JPH0260B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cytology brush for an endoscope, specifically,
The present invention relates to a cytodiagnosis brush for an endoscope, which is introduced into a living body cavity through a treatment tool insertion channel of the endoscope to scrape and collect tissue cells.

As is well known, the endoscopic cytodiagnosis brush is inserted into the channel for inserting the treatment instrument of the endoscope, and the brush part provided at the tip of the operating wire is rubbed against the inner wall of the body cavity. , a type of endoscopic treatment tool that scrapes and collects tissue cells.

A conventional cytodiagnosis brush for this type of endoscope has been constructed as shown in FIG. 1, for example. That is,
A conventional endoscopic cytodiagnosis brush 1 has bristles 3 inserted between the front half of a relatively short brush attachment wire 2 formed by twisting two elastic wires together, and rubbing the strands of the wire 2 together. A brush part 4 is formed in the same part by inserting the brush part 4, and the latter part of the brush attachment wire 2 formed with this brush part 4 is attached to the tip of the operating wire 5 made of an elastic wire formed into a spiral shape. The main part is constructed by screwing the brush attachment wire 2 into one body with the operating wire 5. A round head fitting 6 is attached to the tip of the brush portion 4 to prevent damage to the inner wall of the body cavity. When integrating the brush mounting wire 2 and the operation wire 5, the brush mounting wire 2 is twisted to form a 2.
Since the interval between the peaks of the elastic wire rod, that is, the pitch, corresponds to the pitch of the spiral shape of the operating wire 5, the brush mounting wire 2
By twisting, the twisted peaks of the wire 2 bite into the spiral valleys of the operating wire 5, and the wire 2 is fixed to the operating wire 5.

Further, as shown in FIG. 2, in another conventional endoscopic cytodiagnosis brush 7, the end portions 2 of two elastic wires at the rear end portion of the brush attachment wire 2 are
a, 2b toward the outside, and this end 2a, 2
b is inserted between the helical elastic wires from the tip of the operating wire 5, and then the brush attachment wire 2 is twisted and fixed to the operating wire 5.

However, as described above, both of the endoscopic cytodiagnosis brushes 1 and 7, which are formed by integrating the brush attachment wire 2 into the operating wire 5 by twisting the brush attachment wire 2, cannot be used, for example, in the third As shown in the figure, the channel 8 for inserting the treatment instrument of the endoscope
When inserting the brush, a twisting motion may be applied to the brush portion 4 to rotate the brush portion in the direction of the arrow A shown in the figure, or as shown in FIG. When collecting the
In order to efficiently entangle the cells with the bristles 3 of the brush portion 4, if a rotational movement in the direction shown by arrow B is applied other than the back and forth movement along the axial direction, at this time, the cytodiagnosis brushes 1 and 7 If the direction of rotation is opposite to the twisting direction of the two elastic wires of the brush attachment wire 2, there is a risk that the brush wire 2 will come off the front end of the operating wire 5 and fall into the body cavity. Ta.

In view of the above-mentioned conventional drawbacks, an object of the present invention is to bend the tip of an elastic wire to form a closed-loop brush holder that can be opened and closed, and to attach and detach a brush member made of radially flocked hair to this brush holder. To provide a cytology brush for an endoscope which can be freely attached.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

FIG. 5 is a front view of an endoscopic cytodiagnosis brush showing an embodiment of the present invention. This endoscopic cytodiagnosis brush 11 includes one flexible operating wire 12 and a brush member 14 detachably attached to a brush holder 13 formed at the tip of the operating wire 12. It is configured.

As shown in FIG. 6, the operating wire 12 is made by bending a single straight flexible elastic wire at right angles at four points at its tip, so that the most straight line part 12a is bent to the original main line. A rectangular closed loop brush holder 13 is formed by the linear parts 12b, 12c, and 12d, and the other parts are kept straight and the main straight line The rear end of the portion 12e serves as a hand-side operating portion 12f.

