JPH05142A - Tissue sampler - Google Patents

Abstract

PURPOSE:To eliminate the retention of a tissue sampling part in a body cavity even when a connecting part breaks between a bending part at the tip of a tube body for insertion and the tissue sampling part by providing the tissue sampling part integral at the tip of an operating wire. CONSTITUTION:A tissue sampling device is provided with an operating wire 8 to be inserted into a tube body 2 for insertion. A tissue sampling part 10 such as brush is mounted integral at the tip of the operating wire 8 to sample a vital tissue such as body cavity internal wall of a human body. For example, in the manufacture of the operating wire 8, furs 11 of the brush forming the tissue sampling part are inserted between a plurality of strands which form the tip of the operating wire 8 to integrate the tissue sampling part 10 and the operating part 8. Thus. the tissue sampling part can be wiped out outside the body cavity together with the operating wire when a connecting part breaks between a bending part at the tip of the tube body for insertion and the tissue sampling part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tissue collecting device which is inserted into a body cavity to collect living tissue such as the inner wall of the body cavity.

[0002]

2. Description of the Related Art Generally, there is known a tissue sampling device which is inserted into a body cavity of a human body to sample a living tissue such as an inner wall of the body cavity. As a tissue collecting device of this type, there has been known a device in which a tissue collecting tool is replaceably mounted on an insertion tube as disclosed in, for example, Japanese Utility Model Publication No. 56-10329.

In this case, a proximal operating portion is connected to the proximal end portion of the insertion tube, and a tubular holding portion for detachably holding the tissue sampling tool is attached to the distal end portion of the insertion tube. It is flexibly connected to the body side of the insertion tube.

Further, the tissue collecting tool is provided with an operation wire to be inserted into the main body of the insertion tube, and the tip of the operation wire is a brush such as a brush for collecting living tissue such as an inner wall of a human body cavity. Tissue sampling members are connected. The tissue collecting member is provided with a distal end side connecting portion that is detachably connected to the tubular holding portion of the insertion tube. Further, the proximal end portion of the operation wire of the tissue sampling tool is provided with a proximal end side connecting portion that is detachably connected to the proximal side operating portion of the insertion tube.

When the tissue sampling device is used, the operation wire of the tissue sampling tool is inserted into the insertion tube, and the proximal end connecting portion of the operation wire and the insertion tube are inserted into the proximal operation portion of the insertion tube. The distal end side connecting parts of the tissue collecting member are set to be connected to the tubular holding part. In this state, by operating the proximal side operation section of the insertion tube, the operation wire is pulled in the axial direction, and along with the operation of pulling the operation wire, the tubular section of the insertion tube is inserted through the tissue sampling member. The holding portion is bent substantially at right angles to the main body side of the insertion tube to adjust the direction of the tissue sampling portion.

[0006]

In the conventional tissue sampling device, the operation wire of the tissue sampling tool and the tissue sampling member are separately manufactured, and these are joined and integrated by appropriate joining means. It was Therefore, the production of the tissue sampling tool becomes troublesome, and it takes time to produce the tissue sampling tool and there is a problem that the cost becomes high.

In addition, for example, during the work of collecting living tissue such as the inner wall of a body cavity in a body cavity, for example, the tensile force of the operation wire becomes large, and the joint between the operation wire and the tissue collection member of the tissue sampling tool is damaged. Only the operation wire connected to the proximal side operation part of the insertion tube is pulled out to the proximal side, and the tissue sampling member of the tissue sampling tool remains in the state that it is held in the tubular holding part at the tip of the insertion tube. There was a risk that Therefore, in this case, for example, when the insertion tube is pulled out from the body cavity, the tissue sampling member of the tissue collection tool may fall off the tubular holding portion at the tip of the insertion tube and remain in the body cavity. ..

The present invention has been made in view of the above circumstances, is easy to manufacture, is advantageous in reducing the cost, and is a connecting portion between the curved portion at the distal end of the insertion tube and the tissue sampling portion. It is an object of the present invention to provide a tissue sampling device capable of preventing the tissue sampling part from remaining in the body cavity even when the tissue is damaged.

[0009]

According to the present invention, a curved portion is provided at a distal end portion of an insertion tube whose base end portion is connected to a proximal side operation portion, and a tissue sampling portion can be attached to and detached from the distal end of the curved portion. , The one end is detachably connected to the proximal side operation part, and the other end is connected to the tissue collecting part side, and the bending part is bent along with the advancing / retreating operation of the operation wire, and the tissue collecting part In the tissue sampling apparatus in which the direction is adjusted, the tissue sampling section is integrally provided at the tip of the operation wire.

