KR20210109191A - Stent - Google Patents

Abstract

The present invention relates to a stent located in blood vessels or lesions by using a catheter. According to the present invention, disclosed is a technology that can improve the convenience and efficiency of a procedure for installing the stent in the body by comprising: a front part organized in a net form and having a form of an expandable tube; a rear part connected to the front part, organized in the net form, and having a form of an expandable tube; and a core part having the form of a tube organized in the net form, interposed between the front part and the rear part, and being separated by being isolated between the front part and the rear part.

Description

stent {Stent}

The present invention relates to a stent inserted into a stenosis or lesion site in the body to secure a space.

A stent is a medical device in the form of a cylinder or tube implanted to widen or open the stenosis site as a response to stenosis in which the lumen of the human body is narrowed such as the esophagus, intestinal tract, biliary tract, and blood vessels due to disease, accident, surgery, etc.

When implanting a stent into the body, there are two important considerations. One is to select a stent of the appropriate size and length, and the other is to place the stent in a precisely planned location. The size of the appropriate diameter can be measured by measuring the size of the blood vessel, and it is appropriate to select the length of the stent short enough to fit the size for the purpose of installation.

However, most of the stents currently used are in a form in which the stent protrudes and unfolds while the catheter is removed during the installation process. The position of the blood vessel is changed by many variables such as the curvature of the blood vessel, the position of the catheter, elasticity, and the operator's control, or it is difficult to place the catheter in an accurate position. As most of the experience has accumulated, this difficulty is overcome to a large extent, but instead, in order to install the stent more safely, choose a longer stent rather than a stent of just the right length to determine the point where the stent should be placed even if the position is slightly misaligned. It is common not to overdo it.

As a safe and easy way to spread the stent, it is convenient to spread the stent when it is spread from the distal portion of the lesion site, but there is a problem in that the length of the stent to be installed becomes considerably longer. In addition, an unnecessarily long stent may increase the likelihood of complications such as thromboembolism and intimal thickening in blood vessels.

Therefore, a technology capable of overcoming these difficulties has been required.

Republic of Korea Patent Publication No. 10-2011-001797

An object of the present invention is to solve the conventional problems as described above, to provide a stent that can be selectively installed in response to the size or length of the lesion site.

A stent according to an embodiment of the present invention for achieving the above object is a stent disposed in a blood vessel or near a lesion using a catheter, is organized in a net shape, and has a diameter while being drawn out of the catheter. a front portion having the form of a tube that expands to any size; The rear part is spaced apart from the rear of the front part by a predetermined interval, is connected to the front part, is organized in a network, and has the form of a tube whose diameter can be expanded to an arbitrary size while being drawn out of the catheter. ; And it has a form of a tube that is organized in a network and can be expanded to any size while being drawn out of the catheter, and is interposed between the front part and the rear part, but the front part and the rear part a core part that can be separated by being separated between the parts; It may be characterized as one of including.

Here, the front part and the rear part are connected by at least one bridge wire, and the bridge wire has a front end connected to the front part through (passing through) the inside of the core part, and a rear end is the rear part It can also be characterized as being connected to .

Here, to prevent the rear part from being inserted into the core part, the diameter of the front end side of the rear part may be equal to or larger than that of the rear end side of the core part as another feature.

Here, another feature may be that a diameter of a portion of the rear end of the front portion is formed smaller than a diameter of the front end of the core portion so that the front portion can be inserted into the core portion.

Here, it may be further characterized in that it has a tapered shape such that the diameter of the rear end portion of the front part decreases toward the rear side.

Here, another feature may be that the shape of the network of the front part and the shape of the network of the core part are different from each other.

Here, it may be further characterized that the holes of the network structure of the front part form a square shape, and that the holes of the network structure of the core part have a hexagonal shape.

Here, it may be another feature that the holes of the network structure of the front part form a hexagonal shape, and that the holes of the network structure of the core part form a square shape.

Since the stent according to the present invention can install only the core part or the core part, the rear part and the front part, it is possible to perform an appropriate stent installation procedure according to the operation situation. Therefore, there is an effect that can improve the convenience and efficiency of the procedure.