As shown in FIG. 7A, the brush member 14 is made by radially aligning and polymerizing the bristles 15 forming the brush member 14 to form a short cylindrical shape as a whole, as shown in FIG. 7B. , only the center part is fixed with adhesive to form a bearing part 16, and this bearing part 16
A circular bearing hole 16a is bored in the shaft. Note that when the bristles 15 of the brush member 14 are made of a thermoplastic resin such as nylon resin, the bearing portion 16 is formed by heat fusion without using an adhesive, and the bearing hole 16a is bored in the bearing portion 16. You may also set it.

The brush member 14 manufactured in this way is cut into a short cylindrical shape by cutting around the bristles 15 to have a predetermined size and shape, and then the brush holder 14 is placed at the tip of the operating wire 12.
Can be attached to 3. When attaching the brush member 14 to the brush holder 13, as shown in FIG.
is expanded in the direction of arrow C to separate it from the main straight part 12e of the operating wire 12 against the spring behavior of the brush holder 13, and in this state, the straight part 1
2a into the bearing hole 16a of the brush member 14.
This brush member 14 is positioned at the straight part 12d by moving each straight part 12a, 12b, 12c of the brush holder 13. after this,
By returning the most distal straight section 12a to the state where it is in contact with the main straight section 12e, the brush holder 13 becomes in a closed loop shape again, as shown in FIG.
The straight part 1 for the same support shaft uses the straight part 12d of 3 as the support shaft.
2d so as to be rotatably held.

Next, the operation of the endoscopic cytodiagnosis brush 11 configured as described above will be explained.

First, as in the conventional case, the cytodiagnosis brush 11 is inserted into the treatment instrument insertion channel 8 (the third
(see figure), the brush member 14 is made to protrude from the distal end of the endoscope, and the brush member 14 is brought into pressure contact with the inner wall 9 of the body cavity, as shown in FIG. Next, when the operating wire 12 is moved back and forth in the longitudinal direction of the wire 12, the brush member 14 moves around the support shaft straight portion 12d, and the bristles 15 move against the inner wall of the body cavity.
Rotate while rubbing. For this reason, hair 15
The tissue forming the inner wall 9 of the body cavity is hooked onto the tip of the hair 15, and the tissue cells are entangled with the hair 15. Therefore,
If the operating wire 12 is moved back and forth significantly, many tissue cells will be scraped and collected over the entire circumference of the brush member 14. At this time, the brush holder 1
3 maintains a rectangular closed loop shape, and the brush member 1
4 is reliably supported by the support shaft linear portion 12d, so it will not fall off from the brush holder 13.

FIG. 10 is a cross-sectional side view of a bearing portion of a brush holder of a cytodiagnosis brush for an endoscope showing another embodiment of the present invention. This cytology brush 17 is
A bearing hole 16b having a polygonal shape such as a quadrangle is formed in the bearing portion 16 of the brush member 14A, and
The brush member 14 passes through this bearing hole 16b.
The cross-sectional shape of the support shaft linear portion 12d ₀ of the brush holder 13A for supporting the brush holder A is formed into a polygonal shape in accordance with the shape of the bearing hole 16b.

Cytology brush 1 for endoscope configured in this way
7, the cytodiagnosis brush 17 is inserted into the body cavity through the treatment instrument insertion channel 8 of the endoscope (see FIG. 3), the brush member 14A is pressed against the body cavity inner wall 9, and the operation wire 12 is inserted into the body cavity. When the brush member 14A is moved back and forth, the brush member 14A is rubbed against the inner wall 9 of the body cavity without rotating, since the brush member 14A is not rotatable with respect to the linear portion 12d ₀ for the support shaft. Therefore, even if the back and forth movement of the operating wire 12 is not so large, the brush member 14A
The tips of the bristles 15 of the brush member 14A strongly rub the tissue cells on the inner wall 9 of the body cavity, and many cells become attached to the bristles 15 of the brush member 14A.

The brush member 14 is shaped into a short cylindrical shape by cutting around the bristles 15 so that the length of the bristles is constant.
The brush member 14B having a fallen cylinder shape shown in the figure, the 12th
Triangular prism-shaped brush member 14C shown in the figure, 13th
A hexagonal prism-shaped brush member 14D shown in the figure can be manufactured and used in the same manner as the brush members 14 and 14A described above. These brush members 14
B, 14C, 14D are the circular brush members 1
It has an advantage over 4, 14A in that tissue cells are better caught in the protruding parts.