[0010]

In the above structure, the tissue collecting portion is integrally provided at the distal end portion of the operation wire, so that the troublesome work of separately manufacturing the operation wire and the tissue collecting portion and then joining them can be omitted, and the operation wire can be inserted. When the connecting part between the curved part at the tip of the tube and the tissue sampling part is damaged, the tissue sampling part together with the operation wire can be pulled out to the proximal side when pulling out the insertion tube from the body cavity. It is the one.

[0011]

1 to 4 show a first embodiment of the present invention.

FIG. 1 shows a schematic structure of a main part of the tissue sampling apparatus 1 shown in FIG. The tissue sampling device 1 includes, for example, an insertion tube body 2 formed in a tubular shape by a close-wound coil.
And a tissue sampling tool A that is replaceably attached to the insertion tube 2. The proximal end portion of the insertion tube body 2 is connected to the proximal side operation portion 3.

A curved portion 4 is provided at the tip of the insertion tube 2.
Is provided. As shown in FIG. 1, the bending portion 4 is provided with first to third bending portion constituting bodies 5a to 5c. In this case, the base end portion of the first bending portion constituting body 5a is fixed while being fitted onto the tip end portion of the insertion tube body 2.
Further, the base end portion of the second bending portion constituting body 5b is rotatably connected to the tip end portion of the first bending portion constituting body 5a via a connecting pin 6a, and similarly, the third bending portion constituting body 5c. The base end part of is rotatably connected to the tip end part of the second bending part constituting body 5b through a connecting pin 6b.

Further, a tubular socket portion 7 for holding the tissue sampling tool A is provided on the third bending portion constituting body 5c. At the tip of the socket portion 7, there is formed an inwardly projecting protrusion portion 7a for preventing slip-off.

On the other hand, the tissue sampling tool A is provided with an operation wire 8 to be inserted into the insertion tube body 2 as shown in FIG. A tissue collecting section 10 such as a brush for collecting living tissue such as an inner wall of a body cavity of a human body is integrally provided at a distal end portion of the operation wire 8. For example, when manufacturing the operating wire 8, the bristles 11 of the brush forming the tissue collecting section 10 are inserted between a plurality of twisted wires forming the distal end of the operating wire 8, and the tissue collecting section 10 and the operating wire 8 are separated from each other. It is molded integrally.

A fixed tube 9 is fixed to the rear end portion of the tissue sampling portion 10 of the operation wire 8 of the tissue sampling tool A. This fixed tube 9 is the socket portion 7 of the insertion tube body 2.
And a distal end side connecting portion that is detachably connected to the. Further, a proximal end portion of the operation wire 8 of the tissue collecting tool A is provided with a proximal end coupling portion (not shown) that is detachably coupled to the proximal manipulation portion 3 of the insertion tube body 2.

Further, as shown in FIG. 2, the hand-held portion 1 fixed to the operating portion main body 3 is provided on the proximal operating portion 3 of the insertion tube body 2.
2 is formed. The handgrip 12 is provided with a pair of collars 13 and 14 that are spaced apart and face each other.

Further, a slide member 15 which is slidable in the axial direction of the insertion tube body 2 is mounted on the operation section body 3. A ring-shaped receiving portion 16 for inserting fingers and the like is formed at the base end portion of the slide member 15, and the base end portion of the operation wire 8 can be detachably attached to the tip end portion of the slide member 15. A connecting portion (not shown) for connecting is provided.

Then, when the tissue sampling device 1 is used, the operation wire 8 of the tissue sampling tool A is inserted into the insertion tube 2, and the distal end portion of the slide member 15 of the proximal side operation section 3 of the insertion tube 2 is inserted. The fixed tube 9 of the tissue sampling tool A is set to be connected to the proximal end side connecting portion of the operation wire 8 and the socket portion 7 of the insertion tube body 2, respectively. In this case, in the state where the slide member 15 of the proximal side operation portion 3 is held in a normal fixed position, the bending portion 4 of the insertion tube body 2 is held in a substantially straight state where it is not bent as shown in FIG. It is supposed to be done.

Further, the slide member 15 of the hand side operating section 3
By pulling from the fixed position, the operation wire 8
Is pulled in the axial direction, and the socket portion 7 of the insertion tube 2 is pulled through the fixed tube 9 of the tissue sampling tool A along with the pulling operation of the operation wire 8 to bend the insertion tube 2. The section 4 is bent as shown in FIG. 4 to adjust the direction of the tissue sampling section 10.

