KR102504942B1 - dual structure balloon catheter - Google Patents

Abstract

It relates to a balloon catheter, wherein the balloon catheter has a dual structure: a conduit unit having a tube shape, a first balloon portion provided through the conduit unit to receive fluid through the conduit unit, and expansion of the first balloon portion It may include a second balloon portion provided to surround the first balloon portion so as to be expandable in conjunction with.

Description

Dual structure balloon catheter

The present application relates to a dual structure balloon catheter.

When stenosis occurs in the blood vessels inside the human body or when there is a problem of narrowing the blood vessels for various reasons, move and install medical members for vascular expansion including balloons and stents to the location in the blood vessel where the problem occurs and get the treatment done.

In particular, angioplasty is widely used as an intervention for treating diseases in which blood vessels are narrowed. In angioplasty, a balloon, a stent, or both a balloon and a stent are delivered through a guide wire and a conduit to the point where the problem occurs (lesion site), and then the balloon or stent is inflated to dilate the blood vessels.

On the other hand, in relation to angioplasty, referring to FIG. 1, a conventional balloon catheter 10 is coated 20 with a drug on the outer circumference of the balloon to release the drug around the lesion through the blood vessel. A catheter is inserted and expanded into the lesion site.

However, when the above-mentioned drug is coated and released to the lesion site, the balloon catheter itself is inserted through the blood vessel, so when the catheter arrives at the actual lesion site due to wash-up by the blood flow and blood vessel inner wall There is a problem with the lack of drugs. In addition, in order to prevent this, more drugs are coated, and there is a problem in that side effects occur accordingly.

The background technology of the present application is disclosed in Korean Patent Publication No. 10-2017-0035968.

The present application is to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a double-structured balloon catheter that can solve the problem of insufficient drug when inserting the balloon catheter into a lesion site.

However, the technical problem to be achieved by the embodiments of the present application is not limited to the technical problems described above, and other technical problems may exist.

As a technical means for achieving the above technical problem, a dual structure balloon catheter according to an embodiment of the present application, a conduit unit having a tube shape, provided through the conduit unit to receive fluid through the conduit unit It may include a first balloon portion and a second balloon portion provided to surround the first balloon portion so as to be expandable in conjunction with the expansion of the first balloon portion.

In addition, the conduit unit may include a first conduit portion connected to the first balloon portion to supply fluid to the first balloon portion, and a first conduit portion connected to the second balloon portion to supply liquid to the second balloon portion. It may include two conduit parts, and the first balloon part may be partitioned and provided without communicating with the second balloon part so that the supplied fluid does not leak to the outside.

In addition, the second balloon portion may include a plurality of holes to pass the fluid supplied from the second conduit portion to the outside.

In addition, the size of the hole may be set according to the lesion site.

In addition, the second conduit part may be capable of sucking liquid with respect to the second balloon part and thus sucking blood clots at the lesion site.

The above-described problem solving means are merely exemplary and should not be construed as limiting the present disclosure. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and detailed description of the invention.

According to the problem-solving means of the present application described above, by providing a double-structured balloon catheter, there is an effect that can solve the problem of lack of drug when inserting the balloon (Balloon) catheter into the lesion site.

However, the effects obtainable herein are not limited to the effects described above, and other effects may exist.

1 is a view for explaining a drug release method of a conventional balloon catheter.
2 is a conceptual diagram of a conventional balloon catheter.
Figure 3 is a conceptual diagram for explaining a dual structure balloon catheter according to an embodiment of the present application.
Figure 4 is a conceptual diagram of a double structure balloon catheter according to an embodiment of the present application.
Figure 5 is a conceptual diagram of the use of a double structure balloon catheter according to an embodiment of the present application.

Hereinafter, embodiments of the present application will be described in detail so that those skilled in the art can easily practice with reference to the accompanying drawings. However, the present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. And in order to clearly describe the present application in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout this specification, when a part is said to be “connected” to another part, it is not only “directly connected”, but also “electrically connected” or “indirectly connected” with another element in between. "Including cases where

Throughout the present specification, when a member is referred to as being “on,” “above,” “on top of,” “below,” “below,” or “below” another member, this means that a member is located in relation to another member. This includes not only the case of contact but also the case of another member between the two members.

