KR20120013814A - Stent For Expending Lumen in Body And Inserting Device Using The Same - Google Patents

Abstract

PURPOSE: A stent for human body inner cavity expansion and a stent insertion apparatus including the same are provided to be securely settled on the inner wall of the human body. CONSTITUTION: A stent insertion apparatus comprises a stent(100) and a wire(200). The wire is formed into a polygonal shape and includes a plurality of crossing points(200c). The peripheral unit of each crossing point includes a curved surface area and a contact area. The curved surface area comes into contact with the inside diameter of the human body. The contact area comes into contact with a crossing wire.

Description

Stent For Expending Lumen in Body And Inserting Device Using The Same}

The present invention relates to a stent and a stent insertion apparatus including the same, more specifically, a plurality of wires are crossed and provided in the form of a tube or cylinder, in the stent mesh is formed in the periphery, the crossing wires contact As the part is in contact with the surface, relates to a stent and a stent insertion device that can more securely secure or expand the lumen in the human body, including the esophagus, biliary tract, blood vessels and the like.

In general, the stent used in the medical procedure is inserted along the lumen of the human body such as esophagus, biliary tract, and blood vessels, and aims to prevent stenosis and obstruction by securing a reticulated stent in the human body, and to secure or expand the lumen of the human body. Various forms of stent surgery are being done.

A common stent has a plurality of wires in contact with each other to cross and contract or expand, to secure the lumen by fixing in the human body.

However, the conventional stents are formed in a round shape having a curved surface around the intersection point where the wires intersect and contract and expand in contact with each other in an unstable state as the wire contracts and expands through point contact in the process of expansion. There is a problem that the contraction and expansion of the stent is unstable and ineffective, such that damage to the lumen of the human body is not limited.

Specifically, FIG. 1 is a view schematically showing a state in which a conventional conventional stent is inserted and settled in a human body. Referring to FIG. 1, it is conventionally used for the purpose of securing or expanding a lumen in a human body or preventing stenosis. The stent 300 'was formed in a form in which a plurality of wires were in contact with each other to cross and contract and expand.

As shown in Figure 1, the conventional stent (100 ') has a common wire round the circumferential surface cross to form a network. However, the rounded circumferential surface of the wires that are crossed and contacted is so round that the wire 300 'is unstable in contact with other wires and is ineffective in contracting and expanding.

And at the intersection where the plurality of wires 300 'intersect with each other because the circumferential surface of the wire 300' is rounded, the wires come into contact with other wires in contact with a point or a small area of lines or points, which makes it difficult to effectively expand. there was.

In addition, when the stent is inflated in the human body, the degree of expansion is not limited, and the stent is inflated excessively to cause damage to the human lumen.

An object of the present invention is to solve the above-mentioned conventional problems, a plurality of wires are crossed and inserted into the human lumen of the esophagus, biliary tract, blood vessels, etc. and settled in the human body to secure or expand the lumen of the tube or reticulum In the stent is provided in the form, a plurality of mesh is formed in the periphery due to the cross wires, as the wires intersecting the surface contact can implement the inner diameter of the stent desired by the operator. In other words, it is to provide a stent suitable for the inner diameter of the lumen of the human body to be firmly fixed.

In addition, each wire crossing and contacting is made of a polygon, and the intersection point of crossing and contacting is partially recessed to provide a stent formed to enable surface contact with other wires effectively.

In addition, the stent insertion is formed in the form of a tube provided with a receiving space therein is provided with an elastic member that provides elastic force, elastic force and restoring force in the body portion inserted into the lumen within the human body to enter and exit the lumen more effectively In providing a device.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

The human lumen expanding stent and the stent insertion device including the same according to the present invention for solving the above process are provided in the form of a tube so that a plurality of wires are intersected and inserted into the human body such as esophagus, bile duct, and blood vessel. In the stent, the mesh is formed in the periphery, the portion where the plurality of wires are in contact with each other is formed to make a surface contact, the plurality of wires are formed in a polygonal contact surface of the wires intersecting with each other It is formed to be possible.

In addition, portions of the plurality of wires that cross each other may have a surface contact formed in a polygon, and each of the plurality of wires includes a plurality of intersection points spaced apart by a predetermined distance so as to contact different wires. The circumference of the point includes a curved area in contact with the lumen in the human body and a contact area in contact with the intersecting wire, wherein adjacent contact areas are formed on opposite sides of the wire circumference, and the longitudinal width of the wire of the contact area is It is formed larger than the diameter of the wire.

