Anti-embolism protection device

Abstract

The utility model provides an anti-embolism protection device which comprises an embolism collecting assembly, the embolism collecting assembly comprises a filtering piece, the filtering piece is a porous flexible filtering piece, and an embolism collecting cavity is formed in the filtering piece. According to the anti-embolism protection device, the embolus collecting assembly and the sheathing canal are designed in a separated mode, the anti-embolism protection device can be used for a direct-view open operation, the embolus collecting assembly is conveyed into a target area through the sheathing canal, the embolus collecting assembly is taken out through an opening, and the elastic supporting piece is converted into a supporting state under the elastic effect; the elastic supporting piece supports the filtering piece and is attached to the inner wall of the tissue, the filtering piece filters and collects calcified plaques, thrombus and tissue particles, the first folding point and the second folding point on the elastic supporting piece are limited, the surface contact size of the elastic supporting piece is increased, and compared with a traditional regular circular-ring-shaped opening, the elastic supporting piece is not prone to falling off. The elastic supporting piece is arranged in the tissue and has better stability, and the situation that the filtering piece inclines after being released, and consequently the filtering and collecting functions of the filtering piece lose efficacy is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and in particular to an anti-embolism protection device which can be used in cardiovascular open surgery to prevent foreign bodies such as calcification and thrombus from falling off and causing organ embolism. Background Art

[0002] In open cardiovascular surgery, it is inevitable to deal with foreign tissues such as calcification, thrombus, and fat particles. For example, heart valve disease is the largest disease in cardiovascular surgery. When valve stenosis or insufficiency reaches moderate or severe, surgical valve replacement or valve repair is often required. The causes of valve stenosis or insufficiency include rheumatism, infection, and degeneration. In most cases, these valves will undergo organic changes such as thickening and calcification. During surgery, when performing valve removal or repair, it is necessary to guard against calcification and foreign tissue shedding, which may cause the risk of organ embolism caused by foreign bodies after cardiac resuscitation. The commonly used clinical method is to repeatedly rinse with saline after valve removal. For example, in large vessel disease, another major disease in cardiovascular surgery, during large vessel surgery, such as aortic dissection and aortic aneurysm, when performing vascular replacement, it is usually necessary to remove the diseased vascular tissue. The operation is accompanied by the removal of blood clots and atherosclerotic tissue. Beware of foreign tissue shedding and residues left in the distal end of the vascular cavity, which may cause embolism to the corresponding organs.

[0003] Currently, existing embolus collection and filtering devices are generally used for intracavitary interventional treatment. To facilitate recovery, the embolus filter and the device for releasing the filter in the device are integrated, which is not conducive to direct vision open surgery. In addition, the support for placing the filter in the chamber adopts a circular ring design, which is easy to tilt when released, resulting in the failure of its filtering and collecting function.

[0004] Therefore, in order to solve the above problems, the utility model provides an anti-embolism protection device which is convenient for use in direct vision open surgery and has good placement stability. Utility Model Content

[0005] In order to solve the above problems, the utility model provides an anti-embolism protection device.

[0006] According to one purpose of the present invention, the present invention provides an anti-embolism protection device, comprising:

[0007] An embolus collection component, the embolus collection component comprising:

[0008] A filter element, wherein the filter element is a porous and flexible filter element, and the filter element is provided with an embolus collecting cavity and a movable port communicating with the inside and outside of the embolus collecting cavity;

[0009] An elastic support member, wherein the elastic support member is arranged along the circumference of the movable opening, and the elastic support member is provided with a plurality of first folding points and a plurality of second folding points. In the circumference of the movable opening, the first folding points and the second folding points are arranged alternately and spaced apart, and in the axial direction of the movable opening, the first folding points and the second folding points are arranged spaced apart. The elastic support member is provided with at least two working states, namely a supporting state and a retracted state. When the elastic support member is in the supporting state, adjacent first folding points and adjacent second folding points on the elastic support member are far away from each other, and when the elastic support member is in the retracted state, adjacent first folding points and adjacent second folding points on the elastic support member are close to each other;

[0010] The sheath tube and the embolus collecting assembly are independently arranged, wherein the sheath tube is arranged to be suitable for accommodating a filter element and an elastic support element in a retracted state, and an opening is arranged on the sheath tube for the filter element and the elastic support element to enter and exit.