Throughout the present specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

In addition, when specifically defined throughout the present specification, the definition follows, and when there is no specific definition, it should be interpreted as meaning generally recognized by those skilled in the art.

1 is a view for explaining a drug release method of a conventional balloon catheter (10).

Referring to FIG. 1, a conventional balloon catheter 10 is inserted along a blood vessel into a lesion site (stenosis site) by coating 20 with a drug on the outer circumferential surface of the balloon. However, in this case, the conventional balloon catheter 10 has a problem in that the drug coated on the inner wall of the blood vessel is washed out and the drug to be released to the lesion site (stenosis site) is insufficient.

In addition, the conventional balloon (Balloon) catheter 10 has increased the coating amount of the drug to compensate for this problem, there is a problem that side effects occur due to excessive release of the drug accordingly.

2 is a conceptual diagram of a conventional balloon catheter (10).

Referring to FIG. 2, more specifically, the conventional balloon catheter 10 includes a shaft 22, a balloon 24, and a fluid 23 for expanding the balloon 24. can include

In other words, the conventional balloon catheter 10 expands the balloon 24 by supplying the fluid 23 when it reaches the lesion site (stenosis site) to transfer the drug coated on the outer circumferential surface of the balloon into blood vessels. By making contact with the inner wall, it was to release the drug.

Meanwhile, the shaft 22 is not limited to a name. That is, the shaft 22 refers to a conduit (tube) to which a balloon is attached, for example, a shaft (in the case of a product wrapped around a balloon on a shaft, the same applies below), a micro conduit, a conduit, a conduit unit, etc. It can be called variously. However, it is not limited thereto.

A double structure balloon catheter according to an embodiment of the present application may be aimed at solving the above problems.

Figure 3 is a view for explaining a double structure balloon (Balloon) catheter 100 according to an embodiment of the present application. Hereinafter, for convenience of description, the double structure balloon catheter will be referred to as the present catheter 100.

Referring to FIG. 3 , the present catheter 100 according to an embodiment of the present application may include a conduit unit 110, a first balloon portion 120, a second balloon portion 130, and a hole 150. .

According to one embodiment of the present application, the conduit unit 110 may have a tube shape. More specifically, the conduit unit 110 may have a shape (shape, shape, etc.) having a space in which a medical member, a first conduit part, a second conduit part, etc. can pass therein.

In addition, the conduit unit 110 may include a first conduit part, a second conduit part, and the like.

More specifically, the first conduit may be connected to the first balloon portion 120 to supply fluid to the first balloon portion 120 to be described later. That is, the first conduit may be provided to have a tube shape through which fluid may pass therein, thereby supplying fluid to the first balloon portion 120 .

In addition, the second conduit may be connected to the second balloon portion 130 to supply liquid to the second balloon portion 130 to be described later. That is, the second conduit may be provided to have a tube shape through which liquid may pass, so that liquid may be supplied to the second balloon part 130 .

However, it is not limited thereto. In another embodiment, the first conduit part and the second conduit part may divide the inside of the conduit unit as well as the shape of the tube (shape, shape, etc.) to allow liquid or fluid to pass therethrough, and the outer covering surrounds the first conduit part and the second conduit part. tubes may be included.

Meanwhile, according to one embodiment of the present application, the first balloon portion 120 may be provided (provided) through the conduit unit 110 so that fluid (gas) can be supplied through the conduit unit 110 . More specifically, it may be connected through the first conduit included in the conduit unit 110.

In addition, according to one embodiment of the present application, the second balloon portion 130 may be provided (provided) through the conduit unit 110 to be supplied with liquid through the conduit unit 110 . More specifically, it may be connected through the second conduit included in the conduit unit 110.

