KR102235960B1 - Length adjustable Stent for Lumen - Google Patents

Abstract

The present invention provides a lumen stent provided to expand the lumen including the esophagus, duodenum, and biliary tract in which the lumen is narrowed or occluded, comprising: an inner stent provided on the inner side; Including; but, the inner stent and the outer stent overlapping in a folded state and coupled to the catheter.
Therefore, if one procedure is difficult because the length of the stenosis or the occluded part of the lumen that must be expanded with a stent is longer than the length of the unit stent that can be inserted with a catheter, it is possible to simply and conveniently expand the stenosis, etc. It is possible to provide a stent for lumen that can be adjusted in length.

Description

Length adjustable Stent for Lumen

The present invention relates to a length-adjustable lumen stent, and in particular, a length-adjustable inner stent with improved structure to overcome the limitation of length in the process of inserting the stent by allowing the overlapped stent to be adjusted to the required length. It relates to a steel stent.

Humans are exposed to many dangers, diseases, etc. during their birth and end of life.

When a human is ill, treatment is performed through various methods such as incision and drug injection, depending on the cause, type, and location of the disease through medical treatment and photo reading.

Among these outbreaks, when blood vessels are blocked or narrowed, as well as cases in which the lumen such as the esophagus, duodenum, and biliary tract are narrowed or obstructed, the inherent function of the lumen to move body fluids or food may be lost or decreased There is a concern that there is.

As a means to expand such a narrowed or obstructed lumen, stents are currently being widely applied.

In other words, the stent is to widen or open the lumen such as the esophagus, intestines, biliary tract, blood vessels, etc. of the human body due to an accident, disease, surgery, etc., and has a cylindrical net structure.

Among stents, self-expanding stents are most commonly used. Gaga-expandable stents are made of a shape memory alloy and have a cylindrical mesh structure, and are installed in a folded state to have a small diameter in a catheter inserted into a lumen, and are placed in the required lumen, so that the original diameter is reduced to the original diameter due to the shape memory effect. As the swelling is restored, the constricted or occluded lumen area can be expanded.

In order to weave such a stent into a cylindrical net, many weaving methods have been developed, and various forms of the stent have been developed.

In addition, the size of the stent is coupled and moved in a folded state with the catheter, so it has limitations due to flexion in the process of moving to the required lumen position, the size of the space formed by the lumen, and flexibility of the catheter.

For example, if the length of the constricted area of the lumen is 30 mm, but the length after the expansion of the stent that can be combined with the catheter is 20 mm, then two or three times with a 20 mm long stent. Should be done. And, even if the stricture area is 20mm, the stent must be performed so that the lumen can be expanded even before and after the stricture area, so there is a problem in that the stent is operated twice.

In this case, since several procedures must be performed, the procedure takes a long time and suffers from problems or discomfort, such as increasing patient pain due to the procedure, so if a rather long stenosis or obstruction is performed with a stent, it is possible to do so at once. It is desirable that the procedure is performed.

[references]

Unexamined Patent Publication No. 10-2012-0023932 (published on March 14, 2012)

Unexamined Patent Publication No. 10-2011-0057514 (published on June 1, 2011)

It is an object of the present invention to conveniently and conveniently provide a simple and convenient stenosis, etc., when a single procedure is difficult because the length of a stenosis or obstruction of a lumen that must be expanded with a stent is longer than the length of a unit stent that can be inserted with a catheter at one time. It is desirable to provide a stent for an adjustable lumen that can be expanded.

In addition, another object of the present invention, it is desirable to provide a stent for lumen that can be adjusted in length, which can reduce the operation time and pain of the patient.

In addition, another object of the present invention, it is desirable to provide a stent for a lumen whose structure is simple and easy to use and adjustable in length.

An object of the present invention, in a lumen stent provided to expand the lumen including the esophagus, duodenum and biliary tract constricted or occluded, the inner stent provided on the inside; An outer stent surrounding the outer side of the inner stent; including, wherein the inner stent and the outer stent overlap in a folded state and are achieved by a lumen stent, characterized in that they are coupled to the catheter.

In addition, it is preferable that the inner stent is provided in plural so as to overlap each other.