[0011] Preferably, the elastic support member is ring-shaped, and the elastic support member is continuously arranged along the length direction of the movable opening.

[0012] Preferably, the first inflection point is connected to the active opening, and the second inflection point is located in the embolus collection cavity.

[0013] Preferably, the length of the elastic support member is much greater than the circumferential length of the movable opening.

[0014] Preferably, in the radial direction of the movable port, the elastic support member extends out of the outer wall of the filter element.

[0015] Preferably, the inner wall of the sheath tube and the outer wall of the elastic support member are both smoothly arranged.

[0016] Preferably, the sheath tube is a straight cylindrical sheath tube, and the two ends of the sheath tube in the length direction are respectively a release end and an operating end, and an opening is respectively provided on the release end and the operating end, and the filter element and the elastic support element are arranged in sequence along the direction of the line from the release end to the operating end.

[0017] Preferably, the anti-embolism protection device further comprises:

[0018] A recovery member connected to the elastic support member;

[0019] A push rod, one end of which in the length direction matches the recovery member, and the push rod is configured to be suitable for entering and exiting the sheath tube through the opening on the sheath tube.

[0020] Preferably, the recovery member is fixedly connected to the elastic support member, the recovery member is an annular recovery member, and the recovery member is located inside the movable opening;

[0021] One radial side of the push rod extends outward to form a first hook body and a second hook body, and the first hook body and the second hook body are both arranged near one end of the push rod in the length direction, and the end of the first hook body and the end of the second hook body are relatively bent, and the recovery member can be hung on the first hook body or the second hook body.

[0022] Preferably, the length of the push rod is not less than the length of the sheath tube.

[0023] Compared with the prior art, the beneficial effects of the utility model are:

[0024] The embolus collection component and the sheath in the anti-embolism protection device are designed to be separated and can be used for direct vision open surgery. The embolus collection component is delivered to the target area through the sheath, and the embolus collection component is taken out through the opening. The elastic support member is transformed into a supporting state under the action of elasticity. The elastic support member holds up the filter member and fits against the inner wall of the tissue. The filter member filters and collects calcified plaques, thrombi, and tissue particles. The first inflection point and the second inflection point on the elastic support member are defined, thereby increasing the surface contact size of the elastic support member. Compared with the traditional regular circular opening, the elastic support member has better stability when placed in the tissue, thereby preventing the filter member from tilting after being released, causing its filtering and collection function to fail.

[0025] The present invention is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an overall schematic diagram of an embolus collection component of an anti-embolism protection device according to the utility model;

[0027] Figure 2 This is an overall schematic diagram of a sheath tube of an anti-embolism protection device according to the utility model;

[0028] Figure 3 The utility model is a schematic diagram of the overall push rod of the anti-embolism protection device.

[0029] In the figure: 100, embolus collection assembly; 101, filter element; 1011, embolus collection chamber; 1012, movable opening; 200, elastic support element; 201, first inflection point; 202, second inflection point; 300, sheath; 301, release end; 302, operating end; 400, recovery element; 500, push rod; 501, first hook body; 502, second hook body. DETAILED DESCRIPTION

[0030] The following description is used to fully explain the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0031] See also Figure 1-2 The utility model provides a technical solution: an anti-embolism protection device, comprising:

[0032] The embolus collecting assembly 100 comprises:

[0033] A filter element 101, wherein the filter element 101 is a porous and flexible filter element 101, and the filter element 101 is provided with an embolus collecting cavity 1011 and a movable opening 1012 communicating with the inside and outside of the embolus collecting cavity 1011;

