JPH0126298B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cytodiagnosis brush for an endoscope that is introduced into a body cavity through an insertion channel of an endoscope to collect cells.

In general, it is known that in order to collect cells within a living body cavity, a brush is introduced into the body cavity through an insertion channel of an endoscope, and the brush is brought into sliding contact with the surface of the body cavity. . The above-mentioned brush is formed by twisting a plurality of wire rods together and sandwiching brush bristles between the wire rods at the tip thereof to form a brush portion. Therefore, when the brush portion is brought into sliding contact with the surface inside the living body cavity, the brush bristles must be securely sandwiched between the wires so that they do not fall out.

Conventionally, the above-mentioned cytology brush has been made by twisting the parts of multiple wires except for the tip, and then heat-treating the tip by applying an electric current to make this part softer than other parts. By pinching and twisting the brush bristles, the bristles are securely attached to the tip. However, with this configuration, workability is extremely poor because heat treatment is required to soften the tip of the wire, and an oxide film is formed on the wire by heat treatment, so electrolytic polishing is not required. It takes time and effort to remove it.
Furthermore, if the tip is softer than other parts, when the brush comes into sliding contact with the surface of the body cavity, the tip tends to bend from the boundary with the hard part, making it difficult to use. There was a problem.

This invention was made based on the above-mentioned circumstances, and its purpose is to eliminate the need for heat treatment, and to make the wire rods twisted together have uniform hardness over the entire length. can be reliably sandwiched between the above wire rods, and
To provide a cytodiagnosis brush for an endoscope whose brush part is not easily bent during use.

An embodiment of the present invention will be described below with reference to the drawings. 1 in the figure is a cytology brush. This cytodiagnosis brush 1 is made by twisting a wire rod made of a plurality of steel wires, etc. (in this embodiment, two wire rods 2, 2), and inserting brush bristles 3 such as nylon fibers into the tips of the wire rods. A brush portion 4 is formed. Of the two wire rods 2, 2, one is hard and the other is soft.

That is, in order to construct the cytodiagnosis brush 1, first, the parts of the two wire rods 2, 2 except for the tips are twisted together, the brush bristles 3 are sandwiched between the tips, and then the wire rods 2, 2 are twisted together. The brush portion 4 is formed by twisting the tip portion more tightly than the other portions.

According to the cytology brush 1 having such a configuration, 2
Since one of the wire rods 2, 2 is hard and the other is soft, when these wire rods 2, 2 are twisted together, the soft wire rod 2 is wound around the hard wire rod 2, and the two are brought into close contact with each other. Therefore, in the brush portion 4, the brush bristles 3 sandwiched between the wire rods 2, 2 are reliably held by the wire rods 2, 2 that are trying to come into close contact with each other, so that the brush bristles 3 during use are It can eliminate shedding.

In addition, since the two twisted wire rods 2, 2 of the cytodiagnosis brush 1 have uniform hardness over the entire length, when the brush portion 4 is brought into sliding contact with the surface inside the body cavity during use, Also, the brush portion 4 is not easily bent.

Note that this invention is not limited to the above embodiment,
For example, the number of wire rods to be twisted together may be two or more, and in that case, if at least one of the wire rods is soft, the same effect as in the above embodiment can be obtained.

As described above, the present invention provides a cytodiagnosis brush in which a brush portion is formed by twisting a plurality of wire rods together and fixing brush bristles between the wire rods at the distal end thereof. A soft wire material that is softer than other wire materials was used for the book. Therefore, since the plurality of wire rods come into close contact with each other so that the soft wire rod is wrapped around the hard wire rod, the brush bristles can be reliably caught between the tip portions of the wire rods. In other words, the brush bristles can be reliably clamped between the wire rods without softening the ends of the wire rods by heat treatment as in the past, so it is possible to remove the oxide film formed on the wire rods by heat treatment and heat treatment. Since no work is required, the productivity of the cytodiagnosis brush can be increased. Also,
Since the plurality of wire rods twisted together have uniform hardness over the entire length, the brush part does not easily bend when the brush part is brought into sliding contact with the inner surface of the living body cavity.

[Brief explanation of drawings]

The drawing is a block diagram of a cytodiagnosis brush showing an embodiment of the present invention. 2...Wire rod, 3...Brush hair, 4...Brush part.

Claims (1)

[Claims] 1. In a cytodiagnosis brush that forms a brush part in which a plurality of wire rods are twisted together and bristles are sandwiched and fixed between the wire rods at the tip thereof, at least one of the wire rods is made of a soft wire material that is softer than the other wire rods. A cytology brush for endoscopy, characterized by using.