KR20160004766A - Stent for cerebral aneurysm - Google Patents

Stent for cerebral aneurysm Download PDF

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Publication number
KR20160004766A
KR20160004766A KR1020140083705A KR20140083705A KR20160004766A KR 20160004766 A KR20160004766 A KR 20160004766A KR 1020140083705 A KR1020140083705 A KR 1020140083705A KR 20140083705 A KR20140083705 A KR 20140083705A KR 20160004766 A KR20160004766 A KR 20160004766A
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South Korea
Prior art keywords
aneurysm
main body
contact network
network
blood vessel
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KR1020140083705A
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Korean (ko)
Inventor
김현실
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김현실
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Priority to KR1020140083705A priority Critical patent/KR20160004766A/en
Publication of KR20160004766A publication Critical patent/KR20160004766A/en

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Abstract

The present invention relates to a stent for embolizing cerebral aneurysm, which can block separation of a coil inserted in the cerebral aneurysm formed on the branched blood vessel portion with a single stent. Accordingly, the present invention, regarding a stent for embolizing cerebral aneurysm, comprises: a tube-shaped main body formed with a net structure; a blockage net formed on one end unit of the main body, and formed with a fixed mesh pattern so as to block the separation of the coil filled in arteries formed on a position branched from the parent blood vessel.

Description

Stent for Cerebral Aneurysm

The present invention relates to a stent for an aneurysmal embolization, and more particularly, to a stent for an aneurysm of the aneurysm that can prevent the coil from being dislodged into a cerebral aneurysm formed in a divergent blood vessel site.

As is well known, the aneurysm of the cerebral artery is a condition in which the weak part of the blood vessel wall is enlarged and swollen like an acute angle, and the vessel wall may burst without warning.

The treatment of cerebral aneurysm is largely divided into aneurysm ligation and intravascular coil embolization.

First, the aneurysm of the aneurysm is a traditional surgical procedure performed by a neurosurgeon. It removes the skull piece, secures the aneurysm located between the brain tissues, ligates the origin with a small clip, , Tie up the blood vessels or tighten one part).

However, if it is impossible to completely ligate if the position is bad or the shape is bad, the remaining part is covered with special gauze so that the operation is performed so that even if bleeding occurs,

Subsequently, recent striking developments in intravascular coil embolization are performed by inserting a microconduit into an aneurysm, through which a normal blood vessel is not invaded, and a coil is filled so that only aneurysm is occluded.

Korean Patent Laid-Open Publication No. 2011-0092206 (Aug. 17, 2011) discloses a method for manufacturing an embolization coil for embolization and an induction coil for forming embolization as a conventional technique of the coil described above.

In addition, the intravascular coil embolization further includes a step of installing a stent in the blood vessel so as to prevent the coil filled in the aneurysm from falling out. As a conventional technique of such a stent, Korean Patent Laid-Open Publication No. 2013-0126641 (2013.11.20) Patent No. 2012-0044928 " Vascular stent for an aneurysm, " and the like.

However, in the above-described conventional technique, two stents 10a and 10b are used as shown in Fig. 1 in order to prevent separation of the coil filled in the aneurysm 4 formed at the position where the aneurysm 4 is divided at both sides in the parent blood vessel 1 The treatment process is complicated and the treatment time is long.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stent for a cerebral aneurysm embolization which can block a deviation of a coil filled in an aneurysm formed at a branching position in a maternal blood vessel with a single stent. .

In order to achieve the above object, the present invention provides a stent for an aneurysm of cerebral artery embolization, comprising: a tubular main body having a net structure; a main body formed at one end of the main body to separate a coil filled in an aneurysm, And a blocking network made up of a predetermined mesh pattern for blocking.

The shielding network of the present invention preferably includes a contact network contacting the periphery of the entrance of the aneurysm, and a connection network connecting the contact network with one end of the main body.

At this time, the contact network may be formed flat or may be curved inwardly or outwardly.

The contact network may have an outer diameter larger than the outer diameter of the body, and the contact network may be flat or protruded inwardly or outwardly curved.

On the other hand, the main body and the shielding net of the present invention are formed by weaving with one or two or more shape memory alloy wires and joining their ends.

On the other hand, the main body and the shielding net can be formed by machining a single shape memory alloy plate material.

On the other hand, the main body may block the escape of the coil filled in the other aneurysm formed in the mother blood vessel.