In addition, it is preferable that a suture that can be pulled from the outside is coupled to one side of the inner stent.

In addition, when the catheter pushes the inner and outer stents at a set position, the inner and outer stents are restored and expanded, and then the user pulls the male finger with a tensioning means including a forceps, the inner stent is moved against the outer stent. It is preferable to be able to slide.

In addition, it is preferable that the inner and outer stents are coated with a PTFE material to enable sliding movement.

In addition, the suture is preferably colored to be distinguishable from the outer stent and the inner stent.

Therefore, according to the present invention, if the length of the stenosis or the occluded portion of the lumen that must be expanded with a stent is longer than the length of a unit stent that can be inserted with a catheter at a time, it is difficult to perform one procedure simply and conveniently. It is possible to provide a stent for a lumen that can be extended with an adjustable length.

In addition, it is possible to provide a length-adjustable lumen stent that can reduce the operation time and reduce the pain of the patient.

In addition, it is possible to provide a stent for a lumen that has a simple structure and is easy to use and can be adjusted in length.

1 is a schematic cross-sectional view showing the operation process of the length adjustable lumen stent according to an embodiment of the present invention,
2A to 2F are cross-sectional views for explaining the operation process of the lumen stent,
3 is a cross-sectional view showing a state in which a stent for a lumen with adjustable length according to another embodiment of the present invention is mounted on the lumen.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms different from each other, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the scope of the claims.

With reference to the accompanying drawings below will be described in detail for the implementation of the present invention. Regardless of the drawings, the same reference numerals refer to the same elements, and "and/or" includes each and all combinations of one or more of the mentioned items or components.

The terms used in the present specification are for describing exemplary embodiments and are not intended to limit the present invention. In the present specification, the singular form also includes the plural form unless specifically stated otherwise. As used herein, “comprises” and/or “comprising” do not exclude the presence or addition of one or more other elements other than the mentioned elements.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used with meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless explicitly defined specifically.

The length-adjustable lumen stents (100, 200, hereinafter referred to as'lumen stents') according to exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

1 is a schematic cross-sectional view showing the operating process of the length-adjustable lumen stent according to an embodiment of the present invention, Figures 2a to 2f are cross-sectional views for explaining the operating process of the lumen stent, Figure 3 is the present It is a cross-sectional view showing a state in which a stent for lumen adjustable in length according to another embodiment of the present invention is mounted in the lumen.

Hereinafter, for convenience of explanation, it is assumed that the lumen A such as the esophagus, duodenum, and biliary tract is constricted and the constricted area B is extended to the lumen stent 100 as shown in FIG. 1. Although only the constriction area (B) is described as an example, it does not exclude that the present invention is applied to the case of expanding the occluded area.

Lumen stent 100 according to an embodiment of the present invention, as shown in Figures 1 to 2f, and an inner stent 110 provided on the inside; Including an outer stent 130 surrounding the outer side of the inner stent 110, wherein the inner stent 110 and the outer stent 130 are preferably coupled to the catheter 180 by overlapping in a folded state. . In addition, it is even more preferable that one side of the inner stent 110 is provided with a suture 150 coupled to the wire of the inner stent 110 so that a user or a surgeon can pull it from the outside.

The inner stent 110 and the outer stent 130 include various types of stents that can be used for lumen, and the shape in which the wires constituting them are combined also include a grid type, a mesh type, etc. It is preferable that the material is a shape enterprise alloy containing a nickel-titanium alloy. It is preferable that the material of the suture 150 includes a known material.

In particular, a suture 150 is coupled to an end portion of the inner stent 110 as shown in the enlarged view of FIG. 2D.

Such a suture 150 is provided in the inner stent 110, so as to be described later, the suture 150 is held by a tensioning means 170 including forceps in the shape of a forceps, and the inner stent with respect to the outer stent 130 The length of the lumen stent 100 can be adjusted by moving 110 to be slidable.

In addition, the suture 150 is preferably coated in a color such as blue to distinguish it from the wires constituting the inner stent 110 and the outer stent 130, and by this coloring, the operator can connect the suture 150 with the wire. Since it can be easily distinguished, the suture 150 can be easily picked up with the tensioning means 170.

