KR20210049550A - Blood filter and device for removing thrombus - Google Patents

Abstract

A blood filter according to an embodiment includes: a filter portion for removing thrombus in the blood; a capturing portion connected to the filter portion and captured by a recovery member upon recovery of the filter portion; and a connecting portion connected between the filter portion and the capturing portion. The capturing portion may be provided in the form of a wire loop made of a flexible material, so the penetration of the capturing portion into the blood vessel wall may be prevented.

Description

Blood filter and blood clot removal device {BLOOD FILTER AND DEVICE FOR REMOVING THROMBUS}

A blood filter and a blood clot removal device are disclosed.

The inferior vena cava is the main stem of the largest vein in the human body's venous system. It collects blood from the veins from the lower body below the diaphragm and allows it to flow into the right atrium.

The inferior vena cava splits into the left common iliac vein and the right common iliac vein as it descends, and these common iliac veins are again divided into internal and external bone veins, respectively. That is, the external bone vein from the leg and the internal bone vein from the visceral, pelvis, and genitalia join to form the left and right common iliac veins, and they rejoin to become the main stem of the lower vena cava.

Meanwhile, the inferior vena cava filter is widely used in the medical field in recent years for the purpose of preventing fatal pulmonary embolism in patients with venous thrombosis. However, removing it at the right time is an important factor to reduce future complications (inferior vena cava obstruction, filter movement into the abdominal cavity).

The shape of the filter developed so far has been using a method of removing the ring provided at the top of the filter from the body by using a hook-shaped removal device. However, the disadvantage of this type is that when the filter is inclined at the time of insertion, penetrates the vein wall in the narrow inferior vena cava, or epithelialization occurs in the vein wall, the hook at the top of the filter is difficult to catch on the hook, so various more expensive and high-risk removal methods are used Became.

Korean patent registration KR10-1133157 discloses a'removable and recoverable embolic protection device and a filter assembly constituting the same.'

The above-described background technology is possessed or acquired by the inventor in the process of deriving the present invention, and is not necessarily a known technology disclosed to the general public prior to the filing of the present invention.

An object according to an embodiment is to provide a blood filter and a blood clot removal device that can be easily removed through the trapped portion because the trapped portion is provided in the form of a wire loop made of a flexible material to prevent penetration of the trapped portion into the blood vessel wall. .

An object according to an embodiment is a blood filter and a blood clot removal device that is located in the lumen of a blood vessel and can be easily removed through the capture portion even if the filter portion is tilted by a connection portion of a flexible material disposed between the filter portion and the capture portion. Is to provide.

An object according to an embodiment is to provide a blood filter and a blood clot removal device capable of preventing cardiovascular complications from being caused by preventing the upper end of the filter from being buried on a blood vessel wall.

An object according to an embodiment of the present invention is to provide a blood filter and a blood clot removal device that can be easily removed from a blood vessel by an irregularly shaped wire loop-shaped trapping portion and a hook-shaped collecting member.

The problems to be solved in the embodiments are not limited to the problems mentioned above, and other problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

A blood filter according to an embodiment for achieving the above object includes: a filter portion for removing blood clots in blood; A trapping portion connected to the filter portion and captured by a recovery member upon recovery of the filter portion; And a connection portion connected between the filter portion and the trapping portion, wherein the trapping portion is provided in the form of a wire loop made of a flexible material, so that penetration of the trapping portion into the blood vessel wall may be prevented.

According to one side, the trapping portion includes a single wire made of a metal material, and each end of the single wire is fixed to an upper end of the connecting portion, so that the trapping portion may be formed in a loop shape. .

According to one side, the trapping portion may be a wire loop having an irregular shape.

According to one side, the trapping portion may be developed in its original shape after the filter portion is deployed, and the shape may be compressed after being captured by the recovery member.

According to one side, the connection portion may be made of a flexible material, and the filter portion and the capture portion may be bent around the connection portion.

According to one side, the collecting member is provided in a hook shape, and a part of the catching portion may be captured by the collecting member.

An apparatus for removing blood clots according to an embodiment for achieving the above object includes: a filter member for filtering blood in an inferior vena cava; And a recovery member for recovering the filter member from the inferior vena cava, and a part of the filter member may be provided in a single wire loop shape.

According to one side, the recovery member may be made of a flexible material and may be deformable according to the posture or direction of the filter member.

According to one side, the filter member, a filter portion for filtering blood in the inferior vena cava; A trapping portion connected to the filter portion and captured by the recovery member upon recovery of the filter portion; And a connecting portion connected between the filter portion and the trapping portion, wherein the trapping portion or the connecting portion is made of a flexible material, and the trapping portion includes, a single wire made of a metal material, and the single wire. Each end of the wire is fixed to the upper end of the connecting portion, so that the trapping portion may be formed in a wire loop shape.

