JP2001340345A - Cytodiagnosis brush for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cytodiagnosis brush for an endoscope wherein brush bristles are less prone to drop off, and in addition, which can be manufactured by a simple working. SOLUTION: This cytodiagnosis brush for an endoscope is formed by pinching a large number of brush bristles 2 between two hard wires 1 being twisted. In such a cytodiagnosis brush for an endoscope, at least one of the hard wires 1 is formed in such a manner that a flexible synthetic resin coating 1b is applied to the surface of a hard strand 1a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cytology brush for an endoscope which is used to collect cells in a body through a treatment tool insertion channel of an endoscope.

[0002]

2. Description of the Related Art A conventional cytology brush for an endoscope is generally formed by sandwiching a large number of brush hairs between two twisted metal hard wires.

[0003]

However, in a configuration in which brush bristles are sandwiched only between two twisted metallic hard wires, the twist of the two wires is reduced during repeated use. Just loosening may cause the brush hairs sandwiched between them to fall off.

On the other hand, if the twist of the two wires is too strong, the brush hairs sandwiched between the wires are damaged, and the brush hairs are more likely to fall off. In addition, there is a type in which a large number of brush bristles are integrally molded to prevent falling off (Japanese Utility Model Publication No. 62-11604). It is difficult to manufacture the brush part accurately.

[0005] Therefore, the present invention is intended to prevent brush hair from falling off easily.
Moreover, an object of the present invention is to provide a cytology brush for an endoscope which can be manufactured by simple processing.

[0006]

To achieve the above object, a cytodiagnosis brush for an endoscope according to the present invention is formed by sandwiching a large number of brush hairs between two twisted hard wires. In the endoscope cytology brush described above, at least one of the hard wires is formed by applying a soft synthetic resin coating to the surface of a hard wire.

The strand of the hard wire may be a single stainless steel wire, and the synthetic resin used for the coating may be a urethane resin or a polyamide resin. The brush bristles may be fixed to the hard wires.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a distal end portion of an endoscope cytology brush inserted into and removed from a treatment tool insertion channel of an endoscope (not shown).

A large number of brush bristles 2 are sandwiched between the twisted portions of two twisted hard wires 1,
The hard wire 1 is connected to a distal end of the operation wire 3 via a connection pipe 4. As the bristles 2, for example, a polyamide resin wire is used.

[0010] The operation wire 3 may be configured so as to be inserted into a sheath 5 made of a flexible tube or the like so as to be able to advance and retreat in the axial direction, or may be configured without the sheath 5.
Also, the two hard wires 1 are, as shown in FIG.
One material may be turned 180 ° to form two wires, or two completely independent hard wires 1 may be used.

FIG. 3 shows a state in which only one of the bristles 2 is sandwiched between the two hard wires 1, and the other many bristles 2 are shown in FIG. Has been omitted.

The two hard wires 1 are formed on the entire outer surface of a hard wire 1a made of, for example, a single stainless steel wire.
For example, it is formed by coating a soft synthetic resin material such as a urethane resin or a polyamide resin.

As a result, as shown in FIG. 1 showing a cross section perpendicular to the axis of one bristle 2,
Of the coating 1b is elastically deformed by pressing the brush bristles 2.

Therefore, the brush bristles 2 are pressed and fixed uniformly and uniformly from the two hard wires 1 by a uniform force, so that not only the brush bristles 2 are not damaged by the pressing force, but also the hard bristles 2 are hardened. Even when the twist of 1 is slightly loosened, the pressing force against the brush bristles 2 does not decrease significantly, so that the brush bristles 2 do not fall off. Further, since the frictional resistance is large between the plastics, the brush bristles 2 can be prevented from falling off.

By heating the brush bristles 2 sandwiched between the two hard wires 1 to weld the brush bristles 2 and the coating 1b, the brush bristles 2 can be more reliably prevented from falling off. Can be. The same effect can be obtained by means such as adhesion instead of heating.

The present invention is not limited to the above embodiment. For example, the coating 1b may be applied to at least one of the two hard wires 1.

[0017]

According to the present invention, at least one of the two twisted hard wires is formed by applying a soft synthetic resin coating to the surface of the hard wire, so that the brush bristles are formed. The two hard wires are pressed and fixed evenly and evenly with a uniform force, and not only does the brush bristle not be damaged by the pressing force, but even if the hard wire twists slightly, The brush hairs do not fall off because the pressure does not drop significantly. Moreover,
Such a cytology brush for an endoscope can be manufactured by a simple process, and a quality that does not deteriorate even when sterilized by an autoclave or the like can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a cytodiagnosis brush for an endoscope according to an embodiment of the present invention in a cross-section perpendicular to the axis of one bristle.

FIG. 2 is a side view of a distal end portion of the endoscope cytology brush according to the embodiment of the present invention.

FIG. 3 is a partial cross-sectional view of a cytology brush for an endoscope according to an embodiment of the present invention in a state where only one bristle is sandwiched between two hard wires.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hard wire 1a Element wire 1b Coating 2 Brush hair

Claims (4)

[Claims] An endoscope cytology brush formed by sandwiching a large number of brush hairs between two twisted hard wires, wherein at least one of the hard wires is formed of a hard strand. A cytodiagnosis brush for an endoscope, the surface of which is formed by applying a soft synthetic resin coating. 2. The endoscope cytodiagnosis brush according to claim 1, wherein the strand of the hard wire is a single stainless steel wire. 3. The synthetic resin used for the coating is a urethane resin or a polyamide resin.
Or the cytology brush for endoscope according to 2 above. 4. The endoscope cytology brush according to claim 1, wherein the brush bristles are fixed to the hard wire.