阅读说明：本技术 开放式腔静脉滤器 (Open vena cava filter ) 是由 刘恒全 刘忍 潘长江 李林 刘尧灏 于 2019-12-20 设计创作，主要内容包括：本发明公开一种开放式腔静脉滤器,包括用于过滤血栓的过滤部和用于固定滤器的支撑部,过滤部包括沿静脉布置的第一过滤部和第二过滤部,第一过滤部和第二过滤部均为中心对称结构,且第一过滤部和第二过滤部通过连接部连接；支撑部包括第一支撑部和第二支撑部,第一支撑部设置于第一过滤部上,第二支撑部设置于第二过滤部上。本发明涉及的开放式腔静脉滤器,既有良好的几何稳定性,又具有较长的回收周期,还能进行定向回收或释放。在提高血栓过滤效果的同时提高了滤器的几何稳定性,减少了滤器的倾斜和移位,两侧过滤部采用非对称设计,提高了血栓过滤效果,过滤件各分别采用卷曲和弧形固定锚设计,减小了器械对血管壁的损伤。(The invention discloses an open vena cava filter, which comprises a filtering part for filtering thrombus and a supporting part for fixing the filter, wherein the filtering part comprises a first filtering part and a second filtering part which are arranged along a vein, the first filtering part and the second filtering part are in central symmetry structures, and the first filtering part and the second filtering part are connected through a connecting part; the supporting part comprises a first supporting part and a second supporting part, the first supporting part is arranged on the first filtering part, and the second supporting part is arranged on the second filtering part. The open vena cava filter has good geometric stability, long recovery period and directional recovery or release. The geometric stability of filter has been improved when improving thrombus filter effect, has reduced the slope and the aversion of filter, and both sides filter house adopts asymmetric design, has improved thrombus filter effect, and filter respectively adopts curling and the design of arc anchor, has reduced the damage of apparatus to the vascular wall.)

1. Open vena cava filter, including the supporting part that is used for filtering the filter portion of thrombus and is used for fixed filter, its characterized in that: the filter part comprises a first filter part and a second filter part which are arranged along the vein, the first filter part and the second filter part are both in centrosymmetric structures, and the first filter part and the second filter part are connected through a connecting part;

the supporting part is including being used for supporting first supporting part of first filter house on the vascular wall and being used for supporting the second supporting part of second filter house on the vascular wall, and first supporting part sets up on first filter house, and the second supporting part sets up on the second filter house.

2. The open vena cava filter according to claim 1, wherein: the first filter part and the second filter part are both formed into umbrella-shaped open structures.

3. The open vena cava filter according to claim 2, wherein: the first filter part comprises at least three first filter parts, and each first filter part extends outwards from the axis of the first filter part and is gradually bent inwards;

the second filter part comprises at least three second filter parts, and each second filter part extends outwards from the axis of the second filter part and is gradually bent inwards.

4. The open vena cava filter according to claim 3, wherein: the first supporting part is fixed at the tail end of the first filter piece.

5. The open vena cava filter according to claim 4, wherein: the second supporting part is fixed at the tail end of the second filter piece.

6. The open vena cava filter according to claim 5, wherein: the first supporting part and the second supporting part are both fixed anchors for anchoring on the inner wall of the blood vessel.

7. The open vena cava filter according to claim 4, wherein: the second support part is formed by the outer side bending part of the second filter piece.

8. The open vena cava filter according to claim 2, wherein: the connecting part is formed into a tubular structure, the first filtering part, the second filtering part and the connecting part are of an integrally formed structure, and the connecting part is positioned at the axle center of the first filtering part and the axle center of the second filtering part.

9. The open vena cava filter according to claim 8, wherein: the open vena cava filter further comprises a recovery part, the recovery part penetrates through the connecting part, recovery hooks are arranged at two ends of the recovery part, and the recovery hooks at the two ends are respectively located at the axle centers of the first filtering part and the second filtering part.

10. The open vena cava filter according to claim 3, wherein: the first filter piece and the second filter piece are arranged in an axially staggered mode.

Technical Field

The invention relates to the technical field of medical instruments, in particular to an open vena cava filter.