According to the blood filter and blood clot removal apparatus according to an exemplary embodiment, the trapping portion is provided in the form of a wire loop made of a flexible material to prevent the trapping portion from penetrating into the vessel wall, and thus can be easily removed through the trapping portion.

According to the blood filter and the blood clot removal apparatus according to an embodiment, even if the filter part is inclined by the connection part made of a flexible material disposed between the filter part and the trapping part, it is located in the lumen of the blood vessel and can be easily removed through the trapping part. have.

According to the blood filter and the blood clot removal apparatus according to an embodiment, it is possible to prevent the incidence of cardiovascular complications by preventing the upper end of the filter from being buried on the blood vessel wall.

According to the blood filter and the blood clot removing apparatus according to an embodiment, it can be easily removed from the blood vessel by the trapping portion in the form of an irregular wire loop and the recovery member in the form of a hook.

The effects of the blood filter and the blood clot removal device according to an embodiment are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description.

1 illustrates an apparatus for removing blood clots according to an exemplary embodiment.
Fig. 2 shows a state in which both the filter portion and the capture portion are compressed.
3 shows a state in which the filter portion is deployed and the capture portion is not deployed.
4 shows a state in which both the filter portion and the capture portion are deployed.
5 shows a state in which the filter member is recovered by the recovery member.
The following drawings attached to the present specification illustrate a preferred embodiment of the present invention, and serve to further understand the technical idea of the present invention together with the detailed description of the present invention. It is limited and should not be interpreted.

Hereinafter, embodiments will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing the embodiment, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment, terms such as first, second, A, B, (a) and (b) may be used. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

Components included in one embodiment and components including common functions will be described using the same name in other embodiments. Unless otherwise stated, the description in one embodiment may be applied to other embodiments, and a detailed description will be omitted in the overlapping range.

FIG. 1 illustrates a blood clot removal apparatus according to an embodiment, FIG. 2 illustrates a state in which both a filter portion and a capture portion are compressed, and FIG. 3 illustrates a state in which the filter portion is deployed and the capture portion is not deployed. , Fig. 4 shows a state in which both the filter part and the trapping part are deployed, and Fig. 5 shows a state in which the filter member is recovered by the recovery member.

Referring to FIG. 1, the blood clot removal apparatus 10 according to an exemplary embodiment may include a filter member 100 and a recovery member 200.

The filter member 100 may be, for example, a blood filter or an inferior vena cava filter that removes blood clots present in the blood by filtering blood in the inferior vena cava.

Specifically, the filter member 100 may include a filter portion 110 and a capture portion 120 and a connection portion 130.

The filter portion 110 may include a plurality of filter elements 112.

One end of the plurality of filter elements 112 may be connected to one end or a lower end of the connection portion 130 and the other ends of the plurality of filter elements 112 are not connected to each other, so that one end of the filter portion 110 is closed, The other end of the filter portion 110 may be open.

The internal space of the filter part 110 may be formed by the structural feature of the filter part 110, and the thrombus existing in the blood is the internal space of the filter part 110 through the open other end of the filter part 110. The thrombus flowing into or present in the blood may be maintained at the end of all or part of the plurality of filter elements 112. In addition, as the filter member 100 is recovered by the recovery member 200, the blood clot held in the filter portion 110 may be completely removed from the blood.

A capture portion 120 may be connected to the filter portion 110.

The trapping portion 120 can be trapped by the recovery member 200, in particular, the hook portion 210 upon recovery of the filter portion 110.

In this case, the capture portion 120 may be made of a flexible material.

For example, the trapping portion 120 may have adequate elasticity and rigidity, thereby preventing the trapping portion 120 from penetrating the blood vessel wall, which may be helpful when the filter portion 110 is recovered.

Further, the capture portion 120 may be made of a radiopaque material.

For example, the capturing portion 120 may be made of a platinum coil or a platinum core wire having high radiopacity, so that it can be seen more clearly through an angiography device during a blood filter procedure.

In addition, the capturing portion 120 may be provided in the form of a wire loop.

For example, the capture portion 120 may include a single wire 122 made of a metal material.

Each end of the single wire 122 may be fixed to the other end or the upper end of the connection part 130, that is, an end to which the filter part 110 is not connected to the connection part 130. Accordingly, the capture portion 120 may form a loop shape together with the connection portion 130.

At this time, although not specifically shown, it is natural that a fixing element for fixing each end of the single wire 122 may be provided on the upper end of the connection part 130.

In addition, the trapping portion 120 may form a wire loop shape having an irregular shape. In other words, the capturing portion 120 may not necessarily be formed in a circular or elliptical ring shape. The surface of the trapped portion 120 having an irregular shape may be coated with a drug through a polymer coating technique. Accordingly, generation of unnecessary blood clots due to the structure of the trapped portion 120 can be prevented.