Other brush members 14 include, for example, a thin metal plate or plastic in which one end of bristles 15 arranged in parallel is bent to have a U-shaped cross section as shown in FIG. 14A. As shown in FIG.
Brush member 14 by bending 8 into a circular shape.
E may be formed. Clamp member 1
8 into a circular shape and joining the ends together, the clamp member 18 has a bearing hole 18 in the center.
The bearing part 18A has a shape of 1.
5 are arranged radially. Furthermore, as shown in FIG.
5 is implanted, glued or fused to form the brush member 14.
F may also be formed. This bearing member 1
As the material of 9, any material such as metal, plastic, or wood can be used.

The shape of the closed loop brush holder formed at the tip of the operating wire 12 is the rectangular brush holder 1 shown in FIG.
In addition to the brush holder 13B, the brush holder 13B may have any shape, such as a triangular brush holder 13B shown in FIG. 16 or a circular brush holder 13C shown in FIG.
And these brush holders 13B, 13C
are in contact with each other along the main straight parts 12e ₁ and 12e ₂ , respectively, to form _a closed loop. Therefore, the straight parts _{12a 1 and} the main straight parts 12e ₁ between the straight portion 12
By widening the space between a ₂ and the main straight portion 12e ₂ in the same manner as shown in FIG. 8, brush members of various shapes can be easily attached to and detached from these brush holders 13B and 13C. By restoring the deformed brush holders 13B, 13C to their original closed-loop shape by spring behavior or external force, the brush members attached to these brush holders 13B, 13C are prevented from falling off from the brush holders during use. Nothing happens.

As described above, according to the present invention, a single wire is bent to form a closed-loop brush holder at its tip, and this brush holder holds the brush member, so that the wire can be operated in various directions. Even if movement is applied, there is no risk of the brush member falling off as in the conventional case. In addition, since the closed loop of the brush holder can be opened and closed, the brush member is detachable, and the old brush member can be easily replaced with a new one, or brush members of various shapes can be easily replaced, resulting in an inexpensive configuration. It exhibits excellent effects such as being able to.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing an example of a conventional cytodiagnosis brush for an endoscope, FIG. 2 is a sectional view of a main part showing another example of a conventional cytodiagnosis brush for an endoscope, and FIG. The figure is a sectional view of the main part when the cytology brush shown in Fig. 1 above is inserted into the treatment instrument insertion channel, and Fig. 4 is a sectional view of the main part of the cytology brush shown in Fig. 2 above when it is in use. 5 is a front view of a cytodiagnosis brush for an endoscope showing an embodiment of the present invention, and FIG. 6 is a view of the operating wire before the brush member of the cytodiagnosis brush shown in FIG. 5 is attached. Front view, Figure 7 A, B
9 is a perspective view sequentially showing the manufacturing process of the brush member of the cytology brush shown in FIG. 5, FIG. 8 is a front view of the cytology brush shown in FIG. The figures are a side view of the cytology brush shown in FIG. 5 when in use, FIG. FIG. 13 is a perspective view showing examples of shaping of other brush members used in the endoscopic cytodiagnosis brush of the present invention, and FIGS. 14A and B
15 is a perspective view and a front view sequentially showing the manufacturing process of yet another brush member used in the endoscopic cytodiagnosis brush of the present invention, and FIG. FIGS. 16 and 17 are front views showing examples of shapes of other brush holders of the operation wire used in the endoscopic cytodiagnosis brush of the present invention. It is. 1, 7, 11, 17... Cytology brush for endoscope, 3, 15... Hair, 5, 12... Operation wire (wire), 13, 13A to 13C... Brush holder, 14, 14A to 14F ...brush member,
16a, 16b, 18a...bearing holes.

Claims (1)

[Claims] 1. A brush holder in the form of a closed loop that can be opened and closed by bending the tip of an elastic wire,
An endoscope characterized in that a brush member having a bearing hole in the center for passing the wire of the brush holder and having bristles arranged radially around the periphery is detachably attached to the brush holder. Cytology brush for mirror. 2. The cytodiagnosis brush for an endoscope according to claim 1, wherein the cross-sectional shape of the wire of the brush holder and the shape of the bearing hole of the brush member are polygonal.