In addition, the stent insertion device of the present invention is formed of a tubular shape having a receiving space therein is made of a flexible flexible material is inserted into the lumen in the human body, and includes a body portion formed with an opening through which the stent enters and exits, The body portion provided in the form may be provided with an elastic member for providing an elastic force or a restoring force to the body portion inserted into the human body.

The human lumen extension stent and the stent insertion apparatus including the same of the present invention for solving the above problems have the following effects.

First, in the process of contracting and expanding a plurality of wires in contact with each other and contracting and expanding, the wires contract and expand by making surface contact with other wires, thereby more firmly fixing on the inner wall of the human body to be inserted, and more effectively securing the lumen. There is an advantage.

Second, the stent has a cross point is formed on each wire constituting the stent, and each cross point is formed to be in contact with the inner diameter of the human body inserted into the curved area and the peripheral surface is formed in a curved form and the surface contact with other wires As the contact area is formed, the contact area is formed to be in contact with the contact area, and the expansion is possible, and the expansion is limited due to the curved area, thereby preventing excessive expansion of the inner diameter or stent expansion. As the curved area in contact with the inner diameter has a rounded periphery, damage to the blood vessel due to the stent procedure can be minimized.

Third, an elastic member having an elastic force and a restoring force is formed in a part of the body portion of the stent insertion device, and the body portion inserted into the human body can be moved more effectively along the path of the lumen. When the body part inserted into the human body and formed a bend when proceeding along the lumen path exits the linear region of the blood vessel or the outside of the blood vessel, the shape may be more effectively restored by the restoring force of the elastic member.

Fourth, the plurality of wires intersect while not in point contact but in surface contact. Thus, the volume of the stent can be made smaller than in the case where the wires are joined in point contact under the same elastic force or the like. Therefore, even if the size of the tube of the insertion device is formed small there is an advantage that can be effectively located inside the tube.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a view schematically showing a state in which a conventional conventional stent is inserted and fixed in the human body;
2 is a view schematically showing a stent in which a plurality of wires formed by a polygonal circumference formed by four sides according to a first embodiment of the present invention cross each other;
FIG. 3 is a view schematically showing a stent in which a plurality of wires formed by a polygon consisting of three planes around each other intersect with each other according to a first embodiment of the present invention;
4 is a view showing a coupling relationship between wires having a circumferential portion of a crossing point divided into a curved area and a contact area according to a second embodiment of the present invention;
5 is a view showing a coupling relationship of wires in which intersection portions of the wires are formed in polygons;
Figure 6a is a view showing a stent insertion device to enter the stenosis or occluded human lumen according to an embodiment of the present invention;
Figure 6b is a view showing the stent expands and enters the human lumen through the opening of the stent insertion device inserted into the stenosis or occluded human lumen according to an embodiment of the present invention; And
Figure 6c is a view showing a state in which the stent is settled in order to expand or secure the lumen of the stricture or occluded human body according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In describing the present embodiment, the same designations and the same reference numerals are used for the same components, and further description thereof will be omitted.

FIG. 2 is a view schematically showing a stent in which a plurality of wires formed by a polygon having a four-sided perimeter cross each other according to a first embodiment of the present invention, and FIG. 3 according to the first embodiment of the present invention. It is a figure which shows the stent which the some wire which the circumference part consists of the polygon which consists of three faces crossed each other.

In the stent 100 for securing the lumen within the constricted human body according to the first embodiment of the present invention, a plurality of wires 200 each having a circumferential surface in contact with each other are crossed to form a network having a tube or cylinder shape. Can be.

The stent 100 is provided in a form that can be effectively fixed along the lumen of the tube or the human body so that the plurality of wires 200 cross each other and are inserted into the human body such as the esophagus, biliary tract, and blood vessels to secure the lumen. As the wires 200 come into contact and intersect, a mesh is formed around the stent 100.

The stent 100 may be formed to expand to a size suitable for the inner diameter of the human body portion to be inserted, and may be inserted into the body organ by the various stent insertion apparatuses 400 to be fixed.

In addition, it is possible to secure the lumen by being fixed in the human body by the stent insertion device 400, which will be described later with reference to FIGS. 6A to 6C.

The wire 200 has a circumferential surface formed in a polygonal shape so that the wire 200 does not have point contact but is in surface contact with each other.

Therefore, the force that contracts or expands the stent 100 is transmitted from one wire 200 to the other wire 200 through a surface rather than a dot.

