JPS6157777B2 - - 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 cytology brush that is inserted into the body cavity insertion portion of an endoscope to collect cells from an affected area in the body cavity.

As shown in FIG. 1, a cytodiagnosis brush 10 used in an endoscope is used by being inserted into a treatment instrument insertion channel 8 of a body cavity insertion section 5 of an endoscope 1. That is, the endoscope 1 includes a body cavity insertion section 5 formed of a flexible tubular member including a distal end section 2, a curved section 3, and a flexible section 4, an operating section 6 located outside the living body, and an eyepiece section. 7, a treatment instrument raising member 9 provided in the distal end portion 2, etc., and the cytodiagnosis brush 10 has its operation wire portion 10a pulled into an elastic flexible tube 81 made of a tightly wound coil. By passing the treatment instrument through the channel 8, it is detachably attached to the endoscope 1. The brush portion 10b of the cytodiagnosis brush 10 is formed at the tip of the operating wire portion 10a, protrudes from the elastic flexible tube 81, and extends from the tip 2 into the body cavity. There is. A large number of bristles 11 for cell collection are fixed to the brush 10b.

As is well known, the endoscope 1 is used for the bronchus, stomach,
It is inserted into a living body cavity such as the large intestine to observe and diagnose the affected area inside the body cavity. (not shown) is provided. The body cavity insertion section 5 is configured such that its curved section 3 is flexible so that it can be easily inserted into the body cavity and the affected area can be easily observed and diagnosed. It is relatively soft and bends elastically to some extent.

Further, the cytodiagnosis brush 10 is configured such that the body cavity insertion section 5 of the endoscope 1 is inserted into the body cavity, and the distal end portion 2 of the endoscope 1 is inserted into the body cavity.
While facing the affected area, the brush part 10b is protruded from the tip part 2, and by rubbing it against the affected area in the body cavity, the cell tissue of the affected area is collected. The cytology brush 10 with cell tissue attached is made of an elastic flexible tube 8
1 from inside the treatment instrument insertion channel 8 and taken out to the outside.

Conventionally, this cytology brush 10 is shown in FIG. 2a.
As shown in detail, the operating wire section 10 is formed by twisting two elastic wires together.
a, and is connected to the tip of this operating wire part 10a, is formed into a long and thin ring-shaped loop by twisting two elastic wires, and has a large number of bristles 11 sandwiched between the two wires. This is fixed with a brush part 10b formed like a tortoise scrubbing brush.
and a connecting pipe 12 for connecting the operating wire portion 10a and the brush 10b.

Further, FIG. 2b shows another example of the conventional cytodiagnosis brush, and this cytodiagnosis brush 20
In the cytodiagnosis brush 10 shown in FIG. 2a, the wire rod forming the operating wire portion 10a and the wire rod forming the brush portion 10b are integrally formed. Similar to the brush 10, the operating wire section 20a, the brush section 20b,
and a connecting pipe 22, and bristles 21 are fixed to the brush portion 20b.

Cytology brush 10, 20 formed in this way
The operating wire portions 10a, 20a are drawn into the elastic flexible tube 81 and inserted through the treatment instrument insertion channel 8 of the endoscope 1, and the portion near the distal end is connected to the flexible tube. 81 and is flexibly bent according to the bending motion by the raising member 9, and is inserted through the flexible tube 81 formed of the densely wound coil, and the brush portions 10b and 20b are moved forward and backward. It is made of hard elastic wire so that it can withstand these operations. On the other hand, the brush part 10
The wire rods forming b and 20b are made by inserting hairs 11 and 21 between the two twisted wire rods,
Since this is fixed, it is necessary to use a soft elastic wire so that these hairs 11 and 21 are difficult to come off. That is, the bristles 11,
By pinching and twisting the hairs 21 together, the hairs 11 and 21 are tightly bound together, making it difficult for the hairs 11 and 21 to come out, and making it easier to process than when the hairs 21 are twisted together.