[0034] An elastic support member 200, wherein the elastic support member 200 is arranged along the circumference of the movable opening 1012, and a plurality of first folding points 201 and a plurality of second folding points 202 are arranged on the elastic support member 200. In the circumference of the movable opening 1012, the first folding points 201 and the second folding points 202 are arranged alternately and spaced apart, and in the axial direction of the movable opening 1012, the first folding points 201 and the second folding points 202 are arranged spaced apart, and the elastic support member 200 is provided with at least two working states, namely a supporting state and a retracted state. When the elastic support member 200 is in the supporting state, the adjacent first folding points 201 and the adjacent second folding points 202 on the elastic support member 200 are far away from each other, and when the elastic support member 200 is in the retracted state, the adjacent first folding points 201 and the adjacent second folding points 202 on the elastic support member 200 are close to each other;

[0035] The sheath tube 300 and the embolus collecting assembly 100 are independently arranged, wherein the sheath tube 300 is arranged to accommodate the filter element 101 and the elastic support element 200 in a retracted state, and the sheath tube 300 is provided with an opening for the filter element 101 and the elastic support element 200 to enter and exit.

[0036] The embolus collection component 100 and the sheath 300 in the anti-embolism protection device are of separate design and can be used for direct vision open surgery. The embolus collection component 100 is delivered to the target area through the sheath 300, and the embolus collection component 100 is taken out through the opening. The elastic support member 200 is transformed into a supporting state under the action of elasticity. The elastic support member 200 holds up the filter member 101 and fits against the inner wall of the tissue. The filter member 101 filters and collects calcified plaques, thrombi, and tissue particles. The first inflection point 201 and the second inflection point 202 on the elastic support member 200 are defined, thereby increasing the surface contact size of the elastic support member 200. Compared with the traditional regular circular opening, the elastic support member 200 has better stability when placed in the tissue, thereby preventing the filter member 101 from tilting after being released, resulting in failure of its filtering and collecting function.

[0037] To ensure that the elastic support member 200 can fully act on the active opening 1012, when the device is placed in the target area, the elastic support member 200 can fully expand the active opening 1012 to avoid the filter 101 being unable to expand, the filter 101 not fitting well after expansion, etc., in one embodiment, the elastic support member 200 is ring-shaped, and the elastic support member 200 is continuously arranged along the length direction of the active opening 1012. In another embodiment, to prevent the elastic support member 200 from occupying the external space of the filter 101, the first folding point 201 is connected to the active opening 1012, and the second folding point 202 is located in the embolus collection cavity 1011.

[0038] Furthermore, the length of the elastic support member 200 is much greater than the circumferential length of the movable opening 1012. Preferably, the length of the elastic support member 200 is not less than 3 times the circumferential length of the movable opening 1012. Furthermore, in the radial direction of the movable opening 1012, the elastic support member 200 extends out of the outer wall of the filter element 101. When the elastic support member 200 is in a supporting state, the protruding portion can fully contact the inner wall of the tissue, thereby achieving stable installation of the embolus collection assembly 100.

[0039] In order to facilitate pushing the embolus collecting assembly 100 out of the sheath tube 300 and removing the embolus collecting assembly 100 from the sheath tube 300 , the present invention proposes the following improvements.

[0040] In order to reduce the resistance of the filter 101 and the elastic support 200 when entering and pushing out the sheath 300, further, the inner wall of the sheath 300 and the outer wall of the elastic support 200 are both smooth. Through the above definition, when the elastic support 200 is taken out of the sheath 300, there is less friction between the two, which is easy to operate and improves the use efficiency of the device.

[0041] Regarding the structure of the sheath tube 300, in one embodiment of the present utility model, specifically, the sheath tube 300 is a straight-cylindrical sheath tube 300, and the two ends of the sheath tube 300 in the length direction are respectively a release end 301 and an operating end 302, and an opening is respectively provided on the release end 301 and the operating end 302, and the filter element 101 and the elastic support element 200 are sequentially arranged along the connecting direction from the release end 301 to the operating end 302. More specifically, the openings on the release end 301 and the operating end 302, and the axis of the sheath tube 300 coincide with each other. This is to facilitate the release and collection of the embolus collection assembly 100 in the sheath tube 300.