Accordingly, when the surface contact is made, the force is more effectively transmitted, thereby making it easier to contract and expand, and the durability of the wire 200 may be improved than when the point contact is made.

In the first embodiment, as shown in Figs. 2 to 3, the wires 200 are formed in a polygonal circumferential surface so that one surface of the wires 200 intersects with one surface of the other wire 200 in a flat surface. The intersection point 200c is formed in an area where they cross each other, thereby making surface contact with each other.

However, the circumferential surface of the wire 200 may be implemented in various forms such as forming patterns, bends, and angles corresponding to the surfaces in contact with each other so that the wires 200 may be contacted with each other more effectively.

Accordingly, the contact surface between the wires 200 may be made larger to allow the stent 100 to expand more effectively, and the stent 100 may be secured to the stenosis to more effectively secure the lumen of blood vessels.

On the other hand, the intersection point 200c at which each wire 200 crosses is formed to be spaced apart by a predetermined distance such that a plurality of wires can contact each other wire 200, and thus the mesh formed at the periphery also has a predetermined distance. Can be formed accordingly.

4 is a diagram illustrating a coupling relationship between wires having a circumferential portion of an intersection point divided into a curved area and a contact area according to a second exemplary embodiment of the present invention, and FIG. 5 is a coupling relationship between wires in which a cross portion of the wire is formed in a polygon. It is a figure which shows.

4 and 5, unlike the first embodiment in which the entire wire 300 is formed in a polygon and is in surface contact between the wires 200, only a portion of the wire 300 contacts. It is formed in a shape capable of surface contact, the remaining portion is to maintain a cylindrical or round shape.

Therefore, when the entire stent 100 is formed as a polygon, it is possible to minimize damage to an inserted human part that may occur while directly contacting an inner diameter of a body part into which an angled portion of the polygon is inserted.

In detail, referring to FIG. 4, the plurality of wires 300 cross each other to form a network-like cylinder or tubular stent 100. Therefore, each wire 300 includes a plurality of intersection points 300c spaced apart from each other by a predetermined distance.

The circumferential portion of the intersection 300c includes a curved area 340 in direct contact with the inner diameter of the human body portion to be inserted, and a contact area 320 in contact with the other wire 300b that intersects.

Therefore, while the wires 300 intersecting with each other are in surface contact with each other, the remaining portion of the portion where the wires 300 are in surface contact is formed into a curved surface to prevent the human body portion inserted into the stent 100 from being damaged. can do.

In addition, the plurality of wires intersect while not in point contact but in surface contact. Accordingly, the volume of the stent may be made smaller than in the case where the wires are joined while in point contact under the same elastic force or the like. Therefore, even if the size of the tube of the insertion apparatus is small, there is an advantage that the stent 100 can be effectively located in the tube.

In the present invention, the plurality of wires 300 cross each other to form a network stent 100, and contact areas adjacent to each other are formed on the other side of the periphery of the wire 300.

On the other hand, the portion except the cross point 300c of the wire 300 may be formed in various forms that do not damage the body portion to be inserted, in this embodiment the point except the cross point 300c is formed in a cylindrical shape do.

In addition, the contact area 320 may be formed in various shapes at the circumference of the wire 300, and in this embodiment, a portion of the circumference of the wire 300 having a cylindrical shape is recessed to form the contact area 320. do. Accordingly, the contact area 320 of the intersection 300c is stepped with a portion other than the intersection of the wire 300.

As a result, the other wire 300 is fitted into the contact area 320 formed in the recess of the wire 300 to be coupled. Therefore, the plurality of wires 300 are more firmly coupled to each other and the expansion or restoring force of any one wire is effectively transmitted to the other wire.

On the other hand, the stent 100 is located inside the tube of the stent insertion device in a compressed state, and is expanded while being discharged from the tube. Accordingly, the intersection 300c between the wires 300 constituting the stent 100 may change before and after compression. That is, the wire 300 moves in a predetermined interval as it expands while crossing each other.

Accordingly, the longitudinal width of the wire of the contact area 320 recessed in the circumference of the wire 300 may be larger than the diameter of the wire. In this case, as described above, a step is formed in a portion other than the intersection of the contact region 320 and the wire 300 of the intersection 300c of the wire 300. Therefore, the step serves as a stopper for limiting the moving distance of the wire 300 according to the expansion of the wire 300.

As a result, by limiting the moving distance of the wire 300 when the stent 100 is inflated, it is possible to prevent the stent 100 from being ruptured or damaged to be inserted into the human body.

