JPS6025229Y2 - Intrabody cavity foreign body removal tool - Google Patents

Description

[Detailed description of the invention] This invention allows bile duct stones to be removed through the insertion channel of an endoscope.
The present invention relates to an intrabody cavity foreign body extraction tool used to remove foreign bodies such as ureteral stones.

As a method for removing impounded stones such as common bile duct stones, intraductal stones, and ureteral stones formed in the body cavity, a foreign body removal tool is inserted into the insertion channel of an endoscope that is inserted into the body cavity near the lumen where the bile duct stone is located. and insert the foreign body removal tool into the lumen of the biliary tract, urethra, etc. where the stone is located under observation with the endoscope, and while confirming the location of the stone using X-ray fluoroscopic observation. A method of extraction is used.

As shown in FIG. 1, the intrabody cavity foreign body dispensing tool used for removing foreign bodies such as stones is composed of a flexible sheath 1 that can be inserted into an insertion channel of an endoscope, and a visible sheath 1 that can be inserted into an insertion channel of an endoscope. It is separated from the operating member inserted therein.

As the visibility sheath 1, a long flexible tube such as a closely coiled tube or a plastic tube is used.

The operating members include an operating wire 2 and a plurality of elastic wires 3 provided at the tips thereof. ....

3, the plurality of elastic wires 3. The elastic wires 3, . . . , 3 have their front ends bound together by a binding metal fitting 4, and their rear ends bound and fixed to the tip of the operating wire 2 by a connecting metal fitting 5, and the elastic wires 3, . When protruded from the visible sheath 1 in the body cavity, each elastic wire 3 curves due to the elasticity of each elastic wire 3, expands into a knot shape, and expands.

In the above foreign body extraction tool, the elastic wire 3. . . , 3 is expanded into a knot shape, and in that state, the elastic wire 3 . ..., 3 protrudes, the elastic wire 3 comes into contact with the foreign object and deforms in the circumferential direction of the extraction tool, but if it still protrudes, the elastic wire 3..., 3 stops making contact with the foreign object. Lost and restored, operating wire again3. ..., 3 expands into a knot shape to surround and contain foreign matter.

In this state, the operating wire 2 is pulled and the elastic wire 3 is expanded into a knot shape. . . , 3 into the flexible sheath 1. ..., 3 grips the foreign object such as a stone, and removes the foreign object from the body cavity as the endoscope is pulled out.

At this time, if the elastic wire 3 has strong elasticity, even if the elastic wire 3 comes into contact with a foreign object, it may not deform and may push the foreign object deeper.

In addition, when the foreign object to be removed is small, the elastic wire 3 is difficult to deform according to the shape of the foreign object.
．． ..., 3 makes it difficult to grasp the foreign object, and even if the foreign object is successfully grasped, the foreign object may fall off from the extraction tool when the endoscope is pulled out.

On the other hand, when the elasticity of the elastic wire 3 is weak, the elastic wire 3.・・・
・, 3 is deformed in the axial direction of the extraction tool, and the binding fitting 4
It may become impossible to make it stick out any further.

Another method for holding a foreign object in the extraction tool is to use an elastic wire 3.
．． . . , 3 is stored, the flexible sheath 1 is inserted just before the foreign object, and at that position, the elastic wire 3 . ...,
3 protrudes, and the elastic wire 3. ....

3 expands, the foreign object is removed from the elastic wire 3. ..., there is a way to accommodate it within 3.

Even in this case, when the elasticity of the elastic wire 3 is strong, the force of expanding into knots is strong, so the elastic wire 3. It is easy to surround the foreign object with the elastic wire 3. However, if the foreign object is small, it is difficult to grasp it because it is difficult to deform to fit the foreign object. ..., 3, when the elastic wire 3°..., 3 is attached to the foreign object, the elastic wire 3°..., 3
The foreign object is deformed and the force that causes it to spread into knots is weak, so the foreign object is removed using an elastic wire 3. ..., difficult to surround by 3.

The present invention was made in order to solve the above-mentioned problems, and provides a device for dispensing foreign bodies in body cavities, which can easily accommodate foreign bodies such as stones regardless of their size, and which makes it difficult for the accommodated foreign bodies to fall out. The purpose is to

Hereinafter, the present invention will be described in detail according to preferred embodiments shown in the accompanying drawings.

In the embodiment shown in FIGS. 2 and 3, the intrabody cavity foreign body dispensing tool includes a flexible sheath 1 that can be inserted into an insertion channel of an endoscope, and an operating member that is inserted into the flexible sheath 1. I am admonishing you.

As the flexible sheath 1, a long flexible tube such as a closely coiled tube or a plastic tube is used.