1 is a view schematically showing a stent according to an embodiment of the present invention.
Figure 2 is a view schematically showing the front portion and the rear portion of the stent according to an embodiment of the present invention.
3 is a view schematically showing an applied form of a stent according to an embodiment of the present invention.
4 is a view schematically showing the front part and the rear part of the applied form in the stent according to an embodiment of the present invention.
5 is a view schematically showing the state that the stent according to an embodiment of the present invention is embedded in the catheter.
6A to 6D are views schematically illustrating a state in which a stent according to an embodiment of the present invention is installed around a lesion.
7 is a view schematically illustrating a state in which the core part of the stent according to an embodiment of the present invention is installed on the lesion.
8 is a diagram schematically illustrating a state in which a stent according to an embodiment of the present invention is installed around a lesion. ,

Hereinafter, a preferred embodiment will be described with reference to the accompanying drawings so that the present invention can be understood in more detail.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that no other element is present in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, in order to facilitate the overall understanding, the same reference numerals are used for the same components in the drawings, and duplicate descriptions of the same components are omitted.

1 is a view schematically showing a stent according to an embodiment of the present invention, Figure 2 is a view schematically showing a front portion and a rear portion of the stent according to an embodiment of the present invention.

1 and 2, a stent according to an embodiment of the present invention is a stent disposed in a blood vessel or near a lesion using a catheter, and includes a front part, a rear part, and a core part.

When the stent 10 is installed in the body, after entering the body from the front part 200 , the core part 300 enters and the rear part 100 enters.

The front part 200 is organized in a net shape and has an external shape in the form of a tube. The front part 200 has the form of a tube whose diameter is extended to an arbitrary size while being drawn out of the catheter.

As shown in the figure, the form organized in a network in the front part 200 may be organized in the form of a net in which holes in the form of a square or rhombus are formed, and in the form of a network in which holes in the form of polygons are formed. it is also possible

The rear side of the front part 200 is connected to the rear part 100 as shown in FIG. 2 .

The rear part 100 is spaced apart from the rear side of the front part 200 by a predetermined interval, and is connected to the front part 200 . The rear part 100 is structured in a mesh and has the shape of a tube. The rear part 100 is also in the form of a tube whose diameter can be expanded to any size while being drawn out of the catheter.

As shown in the figure, the form organized in a network in the rear part 100 may be organized in the form of a net in which a hole in the form of a rectangle or a rhombus is formed, and is organized in the form of a net in which a hole in the form of a polygon is formed. it is also possible

The front part 200 and the rear part 100 are connected by at least one or more bridge wires 150 as shown in FIG. 2 . And the bridge wire 150 passes through the inside of the core part 300 as shown in FIG. 1 , the front end is connected to the front part 200 , and the rear end is connected to the rear part 100 .

As shown in FIG. 1, the stent 10 in the expanded state has its inner diameter reduced and the diameter is expanded as the stent comes out from the catheter that has entered the body after being placed inside the catheter in a contracted form.

In addition, it is preferable that the rear part 100 can be prevented from being inserted into the core part 300 . To this end, in a state in which the diameters of the rear part 100 and the core part 300 are respectively expanded, the diameter of a part of the front end of the rear part 100 is equal to or larger than the diameter of the rear end of the core part 300 . desirable.

The core part 300 has the form of a tube organized in a network. The core part 300 has the form of a tube whose diameter can be expanded to any size while being drawn out of the catheter, and is interposed between the front part 200 and the rear part 100, but the front part 200 and the rear part 100 may be separated from each other.

The form organized in a network in the core part 100, as shown in the figure, may be organized in the form of a network in which a hole in the form of a square or rhombus is formed, and is organized in the form of a network in which a hole in the form of a polygon is formed. It is also possible that

And, it is preferable that the shape of the network of the front part 200 and the shape of the network of the core part 300 are different from each other.

For example, if the network hole of the front part 200 has a rectangular shape, the network hole of the core part 300 may have a hexagonal shape.