On the other hand, the filter portion 110 or the capture portion 120 can be maintained or moved in a compressed form inside the catheter (C) before being installed in the inferior vena cava, and deployed when installed in the inferior vena cava through the catheter (C). It can be transformed into a shape.

Specifically, referring to FIG. 2, the filter portion 110 and the capture portion 120 may be maintained in a compressed form inside the catheter C before being installed in the inferior vena cava. In this state, the catheter (C) can be inserted into the site where the blood filter of the inferior vena cava will be installed.

Referring to FIG. 3, the filter portion 110 may have a shape in the lower vena cava. The filter portion 110 may be moved from the inside of the catheter C into the inferior vena cava before the trapping portion 120 and may be deployed in the shape of a filter. On the other hand, the capture portion 120 may still be held in a compressed form inside the catheter (C).

Referring to FIG. 4, the trapping portion 120 may be deployed in its original shape, that is, in the form of an irregular wire loop in the inferior vena cava. In this case, the single wire 122 may have elasticity, and may be a material that recovers to its original shape according to temperature, such as, for example, a shape memory alloy.

On the contrary, referring to FIGS. 2 to 4 in reverse order, the filter portion 110 or the trapped portion 120 maintained in a deployed state in the inferior vena cava is the filter member 100 by the recovery member 200. When recovered, it can be transformed into a compressed form while moving into the catheter (C).

Specifically, as shown in FIG. 4, the filter portion 110 may be maintained in an unfolded shape, and the capture portion 120 may be maintained in an irregular wire loop shape within the lower vena cava. In order to recover the blood filter 10 installed in the inferior vena cava, the recovery member 200 may enter the inferior vena cava through the catheter C. The catching portion 120 may be caught by the hook portion 210 in an irregular shape by the recovery member 200. The recovery member 200 that has captured the filter member 100 through the trapping portion 120 can move back into the catheter C. At this time, the trapping portion 120 in the form of an irregular wire loop contacts the inlet of the catheter C and enters the interior of the catheter C through the contact and may be elastically deformed without maintaining its shape as it is. In addition, the capturing portion 120 may be easily moved within the catheter C according to the shape of the inlet of the catheter C, for example, may be deformed as shown in FIG. 3. Due to the elastic deformation of the capturing portion 120, the filter member 100 can be naturally guided into the catheter C without being jammed at the narrow entrance of the catheter C. Subsequently, the filter portion 110 deployed inside the inferior vena cava may also be compressed as shown in FIG. 2 while entering the catheter (C).

As a result, any portion of the single wire 122 can be captured by the retrieval member 200, in particular the hook portion 210, in the deployed state. In addition, since the trapped part 120 has a single wire loop shape, no matter which part of the single wire 122 is captured, the trapped part 120 is caught at the entrance of the catheter C when moving into the catheter C. May not occur.

As described above, the trapping portion 120 is provided in the form of a single wire loop having an irregular shape, so that when the filter member 100 is recovered, the trapping portion 120 is by the recovery member 200, in particular, the hook portion 210. It can be captured effectively.

In addition, in the existing filter, the trapping portion 120 is provided in a ring shape, and when the posture of the trapping portion 120 is inclined in the blood vessel, the ring is buried on the vessel wall or the vein wall, making it difficult to remove the filter portion 110 and serious complications. Although this could be caused, the filter member 100 can be easily and safely recovered from the blood vessel by providing the trapping portion 120 in the form of a wire loop made of a flexible material.

Meanwhile, the connection portion 130 may be connected between the above-described filter portion 110 and the capture portion 120.

One end or an upper end of the connection portion 130 may be connected to a lower end of the capture portion 120 and the other end or a lower end of the connection portion 130 may be connected to an upper end of the filter portion 110.

In this case, the connection part 130 may be made of a flexible material.

Thereby, the filter portion 110 and the trapping portion 120 can be bent around the connection portion 130.

In particular, referring to FIG. 5, since the connection portion 130 is made of a flexible material or an elastic material, the connection portion 130 is bent so that the filter portion 110 and the capture portion 120 can be bent, so that the filter portion 110 ) And the capture portion 120 may be disposed to be inclined in different directions.

Accordingly, even if the postures of the filter portion 110 and the trapping portion 120 are different in the blood vessel or inferior vena cava, the trapping portion 120 is disposed in the blood vessel or inferior vena cava. ) Can be recovered.

In addition, the shape of the connecting portion 130 is not limited thereto, and any of the filter portions 110 and the trapping portion 120 may be freely bendable. For example, the connection part 130 is provided integrally with the upper end of the filter part 110, the connection part 130 is provided integrally with the lower end of the capture part 120, or the connection part 130 is a flexible material However, it is natural that it may have an irregular wire loop shape.

