KR102247433B1 - Basket stent for blood clots removal - Google Patents

Abstract

The thrombus removal basket stent of the present invention has one side connected to the front end of the push wire, and is disposed at a predetermined distance apart from each other so that the blood clots accumulated inside the blood vessel are collected inside the thrombus removal basket stent, and are arranged away from the push wire. A plurality of stent wires including the other side extending in an expanded shape; A support having one end connected to one of the plurality of stent wires and the other end connected to a stent wire different from the stent wire connected to one end; And a basket in which the front end is closed and the rear end is opened to form an opening, and the other side of the stent wire is connected to the opening.

Description

Basket stent for blood clot removal {BASKET STENT FOR BLOOD CLOTS REMOVAL}

The present invention relates to a basket stent for removing blood clots, and more particularly, to a basket stent for removing blood clots that collects blood clots into a space inside the stent wire and removes blood clots bitten between the stent wires.

In recent years, in the treatment of acute stroke, intraarterial thrombectomy has become an important treatment. The development of stent-type thrombectomy devices played a big role in the rapid development of intraarterial thrombectomy. This stent-type blood clot removal device is a technology that allows the stent-type device to be in close contact with a blood clot to bite the blood clot between the wires of the stent, and then remove the stent from the body while removing the blood clot bitten between the wires of the stent. to be.

However, in actual clinical practice, when a blood clot is removed using a stent, the clot may bite into the stent, but the clot cannot enter the stent, so the clot may fall out of the stent in the process of removing the stent. Because it is not easily bitten by the stent, the efficiency of removing blood clots is also very poor.

This is basically a problem caused by the dense structure of the lattice structure formed between the wires constituting the conventional stent-type device. When the stent is unfolded, the blood clot is bitten between the outside of the stent and the blood vessel, so that a significant portion of the blood clot is located on the outside of the stent. It is done. For this reason, the blood clot may fall easily during the removal of the stent, and if the blood clot is hard, it is difficult to be bitten by the stent.

In addition, current stent-type devices make the stent large and long in order not to miss the blood clot, so the area in contact with the blood vessel is large. For this reason, in the process of installing and removing the stent, the inner wall of the blood vessel may be damaged.

In addition, since the stent-type devices are of a closed cell type, there is a problem in that the blood clots cannot be bitten well because the stent does not adhere to the curved surface of the blood vessel when the blood vessel is severely curved.

Korean Patent Registration No. 10-1912537

The technical problem of the present invention is conceived in this respect, and an object of the present invention is to provide a stent wire extending at various angles from the push wire to facilitate close contact with the inner wall of the blood vessel, and to easily collect blood clots from the inside of the blood vessel to the stent wire. It is to provide a basket stent for removing blood clots that can be done.

In addition, an object of the present invention is to provide a basket stent for removing blood clots including a support for supporting the stent wire so that the stent wire is in close contact with the inner wall of the blood vessel easily.

The thrombus removal basket stent for collecting blood clots accumulated inside the blood vessel by moving inside the catheter connected to the push wire according to the embodiment of the present invention and being exposed from the catheter through the retraction drive of the catheter is the push One side is connected to the tip of the wire, and the other side extending in a shape that is spaced apart from each other at a predetermined interval so that the blood clots accumulated inside the blood vessel are collected into the inside of the clot removal basket stent, and extends in a direction away from the push wire A plurality of stent wires comprising a; A support having one end connected to one of the plurality of stent wires, and the other end connected to a stent wire different from the stent wire to which the end is connected; And a basket in which the front end is closed and the rear end is opened to form an opening, and the other side of the stent wire is connected to the opening.

In addition, the basket may further include a ring-shaped brace for supporting the opening to maintain an open state.

In addition, the stent wire may introduce the blood clots accumulated inside the blood vessel when it is expanded, and transfer the blood clots that have flowed inward to the basket according to the retraction driving of the push wire.

In addition, the basket may have a width of 25 μm to 30 μm in the width of each hole formed in the net shape to pass the blood cell component in the blood vessel and selectively collect a thrombus having a size larger than that of the blood cell.