According to the present invention, which is implemented by the above-described means, since the coil filled in the aneurysm formed between the mother blood vessel and the branch blood vessel is blocked by a single stent, the treatment time can be shortened due to the simplification of the treatment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary view showing a conventional stent and its installation state. FIG.
2 and 3 are a perspective view and a front view, respectively, according to an embodiment of the present invention.
4 is a use state diagram according to an embodiment of the present invention.
FIG. 5 and FIG. 6 are a front view and a use state view of a blocking network according to a second embodiment of the present invention. FIG.
FIG. 7 and FIG. 8 are a front view and a use state view of a blocking network according to the third embodiment of the present invention. FIG.
9 and 10 are a front view and a use state view of a blocking network according to a fourth embodiment of the present invention.
11 and 12 are a front view and a use state view of a blocking network according to the fifth embodiment of the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below.

The present embodiments are provided to enable those skilled in the art to more fully understand the present invention.

Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals.

Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

Hereinafter, the structure of a stent for aneurysmal cerebral artery according to the present invention will be described in detail with reference to the accompanying drawings.

The stent for cerebral aneurysm embolization (100) of the present invention comprises a tubular main body (110) having a net structure, an aneurysm (4) connected to one end of the main body (110) (Not shown) filled in the shielding net 120. The shielding mesh 120 is formed of a predetermined mesh pattern.

2 and 3, the main body 110 is made of a shape memory alloy material having a function of elastic recovery. It is preferable to form a single wire by spirally winding or two or more wires spirally wound to form a tubular body whose circumference is round and hollow.

Here, when the main body 110 is formed by two wires, as shown in FIG. 2, a left-side helical coil 111 wound in a left-hand helix and a right-hand helical coil 112 wound in a right- Woven structure.

Alternatively, the main body 110 may be formed into a net shape by processing a plate or tube made of a shape memory alloy material by laser cutting.

The shielding net 120 is formed of a mesh pattern and is connected to one end of the main body 110. The shielding net 120 is formed by wires of the same shape memory alloy material as that of the main body 110 The shielding net 120 is connected to a wire forming the main body 110 and is formed in a mesh pattern having the same or similar shape as the mesh of the main body 110.

Alternatively, the shielding net 120 may be formed by a wire having a diameter different from that of the wire forming the main body 110, and may be connected to one end of the main body 110 in a joined manner.

Alternatively, the shielding net 120 may be formed by machining a plate made of a shape memory alloy material by laser cutting to form a mesh pattern. At this time, the shielding net 120 may be formed integrally with the body 110, And may be connected to one end of the main body 110 in a joined state.

The first embodiment of the above-described blocking net 120 includes a contact network 122 that contacts the periphery 6 of the open mouth 5 of the aneurysm 4, a contact network 122 and one end of the main body 110, (Not shown). The contact network 122 is brought into contact with the periphery 6 of the open mouth 5 of the aneurysm 4, i.e. the periphery 6 of the inlet 5 into which the coil is inserted into the aneurysm 4, The contact network 122 is formed in a flat plane as shown in Fig.

The connection network 124 connects the contact network 112 and one end of the main body 110 with a curved surface. The connection network 124 is formed by connecting the periphery of the contact network 122 and the main body 110, And the other end is curved.

FIG. 4 is a view showing a state of use of the stent for aneurysmal cerebral artery embolization according to an embodiment of the present invention. When the stent 110 is further attached, the branching vein 2 (3) The aneurysm 4 is formed at the position of the aneurysm 4 and the aneurysm 4 is filled with the aneurysm 4 to block the departure of the coil.

4, the main body 110 formed of the shape memory alloy material is supported by the blood vessel walls of the mother blood vessel 1 due to the elastic restoring force characteristic of the material and does not flow to the left and right, The aneurysm 4 contacts the periphery 6 of the entrance 5 of the aneurysm 4 to block the escape of the coil filled in the aneurysm 4 and the connection network 124 is formed curved so that the damage caused by the friction of the blood vessel wall .

Here, it is preferable that the contact network 122 is formed in a flat plane so that it is used in a general case where the periphery 6 of the entrance 5 of the aneurysm 4 is flat as shown in FIG.

In addition, the main body 110 of the present invention can block the entrance 5a of the other aneurysm 4a formed in the parent blood vessel 1 as shown in FIG.

5 is a front view of a second embodiment of the blocking net 120 of the present invention in which a second embodiment of the blocking net 120 is shown in the vicinity of the open mouth 5 of the aneurysm 4 The contact network 122a includes a contact network 122a and a connection network 124a connecting the contact network 122a and one end of the body 110 to each other through a curved surface. The contact network 122a protrudes outwardly curvedly.

The contact network 122a is a network that contacts the periphery 6 of the open mouth 5 of the aneurysm 4 and blocks the coil from leaving the entrance, And protrudes outwardly curved.

In FIG. 5, the contact network 122a is formed to protrude outwardly in a gently curved shape. However, if necessary, the contact network 122a may be formed to protrude outwardly.

The connection network 122a connects the periphery of the contact network 122a and one end of the main body 110 in a curved manner as shown in FIG.

