the brush bristles 20 stored therein,
Is pulled out of the endoscope.

According to the endoscope cell sampling device 200 configured as described above, the endoscope cell sampling device 200 is flexible and has a strength that does not cause plastic deformation even when the mantle tube 140 is inserted through the curved forceps channel. And the outer diameter thereof is as large as possible within a range that can be inserted through the forceps channel of the endoscope, and the mantle tube 140
Is configured so that the thickness of the mantle tube 140 is as thin as possible within a range in which elasticity is maintained such that the mantle tube 140 can pass through the curved forceps channel.
40 can be projected straight without bending, and the insertion hole 14 of the mantle tube 140 can be formed without changing the outer diameter of the mantle tube 140.
2 can be larger than the inside diameter of the conventional mantle tube insertion hole. Therefore, the outer diameter D1 of the brush bristles 20
Can be made larger than before, and a large number of cells can be collected.

For example, if the inner diameter of the forceps channel of the endoscope is 2
mm to 2.8 mm, the outer diameter of the mantle tube inserted into the forceps channel is 1.8 mm to 2.6 m.
m. With this outer diameter,
The outer diameter of the mantle tube is as large as possible within a range in which the mantle tube can be inserted through the forceps channel of the endoscope, and the outer tube has a strength that does not cause plastic deformation even when the mantle tube 140 is inserted through the curved forceps channel. It is possible to obtain flexibility even if the thickness of the mantle tube is made as thin as possible within a range in which the tube can be inserted into the curved forceps channel so as to be elastic enough.

In the second embodiment, the outer tube 140 in which the brush bristles 20 are accommodated corresponds to the cylindrical portion in the claims. Further, in the second embodiment, the position regulating members 134A and 134B as regulating means are formed as large diameter portions on the outer peripheral surface of the wire 130, but these position regulating members 134A and 134B are inserted into the insertion holes 142 of the outer tube 140. Can be formed as a small diameter portion on the inner peripheral surface of the insertion hole 142 by fixing to the inner peripheral surface. Also, as shown in FIG. 1, a narrowed portion in which the outer diameter and the inner diameter of the outer tube 40 are narrower than other portions is formed as in the narrowed portion 49 of the outer tube 140, and the inner peripheral surface of the insertion hole of the narrowed portion. Thus, a regulating means can be realized.

In the second embodiment, the mantle tube 14 is used.
The base member 1 having a tapered shape at the operation side end 144 of the base member 0
50, but instead of this base member, the mantle tube 14
The rear end of the zero may be formed to have a tapered shape.

[0037]

According to the present invention, there is provided a wire, wherein a hair attached to the tip of the wire extends in the radial direction of the wire, and the tip of the hair has a larger outer diameter than the wire. An operating member having a brush bristle for cell collection arranged along the length direction of the wire, an outer tube having an insertion hole through which the wire can be inserted and retracted, and a distal end of the outer tube And a brush accommodating portion constituted by a cylindrical wall and a housing space formed inside the cylindrical wall, wherein the housing space has an inner diameter corresponding to the bristle length of the brush bristle and the brush bristle. In the endoscope cell collection tool having a length corresponding to the arrangement length of the endoscope and configured so that the entire brush bristles can be taken in and out, at least the cylindrical wall is inserted through a curved channel of the endoscope. Has the strength not to be plastically deformed It is sea urchin formation. Therefore, by reducing the wall thickness of the cylindrical wall within a range having a strength that does not cause plastic deformation even when the cylindrical wall is inserted through the curved channel of the endoscope, the inner diameter of the cylindrical wall can be changed without changing the outer diameter of the outer tube. Can be made larger than the conventional inner diameter of the insertion hole of the mantle tube through which the brush bristles are put in and out. Therefore, the bristle foot length of the brush bristles can be made longer than before, and a large number of cells can be collected.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a configuration of a cell sampling tool for an endoscope according to a first embodiment.

FIG. 2 is a longitudinal sectional view showing a configuration of a cell sampling tool for an endoscope according to a second embodiment.

FIG. 3 is an explanatory view of a cell collection tool for an endoscope according to a second embodiment, and FIG. 3 (A) is an operation explanatory view showing a state in which wire hairs are projected from a distal end portion of an outer tube. FIG. 3 (B) is an operation explanatory view showing a state where the wire hairs are housed in the distal end portion of the mantle tube.

FIG. 4 is an operation explanatory diagram illustrating an operation when a position regulating member is not provided.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 100, 200 Endoscope cell collection tool 10 Wire 20 Brush bristles 30, 130 Operating member 40, 140 Mantle tube 50 Housing member 60 Brush housing part

Claims (11)

[Claims] 1. A wire and a hair attached to a distal end portion of the wire, the hair foot extending in a radial direction of the wire, and the tip of the hair foot forming an outer diameter larger than the wire, and An operating member having a brush bristle for cell collection arranged along the length direction, an outer tube formed with an insertion hole through which the wire is inserted so as to be able to advance and retreat, provided at a tip of the outer tube, It has a cylindrical wall and a brush accommodating portion composed of an accommodating space formed inside the cylindrical wall, and the accommodating space has an inner diameter corresponding to the bristle foot length of the brush bristle and an arrangement length of the brush bristle. An endoscope cell collection device having a corresponding length and configured so that the entire brush bristles can be taken in and out, wherein at least the cylindrical wall is plastically deformed even when inserted through a curved channel of the endoscope. Not shaped to have strength Endoscopic cell collection device, wherein it has, it is. 2. The endoscope cell collection tool according to claim 1, wherein the cylindrical wall of the brush accommodating portion and the insertion hole of the mantle tube are provided substantially coaxially. 3. A regulating means for guiding and regulating the wire on the same axis as the axis of the cylindrical wall is provided at a position on the rear end side of the cylindrical wall of the mantle tube. Endoscope cell collection tool. 4. The device according to claim 3, wherein the restricting means is formed as a large diameter portion on an outer peripheral surface of the wire or as a small diameter portion on an inner peripheral surface of an insertion hole of the mantle tube. Endoscope cell collection tool. 5. The material according to claim 1, wherein the material forming the cylindrical wall has such an elasticity that it can be inserted into a curved channel of the endoscope. Endoscope cell collection tool. 6. The brush bristles are formed so as to have a uniform outer diameter over the entire length of the arrangement length, and the accommodating space is formed such that the inner diameter is formed by the ends of the bristle feet over the entire length. The cell collection tool for an endoscope according to any one of claims 1 to 5, wherein the cell collection tool is formed of a cylindrical space having a uniform size larger than an outer diameter. 7. The method according to claim 1, wherein the thickness of the cylindrical wall is smaller than the thickness of the mantle tube.
Item 8. The cell collection tool for an endoscope according to Item 1. 8. The cell collection tool for an endoscope according to claim 1, wherein the material forming the cylindrical wall is hard plastic or metal. 9. The endoscope cell collection tool according to claim 8, wherein the metal is a superelastic alloy. 10. The endoscope cell collection tool according to claim 1, wherein the cylindrical wall and the mantle tube are formed of the same material. 11. The endoscope cell collection tool according to claim 1, wherein the cylindrical wall and the mantle tube are formed of different materials.