Background

Embolisms are pathological and clinical conditions caused by deep venous thrombi in the lower limbs or pelvis entering the pulmonary artery and its branches, blocking the tissue blood supply. With the improvement of living standard and the increase of accidents, the incidence rate of pulmonary embolism tends to rise year by year. The annual incidence rate of the deep venous thrombosis of the lower limbs of the general population in western countries reported in the literature is between 0.05 and 0.1 percent, and about 3000 ten thousand cases of patients with the deep venous thrombosis and sequelae of the lower limbs in China exist. Because of the potential danger of fatal pulmonary embolism caused by thrombus shedding, the filter is difficult to be clinically treated, and the application of the inferior vena cava filter can not only effectively prevent the occurrence of pulmonary embolism, but also ensure that thrombolysis and surgical treatment are safer.

The vena cava filter is mostly formed by weaving nickel-titanium alloy wires and carving nickel-titanium pipes, the former has the problems of low welding point strength and small radial supporting force, and the latter is a manufacturing mode selected by most manufacturers. The recyclable vena cava filter is released by intervention on a percutaneous puncture catheter or a guide wire, and is taken out after a certain time, and the filter is taken out conveniently. The recyclable vena cava filter can be used for recycling the filter in vivo through jugular vein or femoral vein by using a special recycling system through an interventional method, and has the advantages of small wound and few complications.

The existing vena cava filter has the following problems:

1. there exists a cage-shaped closed structure filter, such as the vena cava filter described in chinese patent No. CN201420865062.4, entitled vena cava filter assembly for easy removal, which has good geometric stability but short recovery period;

2. there is an open structure filter, such as the vena cava filter described in chinese patent No. CN201310442071.2, named vena cava filter, which has a long recovery period, but has poor geometric stability, is easy to incline or shift, resulting in a decrease in thrombus capture efficiency, and even a failure in thrombus filtration;

3. the filter with a conical structure is implanted in a vena cava to filter thrombus like a funnel, and the opening of the funnel can only face the blood flow to effectively intercept the thrombus, so the filter can only be recovered or released in a one-way manner, has poor adaptability to patients with special pathological changes, causes difficult clinical operation of doctors, and is easy to fail to recover or be taken out through surgical operation when a recovery device cannot capture the thrombus;

4. the existing vena cava filter fixing anchor plays a role in fixing, but simultaneously damages the blood vessel wall and is easy to cause other complications.

Disclosure of Invention

The present invention is directed to solving the above problems by providing a recyclable open vena cava filter having both good geometric stability and a long recovery period, and which can be directionally recovered or released.

In order to achieve the above object, the present disclosure provides an open vena cava filter, including a filter part for filtering thrombus and a support part for fixing the filter, the filter part including a first filter part and a second filter part arranged along a vein, the first filter part and the second filter part both having a centrosymmetric structure, and the first filter part and the second filter part being connected by a connection part;

the supporting part is including being used for supporting first supporting part of first filter house on the vascular wall and being used for supporting the second supporting part of second filter house on the vascular wall, and first supporting part sets up on first filter house, and the second supporting part sets up on the second filter house.

Alternatively, the first filter part and the second filter part are each formed in an umbrella-shaped open structure.

Optionally, the first filter part comprises at least three first filter members, each first filter member extending outwardly from the axis of the first filter part and gradually bending inwardly;

the second filter part comprises at least three second filter parts, and each second filter part extends outwards from the axis of the second filter part and is gradually bent inwards.

Optionally, the first support is fixed to the distal end of the first filter member.

Optionally, the second support portion is fixed to a distal end of the second filter member.

Optionally, the first support and the second support are each a fixation anchor for anchoring on the inner wall of the blood vessel.

Optionally, the second support part is formed by an outer bend of the second filter.

Optionally, the connecting portion is formed in a tubular structure, and the first filter portion, the second filter portion and the connecting portion are in an integrally formed structure, and the connecting portion is located at the axial center of the first filter portion and the second filter portion.

Optionally, the open vena cava filter further comprises a recycling portion, the recycling portion penetrates through the connecting portion, recycling hooks are arranged at two ends of the recycling portion, and the recycling hooks at the two ends are located at the axle centers of the first filtering portion and the second filtering portion respectively.

Optionally, the first and second filter members are axially staggered.