Accordingly, the curvatures of the curved surfaces of the contact network 122a and the connection network 124a are continuous.

FIG. 6 is a view showing the use state of the second embodiment by the blocking net 120 of the present invention. When the branched blood vessels 2 and 3 are separated from each other in the mother blood vessel 1, Fig. 5 is a view showing the use state in which the aneurysm 4 is formed and the aneurysm 4 is installed to block the escape of the coil filled in the aneurysm 4. Fig.

6, the main body formed of the shape memory alloy material is supported by the blood vessel walls of the mother blood vessel 1 due to the elastic restoring force characteristic of the material and does not flow to the left and right. And the connection network 124a is curved so as to prevent damage due to friction of the blood vessel wall when the blood vessel is installed in the blood vessel.

Here, it is preferable that the contact network 122a is used to protrude outwardly curved so as to secure a larger inner diameter of the blood vessel in the vicinity of the inlet 5 of the aneurysm 4 as shown in Fig.

7 is a front view of a third embodiment of the blocking net 120 of the present invention in which a third embodiment of the blocking net 120 is shown around the open mouth 5 of the aneurysm 4, A contact network 122b contacting the contact network 122b and a connection network 124b connecting the contact network 122b and one end of the main body 110 in a curved shape. The contact network 122b is curved inwardly.

The contact network 122b is a network that contacts the periphery 6 of the open mouth 5 of the aneurysm 4 and blocks the coil from escaping through the inlet 5, And curved inward as shown in FIG.

In Fig. 7, the contact nib 122b is formed into a shape that smoothly curves inwardly. However, if necessary, the contact nib 122b can be formed into a shape that rapidly enters inwardly.

The connection network 124b connects the periphery of the contact network 122b and one end of the main body 110 in a curved manner as shown in FIG.

Accordingly, the curvature of the curved surfaces of the contact network 122b and the connection network 124b becomes continuous.

FIG. 8 is a view showing the use state of the third embodiment by the shielding net 120 of the present invention. When the branching blood vessel 2 is divided into two parts in the mother blood vessel 1, Is formed in the aneurysmal aneurysm 4 and the aneurysm 4 is filled with the coils.

8, the main body formed of the shape memory alloy material is supported by the blood vessel wall of the mother blood vessel 1 due to the elastic recovery force, which is a characteristic of the material, and does not flow to the left and right. And the connection network 124b is curved to prevent damage due to friction of the blood vessel wall when the blood vessel wall is installed in the blood vessel.

Here, the contact network 122b is formed to be curved inward and used when it is necessary to fill more coils into the aneurysm at the periphery 6 of the entrance 5 of the aneurysm 4 as shown in Fig. 8 desirable.

9 is a front view of a fourth embodiment of the blocking net 120 of the present invention in which a fourth embodiment of the blocking net 120 is shown around the open mouth 5 of the aneurysm 4 The contact network 122c includes a contact network 122c contacting the contact network 122c and a connection network 124c connecting the contact network 122c and one end of the body 110 in a curved shape. And is formed with a larger outer diameter d2.

The contact network 122c is a network that contacts the periphery 6 of the open mouth 5 of the aneurysm 4 and blocks the coil from escaping through the inlet 5, The outer diameter d2 of the main body 110 is larger than the outer diameter d1 of the main body 110 as shown in FIG.

The connection network 124c connects the periphery of the contact network 122c and one end of the main body 110 in a curved manner as shown in FIG.

Accordingly, the curvature of the curved surface of the contact network 122c and the curved surface of the connection network 124c is continuous.

FIG. 10 is a view showing the use state of the fourth embodiment by the shielding net 120 of the present invention. When the branching vein 2 and the branching vein 2 are separated from each other in the mother blood vessel 1, Fig. 5 is a view showing the use state in which the aneurysm 4 is formed and the aneurysm 4 is installed to block the escape of the coil filled in the aneurysm 4. Fig.

10, the main body 110 formed of the shape memory alloy material is supported by the blood vessel wall of the mother blood vessel 1 due to the elastic restoring force characteristic of the material and does not flow to the left and right, and the contact nail 122c The aneurysm 4 contacts the periphery 6 of the entrance 5 of the aneurysm 4 to block the release of the coil filled in the aneurysm 4 and the connection network 124c is curved to prevent damage due to friction of the blood vessel wall .

The contact network 122c is formed to have an outer diameter d2 larger than the outer diameter d1 of the main body 110 so that the entrance 5 of the aneurysm 4 is larger than the outer diameter of the main body 110 It is preferable to be used when it is wider than the inner diameter of the parent blood vessel 1.