Therefore, as shown in FIG. 2a above, the conventional cytodiagnosis brush 10 includes an operating wire portion 10a made by twisting two hard elastic wires together;
A brush part 10b formed into a long and thin ring-shaped loop is made by twisting the soft elastic wires of a book, sandwiching the bristles 11, and connecting them with the connecting pipe 12, and soldering them into one piece. I am trying to fix it to . Further, the conventional cytodiagnosis brush 20 shown in FIG. 2b above uses two hard elastic wire rods, and the portions of both wire rods near the tips forming the brush portion are subjected to heat treatment such as annealing. The soft portions are twisted together, and the hard portions of the non-annealed portions are twisted together, and when the wires are twisted together, the brush portion 20b is inserted between the wire rods in the soft portions. Forming hair 21
This is then fixed as shown in FIG. 2b.

By the way, the conventional cytodiagnosis brushes 10 and 20 configured as described above have bristles 11 and 21 sandwiched between two twisted wires to form brush parts 10b and 2.
0b is formed, but in the manufacturing process of twisting the two wire rods together and sandwiching the hairs 11 and 21, both ends of both wire rods are grasped and the wire rods are twisted from these both ends, so this wire rod The twist from both ends is not sufficiently transmitted to the middle part of the part, and the hairs 11 and 21 held by the wire in this middle part are
The drawback was that it easily fell off. Further, the wire rods having the bristles 11 and 21 sandwiched therebetween are twisted together in this way and bent into a long and thin ring-shaped loop to form a brush part 1 as shown in FIGS. 2a and 2b.
0b, 20b, the strands bent into a U-shape at the center are spread out, and the hairs 11 and 21 held in this U-shape bend are very difficult to pull out. The drawback is that it is easier.

In this way, the conventional cytodiagnosis brushes 10 and 20 shown in FIGS. 2a and 2b have brush parts 10b and 20.
Since the wire is formed by bending the wire b into an elongated ring-shaped loop, it is impossible to manufacture the wire using only hard wire.

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned drawbacks of the conventional methods, an object of the present invention is to bend at least two wires at their central portions into a hairpin shape, and to cross each other with the U-shaped portions at the ends of each bend. By connecting and twisting the two bent wires together, a hair-like member is sandwiched between the two wires to form a brush part,
It is an object of the present invention to provide a cytodiagnosis brush for an endoscope, which is constructed by having both brush parts parallel to each other and in close contact with each other.

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

As shown in FIG. 3, the cytodiagnosis brush 30 of this embodiment is made by bending the central portion into a hairpin shape and twisting the two folded wires together.
A long wire 33 that forms a brush portion 30b by sandwiching a hair-like member 33d at a portion 33b near the tip between both wire rods, and forms an operating wire portion 33a at a portion that does not sandwich the hair-like member 33d; By bending the wire into a hairpin shape and twisting the two folded wires together,
The short wire 34 which forms the brush portion 34b by sandwiching the hair-like member 34d between the two wires, and the U-shaped portions 33c, 34c at the bent ends of the wires 33, 34 are are connected to form a brush head, and both brush parts 30b,
34b are brought into close contact with each other in parallel to the end portion 34 of the wire rod 34.
and a coupling pipe 32 for fixing the wire a to the operating wire portion 33a.

The cytodiagnosis brush 30 of the present invention constructed as described above is used in the same manner as the conventional cytodiagnosis brushes 10 and 20 shown in FIGS. 1 and 2 above.

Next, a method for manufacturing the cytodiagnosis brush 30 of the present invention will be explained with reference to FIGS. 4 and 5.

As shown in FIG. 4, first, the brush portion 34b
and the brush portion 30b.
and a long wire 33 forming the operation wire portion 33a. Next, both wire rods 33,3
4 is bent to form a hairpin shape, and a U-shaped portion 33 is formed at the tip of each bend.
c and 34c are crossed and connected to each other. After that,
Between the short wire rods 34 folded in half and above 2
Hair-like members 34d,
33d is inserted and arranged. The wire rods 33 and 34 each folded in half are held at both ends and twisted in opposite directions.