In addition, the support, when the stent wire extends to the inner wall of the blood vessel, an auxiliary support for supporting the stent wire to be in close contact with the blood vessel; may further include.

In addition, when the plurality of stent wires are composed of a pair of stent wires, a pair of stent wires extending from one side are disposed on the same virtual plane to form a predetermined central angle and extend in a form that extends. have.

In addition, when the stent wire is elongated from the one side to a length in contact with a virtual extension line horizontal to the outer peripheral surface of the basket, the extending direction is changed to be parallel to a virtual extension line horizontal to the outer peripheral surface of the basket. The other side may be connected to the opening of the basket.

In addition, the support is composed of a pair of supports, and is arranged in a shape symmetrical to the shape formed by the pair of stent wires on a virtual plane on which the pair of stent wires are arranged, and can be connected to the stent wire. have.

In addition, when the plurality of stent wires are composed of two pairs of stent wires, a pair of stent wires extending from one side are arranged on the same virtual plane to form a predetermined central angle and extend in a form , Another pair of stent wires may be disposed on the same virtual plane orthogonal to the one plane to form a predetermined central angle and extend in a form of expansion.

In addition, the support is composed of two pairs of supports, and the two pairs of stent wires are arranged in a shape symmetrical to the shape formed by the two pairs of stent wires on a virtual plane, respectively, to be connected to the stent wire. I can.

The basket stent for removing blood clots according to the present invention has the advantage of being able to collect large blood clots more easily than a conventional stent composed of a plurality of wires such that a minimum stent wire is connected to the basket, forming a tight gap.

In addition, the basket stent for blood clot removal according to the present invention includes a ring-shaped orthosis device at the entrance of the basket, and the deformation of the basket opening is prevented by the tension applied to the stent wire connected to the basket. It can be easily transferred to the basket by retracting drive.

In addition, the basket stent for removing blood clots according to the present invention can minimize deformation due to pressure applied by blood cells or plasma flowing inside the blood vessel through the support for supporting the stent wire.

1 is a schematic diagram of a catheter including a basket stent for removing blood clots according to an embodiment of the present invention.
2 is a perspective view of a basket stent for removing blood clots according to an embodiment of the present invention.
3 to 6 show examples of supports having different structures.
7 is a perspective view of a basket stent for removing blood clots according to another embodiment of the present invention.
8A to 8C are views for explaining a process of removing a thrombus using the basket stent for thrombus removal according to the present invention.

For a detailed description of the present invention to be described later, reference is made to the accompanying drawings, which illustrate specific embodiments in which the present invention may be practiced. These embodiments are described in detail sufficient to enable a person skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different from each other, but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention in relation to one embodiment. In addition, it should be understood that the location or arrangement of individual components in each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description to be described below is not intended to be taken in a limiting sense, and the scope of the present invention, if appropriately described, is limited only by the appended claims, along with all ranges equivalent to those claimed by the claims. Like reference numerals in the drawings refer to the same or similar functions over several aspects.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the drawings.

The basket stent for removing blood clots according to the present invention has the advantage of being able to collect large blood clots more easily than a conventional stent composed of a plurality of wires such that a minimum stent wire is connected to the basket, forming a tight gap.

In addition, the basket stent for blood clot removal according to the present invention is connected to a push wire, moves inside the catheter inserted into the blood vessel, and is exposed from the catheter through the drive of the push wire to collect blood clots accumulated inside the blood vessel.

1 is a schematic diagram of a catheter including a basket stent for removing blood clots according to an embodiment of the present invention, and FIG. 2 is a perspective view of a basket stent for removing blood clots according to an embodiment of the present invention.

1 and 2, a basket stent 1 for removing blood clots according to an embodiment of the present invention includes a stent wire 11, a support 13, and a basket 15.

One side of the stent wire 11 may be connected to the front end of the push wire P. The stent wire 11 is connected to the push wire P and may move forward or backward according to the driving of the push wire P. In addition, the stent wire 11 may be expanded when exposed from the catheter (C) through the forward driving of the push wire (P).