As described above, when the network structure of the front part 200 and the core part 300 is different from each other, the front part 200 is contracted and the part that comes into contact with the core part 300 when it is recovered by the catheter. Even if there is this, the area or part of the contacted part is reduced.

Accordingly, when the front part 200 is recovered, the contact between the front part 200 and the core part 300 is suppressed, so that the front part 200 can be easily recovered.

It is sufficiently possible and preferable that the hole of the network structure of the front part 200 forms a hexagonal shape, and that the hole of the network structure of the core part 300 forms a square shape.

On the other hand, an applied form as follows is also sufficiently possible.

Figure 3 is a view schematically showing a stent according to an applied embodiment of the present invention, Figure 4 is a view schematically showing the rear portion and the front portion of the stent according to the applied embodiment of the present invention.

The stent 10 ′ as referenced in FIGS. 3 and 4 is the same as that described above, so it can be substituted for the one described above, but there is a slight difference in the front part 200 ′, so the part with the difference will be described. do

The front part 200' is structured in a net, and has the form of a tube whose diameter is extended to an arbitrary size while being drawn out of the catheter.

Then, in a state in which the diameter of each of the front part 200 ′ and the core part 300 is expanded, so that the front part 200 ′ can be recovered more easily through the inside of the core part 300 , the front part The diameter of a part of the rear end of 200 ′ is formed smaller than the diameter of the front end of the core part 300 .

As such, when the diameter of a part of the rear end of the front part 200 ′ is formed smaller than the diameter of the front end side of the core part 300 , the recovery of the front part 200 ′ is smooth when the front part 200 ′ is recovered. helps make it happen.

Furthermore, as shown in FIGS. 3 and 4 , if the front portion has a tapered shape such that the diameter of a portion of the rear end side of the front portion 200 ′ adjacent to the core portion 300 decreases toward the rear side, the front It is also preferable in that the reduction can be made more easily when the part 200' is recovered.

And, as described above, it is preferable that the shape of the network of the front part 200 ′ and the shape of the network of the core part 300 are different from each other.

On the other hand, since the core part 300, the rear part 100, and the bridge wire 150 are the same as those described above with reference to FIGS. 1 and 2, they may be substituted for those described above.

5 is a view schematically showing a side cross-sectional portion of a stent and a catheter according to an embodiment of the present invention, Figures 6a to 6d is a view schematically showing a state that the stent according to an embodiment of the present invention is installed in the body .

5, the rear portion 100, the core portion 300, and the front portion 200' of the stent are embedded in the front portion of the outer tube 21 of the catheter 20 in a contracted state. .

And when the anterior side of the catheter 20 is located near the lesion using the catheter 20, the outer tube 21 of the catheter 20 in a state where the position of the holder 23 is fixed as shown in FIG. 6a move backwards together.

Since the position of the holder 23 is fixed while the outer tube 21 is moved to the rear, the stent 10 ′ comes out of the outer tube 21 near the lesion 35 in the blood vessel 30 . That is, as shown in FIG. 6A , as the front part 200 ′ comes out of the outer tube 21 , the diameter is expanded to be seated in the blood vessel 30 .

Subsequently, as shown in FIG. 6b , the diameter of the core part 300 is expanded as it comes out of the outer tube 21 . And the core part 300 is positioned at the lesion location. And if the outer tube 21 is continuously moved backward, the rear part 100 also comes out of the outer tube 21 and can be disposed in the blood vessel. Whether or not to arrange the rear part 100 in the blood vessel may be determined according to the selection of the user who is a doctor at the operation site.

When the core part 300 is positioned in the blood vessel 30 at the location of the lesion 35 as scheduled, only the core part 300 may be left in the blood vessel, so that the core part 300 is left in accordance with the user's selection. The rear part 100 and the front part 200 may be recovered using the catheter 20 .

For example, when the outer tube 21 of the catheter 20 is moved forward in the state as shown in FIG. 6B , the rear part 100 is contracted again and is drawn into the inner side of the outer tube 21 . If the outer tube 21 is continuously advanced, the outer tube 21 enters the inside of the core part 300 in an expanded state as shown in FIG. ) is introduced into the Subsequently, as shown in FIG. 6D , when the outer tube 21 is continuously advanced, the front part 200 ′ is contracted and introduced into the outer tube 21 . When the front part 200 ′ is drawn into the outer tube 21 , the outer tube 21 is retracted in the opposite direction to leave only the core part 300 in the lesion 35 .