11 is a front view of a fifth embodiment of the blocking net 120 of the present invention in which a fifth embodiment of the blocking net 120 is shown around the open mouth 5 of the aneurysm 4 A contact network 122d contacting the contact network 122d and a connection network 124d connecting the contact network 122d and one end of the main body 110 in a curved shape. The contact network 122d includes an outer diameter d1 of the main body 110, And is outwardly curved so as to have a larger outer diameter d3.

The contact network 122d contacts the periphery of the open mouth 5 of the aneurysm 4 and blocks the coil from being released to the entrance. The contact network 122d is connected to the main body 110 (D3) of the outer diameter (d1)

The connection network 124d connects the periphery of the contact network 122d and one end of the main body 110 in a curved manner as shown in FIG.

Accordingly, the curved surfaces of the contact network 122d and the connection network 124d are continuous.

FIG. 12 is a view showing the use state of the fifth embodiment by the shielding net 120 of the present invention. When the branching vein 2 and the branching vein 2 are separated from each other in the mother blood vessel 1, Fig. 5 is a view showing the use state in which the aneurysm 4 is formed and the aneurysm 4 is installed to block the escape of the coil filled in the aneurysm 4. Fig.

12, the main body 110 formed of the shape memory alloy material is supported by the blood vessel wall of the mother blood vessel 1 due to the elastic restoring force characteristic of the material and does not flow to the left and right, The aneurysm 4 contacts the periphery 6 of the entrance 5 of the aneurysm 4 to block the release of the coil filled in the aneurysm 4 and the connection network 124d is curved to prevent damage due to the friction of the blood vessel wall .

Although the contact network 122d has an outer diameter d3 larger than the outer diameter d1 of the main body 110 and protrudes outwardly curvedly as shown in Fig. 12, the entrance 5 of the aneurysm 4 is wide, 4 in the vicinity of the inlet 5 of the blood vessel 2 and a larger vessel inner diameter is required.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. You will understand.

It is obvious that the technical idea belongs to the invention if the practice of such improvement, change, substitution or addition is included in the scope of the following claims.

1: mother blood vessels 2, 3: branch vessel
4: Aneurysm 5: Entrance
6: peripheral 100: stent
110: main body 120:
122, 122a, 122b, 122c, 122d:
124, 124a, 124b, 124c, 124d:

Claims (14)

In a stent for an aneurysmal embolization,
A stent for aneurysm of the aneurysm of the cerebral artery, comprising a tubular body made of a mesh structure, a shielding mesh formed at one end of the main body and made of a predetermined mesh pattern to block the escape of a coil filled in an aneurysm formed at a position branched from the mother blood vessel. . The method according to claim 1,
Wherein the obstruction network includes a contact network contacting the periphery of the entrance of the aneurysm, and a connection network connecting the contact network with one end of the body through a curved surface. The method of claim 2,
Wherein the contact network is flattened. The method of claim 2,
Wherein the contact network protrudes outwardly curvedly. The method of claim 2,
Wherein the contact network protrudes inwardly curved. The method of claim 2,
Wherein the contact network has an outer diameter larger than the outer diameter of the main body. The method of claim 6,
Wherein the contact network is flattened. The method of claim 6,
Wherein the contact network protrudes outwardly curvedly. The method of claim 6,
Wherein the contact network protrudes outwardly curvedly. The method according to claim 1,
Wherein the body and the shielding net are woven with a single shape memory alloy wire or two or more shape memory alloy wires. The method according to claim 1,
Wherein the main body and the shielding net are respectively woven and bonded by shape memory alloy wires. The method according to claim 1,
Wherein the main body and the shielding net are formed by machining a single shape memory alloy plate. The method according to claim 1,
Wherein the main body and the shielding net are formed by joining together the shape memory alloy plate members. The method according to claim 1,
Wherein the main body blocks the escape of the coil filled in the other aneurysm formed in the mother blood vessel.
KR1020140083705A 2014-07-04 2014-07-04 Stent for cerebral aneurysm KR20160004766A (en)

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KR1020140083705A KR20160004766A (en) 2014-07-04 2014-07-04 Stent for cerebral aneurysm

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200121637A (en) * 2019-04-16 2020-10-26 주식회사 에스앤지바이오텍 Cerebral aneurysm stent and manufacturing method thereof
CN115363676A (en) * 2022-10-27 2022-11-22 北京华脉泰科医疗器械股份有限公司 Stackable released intratumoral sealing stent and conveying method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200121637A (en) * 2019-04-16 2020-10-26 주식회사 에스앤지바이오텍 Cerebral aneurysm stent and manufacturing method thereof
CN115363676A (en) * 2022-10-27 2022-11-22 北京华脉泰科医疗器械股份有限公司 Stackable released intratumoral sealing stent and conveying method thereof
CN115363676B (en) * 2022-10-27 2023-04-25 北京华脉泰科医疗器械股份有限公司 Stackable released intratumoral sealing stent

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