The stent wire 11 may be spaced apart from each other at predetermined intervals so that the blood clots accumulated inside the blood vessel are collected into the inside of the basket stent 1 for removing blood clots. The spaced apart intervals between the plurality of stent wires 11 may be the same or different intervals.

The stent wire 11 may include the other side extending in a direction away from the push wire P. Each other side of the stent wire 11 away from the push wire P may be elongated in various forms. In detail, each other side of the stent wire 11 may be extended on the same plane. In this case, each other side may be elongated in a symmetrical or asymmetrical shape with respect to the push wire (P). In detail, as shown in FIG. 2, a pair of stent wires 11 may be stretched on the same plane, and each other side is stretched in a symmetrical shape such as an angle extending from the push wire P, an inflection point, etc., and the basket 15 Can be connected with.

In particular, the basket stent 1 for removing blood clots from the other side of the stent wire 11 can be easily recovered to the catheter C through an area extending from the push wire P.

In addition, each other side of the stent wire 11 may be elongated on a different plane. Specifically, when three or more stent wires 11 are connected to the basket 15, the other side of each stent wire may be disposed on a different plane or the other side of some stent wires may be selectively disposed on the same plane. Through this, it is possible to adjust the spaced distance between each stent wire.

The stent wire 11 may introduce blood clots accumulated inside the blood vessel into the inner space during expansion. The stent wire 11 may transfer the blood clots introduced into the inside according to the retraction driving of the push wire P to the basket 15.

In detail, the stent wire 11 may be expanded so as to be in close contact with the blood vessel wall to form an inner space, and a blood clot may flow into the formed inner space. The stent wire 11 may extend in a direction in which the blood clot is not located. After the stent wire 11 is expanded, the operator can rotate the push wire P to introduce the blood clot into the inner space of the stent wire 11.

Meanwhile, a plurality of stent wires may be provided in an even number and disposed at positions symmetrical to each other. For example, the plurality of stent wires may be composed of a pair of stent wires. In this case, a pair of stent wires extending from one side may be disposed on the same virtual plane to form a predetermined central angle and extend in a form of expansion. In this case, the support may be composed of a pair of interconnected supports or a single support made of flexible material. The support may be arranged in a shape symmetrical to a shape formed by a pair of stent wires on an imaginary plane on which a pair of stent wires are disposed, and may be connected to the stent wire.

As another example, when composed of two pairs of stent wires, a pair of stent wires extending from one side may be disposed on the same virtual plane to form a predetermined central angle and extended in a form. At the same time, another pair of stent wires may be disposed on the same virtual plane orthogonal to one plane to form a predetermined central angle and extend in a form that expands. In this case, the support may be configured in a form in which two pairs of supports for supporting each of the two pairs of stent wires or two wires for supporting the pair of wires support the two pairs of stent wires. The support can be connected to the stent wire by being disposed in a shape symmetrical to the shape formed by the two pairs of stent wires on a virtual plane in which the two pairs of stent wires are respectively disposed. A detailed description related to the embodiment will be described in detail with reference to FIG. 6 below.

When the stent wire 11 is extended from one side to a length in contact with the outer circumferential surface of the basket 15 on a horizontal imaginary extension line, the direction in which the stent wire 11 is stretched is parallel to the imaginary extension line horizontal with the outer circumferential surface of the basket 15 Can be changed. Through this, the other side may be connected to the opening of the basket 15.

Meanwhile, the length from the point where the push wire P and the stent wire 11 are connected to the closed tip of the basket 15 may have a length of 20 mm or more. That is, the basket 15 is formed in a structure having a length three times or more than the diameter of the expanded state, so that the stent wire 11 does not have to move a large distance forward or backward according to the location of the blood clot located inside the blood vessel. Through this, the convenience of the operator can be improved. In addition, the stent wire 11 having a relatively longer length than the basket 15 can easily guide the movement of the blood clot into the basket 15.