Then, by this twisting, the hair-like member 3
3d and 34d are tightly clamped and fixed to the respective wire rods 33 and 34, and form brush portions 30b and 34b, respectively, as shown in FIG. Also,
Through this step, the operating wire portion 33a is formed in the portion of the wire 33 that does not hold the hair-like member 33d.

Next, the U-shaped portions 33c and 34c of the bent tips of both brush portions 30b and 34b are arranged adjacent to each other in the same direction to form a brush head.
By bending the connecting portion between the character-shaped portions 33c and 34c, the brush portions 30b and 34b are made parallel to each other, and brought into close contact with each other to form the brush portion 3.
4b is fixed to the operating wire portion 33a by a connecting pipe 32. The cytology brush according to the present invention is manufactured as described above.

In addition, in the above manufacturing method, the brush 30 was manufactured using the short wire rod 34 and the long wire rod 33, but in this case, two sets of the brush part and the operation wire part were made by the two long wire rods 33, and one Alternatively, the long wire 33 may be folded in half into a hairpin shape corresponding to the other brush part 34b without bending the long wire 33 from its center. The brush portion 30b may be formed by twisting only the folded portions.

In this case, the wire portion is formed not from twisted wires but from one single wire.

As explained above, according to the present invention, the brush part 3 which clamps and fixes the hair-like members 33d and 34d
Since the brush 30 is formed by combining two pieces 4b, 30b in parallel, the brush parts 10b, 2 in the conventional brushes 10, 20 shown in FIG.
Compared to the case where one long wire is formed into a loop shape like 0b, the length of the wire in the portion forming the brush parts 30b and 34b can be half the length of the conventional wire. Therefore, the amount of clamping force of the wire rods that clamp the hair-like members becomes stronger, and a very remarkable effect of making it difficult for the hairs to fall out is exhibited. Also,
For the same reason, the length of the brush section can also be made longer than the length of the conventional brush section, so that
Many cells can be collected.

Furthermore, according to the present invention, the clamping force of the wire is increased, and the brush portion is not formed in a loop shape, making it possible to manufacture a cytodiagnosis brush using only hard wire.

In addition, since the tip head of the cytodiagnosis brush of the present invention is formed by a U-shaped part made by bending a wire into a hairpin shape, the rounded tip of this U-shaped part can be inserted into the body cavity. Even if it comes into contact with the body wall, it will not cause any damage to the body wall. Therefore, there is no need to attach special fittings to round the tip as with conventional ones.

In the above embodiment of the present invention, a cytodiagnosis brush composed of two brush parts 30b and 34b has been described, but the number of brush parts 34b is of course not limited to two. It is. Further, in the above embodiment, the brush portion 30
The operating wire portion 3 is connected to the wire rod 33 forming b.
3a is formed integrally and continuously with the brush part 30b, but it may also be formed separately from the brush part 30b and connected to the brush part 30b by the coupling pipe 32. In this case, a plurality of brush portions 34b may be made.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of a conventional cytology brush used in an endoscope, FIGS. 2a and b are front views showing conventional cytology brushes, and FIG. FIGS. 4 and 5 are a front view of a cytodiagnosis brush showing one embodiment of the present invention, and are diagrams showing the manufacturing process of the cytodiagnosis brush shown in FIG. 3, respectively. 1...Endoscope, 30...Cytology brush, 30
b, 34b...brush part, 33a...operation wire part, 33...long wire rod, 34...short wire rod, 3
3c, 34c... U-shaped portion, 33d, 34d...
Hair-like member, 32... joint pipe.

Claims (1)

[Claims] 1 U formed by bending a plurality of wires into a U shape
A brush head whose letter-shaped parts are connected in advance by intersecting each other, a plurality of brush parts formed by pinching and twisting hair-like members with each of the above-mentioned wire rods, and these brush parts are closely attached in parallel. A cytodiagnosis brush for an endoscope, comprising: a connecting pipe that fixes the end thereof;