JPH08299345A - Cytodiagnosis brush with cover for endoscope - Google Patents

Abstract

PURPOSE: To extract a lot of cells by forming a plurality of slits longer than the axial length of a brush bristle part into notched shapes in the tip of a flexible tube forming an outer casing tube. CONSTITUTION: An outer casing tube is formed from, for example, a flexible tube having elasticity such as a fluorplastic tube and an operation wire 1 is inserted so as to freely advance/retreat. A slit 6 is notchedly formed from the tip side in the tip part of the outer casing tube 5 and the tip part of the outer casing tube 5 is axially divided, for example, into four. The respective slits 6 are formed longer than the length of a brush bristle 2 part. The brush bristle 2 part which is made to project from the tip of the outer casing tube 5 is moved by remote control of a wire 1 so that a cell is collected from the mucous membrane 100. While the outer casing tube 5 is widely opened by the brush bristle 2 part, the brush bristle 2 is stored in the outer casing tube 5 and then drawn into a forceps channel by pulling of an outer casing tube 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cytodiagnosis brush with a cover for an endoscope, which is used by passing through a forceps channel of an endoscope to scrape and collect cells in a body cavity.

[0002]

2. Description of the Related Art The cells on the surface of a mucous membrane in a body cavity can be collected by rubbing it with a brush. However, when the bristles are pulled into the forceps channel of an endoscope, the cells attached to the bristles are collected. Will fall.

Therefore, the bristles are arranged so that they can be freely taken in and out from the tip of an outer tube made of a flexible tube, and the bristles are projected from the tip of the outer tube to collect cells, and then the bristles are stored in the outer tube. It is designed to be pulled into the forceps channel. This is the so-called cytology brush with cover.

[0004]

When the mucous membrane is rubbed with brush bristles, cells peeled off from the mucous membrane adhere to the surface of the bristles, and some of the cells are sandwiched between the bristles of the bristles, and some of them are brushed. The hair will rise from the surface.

However, in the case of the above-described brush with a cover, the cells raised from the surface of the brush bristles are squeezed by the mouth of the tube when the bristles enter the flexible tube and fall. , Cannot collect a large amount of cells.

Moreover, since the brush bristles are housed in the tube, the diameter of the brush bristles (that is, the length of the bristles) cannot be longer than the inner diameter of the tube, so that the number of cells sandwiched between the bristles is small. It was very difficult to collect a sufficient amount of cells at one time.

Therefore, an object of the present invention is to provide a cytodiagnosis brush with a cover for an endoscope, which can collect a large amount of cells at one time.

[0008]

In order to achieve the above object, the conduit switching device for an endoscope according to the present invention has at least an operating member having a bristle protruding laterally at a tip portion thereof. An endoscope in which a tip portion is inserted into an outer tube formed by a flexible tube so as to be able to advance and retreat, and the brush bristles are taken in and out from the tip of the outer tube by advancing and retracting the operation member. The cytodiagnosis brush with a cover is characterized in that a plurality of slits having a length longer than the axial length of the brush bristle portion is formed by cutting the flexible tube from the tip side.

The outer diameter of the brush bristle portion may be formed larger than the inner diameter of the tip portion of the flexible tube, and the outer diameter dimension of the rear end portion of the brush bristle portion may be a portion other than the rear end portion. It may be formed thicker.

[0010]

Embodiments will be described with reference to the drawings. Figure 1
The 1st Example of the cytology brush with the cover for endoscopes of this invention is shown, For example, the brush bristles 2 are attached to the front-end | tip part of the flexible operation wire 1 formed by twisting a stainless steel wire. Are projected radially toward the sides. Reference numeral 3 is a spherical tip attached to the tip of the operation wire 1.

The outer tube 5 is formed of an elastic flexible tube such as a fluororesin tube, into which the operation wire 1 is inserted so as to be able to move forward and backward. Therefore, by operating the operation wire 1 from the proximal side of the outer tube 5 to move it back and forth, the portion of the bristles 2 can be moved in the axial direction.

A slit 6 is formed in the tip portion of the outer tube 5 by cutting from the tip side, and the tip portion of the outer tube 5 is divided into four in the axial direction. Each slit 6 is formed longer than the axial length of the brush bristles 2 portion, and is 90 °.
It is provided at four intervals.

And in this embodiment, the brush bristles 2
The outer diameter of the portion (that is, the length of the brush bristles 2) D1 is formed larger than the inner diameter D2 of the tip portion of the outer tube 5. That is, D1> D2.

The thus-constructed cytodiagnosis brush with a cover is used by being inserted into a forceps channel of an endoscope (not shown), and as shown in FIG. The mucous membrane 100 in the body cavity protruding from the tip
, And the cells on the surface of the mucous membrane 100 are collected by the bristles 2 by moving the operation wire 1 in the axial direction by remote control. Some of the cells are sandwiched between the bristles 2 and some of them adhere to the surface of the bristles 2 so as to rise.