In addition, according to one embodiment of the present application, the second balloon portion 130 may be provided (provided) to surround the first balloon portion 120 so as to be expandable in conjunction with the expansion of the first balloon portion 120. . More specifically, the first balloon portion 120 receiving the fluid (gas) from the first conduit portion expands (expands) accordingly, and accordingly, the outer circumferential surface of the first balloon portion 120 is the second balloon portion ( 130) is pushed in a direction perpendicular to the circumferential direction. In this case, the second balloon portion 130 may expand in conjunction with the pushing force of the first balloon portion 120 .

On the other hand, according to one embodiment of the present application, the first balloon portion 120 may be partitioned and provided without passing through the second balloon portion 130 so that the fluid (gas) supplied from the first conduit portion does not leak to the outside. there is. However, it is not limited thereto.

Various methods obvious to those skilled in the art may be applied to connection, arrangement, or installation of the conduit unit 110, the first balloon portion 120, and the second balloon portion 130. In addition, it goes without saying that a connection scheme to be developed in the future can be applied.

In another embodiment, the first balloon portion 120 is disposed to surround the outer circumference (outer circumference) of the conduit unit 110, and a plurality of circumferential surfaces of the first conduit portion corresponding to the inside of the first balloon portion 120 are provided. A hole of may be formed. A medical member such as a stent may pass through the first conduit. Therefore, it is preferable that the plurality of holes are formed in a size that prevents the medical member from escaping through the holes. However, it is not limited thereto.

In addition, the plurality of holes may be set to a size through which fluid (gas) supplied to inflate the first balloon portion 120 may pass. However, it is not limited thereto.

In another embodiment, the conduit unit 110 is partitioned and distinguished from the first conduit part and the second conduit part included in the conduit unit 110, so that a medical member such as a stent can be moved (inserted) through the inside. It may be that a space is provided. That is, in addition to the first conduit unit and the second conduit unit, a space through which a medical member such as a stent can penetrate may be provided inside the conduit unit.

In another embodiment, the first conduit part included in the conduit unit 110 is connected through an opening at one end of the first balloon part 120 to supply fluid to the inside of the first balloon part 120 . In this case, an opening may be formed at one end of the first balloon unit 120, and another conduit distinct from the first conduit included in the conduit unit may be connected to the opening.

On the other hand, according to one embodiment of the present application, the second balloon unit 130 may include a plurality of holes to pass the fluid (liquid) supplied from the second conduit included in the conduit unit 110 to the outside. .

More specifically, in the case of supplying liquid medicine to the second balloon part 130 through the second conduit included in the conduit unit 110, the second balloon part 130 has a plurality of holes ( 150), the supplied liquid may be discharged to the inner wall of the blood vessel through the plurality of holes 150.

In addition, the size of the plurality of holes 150 of the above-described second balloon part 130 may be adjusted according to the type of drug. However, it is not limited thereto.

In another embodiment, the size of the plurality of holes 150 of the second balloon part 130 may be set according to the lesion area. More specifically, the size of the hole may be set based on a diameter of a blood vessel, a lesion area, a length of a lesion, a required amount of a drug, and the like.

On the other hand, according to one embodiment of the present application, the plurality of holes 150 included in the second balloon portion 130 have an inclination, for example, as the position moves from the first balloon portion 130 to the inner wall of the blood vessel. there may be

In other words, in the case where the plurality of holes 150 included in the second balloon portion 130 are formed in a direction perpendicular to the outer circumference (outer circumference) of the second balloon portion 130, the present catheter 100 When inserted into the blood vessel, it may be inclined to minimize the portion (portion) that opposes the inner wall of the blood vessel. For example, the plurality of holes 150 of the second balloon part 130 may be formed (provided, provided, etc.) to have a wider diameter as the height increases from the circumferential direction to the vertical direction, like a puddle. However, it is not limited thereto.