7 is a view schematically showing that the core portion of the stent according to an embodiment of the present invention is disposed on the lesion.

When the front part 200 ′ is all contracted and drawn into the outer tube 21 and the catheter is removed, as shown in FIG. 7 , only the core part 300 remains at the lesion site to secure intravascular space. becomes

Therefore, it is possible to perform a procedure in which only the core part 300 of an appropriate size according to the size of the lesion 35 is placed in the blood vessel.

On the other hand, if necessary, as shown in FIG. 8 , a form in which the rear part 100 , the core part 300 , and the front part 200 of the stent 10 ′ are installed on the lesion together is also possible.

8 is a diagram schematically illustrating a state in which a stent according to an embodiment of the present invention is disposed near a lesion in a blood vessel.

As shown in FIG. 8 , the front part 200 ′ of the stent 10 ′ is disposed and then the core part 300 is expanded near the lesion, but the length L3 of the core part 300 is the lesion 35 . ) is shorter than the length L35, the front part 200 ′ and the rear part 100 may also be disposed in the blood vessel to cover the length L35 of the lesion 35 .

In this way, in the operation of installing the stent 10 ′ on the lesion, only the core part 300 of the stent 10 ′ is installed or the core part 300 , the rear part 100 and the front part ( 200`) can be selected and executed, so it helps to increase the success probability of the stent insertion procedure, and safety can be secured during the stent insertion procedure.

As described above, in the stent according to the present invention, only the core part or the core part, the rear part and the front part can be installed according to the selection of the user who is a doctor during surgery, so that an appropriate stent installation procedure is possible according to the surgical situation. Accordingly, there is an advantage in that the convenience and efficiency of the procedure are improved.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings, but since the above-described embodiments have only been described with reference to the preferred embodiments of the present invention, the present invention It should not be construed as being limited only to the embodiments, and the scope of the present invention should be understood as the following claims and their equivalents.

10, 10`: stent
100: rear 150: bridge wire
200, 200`: front part 300: core part

Claims (8)

A stent placed in a blood vessel or near a lesion using a catheter,
A front portion having the form of a tube that is organized on a net and is extended to an arbitrary size while being drawn out of the catheter;
The rear part is spaced apart from the rear side of the front part by a predetermined interval and is connected to the front part, is organized in a network, and has the form of a tube whose diameter can be expanded to an arbitrary size while being drawn out of the catheter. ; and
It is organized in a network and has the form of a tube whose diameter can be expanded to any size while being drawn out of the catheter, and is interposed between the front part and the rear part, but the front part and the rear part a core part that can be separated by being separated from one another; A stent comprising a.
The method of claim 1,
The front part and the rear part are connected by at least one bridge wire,
The bridge wire is a stent, characterized in that the front end is connected to the front portion and the rear end is connected to the rear portion through (passing through) the inside of the core portion.

3. The method of claim 2,
The stent, characterized in that the diameter of the front end portion of the rear portion is formed equal to or larger than the rear end diameter of the core portion so as to prevent the rear portion from being inserted into the core portion.
4. The method of claim 3,
so that the front part can be inserted into the inside of the core part
A stent, characterized in that the diameter of the rear end portion of the front portion is formed smaller than the front end diameter of the core portion.
5. The method of claim 4,
The stent, characterized in that it has a tapered shape so that the diameter of the rear end portion of the front portion decreases toward the rear side.
6. The method of claim 5,
The stent, characterized in that the shape of the network tissue of the front part and the network structure of the core part are formed differently from each other.
7. The method of claim 6,
A stent, characterized in that the hole of the network tissue of the front part forms a square shape, and the hole of the network tissue of the core part has a hexagonal shape.
7. The method of claim 6,
A stent, characterized in that the hole of the network tissue of the front part forms a hexagonal shape, and the hole of the network tissue of the core part has a rectangular shape.

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