On the other hand, referring to Figure 5 the intersection point 300c of the wire of the second embodiment of the present invention may be formed in a polygon. The polygons of the intersection points may be formed in various ways, and in this embodiment, only the intersection points of the cylindrical wires 300 are recessed in the polygonal shape.

Therefore, as described above, a step is formed between the portions other than the intersection point and the intersection point, and thus the operation and effect of the present invention are the same as described above, and thus the description thereof is omitted.

And when the entire intersection 300c is formed in a polygon, it is possible to easily form the stent 100 while intersecting the wire 300 without forming contact areas between adjacent intersections 300c in different directions. do.

Figure 6a is a view showing a stent insertion device to enter the stenosis or occluded human body according to an embodiment of the present invention, Figure 6b is a view of the stent insertion device inserted into the stricture or occluded human body according to an embodiment of the present invention FIG. 6C is a view illustrating a stent that expands and enters a blood vessel through an opening, and FIG. 6C is a view illustrating a stent for securing a lumen of a narrowed or occluded human body according to an embodiment of the present invention. .

6A to 6C, in order to fix the stent 100 in the human body, the stent insertion device 400 should be inserted along the path of the blood vessel to guide the stent 100 to the occluded or narrowed portion in the human body.

The stent insertion device 400 in the present embodiment includes a body portion 420 and the stent 100 described above.

The body portion 420 is formed of a flexible flexible material in the form of a tube having an accommodation space therein, is inserted into the lumen, and an opening 460 through which the above-described stent 100 enters and exits is formed.

6A to 6C, an elastic member 440 may be provided in the accommodation space inside the body part to provide elastic force and restoring force to the body part 420 inserted into the blood vessel.

The opening 460 is formed at the end of the body portion 420 inserted along the lumen of the human body so that the stent 100 is accessible.

The elastic member 440 is formed in the receiving space inside the body portion 420, and is formed as a spring along the inner diameter of a portion of the body portion 420 formed in a tubular shape.

In the present exemplary embodiment, the elastic member 440 is formed as a spring. However, the present invention is not limited thereto, and the elastic member 440 may be formed in the body 420 and may be provided in various forms having elasticity and restoring force.

Accordingly, the body portion 420 formed in a flexible flexible tubular shape is effectively moved or entered inside the human body to be inserted while maintaining a certain rigidity by the elastic force of the elastic member 440.

In addition, when the body portion 420, which has formed a bend when proceeding along the path of the inserted human body, exits to the linear region of the lumen or the outside of the human body, the shape may be more effectively restored by the restoring force of the elastic member 440. have.

The method of inserting the stent 100 into the lumen of the human body in order to secure the lumen of the obstructed and narrowed body can be implemented in various ways, as described above, the stent 100 for securing the lumen of the human body is a tube In and out of the stent through the balloon is inserted into the human body using a method such as inflating the stent can be universally applied.

As described above, the human body is more effectively occluded and narrowed by using a stent insertion device 400 formed of a stent 100 formed of a wire making surface contact and a body 420 having an elastic member 440. The lumen can be secured and restenosis can be prevented.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

100: stent 300: wire
200c: intersection 220: contact area
240: curved area 400: stent insertion device
420: body portion 440: elastic member
460: opening

Claims (7)

In the stent in which a plurality of wires are crossed and inserted into the human body such as esophagus, biliary tract, blood vessels, etc. to secure the lumen, and a mesh is formed at the periphery,
The stent where the plurality of wires are in contact with each other is formed to make a surface contact. The method of claim 1,
The stent of the plurality of wires is formed in a polygonal contact surface of the wire intersecting each other is in surface contact. The method of claim 1,
The stents of the plurality of wires crossing each other are in surface contact with each other formed in a polygon. The method of claim 1,
Each of the plurality of wires includes a plurality of crossing points spaced apart by a predetermined distance to contact different wires,
The circumference of each intersection point includes a curved area in contact with the inner diameter of the human body to be inserted and a contact area in contact with the intersecting wire,
Adjacent stents are formed on opposite sides of the wire circumference. The method of claim 4, wherein
The stent having a longitudinal width of the wire of the contact area is larger than the diameter of the wire. The stent of any one of claims 1 to 5; And
A body portion formed of an elastic flexible material in a tubular shape having an accommodation space therein and inserted into the human body, and having an opening through which the stent enters and exits;
Stent insertion apparatus comprising a. The method of claim 6,
Stent insertion device is provided with an elastic member for providing an elastic force or a restoring force in the body portion is inserted into the body in the body portion provided in the form of a tube.

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