[0042] For further information, see Figures 1 to 3 , the anti-embolic protection device also includes:

[0043] A recovery member 400, wherein the recovery member 400 is connected to the elastic support member 200; a push rod 500, wherein one end of the push rod 500 in the length direction matches the recovery member 400, and the push rod 500 is configured to be suitable for entering and exiting the sheath tube 300 through the opening on the sheath tube 300.

[0044] By adding a recovery fastener, the first hook 501 and the second hook 502 on the push rod 500 can hook the recovery member 400, thereby pulling the elastic support member 200, so as to complete the pulling out and storage of the embolus collection assembly 100 into the sheath tube 300.

[0045] Furthermore, the recovery member 400 is fixedly connected to the elastic support member 200. Preferably, the recovery member 400 and the elastic support member 200 are integrally formed. The recovery member 400 is an annular recovery member 400, and the recovery member 400 is located inside the movable opening 1012. The radial side of the push rod 500 extends outward to form a first hook 501 and a second hook 502. The first hook 501 and the second hook 502 are both arranged near one end of the push rod 500 in the length direction. The end of the first hook 501 and the end of the second hook 502 are relatively bent, and the recovery member 400 can be hung on the first hook 501 or the second hook 502. The push rod 500 can cooperate with the recovery member 400 to pull the embolus collection assembly 100 into the sheath tube 300.

[0046] To ensure that the push rod 500 can fully push out the embolus collecting assembly 100 in the sheath tube 300 , further, the length of the push rod 500 is not less than the length of the sheath tube 300 .

[0047] Directions:

[0048] Take the application of the anti-embolism protection device in cardiovascular open surgery to prevent foreign bodies such as calcification and thrombus from falling off and causing organ embolism as an example;

[0049] Align the release end 301 of the sheath tube 300 with the chamber to be released, push the push rod 500, and extend it into the sheath tube 300 through the opening of the operating end 302 of the sheath tube 300. The push rod 500 pushes the elastic support member 200 and the filter member 101 in the sheath tube 300 to be released in sequence through the opening of the release end 301. The elastic support member 200 drives the movable opening 1012 of the filter member 101 to expand under the elastic action, and the elastic support member 200 squeezes the inner wall of the chamber tissue to achieve the installation of the embolus collection assembly 100.

[0050] After the valve or blood vessel tissue is processed, the first hook 501 or the second hook 502 on the push rod 500 is hooked onto the recovery member 400 on the elastic support member 200, and the elastic support member 200 and the filter member 101 are recovered into the sheath tube 300, and then the whole is taken out.

[0051] In summary, the anti-embolism protection device generally includes an embolus collection component 100 and a sheath 300 for component release and storage. The embolus collection component 100 includes a filter 101 and an elastic support 200. The filter 101 and the elastic support 200 can be set in different models according to different application scenarios, such as application in the ventricle, aorta or carotid artery, etc.; the filter 101 is a bag-like structure made of filter material, which can collect calcified plaques, thrombi, and tissue particles; the elastic support 200 is fixed at the movable port 1012 of the filter 101, and the elastic support 200 adopts a Z-shaped structure design to ensure that the collection bag can fit the cavity wall after release, and can adapt to a certain range of cavity size changes; the sheath 300 can cooperate with the push rod 500 for the release and storage of the embolus collection component 100.

[0052] The main advantages of this solution are as follows:

[0053] 1. The elastic support frame adopts a Z-shaped structure design, which can effectively avoid the situation where the filter element 101 is not fully unfolded and does not fit well after unfolding;

[0054] 2. The sheath 300 and the embolus collection assembly 100 are separately arranged. Compared with the existing integrated anti-embolism device for clinical intracavitary interventional thrombectomy, this device can be used for direct vision surgery and is easy to recover.

[0055] The embodiments described above are only used to illustrate the technical ideas and features of the utility model, and their purpose is to enable technicians in this field to understand the content of the utility model and implement it accordingly. The patent application scope of the utility model cannot be limited only by this embodiment, that is, any equivalent changes or modifications made according to the spirit disclosed by the utility model still fall within the patent scope of the utility model.