In detail, the stent wire 11 may be separated into a region in which an inner region is extended so as to have a constant inclination by extending from the push wire P and a region in which the other side is kept flat so that the inner region maintains a constant area. That is, as shown in FIG. 2, the stent wire 11 extends to a region connected to the support 13 while forming a constant inclination, and then extends to the basket 15 in a flat shape without forming an inclination. In addition, although not shown, the stent wire 11 includes a flexible material and may be curved according to the shape of the inner wall of the blood vessel when in close contact with the blood vessel.

One end of the support 13 may be connected to one of the plurality of stent wires 11. The other end of the support 13 may be connected to a stent wire different from the stent wire to which one end is connected.

In detail, the support 13 may be connected to stent wires having different one end and the other end. When the single support 13 is connected to each stent wire 11, the support 13 includes an elastic material, and when the basket stent 1 for removing blood clots is exposed from the catheter C, the stent wire 11 Can be expanded. In addition, the stent wire 11 may be in close contact with the inner wall of the blood vessel through the elasticity of the support 13.

When the stent wire 11 extends to the inner wall of the blood vessel, the support 13 may further include an auxiliary support for supporting the stent wire 11 to be in close contact with the blood vessel.

In detail, the auxiliary support may be connected to the support 13 to support the stent wire 11. In addition, the auxiliary support may be directly connected to the stent wire 11, and may support the expanded stent wire 11 so as to be in close contact with the blood vessel wall. A description of the auxiliary support will be described in detail with reference to FIG. 3 below.

On the other hand, the support 13 may include a shape memory material.

In detail, the support 13 may include a material such as nitinol, and when exposed to body temperature in blood vessels or to liquids such as blood, the stent wire 11 may be restored to an initially memorized shape to expand the stent wire 11. . The stent wire 11 extended by the support 13 may introduce blood clots accumulated inside the blood vessel into the inner space.

The basket 15 may be in the form of a net forming an opening in which the front end is closed and the rear end is open. The basket 15 may be connected to the other side of the stent wire 11 and the opening. The closed tip of the basket 15 may be in various shapes such as streamlined, vertical, and cylindrical, and a basket 15 of a different shape may be applied depending on the type and size of the blood vessel to which the basket stent 1 for removing blood clots is exposed. have.

In detail, the basket 15 may contain a blood clot transmitted from the stent wire 11 through the opening, and the tip opposite to the opening may be closed to prevent the blood clot from being separated. The basket 15 may maintain the shape of the opening in an open shape even when the stent wire 11 is deformed.

The basket 15 may further include a ring-shaped brace 151 for supporting the opening to be maintained in an open state.

In detail, the ring-shaped orthosis 151 may support the basket 15 so that the opening is maintained at a predetermined size or more. The ring-shaped orthosis 151 is made of an elastic material having an elastic modulus that can allow an external force applied to the stent wire 11 to maintain the shape of the opening of the basket 15 in an open shape. In addition, when the basket stent 1 for removing blood clots is inserted into the catheter, the ring-shaped orthosis 151 is contracted to be smaller than the diameter of the catheter C to prevent separation of the blood clots stored inside the basket 15. .

In detail, the ring-shaped orthosis 151 may be located inside the basket 15. In more detail, the ring-shaped orthosis 151 may be disposed in the direction of the opening with respect to the center of the basket 15 or may be positioned in the direction of the closed tip. This may be understood as a characteristic for smoothly connecting the stent wire 11 and the basket 15.

On the other hand, the ring-shaped orthosis 151 may be contracted or expanded inside the basket 15, and through this, the contraction or expansion of the basket 15 may be assisted.

That is, as the ring-shaped orthosis 151 is located inside the basket 15, the stent wire 11 connected to the inside of the basket 15 may form an obtuse angle larger than a right angle. Through this, the opening of the basket 15 connected to the stent wire 11 forming an obtuse angle can be bent in the direction of the stent wire 11 as shown in FIG. 2, and through this deformation, the blood clot is stored inside the blood clot. When the removal basket stent 1 is recovered, it can be easily withdrawn to the outside without damaging the vessel wall.

In addition, it is possible to adjust the shape in which the basket is expanded by contracting or expanding to different degrees in a state in which a plurality of ring-shaped orthosis units are disposed inside the basket. In this case, multiple invasions are not required to collect a plurality of blood clots, and a ring-shaped orthosis disposed on the closed tip side is selectively closed to form a plurality of spaces inside the basket.