The invention has the beneficial effects that:

1. the first filtering part and the second filtering part are both formed into umbrella-shaped open structures, so that the geometric stability of the filter is improved while the thrombus filtering effect is improved, and the inclination and the displacement of the filter are reduced;

2. the first filtering part and the second filtering part are arranged along the vein, and the thrombus filtering effect is improved by adopting an asymmetric design;

3. the recycling devices are arranged at the axle centers of the first filtering part and the second filtering part, so that bidirectional recycling or releasing can be realized;

4. the support part adopts a design of a fixing anchor which is curled or curved, so that the damage of the instrument to the vessel wall is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a three-dimensional view of example 1 according to the embodiment, in which a is a front view thereof, B is a side view thereof, and C is a top view thereof.

Fig. 2 is three views of example 5 according to the embodiment, wherein a is a front view thereof, B is a side view thereof, and C is a top view thereof.

Description of the reference numerals

1-a first supporting part, 2-a first filtering part, 3-a connecting part, 4-a second filtering part, 5-a second supporting part and 6-a recovering part.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the terms of orientation such as "inside" and "outside" are generally defined based on the orientation or positional relationship shown in the drawings, and specifically refer to the direction of the drawing shown in fig. 1 in combination with the positional relationship of the corresponding parts in other drawings. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, without order or priority. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

The invention relates to an open vena cava filter, which comprises a filtering part for filtering thrombus and a supporting part for fixing the filter, wherein the filtering part comprises a first filtering part 2 and a second filtering part 4 which are arranged along a vein, the first filtering part 2 and the second filtering part 4 are both in central symmetry structures, and the first filtering part 2 and the second filtering part 4 are connected through a connecting part 3;

the supporting part comprises a first supporting part 1 used for supporting the first filtering part 2 on the blood vessel wall and a second supporting part 5 used for supporting the second filtering part 4 on the blood vessel wall, the first supporting part 1 is arranged on the first filtering part 2, and the second supporting part 5 is arranged on the second filtering part 4.

The first filtering part 2 and the second filtering part 4 both adopt a central symmetry structure, and the first filtering part 2 and the second filtering part 4 are respectively provided with the first supporting part 1 and the second supporting part 5 to be fixed with the vessel wall, so that the invention has better geometric stability and prevents the filter from inclining.

The invention arranges double filtering parts along the vein, and the filter can achieve the ideal thrombus filtering effect no matter the first filtering part 2 faces the blood flow direction or the second filtering part 4.

The invention provides the first supporting part 1 and the second supporting part 5 for the filter, and the first supporting part 1 and the second supporting part 5 disperse the acting force applied to the filter, reduce the acting force of the connecting point of the supporting parts and the blood vessel wall, thereby reducing the damage of the apparatus to the blood vessel wall.

Alternatively, the first filter part 2 and the second filter part 4 are each formed in an umbrella-shaped open structure.

Optionally, the first filter part 2 comprises at least three first filter members, each of which extends outwards from the axis of the first filter part 2 and is gradually bent inwards;

the second filter portion 4 includes at least three second filter members, each of which extends outward from the axis of the second filter portion 4 and is gradually bent inward.

Optionally, the first support 1 is fixed to the end of the first filter element.

Optionally, the second support 5 is fixed to the end of the second filter.

Alternatively, the first support 1 and the second support 5 are both fixation anchors for anchoring on the inner wall of the blood vessel.

Alternatively, the second support 5 is formed by an outside bend of the second filter.

Alternatively, the connecting portion 3 is formed in a tubular structure, the first filter portion 2, the second filter portion 4 and the connecting portion 3 are integrally formed, and the connecting portion 3 is located at the axial center of the first filter portion 2 and the second filter portion 4.

Specifically, a pipe is divided into n filter pieces by two sections at two ends, the filter pieces are bent and formed, and the pipe section which is not divided is formed into the connecting part 3.

Optionally, the open vena cava filter further comprises a recycling portion 6, the recycling portion 6 penetrates through the connecting portion 3, recycling hooks are arranged at two ends of the recycling portion 6, and the recycling hooks at the two ends are respectively located at the axle centers of the first filtering portion 2 and the second filtering portion 4.

The recycling portion 6 is specifically formed as a section of solid rod, the solid rod penetrates through the connecting portion 3 and is welded with the connecting portion 3, two ends of the solid rod are respectively located at the axle centers of the first filtering portion 2 and the second filtering portion 4, or two ends of the solid rod are bent to form a recycling hook, or a groove is obliquely arranged on the solid rod close to the two ends to form the recycling hook.

Optionally, the first and second filter members are axially staggered.