The operating members include the operating wire 2, two elastic wires 3a, 3a with strong elasticity, and two elastic wires 3b, 3b with weak elasticity (represented by thin lines in the figure for convenience) provided at the tips of the operating wire 2. The plurality of elastic wires 3a,
3a, 3b, and 3b, the wires 3a, 3b, and 3b have a strong elasticity and a wire 3b with low elasticity, which are alternately tied together with their front ends tied to a binding metal fitting 4, and their rear ends are connected to the tip of the operating wire 2 by a binding metal fitting 5. When the elastic wires 3a, 3a, 3b, and 3b are bound and fixed and are protruded from the flexible sheath 1 in the body cavity, they are each curved into a knot shape due to the elasticity of each of the elastic wires 3a, 3b. It swells and expands.

In the embodiment shown in FIGS. 2 and 3, there are four elastic wires, but the number of elastic wires is not limited to four; for example, as in the embodiment shown in FIG. 4, there are three elastic wires. Elastic wires 3a, 3a, 3a with strong elasticity and three elastic wires 3b with weak elasticity.

It is also possible to alternately arrange 3b and 3b.

Hereinafter, the case where a foreign body such as a stone is removed using the intrabody cavity foreign body dispensing tool according to the present invention will be explained using the removal of a common bile duct stone shown in FIG. 5 as an example.

First, the foreign body removal tool is inserted into the endoscope 7 inserted into the duodenum 6, and the foreign body removal tool is inserted into the common bile duct C under observation using the endoscope 7.

Flexible sheath 1 and operating wire 2 of the inserted foreign body extraction tool
A contrast medium is injected into the common bile duct C using the gap between the stones and the stone S, and the position of the stone S is confirmed using X-ray fluoroscopy.

Next, in front of the calculus S, elastic wires 3a, 3a, 3b, 3
b protrudes from the flexible sheath 1, and the elastic wire 3a,
Each elastic wire 3a, 3b1 is expanded into a knot shape due to the inherent elasticity of the wire 3b.

In that state, the elastic wires 3a, 3av 3b, 3
When b is protruded, the elastic wires 3a, 3a, 3b, 3b come into contact with the calculus S, deform in the circumferential direction of the extraction tool, lose contact with the calculus S, and then expand into a knot again to surround and contain the calculus S. .

After that, the operating wire 2 is pulled and the elastic wire 3at
By pulling 3a, 3b, 3b into the flexible sheath 1, the elastic wires 3a, 3at 3bt 3b extract the stone S from the body cavity.

According to the foreign body extraction device according to the present invention, in the above-mentioned extraction operation, the binding fitting 4 or the elastic wire 3 pushes the foreign object such as a stone deeper into the lumen to be extracted, unlike conventional extraction tools. The elastic wire 3, which has weak elasticity, can be used to remove foreign objects such as stones that are loose in the lumen and which are difficult to remove.
Since b deforms in accordance with the foreign object, the foreign object is not pushed deep into the lumen, and when the extraction tool is protruded, the foreign object spreads into a knot-shaped elastic wire 3a* 3a* 3b, 3.
It is accommodated within b.

Further, even when the foreign object to be extracted is small, the elastic wire 3b having weak elasticity deforms according to the shape of the foreign object, and can easily and reliably grip the foreign object.

Even when an extraction method is adopted in which the elastic wire is expanded into knots around the foreign object, the elastic wire 3a with strong elasticity is reliably expanded.
It can be accommodated in bt 3b.

In addition, while the conventional extracting tool can only accommodate foreign objects up to the distance between adjacent elastic wires 3.3, the extracting tool according to the present invention has an elastic wire 3a with strong elasticity and an elastic wire 3b with weak elasticity. Since the elastic wires 3b with weak elasticity are arranged alternately, the elastic wires 3b, which have weak elasticity, do not deform and prevent the passage of foreign objects.
It is possible to accommodate foreign matter up to the distance between the highly elastic elastic wires 3a, 3a, and it is possible to accommodate larger foreign matter compared to conventional products.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal side view showing a conventional body cavity foreign body dispensing device, FIG. 2 is a partially longitudinal side view showing an embodiment of the body cavity foreign body dispensing device according to the present invention, and FIG. 3 is an implementation of the same. Front view showing an example,
FIG. 4 is a front view showing another embodiment, and FIG. 5 is a diagram showing removal of a common bile duct stone according to the embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Flexible sheath, 2...Operation wire, 3...Elastic wire, 3a...Strongly elastic elastic wire, 3b... ... Elastic wire with weak elasticity, 4... Binding fittings, 5... Binding fittings.

Claims (1)

[Scope of Utility Model Registration Claim] A flexible sheath that can be inserted into an insertion channel of an endoscope, the distal ends of a plurality of elastic wires are tied together with a binding fitting, and then the terminals are tied with the tip of an operating wire using a connecting fitting. In the intrabody cavity foreign body dispensing device, the elastic wires are alternately arranged such that elastic wires have strong elasticity and elastic wires have weak elasticity. A device for dispensing a foreign body in a body cavity.