In detail, when three ring-type orthosis devices are arranged in the direction of the closed tip from the opening of the basket, after collecting one thrombus, the ring-type orthosis device closest to the closed tip is selectively contracted to store the blood clot. Thereafter, when additional blood clots are collected, a partial area of the basket is closed by the contraction of the ring-shaped orthosis placed in the center, so that two blood clots can be collected. As the ring-shaped orthosis contracts, it is possible to continuously collect a plurality of blood clots even in a single invasion.

To this end, the ring-shaped brace can maintain a different shape according to temperature, including a shape memory material as needed. In addition, when a plurality of ring-type braces are arranged, each of the ring-type braces is connected to the stent wire and can be individually contracted or expanded.

Meanwhile, similarly, the stent wire 11 may be disposed to the inside of the basket 1 even when the ring-shaped orthosis is not disposed.

The basket 15 has a width of 25 μm to 30 μm in each hole formed in a net shape, so that the blood cell components in the blood vessels pass through and a thrombus having a size larger than that of the blood cells can be selectively collected.

In detail, the basket 15 may have a hole formed in order to circulate blood, blood cells, and the like, and may selectively accommodate a thrombus having a larger size. In general, blood cells mean cells floating in blood, and can be classified into platelets, red blood cells, and white blood cells. These blood cells have different sizes on average, the average size of platelets is 2 to 3 μm, and the size of red blood cells is about 7 μm. Leukocytes are classified into various types and have a diameter of about 12 to 25 μm. Accordingly, the width of the hole formed in the basket 15 may be formed to be 25 μm to 30 μm in order to smoothly flow white blood cells.

On the other hand, as described above, the size of the hole formed in the basket 15 is only an example, and the basket 15 having different holes may be combined according to the design modification of the basket stent 1 for removing blood clots according to the present invention. The size of the hole can be applied in a variety of sizes from micrometer units to millimeter units from 25 μm to 2 mm.

In this way, the basket 15 in which the hole is formed may be recovered with the catheter C in a state in which the blood clots transferred from the stent wire 11 are collected. The collected thrombus may be a thrombus having a size larger than that of the blood cell, and the thrombus having a size similar to the size of the blood cell may be moved to the blood vessel through a hole in the basket. Meanwhile, in order to selectively permeate only blood components, the basket 15 may further include components such as a semi-permeable membrane.

On the other hand, the basket 15 may have a diameter of 3mm to 6mm when expanded in a state inserted into a cerebrovascular vessel. In detail, the basket 15 may be expanded to the same size as the inner diameter of the blood vessel by contacting the inner wall of the blood vessel, which may be fluidly changed according to the inner diameter of the inserted blood vessel.

3 to 6 show examples of supports having different structures.

3 shows an example in which the support 131 is arranged to face the stent wire 11, and in this embodiment, the angle formed toward the push wire P of the support 131 is the stent wire 11 ) And may change depending on the location connected to it. That is, the support 13 may maintain a central angle in order to maintain a symmetrical shape with the stent wire 11 forming a central angle (A) from the push wire (P), respectively, but the stent wire 11 and The size of the central angle may be reduced or improved according to the location to be connected or the size of the central angle A formed between the stent wires 11.

Referring to FIG. 4, an auxiliary support 131 connected to the support 13 may support the stent wire 11. The auxiliary support 131 may be connected to the support 13 by changing the number, size, and inclination of the stent wire 11 according to the elongated length. In addition, the auxiliary support 131 may include a shape memory material. On the other hand, when the auxiliary support 131 is directly coupled to the support 13 as shown in FIG. 4, a pin coupling using a fixing pin may be formed at the connection portion.

On the other hand, the auxiliary support 131 may be connected to the stent wire 11 without being connected to the support 13 to support the stent wire 11. In this case, the auxiliary support 131 can be independently driven without being affected by the driving of the support 13, and presses the stent wire 11 to the blood vessel wall, and assists it when the stent wire 11 is contracted. I can.