Claims

1. An anti-embolism protection device, characterized in that: include: An embolus collecting assembly (100), the embolus collecting assembly (100) comprising: A filter element (101), wherein the filter element (101) is a porous and flexible filter element (101), and the filter element (101) is provided with an embolus collecting cavity (1011) and a movable opening (1012) communicating with the inside and outside of the embolus collecting cavity (1011); An elastic support member (200), the elastic support member (200) being arranged along the circumference of the movable opening (1012), the elastic support member (200) being provided with a plurality of first inflection points (201) and a plurality of second inflection points (202), in the circumferential direction of the movable opening (1012), the first inflection points (201) and the second inflection points (202) being arranged at staggered intervals, in the axial direction of the movable opening (1012), the first inflection points (201) and the second inflection points (202) being arranged at intervals of The elastic support member (200) is provided with at least two working states, namely a supporting state and a retracted state. When the elastic support member (200) is in the supporting state, the adjacent first folding points (201) and the adjacent second folding points (202) on the elastic support member (200) are far away from each other. When the elastic support member (200) is in the retracted state, the adjacent first folding points (201) and the adjacent second folding points (202) on the elastic support member (200) are close to each other. A sheath tube (300), wherein the sheath tube (300) and the embolus collecting assembly (100) are independently arranged, wherein the sheath tube (300) is arranged to be suitable for accommodating a filter element (101) and an elastic supporting element (200) in a retracted state, and an opening is arranged on the sheath tube (300) for the filter element (101) and the elastic supporting element (200) to enter and exit.

2. An anti-embolic protection device according to claim 1, characterized in that: The elastic support member (200) is ring-shaped, and the elastic support member (200) is continuously arranged along the length direction of the movable opening (1012).

3. An anti-embolic protection device according to claim 1, characterized in that: The first inflection point (201) is connected to the movable opening (1012), and the second inflection point (202) is located in the embolus collection cavity (1011).

4. An anti-embolic protection device according to claim 1, characterized in that: The length of the elastic support member (200) is much greater than the circumferential length of the movable opening (1012).

5. An anti-embolic protection device according to claim 1, characterized in that: In the radial direction of the movable opening (1012), the elastic support member (200) extends out of the outer wall of the filter member (101).

6. An anti-embolic protection device according to claim 1, characterized in that: The inner wall of the sheath tube (300) and the outer wall of the elastic support member (200) are both smoothly arranged.

7. An anti-embolic protection device according to claim 1, characterized in that: The sheath tube (300) is a straight-cylindrical sheath tube (300), and the two ends of the sheath tube (300) in the length direction are respectively a release end (301) and an operating end (302), and an opening is respectively provided on the release end (301) and the operating end (302), and the filter element (101) and the elastic support element (200) are arranged in sequence along the direction of the line from the release end (301) to the operating end (302).

8. An anti-embolic protection device according to claim 1, characterized in that: Also includes: A recovery member (400), wherein the recovery member (400) is connected to the elastic support member (200); A push rod (500), one end of which in the length direction matches the recovery member (400), and the push rod (500) is configured to be suitable for entering and exiting the sheath tube (300) through the opening on the sheath tube (300).

9. An anti-embolic protection device according to claim 8, characterized in that: The recovery member (400) is fixedly connected to the elastic support member (200), the recovery member (400) is an annular recovery member (400), and the recovery member (400) is located inside the movable opening (1012); One radial side of the push rod (500) extends outward to form a first hook body (501) and a second hook body (502). The first hook body (501) and the second hook body (502) are both arranged near one end of the push rod (500) in the length direction. The end of the first hook body (501) and the end of the second hook body (502) are bent relative to each other. The recovery member (400) can be hung on the first hook body (501) or the second hook body (502).

10. An anti-embolic protection device according to claim 8, characterized in that: The length of the push rod (500) is not less than the length of the sheath tube (300).

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