Here, the material of the wire constituting the inner stent 110 and the outer stent 130 includes shape company alloy, but as described above, the inner stent 110 must slide with respect to the outer stent 130, so the inner side The coefficient of friction between the stent 110 and the outer stent 130 should not be high. Therefore, the inner stent 110 and the outer stent 130 may be surface-treated such as coating with a sticky material such as a commonly used silicone material, and coated with a PTFE (Polytetrafluoethylene) material having a low coefficient of friction and good abrasion resistance. It is preferable to have a surface treatment comprising a.

That is, the limited length of the unit stent that can be treated through the catheter 180 by sliding the inner stent 110 with respect to the outer stent 130 coupled to the wall surface of the lumen (A) (Fig. 2c, Fig. 2f) If the length of the constricted portion (B) (see'X1' in Figs. 2a to 2c and Fig. 2f, for example, 30 mm) is longer than'L1' of, for example, 20mm) There was a problem that the unit stent was applied over. However, as will be described later, the lumen stent 100 according to the present invention can solve this conventional problem simply and conveniently by utilizing a plurality of overlapped stents.

The tensioning means 170 is provided in a variety of known aggregate shapes including forceps so that the inner stent 110 is slidable with respect to the outer stent 130 by holding the suture 150 through an endoscope, etc. It is desirable to have a groove that can apply force to it.

The catheter 180 includes a tube 183 that guides the outer stent 130 and the inner stent 110 to the constriction area (B) to be treated by maintaining the folded state in an overlapping manner, and the tube 183 accommodated inside the tube. A means (not shown) for pushing the inner stent 110 and the outer stent 130 into an area near the constricted portion (B) is provided. In addition, a guide wire 185 for guiding the catheter 180 along the lumen to the targeted constriction area B is also provided.

The operation process of the lumen stent 100 having such a configuration will be described in detail with reference to FIGS. 2A and 2F as follows.

First, as shown in FIG. 2A, the catheter 180 moves along the lumen A along the guide wire 185 to reach the constriction area B. Of course, inside the tube 183 of the catheter 180, the inner stent 110 and the outer stent 130 are overlapped and accommodated in a folded state. In this process, the operator or user can stably find the stricture area B through an endoscope.

Next, as shown in FIG. 2B, when the user or the operator adjusts the catheter 180 and pushes the overlapped inner stent 110 and the outer stent 130 from the tube 183, the inner stent 110 and The outer stent 130 is in contact with the wall surface of the lumen A from the right end of the outer and inner stents 130 and 110 as the shape of the outer stent 130 is restored and expanded due to the property of the shape memory alloy.

Through this process, as shown in Fig. 2c, the outer stent 130 and the inner stent 110 coupled to the catheter 180 are located in the constricted area (B) of the lumen (A), and the catheter 180 is removed. It will be.

Next, as shown in FIG. 2D, the user grabs the suture 150 using the forceps-shaped tensioning means 170 including forceps and pulls the suture 150 to the left. When a force is applied to the suture 150 by the tensioning means 170, the length is increased as if the trap narrows as it contracts from the left area of the inner stent 110, so that the left area of the inner stent 110 is deformed in the form of a funnel. . Due to this deformation, the inner stent 110 can be moved from the outer stent 130 while minimizing interference with the protruding region (see'B1' in FIGS. 2C to 2E) of the left side of the constriction area (B). I can.

Next, as shown in FIG. 2D, when the extension of the left area of the inner stent 110 is completed, the inner stent 110 slides with respect to the inner stent 110 by the tensile force of the tensioning means 170 as shown in FIG. 2E. .

When this sliding movement is completed through an endoscope, etc., and the tensioning means 170 is separated from the suture 150, the state as shown in Fig. 2f becomes a constriction area (B) that is larger than the length of the unit stent (see'L1' in Fig. 2f). ) Beyond the length (see'X1' in FIG. 2f) (see'L2' in FIG. 2f) can be covered with the lumen stent 100 composed of the inner stent 110 and the outer stent 130.