Meanwhile, the recovery member 200 may include a hook portion 210, a cover portion 220, and a sheath portion 230.

The hook portion 210 is provided in a hook shape, and as described above, an arbitrary portion of the single wire 122 provided in an irregular wire loop shape may be captured.

The cover part 220 may be connected to one end of the hook part 210 to open or close the inner space of the hook part 210.

For example, the cover portion 220 may be hinged to one end of the hook portion 210, and when the hook portion 210 captures any portion of a single wire 122, the cover portion 220 is hooked. After opening the inner space of the portion 210, and after the hook portion 210 has captured any portion of the single wire 122, the cover portion 220 may close the inner space of the hook portion 210 .

At this time, the cover part 220 may be operated automatically or manually, for example, in the gap between the other end of the hook part 210 and the cover part 220, an arbitrary part of the single wire 122 is located. In this case, the cover portion 220 may be automatically opened.

In addition, the sheath portion 230 may be provided in an elongated shape and connected to the hook portion 210 through a wire.

Although not specifically shown, the filter member 100 may be accommodated in the sheath portion 230 by pulling the wire after the trapping portion 120 is captured by the hook portion 210. Then, by removing the sheath portion 230 from the body, the filter member 100 and the blood clot retained in the filter member 100 may be completely removed.

As described above, in the blood clot removal apparatus according to an embodiment, the trapping portion is provided in the form of an irregular wire loop made of a flexible material to prevent the trapping portion from penetrating into the vessel wall, and a connection of a flexible material disposed between the filter portion and the trapping portion Even if the filter part is inclined by the part, it is located in the lumen of the blood vessel and can be easily removed through the capture part, and it prevents cardiovascular complications by preventing the top of the filter part from being buried in the blood vessel wall. It can be easily removed from the blood vessel by the trapping portion and the hook-shaped recovery member.

As described above, the embodiments of the present invention have been described by specific matters such as specific components and limited embodiments and drawings, but these are provided only to help a more general understanding of the present invention, and the present invention is limited to the above embodiments. It is not, and a person having ordinary knowledge in the field to which the present invention pertains can make various modifications and variations from this description. For example, the described techniques are performed in a different order from the described method, and/or components such as the described structure, device, etc. are combined or combined in a form different from the described method, or in other components or equivalents. Even if substituted or substituted by, appropriate results can be achieved. Therefore, the spirit of the present invention is limited to the described embodiments and should not be determined, and all things that are equivalent or equivalent to the claims as well as the claims to be described later fall within the scope of the present invention. .

10: blood clot removal device
100: filter member
110; Filter part
112: multiple filter elements
120: capture part
122: single wire
130: connection part
200: recovery member
210: hook portion
220: cover part
230: sheath part

Claims (11)

A filter part that removes blood clots in the blood;
A trapping portion connected to the filter portion and captured by a recovery member upon recovery of the filter portion; And
A connection portion connected between the filter portion and the capture portion;
Including,
The blood filter, wherein the trapping portion is provided in the form of a wire loop made of a flexible material, so that penetration of the trapping portion into the blood vessel wall is prevented.
The method of claim 1,
The capture part,
Single wire made of metal;
Including,
The single wire is fixed to the upper end of each of the connecting portion, the trapping portion is formed in the form of a loop, blood filter.
The method of claim 2,
The blood filter, wherein the trapping portion is an irregularly shaped wire loop.
The method of claim 2,
The capture part,
After the filter portion is unfolded, it is unfolded in its original shape,
A blood filter in which the shape is compressed after being captured by the recovery member.
The method of claim 1,
The blood filter, wherein the trapping portion is made of a radiopaque material.
The method of claim 2,
The single wire is coated with a drug to prevent the formation of blood clots.
The method of claim 1,
The connecting portion is made of a flexible material, and the filter portion and the trapping portion are bendable around the connecting portion.
The method of claim 1,
The recovery member is provided in a hook shape,
A blood filter in which a part of the trapped portion is trapped by the collecting member.
A filter member for filtering blood in the inferior vena cava; And
A recovery member for recovering the filter member from the inferior vena cava;
Including,
Part of the filter member is provided in a single wire loop shape, blood clot removal device.
The method of claim 9,
The blood clot removal device is provided with a flexible material and can be deformed according to the posture or direction of the filter member.
The method of claim 9,
The filter member,
A filter part for filtering blood in the inferior vena cava;
A trapping portion connected to the filter portion and captured by the recovery member upon recovery of the filter portion; And
A connection portion connected between the filter portion and the capture portion;
Including,
The capture part or the connection part is made of a flexible material,
The capture part,
Single wire made of metal;
Including,
One end of each of the single wire is fixed to an upper end of the connecting portion, and the trapping portion is formed in a wire loop shape.

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