JP2002159503A - Foreign matter recovering tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently and certainly recover foreign matters from the inside of the coelom without leaving the foreign matters in the coelom. SOLUTION: This foreign matter recovering tool 1 is a medical instrument for collecting the foreign matters from the inside of the coelom via an endscope. A basket 9 formed of flexible wires 8 is disposed in a range from sheath tube 5 to the tip. The tip part of the basket 9 is partially provided with a net 11 for holding the recovered foreign matters, and the tip of the basket 9 has a basket tip 10 for tying at least three or more flexible wires.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign matter collecting tool for collecting foreign matter in a body cavity through an endoscope.

[0002]

2. Description of the Related Art A foreign object collecting device generally comprises an operating wire and a plurality of flexible wires attached to the tip of the operating wire, and a basket formed in a birdcage-like shape is provided for protecting the operating wire. It consists of a flexible sheath and an operating means attached to the proximal end of the operating wire.

[0003] First, in order to expand and contract the basket, the operating wire is moved in and out of the sheath tube by moving the operating means back and forth in the longitudinal direction of the operating wire. As a result, the basket at the tip of the operation wire also enters and exits from the sheath tube tip. When the basket is extruded from the sheath tube, the basket is made of a flexible wire,
When the basket is retracted into the sheath tube by self-expansion, and the basket is pulled into the sheath tube, the entire flexible wire constituting the basket is contracted so as to be stretched and becomes a single wire. Is stored inside.

When the basket is expanded, foreign matter in the body cavity is taken into the basket, the basket is contracted, and this operation is repeated to collect foreign matter from the body cavity.

However, it is difficult to take in foreign matter into the basket in the case of a birdcage formed only of the flexible wires constituting the basket. That is, when the number of flexible wires constituting the basket is large, the interval between adjacent wires and wires is narrower than when the number of flexible wires constituting the wire is smaller than the above case,
Small foreign matter can be collected in the basket, but if the foreign matter is larger than the distance between adjacent wires, it is very difficult to take the foreign matter into the basket. In such a case, a part of the basket that has been uniformly expanded into the body cavity is further pressed into the body cavity, and by deforming the shape of the basket, the distance between adjacent wires is increased, so that foreign objects are taken into the basket. It is not only a difficult operation for the operator, but also
There was a problem of injuring the body cavity.

Conversely, if the number of flexible wires constituting the basket is made smaller than in the above case, the distance between the wires becomes wider than the distance between the adjacent wires. In this case, even a large foreign matter can be smoothly placed in the basket. Although the foreign matter extremely smaller than the wire interval can be taken into the basket, when the basket is stored in the sheath tube, the wire interval is wide when the basket is in a contracted state. For this reason, small foreign matter falls off the wire at the tip of the basket, and it has been difficult to efficiently and reliably collect foreign matter.

In the case where foreign matter is large in a body cavity and it is difficult to collect the foreign matter in a basket, a method of mechanically crushing the foreign matter and finely crushing the foreign matter to a size that can be collected in a basket has been adopted. However, as described above, it is difficult to collect all the finely crushed foreign matter, and if the foreign matter is left in the body cavity, it becomes a large foreign matter and recurs.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve such a problem, and a foreign matter collecting tool for efficiently and surely collecting foreign matter to be collected from a body cavity without leaving the body in the body cavity. It is about.

[0009]

That is, the present invention relates to a sheath tube, an operation wire inserted in the sheath tube, an operation means for operating the operation wire, and a flexible wire attached to the distal end of the operation wire. A medical device comprising a basket consisting of at least three flexible wires, and a net partially attached to the basket. Tool.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the entirety of the foreign matter collection tool according to one embodiment of the present invention, and FIG. 2 shows a basket located at the tip of the foreign matter collection tool according to one embodiment of the present invention and a net attached to the tip of the basket. FIG.
FIG. 1 shows a state in which foreign matter is collected in a basket by the foreign matter collection tool according to one embodiment of the present invention.

First, in FIG. 1, a foreign substance collecting tool (1) has a function of collecting foreign substances from the inside of a body cavity through an endoscope. The foreign substance collecting tool (1) is used when a contrast agent or the like is injected. The cap (2) attached can be removed for injection. An operation handle (12) for moving the basket (9) back and forth in the longitudinal direction of the operation wire (4) and allowing the operation wire (4) to freely rotate 360 degrees is provided at the base end side of the foreign matter collection tool (1). Have been.

At the base end, a connector (3) for inserting the basket (9) into the sheath tube (5).
And a reinforcing portion (6) for preventing the connection portion between the sheath tube (5) and the connector portion (3) from being bent. A sheath tube (5) for protecting the operation wire (3) is provided on the distal end side from the reinforcing portion (6), and a contrast ring (7) is attached to the distal end thereof so that it can be confirmed even under X-ray fluoroscopy. I have.

An operation wire (4) for operating the basket (9) is provided on the distal end side from the sheath tube (5), and a basket (9) composed of a flexible wire (8) is provided on the distal end. I have. A net (11) for holding the collected foreign matter is attached to the tip of the basket (9), and a basket tip for binding the flexible wire (8) to the tip of the basket (9). (1
0) is provided.