5 shows an example in which a support is added in a horizontal direction with the push wire P.

Referring to FIG. 5, a support 13 extending in a horizontal direction from the push wire P may be added to the support 13 that is bent in a direction opposite to the stent wire 11. The support 13 extending in the horizontal direction may be coupled to the inverted support 13 in various ways. In particular, it may be coupled using a fixing pin, and in this case, when the basket stent for removing blood clots is recovered inside the catheter, it is possible to assist the contraction of the stent wire 11 by inducing the folding of the bent support 13 .

6 shows an example of a support in which a number of inflection points are formed.

Referring to FIG. 6, the support 13 may have a plurality of inflection points. The support 13 in which a number of inflection points are formed is the stent wire 11 even at a relatively high pressure by distributing the force transmitted by the pressure applied to the stent wire 11 through distribution of blood and plasma in the blood vessel. Can maintain the unfolded shape. In addition, the support 13 in which a plurality of inflection points are formed may be connected to the auxiliary support through several points, through which the stability of the stent wire 11 may be improved.

Examples of the support and auxiliary support shown in FIGS. 3 to 6 may be applied by mixing the stent wire according to the elongated length and design deformation, and in addition to the illustrated example, various types of support or auxiliary support may support the stent wire. I can.

7 is a perspective view of a basket stent for removing blood clots according to another embodiment of the present invention.

Referring to FIG. 7, in the basket stent 2 for removing blood clots according to another embodiment of the present invention, two pairs of stent wires 21 may be extended from the push wire P to be connected to the basket 25. In addition, a plurality of supports 23 may be connected to the other side of the two pairs of stent wires 21, respectively.

In detail, each stent wire 21 extending from the push wire P may be elongated in an extended form with a constant inclination. One pair of the plurality of stent wires 21 can be extended in a symmetrical shape while being positioned on the same virtual plane, and the other pair is positioned perpendicular to one plane or on another virtual plane having a predetermined inclination It can be elongated in a symmetrical shape. When one plane and the other plane are vertical, each stent wire 21 may be separated by the same distance, and if one plane and the other plane are not perpendicular, the distance between each stent wire 21 may be different. have. In addition, the form in which the support 23 is arranged may be modified according to the form in which the two pairs of stent wires 21 are elongated.

As such, the support 23 is arranged in a different shape according to the elongated shape of the stent wire 21 to prevent contraction of the stent wire 21 due to external pressure, and in the process of being recovered to the catheter, the stent wire 21 ) Can improve the convenience of operation by assisting the contraction.

8A to 8C are views for explaining a process of removing a thrombus using the basket stent for thrombus removal according to the present invention.

8A to 8C, a basket 15 for removing blood clots may be inserted into the catheter C inserted into the blood vessel. Thereafter, the basket 15 for removing the blood clot may be exposed to the outside of the catheter (C) by the retraction of the catheter (C) at the location where the blood clot was accumulated, and then pushed so that the blood clot is located around the stent wire (11). Wire (P) can be controlled.

Subsequently, the operator may control the push wire P so that the blood clot is located in the inner space of the stent wire 11. When the blood clot is located in the inner space of the stent wire 11, the push wire P is driven back to deliver the blood clot to the inside of the basket 15. In a state in which the blood clot is stored inside the basket 15, the operator can retract the push wire P to retrieve it inside the catheter C, and a basket stent for blood clot removal ( 1) can be recovered.

As such, the basket stent for removing blood clots according to the present invention includes a ring-shaped orthosis device at the entrance of the basket stent to prevent deformation of the basket opening by tension applied to the stent wire connected to the basket, so that the blood clots collected by the stent wire are push wire It can be easily transferred to the basket by the retraction drive of the.

In addition, the basket stent for removing blood clots according to the present invention can minimize deformation due to pressure applied by blood cells or plasma flowing inside a blood vessel through a support for supporting each stent wire.

Although the present invention has been described in detail through exemplary embodiments above, those of ordinary skill in the art to which the present invention pertains will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. will be. Therefore, the scope of the present invention is limited to the described embodiments and should not be defined, and should be determined by all changes or modifications derived from the claims and the concept of equality as well as the claims to be described later.