On the other hand, according to one embodiment of the present application, the second conduit unit may be capable of sucking liquid with respect to the second balloon unit 130 . More specifically, the second conduit not only supplies liquid (more specifically, a drug) to the second balloon part 130, but also sucks the liquid, thereby breaking blood vessels such as blood clots around the lesion site (stenosis site). It may be to remove by-products where there is an avoidable risk. However, it is not limited thereto.

Figure 4 is a conceptual diagram for explaining before the present catheter 100 is expanded according to an embodiment of the present application.

5 is a conceptual diagram for explaining after the present catheter 100 is expanded according to an embodiment of the present application.

Hereinafter, the present catheter 100 before and after expansion will be described with reference to FIGS. 4 and 5 .

Referring to FIG. 4, the first balloon portion 120 and the second balloon portion 130 of the present catheter 100 according to an embodiment of the present application include an elastic material, so that the first conduit portion and the second conduit portion If fluid (gas or liquid) is not supplied through, it may be able to maintain a contracted state.

In more detail, referring to Figure 4, according to one embodiment of the present application, the first balloon portion 120 and the second balloon portion 130 when there is no fluid supply, the outer circumference of the conduit unit 110 and the first The inner circumference of the balloon part 120 may be bonded and temporarily attached, and the inner circumference of the second balloon part 130 may be adhered to the outer circumference of the first balloon part 120 and temporarily attached. The temporary attachment means, for example, an attachment in a form in which attachment between each other can be separated when a fluid (liquid or gas) is supplied, and more preferably, the catheter 100 is inserted into a blood vessel In this case, it may mean an attachment in a form that does not spread due to friction of the inner wall of the blood vessel. However, it is not limited thereto.

Referring to FIG. 5 , the catheter 100 according to an embodiment of the present application can be understood in an expanded form in which fluid (gas or liquid) is supplied through the first conduit and the second conduit.

In more detail, referring to FIG. 5 , when the fluid (gas) 51 is supplied through the first conduit, the first balloon portion 120 may expand and increase its inner diameter. Accordingly, an expanded first area 160 is generated, and a fluid (gas) 51 may be included in the expanded first area 160 .

In addition, when the fluid (liquid) 52 is supplied through the second conduit, the second balloon portion 130 expands, thereby increasing its inner diameter. Accordingly, an expanded second area 170 is generated, and a fluid (liquid) 52 may be included in the expanded second area 170 .

In addition, although not shown in FIG. 5, in the case where the fluid (gas) 51 is supplied to the first balloon portion 120 and the fluid (liquid) 52 is not supplied to the second balloon portion 130 , This catheter 100 may also be utilized as a conventional balloon catheter 10. However, it is not limited thereto.

In a case opposite to the case described above as another embodiment, the fluid (liquid) 52 may be discharged without expanding.

The above description of the present application is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present application. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present application is indicated by the following claims rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof should be construed as being included in the scope of the present application.

100: double structure balloon catheter
110: conduit unit 120: first balloon part
130: second balloon part 150: hole

Claims (5)

In the balloon catheter,
A conduit unit having a tube shape;
a first balloon portion provided in communication with the conduit unit so as to be supplied with fluid through the conduit unit; and
A second balloon portion provided to surround the first balloon portion so as to be expandable in conjunction with the expansion of the first balloon portion;
The conduit unit,
a first conduit portion connected to the first balloon portion to supply fluid to the first balloon portion; and
A second conduit portion connected to the second balloon portion to supply liquid to the second balloon portion;
The first balloon portion is partitioned and provided without passing through the second balloon portion so that the fluid supplied does not flow out,
The second balloon part includes a plurality of holes so that the fluid supplied from the second conduit part can pass to the outside,
The size of the hole is set according to the lesion site,
In the second balloon part, the liquid supplied to the second conduit part can be discharged to the inner wall of the blood vessel through the plurality of holes, or the liquid can be sucked in, so that the blood clots at the lesion site can be suctioned and removed through the plurality of holes. provided so that
The hole, when the balloon catheter is inserted into the inside, as it goes up in the vertical direction toward the inner wall of the blood vessel will be a slanted hole that is formed wider in diameter, the dual structure balloon catheter.
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