In the foreign matter collecting tool (1) of the present invention, first, the basket (9) attached to the tip of the operation wire (4) is inserted from the connector (3), and further passes through the sheath tube (5). By moving the operation handle (12) attached to the base end of the operation wire (4) back and forth in the longitudinal direction of the operation wire (4), the basket (9) is pushed out from the distal end of the sheath tube (5). Then, since the flexible wire (8) constituting the basket (9) is formed into a birdcage shape by performing a bending process or the like, the flexible wire (8) expands uniformly in the body cavity. Here, the distal end of the sheath tube (5) is set in advance so as to be located at a place where the foreign matter to be collected passes.

The basket (9) extruded from the distal end of the sheath tube (5) expands, and draws the basket (9) toward the foreign substance and takes it into the basket (9).
At this time, if foreign matter is difficult to take in, the operation handle (1
2) Rotate and take in. After the storage, the basket (9) is pulled into the sheath tube (5). As shown in FIG. 2, a net (11) attached to the tip of the basket (9) is provided so that even a small foreign substance can be used as the flexible wire (8). It is possible to recover without falling off.

When there are many small foreign substances, the operation handle (12) can be pulled forward with the basket (9) expanded, so that the foreign substances (13) taken into the basket (9) as shown in FIG. Can be caught by the net (11) attached to the tip of the basket (9), and a large number of small foreign substances can be collected in the basket (9) by one operation.

As described above, the flexible wire (8) is a flexible metal wire that expands in the body cavity, and can retain its shape by bending or heat treatment. Are preferred, and stainless steel and nickel titanium alloy are preferred, but not limited to these.
The operation wire (4) for attaching the basket (9)
It is preferable to use a material having flexibility that is difficult to bend, and to twist the flexible wire (8) so that the movement of the operation handle (12) is quickly transmitted to the basket (9). The same material as that of the flexible wire (8) constituting 9) is preferable, but the material is not limited to these as long as it is difficult to bend and has flexibility.
Furthermore, the shape, size, number and diameter of the basket (8) may be determined by combining the number and diameter of the flexible wires (8) according to the inserted body cavity and the size of the foreign matter to be collected. Absent.

Next, the sheath tube (5) must have at least the same flexibility as the operation wire (4). Further, since the basket (9) and the operation wire (4) pass through from the proximal end to the distal end of the sheath tube (5), and the sheath tube (5) passes through the forceps port of the endoscope, a material having good slip is preferable.
Synthetic resin such as polytetrafluoroethylene (PTFE) resin, polyethylene terephthalate (PTF) resin, polyethylene (PE) resin, polypropylene resin (PP), polyvinyl chloride resin (PVC) or the above-mentioned resin for further rigidity It is preferable to use a composite of a metal coil and a metal mesh.

An X-ray opaque contrast ring (7) is attached to the end of the sheath tube (5) so that the position of the end can be confirmed even under X-ray fluoroscopy. The material is platinum, gold, tungsten, titanium, stainless steel, or the like. Is preferred, but X
The material is not limited as long as it can be confirmed under fluoroscopy. The length is preferably 3 to 6 mm, but if it is smaller than this, it will be difficult to confirm. If it is larger than this, the contrast ring (7) will be caught when passing through the portion of the endoscope that raises the forceps table. This leads to breakage of the sheath tube (5) and the endoscope.

With respect to the net (11) attached to the tip of the basket (9), fixing to the basket (9) is performed by connecting one flexible wire (8) constituting the basket (9) to a continuous mesh portion. ) Are alternately inserted, and the end portion of the mesh is fixed to the flexible wire (8) with an adhesive or a thread. As for the fixing position, it is preferable to fix at a position between the position where the opening width when the basket (9) is expanded to the maximum and the tip of the basket (9) is large. There is no limitation as long as it is a position that does not hinder the collection.

Further, the material is preferably a polyester resin fiber, a nylon resin fiber, an aromatic polyamide fiber or the like, and the diameter of the yarn of the net (11) is preferably 40 to 40 in consideration of taking in and out of the sheath tube (5). 100
Those of the order of microns are preferred. Although it is the mesh of the net (11), it may be determined according to the minimum size of the foreign matter to be collected. If it is 5 mm, the width of the mesh is preferably 3 mm or less. The net (11) may be a fibrous material that is meshed so as to provide nodes, a fiber formed by crossing fibers and welding the intersections at a high frequency, or a sheet-like material cut with a laser or pressed. A method of opening a window by punching with a nozzle to form a net (11) or the like is generally used.

[0022]

As described above, the foreign matter collecting device according to the present invention can efficiently and reliably collect foreign matter in a body cavity without leaving any foreign matter in the body cavity.

[Brief description of the drawings]

FIG. 1 is a view showing a foreign matter collecting tool according to one embodiment of the present invention.

FIG. 2 is an enlarged view of a net attached to a tip of a basket of the foreign matter collecting tool according to one embodiment of the present invention.

FIG. 3 is a diagram showing a foreign object collecting tool according to one embodiment of the present invention, which collects foreign objects with a net attached to the tip of a basket.

[Description of Signs] 1 Foreign matter collection tool 2 Cap 3 Connector part 4 Operation wire 5 Sheath tube 6 Reinforcement part 7 Imaging ring 8 Flexible wire 9 Basket 10 Basket tip 11 Net 12 Operation handle 13 Foreign matter

Claims (1)

[Claims] 1. A medical system comprising: a sheath tube; an operation wire inserted into the sheath tube; operation means for operating the operation wire; and a basket attached to a distal end of the operation wire and formed of a flexible wire. What is claimed is: 1. A foreign matter collecting tool, wherein the basket is formed of at least three or more flexible wires, and a net is partially attached to the basket.