1, 2: basket stent for removing blood clots
11, 21: stent wire
13, 23: support
131: auxiliary support
15, 25: basket
151: ring type orthosis
C: catheter
P: push wire

Claims (10)

In the basket stent for blood clot removal, which is connected to a push wire and moves inside the catheter inserted into the blood vessel, and is exposed from the catheter through a retraction drive of the catheter to collect blood clots accumulated inside the blood vessel,
One side is connected to the tip of the push wire, and the blood clots accumulated inside the blood vessel are disposed to be spaced apart from each other at a predetermined interval so that the blood clots accumulated inside the blood clots are collected inside the basket stent, and are extended in a shape extending in a direction away from the push wire. A plurality of stent wires including the other side;
A support having one end connected to one of the plurality of stent wires, and the other end connected to a stent wire different from the stent wire to which the end is connected; And
Including; a basket in which the front end is closed and the rear end is opened to form an opening, and the other side of the stent wire and the basket are connected to each other, and
The plurality of stent wires,
In the case of consisting of a pair of stent wires, a pair of stent wires extending from one side are arranged on the same virtual plane to form a predetermined central angle with each other, and are extended in a form that extends,
The support,
A basket stent for blood clot removal consisting of a pair of supports, arranged in a shape symmetrical to the shape formed by the pair of stent wires on a virtual plane on which the pair of stent wires are arranged and connected to the stent wire .
The method of claim 1,
The basket,
A ring-shaped brace for supporting the opening to maintain an open state; further comprising, a basket stent for removing blood clots.
The method of claim 1,
The stent wire,
A basket stent for removing blood clots, which introduces the blood clots accumulated inside the blood vessel during expansion, and transfers the blood clots that have flowed inward to the basket according to the retraction drive of the push wire.
The method of claim 1,
The basket,
The width of each hole formed in the net shape is formed to have a size of 25 μm to 30 μm to pass the blood cell component in the blood vessel and selectively collect a blood clot having a size larger than that of the blood cell, a basket stent for blood clot removal.
The method of claim 1,
The support,
When the stent wire extends to the inner wall of the blood vessel, an auxiliary support for supporting the stent wire to be in close contact with the blood vessel; further comprising, a basket stent for removing blood clots.
delete The method of claim 1,
The stent wire,
When extending from the one side to a length in contact with the outer circumferential surface of the basket and on a horizontal virtual extension line, the direction of extension is changed to be parallel to the horizontal imaginary extension line and the outer circumferential surface of the basket, so that the other side is aligned with the opening of the basket. Attached, a basket stent for removing blood clots.
delete delete In the basket stent for blood clot removal, which is connected to a push wire and moves inside the catheter inserted into the blood vessel, and is exposed from the catheter through a retraction drive of the catheter to collect blood clots accumulated inside the blood vessel,
One side is connected to the tip of the push wire, and the blood clots accumulated inside the blood vessel are disposed to be spaced apart from each other at a predetermined interval so that the blood clots accumulated inside the blood clots are collected inside the basket stent, and are extended in a shape extending in a direction away from the push wire. A plurality of stent wires including the other side;
A support having one end connected to one of the plurality of stent wires, and the other end connected to a stent wire different from the stent wire to which the end is connected; And
Including; a basket in which the front end is closed and the rear end is opened to form an opening, and the other side of the stent wire and the basket are connected to each other, and
The plurality of stent wires,
In the case of consisting of two pairs of stent wires, a pair of stent wires extending from one side are arranged on the same virtual plane to form a predetermined central angle to each other and extend in a form that extends, and the other pair of stent wires is the same. Arranged on the same virtual plane orthogonal to one plane, they form a predetermined central angle and are extended in a form that expands,
The support,
A basket for removing blood clots, which is composed of two pairs of supports and is arranged in a shape symmetrical to the shape formed by the two pairs of stent wires on a virtual plane in which the two pairs of stent wires are respectively arranged and connected to the stent wires Stent.

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