Therefore, in the above-mentioned structure, since the tissue sampling section 10 is integrally provided at the distal end of the operation wire 8,
It is possible to omit the troublesome work of separately manufacturing the operation wire 8 and the tissue sampling unit 10 and then joining them as in the conventional case. Therefore, the production of the tissue sampling tool A can be facilitated, and the cost can be reduced.

Further, when the connecting portion between the curved portion 4 at the tip of the insertion tube 2 and the tissue sampling section 10 is damaged, the tissue sampling section 10 is operated by the operation wire when the insertion tube 2 is pulled out from the body cavity. Since it can be integrally withdrawn toward the proximal side together with 8, even if the connecting portion between the curved portion 4 at the tip of the insertion tube 2 and the tissue sampling portion 10 is damaged, the tissue sampling portion 10 can be removed as in the conventional case. It can be prevented from remaining in the body cavity.

FIG. 5 shows a second embodiment of the present invention.

This is done by forming a collecting wire 21 in which wire materials, which are wire materials, are formed by combining them with a relatively large diameter, and then unwinding the portion of the collecting wire 21 excluding the distal end side portion. The part other than the side part is formed on the operation wire 22 having a smaller diameter than the tip side part.

The tip side portion of the sampling wire 21 is folded back, and the terminal portion of this folding back is inserted and fixed in the fixed tube 23. A tissue collecting portion 24 such as a brush is integrally provided at the folded portion of the collecting portion wire 21. Similar to the first embodiment, the tissue collecting portion 24 is, for example, a bristle 25 of a brush that forms the tissue collecting portion 24 between a plurality of strands forming the tip of the collecting portion wire 21 when the collecting portion wire 21 is manufactured. ... is inserted, and the tissue collecting section 24 and the collecting section wire 21 are integrally formed.

Therefore, even with the above-mentioned structure, the same effects as those of the first embodiment can be obtained, and in the case of the above-mentioned structure, the bristles 25 of the brush forming the tissue sampling portion 24 are particularly inserted. Not only can it be directed only in the circumferential direction substantially orthogonal to the axial center direction of the insertion tube 2, but it can also be directed in the axial direction of the insertion tube 2. Therefore, not only the biological tissue in the circumferential direction of the tissue sampling unit 24 but also the biological tissue in front of the tissue sampling unit 24 can be sampled.

Further, since the tip end side portion of the collecting portion wire 21 is folded back and the terminal portion of this folding back is inserted into the fixed tube 23 and fixed, the amount of the bristles 25 of the brush forming the tissue collecting portion 24 is reduced. It is possible to increase the work efficiency of the tissue collection work.

The present invention is not limited to the above embodiments. For example, the bending portion 4 of the insertion tube body 2 may be one having one connecting pin or multi-joint having three or more connecting pins. Further, other various modifications can be considered without departing from the scope of the present invention.

[0029]

According to the present invention, since the tissue sampling portion is integrally provided on the distal end portion of the operation wire, it is easy to manufacture, and it is advantageous in reducing the cost, and the bending of the distal end of the insertion tube is achieved. It is possible to prevent the tissue collecting section from remaining in the body cavity even if the connecting section between the section and the tissue collecting section is damaged.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a schematic configuration of a main part of a first embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of the entire tissue sampling device.

FIG. 3 is a vertical cross-sectional view of a main part showing a tissue sampling part at the tip of an operation wire.

FIG. 4 is a vertical cross-sectional view of a main portion showing a state in which a bending portion is operated to bend.

FIG. 5 is a vertical cross-sectional view of a main part showing a second embodiment of the present invention.

[Explanation of symbols]

2 ... Insertion tube body, 3 ... Hand side operation section, 4 ... Bending section, 8,
22 ... Operation wire, 10, 24 ... Tissue sampling section.

[Procedure amendment]

[Submission date] May 23, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction content]

[0024] This is, after forming the collecting part wire 21 which has made the form to match the relatively large diameter of the wire is a wire material, the tip to loosen the portion excluding the tip portion of the sampling unit wire 21 The part other than the part side part is formed on the operation wire 22 having a smaller diameter than the tip part side part.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Koichi Kawashima 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Yoshio Onuki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Kenichiro Maki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Masaaki Hayashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

Claims: 1. A bending portion is provided at a distal end portion of an insertion tube body whose proximal end portion is connected to a proximal side operation portion, and a tissue sampling portion is detachably attached to a distal end of the bending portion. While being connected, one end is detachably connected to the proximal side operation unit, and the other end is connected to the tissue collecting unit side. With the advancing and retracting operation of the operation wire, the bending portion is operated to bend and the tissue collecting unit A tissue sampling device in which the direction is adjusted, wherein the tissue sampling part is integrally provided at the distal end portion of the operation wire.