Then, as shown in FIG. 2, when the operating wire 1 is pulled toward the hand side, the brush bristles 2 are drawn to the tip mouth of the outer tube 5, and the bristles 2 are drawn into the outer tube 5. And

Then, since the outer diameter of the brush bristles 2 is larger than the inner diameter of the outer tube 5, the tip of the outer tube 5 is the bristles 2.
3 and 4 by pulling the operation wire 1 toward the hand side,
The brush bristles 2 are stored in the tip portion of the outer tube 5. As a result, the tip portion of the mantle tube 5 is in a state in which its mouth is opened like a petal.

Therefore, the cells attached to the portions other than the rear end portion of the brush bristles 2 are not squeezed at the mouth of the outer tube 5, and the bristles 2 are opened inside the tip of the outer tube 5.
Is drawn in with.

Then, when the outer tube 5 itself is pulled toward the proximal side in this state, as shown in FIG. 5, the tip portion of the outer tube 5 moves from the tip 11 of the insertion portion of the endoscope to the forceps channel 12.
Be drawn in.

The tip portion of the mantle tube 5 that has been opened like a petal outside the forceps channel 12 is drawn into the forceps channel 12 to be narrowed to a shape along the inner peripheral surface of the forceps channel 12. Then, the collected cells are accommodated in the outer tube 5 and collected on the hand side in the maximum amount that can fit into the tip portion of the shrouded outer tube 5.

If the forceps channel 12 has a large inner diameter, a larger amount of cells can be collected using the same cytodiagnosis brush with a cover as shown in FIG.
On the contrary, even if the inner diameter of the forceps channel 12 is small, as shown in FIG.
As shown in, the same endoscopic cytology brush with a cover can be used to collect the maximum number of cells corresponding to the channel diameter. Therefore, one type of cytology brush with a cover for an endoscope can be used for various endoscopes having different channel diameters.

FIG. 8 shows a second embodiment of the present invention in which the outer diameter of the brush bristles 2 is formed thicker only at the rear end portion 2a, and the outer diameters of the other portions of the brush bristles 2 are changed to the outer tube. The inner diameter of the tip portion of No. 5 is made smaller. That is, D1 <
D2 <D3.

With this structure, as shown in FIG. 9, the mantle tube 5 is provided in the forceps channel 12.
Rear end portion 2a of the bristle 2 when the tip of the
Is contacted with the inner surface of the outer tube 5 and a gap is secured between the other portion of the brush bristles 2 and the inner surface of the outer tube 5, so that the collected cells can be sufficiently protected.

The present invention is not limited to the above-mentioned embodiment, and other parts may be interposed between the operation wire 1 and the brush bristles 2, for example, and the outer tube 5 has at least the tip portion. Need only be formed of a flexible tube.

The outer tube 5 can be made of various materials such as polyethylene, polyurethane, polyimide and the like. Further, the slit 6 is not limited to dividing the tip portion of the outer tube 5 into four, and may be divided into any number as long as it is divided into a plurality.

[0025]

According to the present invention, a plurality of slits having a length longer than the axial length of the brush bristle portion are formed on the distal end side of the outer tube made of a flexible tube, so that the brush bristles are drawn into the outer tube. At this time, the tip portion of the mantle is opened, and the cells attached around the bristle can be accommodated in the mantle, so that a large amount of cells can be collected at one time.

By making the outer diameter of the bristle portion larger than the inner diameter of the tip of the flexible tube, the tip of the outer tube is similarly opened, and the cells attached around the bristle are accommodated in the outer tube. Therefore, it is possible to collect a larger amount of cells by increasing the outer diameter dimension of the brush bristle portion.

Further, by forming the outer diameter of the rear end portion of the brush bristles to be thicker than the other portions, a gap is secured between the inner surface of the outer tube and the bristles, and the collected cells are sufficiently protected. can do.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment.

FIG. 2 is a side sectional view showing a usage state of the first embodiment.

FIG. 3 is a side sectional view showing a usage state of the first embodiment.

FIG. 4 is a front view showing a usage state of the first embodiment.

FIG. 5 is a side sectional view showing a usage state of the first embodiment.

FIG. 6 is a side sectional view showing a usage state of the first embodiment.

FIG. 7 is a side sectional view showing a usage state of the first embodiment.

FIG. 8 is a side sectional view of a second embodiment.

FIG. 9 is a side sectional view showing a usage state of the second embodiment.

[Explanation of symbols]

 1 Operation wire 2 Brush bristles 5 Mantle tube 6 Slit

Claims (3)

[Claims] 1. An operating member having brush hairs protruding laterally from a tip end portion thereof is inserted into an outer tube having at least a tip end portion formed of a flexible tube so as to be able to move forward and backward, and the operation member is provided. In a cytodiagnosis brush with a cover for an endoscope in which the bristles are moved in and out from the tip of the outer tube by an advancing / retreating operation, a plurality of slits longer than the axial length of the bristles are provided in the flexible tube. A cytodiagnosis brush with a cover for an endoscope, which is formed by cutting a sex tube from the tip side. 2. The cytodiagnosis brush with a cover for an endoscope according to claim 1, wherein an outer diameter of the brush bristle portion is formed to be larger than an inner diameter of a tip portion of the flexible tube. 3. The cytodiagnosis brush with a cover for an endoscope according to claim 1, wherein the outer diameter of the rear end portion of the brush bristle portion is formed thicker than the portion other than the rear end portion.