In particular, in this process, the inner stent 110 and the outer stent 130 can easily and simply form the area (refer to'L' in Fig. 2f) in the constriction area (B), so that the entire constriction area (B) is The length can be extended more stably.

On the contrary, when the unit stent is performed twice in the related art, it is not easy to find the location of each of the first and second unit stents (here, the unit stent means one of the inner or outer stents of the present invention) It can be seen that it is also not easy to make them overlap.

Therefore, according to the present invention, if the length of the stenosis or the occluded portion of the lumen that must be expanded with a stent is longer than the length of a unit stent that can be inserted with a catheter at a time, it is difficult to perform one procedure simply and conveniently. It is possible to provide a stent for a lumen that can be extended with an adjustable length.

In addition, it is possible to provide a length-adjustable lumen stent that can reduce the operation time and reduce the pain of the patient.

In addition, it is possible to provide a stent for a lumen that has a simple structure and is easy to use and can be adjusted in length.

On the other hand, the lumen stent 200 according to another embodiment of the present invention, as shown in Figure 3, the inner stent (210a, 210b) disposed on the inner side of the outer stent 230 is a plurality of mutually overlapping It is even more preferable to be provided with.

In this embodiment, unlike the above-described embodiment, two inner stents 210a and 210b are formed, and three or more may be provided as necessary.

The lumen stent 200 according to the present embodiment can also be brought into the state of FIG. 3 through the same process of FIGS. 2A to 2E of the above-described embodiment, and thus, a detailed description thereof will be omitted and briefly described as follows.

In this case, the inner stent (210a, 210b), after picking each of the two fingers (not shown) with the tensioning means (170), the inner stents (210a, 210b) are integrated at the same time from the outer stent (230) from the outer stent (230). ) And the two inner stents (210a, 210b) are moved to the overlapping area, and then the tensioning means is separated from the neck.

Next, the innermost stent 210b, which is located at the innermost side and located on the leftmost side of FIG. 3, is held by the tensioning means (not shown), and then pulled to slide the innermost stent 210b from the inner stent 210a. The lumen (A) by separating the tensioning means at the position of FIG. 3 where the right area of the inner stent 210b and the left area of the inner stent 210a overlap each other, and having three lumens stents 200 in the same state as in FIG. 3 The constriction area (B) of can be expanded.

Accordingly, according to the present invention, there is an advantage that a longer constricted area can be performed simply and conveniently at a time.

Herein, although various embodiments of the present invention have been illustrated and described, those skilled in the art having ordinary knowledge in the technical field to which the present invention belongs will be able to see that the present embodiments can be modified without departing from the principles or spirit of the present invention. will be. The scope of the invention will be determined by the appended claims and their equivalents.

100: lumen stent 110: inner stent
130: outer stent 150: suture
170: tensioning means 180: catheter
183: tube 185: guide wire
A: lumen B: stricture area
L1, L2: unit length

Claims (6)

In the lumen stent provided so as to expand the area in which the lumen including the esophagus, duodenum, and biliary tract is narrowed or occluded,
An inner stent provided on the inner side;
Including; an outer stent surrounding the outside of the inner stent,
The inner stent and the outer stent are overlapped in a folded state and coupled to the catheter,
A suture that can be pulled from the outside is coupled to one side of the inner stent,
After the catheter pushes the inner and outer stents from the set position, the inner and outer stents are restored and expanded
Lumen stent, characterized in that the inner stent is slidably movable with respect to the outer stent when the user pulls and pulls the suture with a tensioning means including forceps. The method of claim 1,
The inner stent is a lumen stent, characterized in that provided with a plurality of mutually overlapping possible. delete delete The method of claim 1,
The inner and outer stents are lumen stents, characterized in that coated with a material containing PTFE to enable sliding movement. In the lumen stent provided so as to expand the area in which the lumen including the esophagus, duodenum, and biliary tract is narrowed or occluded,
An inner stent provided on the inner side;
Including; an outer stent surrounding the outside of the inner stent,
The inner stent and the outer stent are overlapped in a folded state and coupled to the catheter,
A suture that can be pulled from the outside is coupled to one side of the inner stent,
The suture is a lumen stent, characterized in that the color to be distinguishable from the inner stent and the outer stent.

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