A secure left atrial appendage occluder

Abstract

This invention discloses a robust left atrial appendage occluder, relating to the field of medical device technology. The key technical features are: an occluder support and a sleeve; a flow-blocking membrane to prevent blood shunting is threaded onto the outer side of the occluder support; a support block for fixing a connecting rod is screwed onto the outer side of the sleeve; a fixing sleeve for rotating the support rod is sleeved onto the outer side of the connecting rod; a rotating shaft connected to the support block is rotatably connected to the end of the support rod away from the fixing sleeve; an inner rubber ring for support is glued to one side of the support block; and an outer rubber ring for supporting the occluder support is glued to the outer side of the inner rubber ring. Through the arrangement of the outer rubber ring, inner rubber ring, support block, support rod, fixing sleeve, and rotating shaft, the robustness of the left atrial appendage occluder installation is increased when the occluder is implanted into the left atrial appendage.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically, to a robust left atrial appendage occluder. Background Technology

[0002] The left atrial appendage occlusion system mainly consists of an occluder, a delivery system, and accessories. The occluder primarily comprises an occluder support, a proximal pin, and a flow-blocking diaphragm. The delivery system consists of a delivery system and accessories. The delivery system comprises a push cable and a delivery sheath, while the accessories comprise an expansion tube and a guide sheath. The flow-blocking diaphragm is made of polyethylene terephthalate, and the occluder support is made of nickel-titanium shape memory alloy.

[0003] Patent No. 201721884414.0 discloses a left atrial appendage occlusion device, which is more adaptable and can more effectively improve the occlusion effect.

[0004] Existing left atrial appendage occluders are hollow inside, which causes them to retract when compressed, potentially leading to deformation and affecting the stability of the installation. Furthermore, the choke membranes on the outside of the occluder are typically connected by sutures, making them prone to entanglement. Additionally, the lack of a hook structure results in poor conformity between the occluder and the shape of the left atrial appendage, increasing the risk of puncturing the atrial appendage wall during implantation and thus reducing the safety of the occluder.

[0005] Therefore, in order to solve the above-mentioned technical problems, this application proposes a robust left atrial appendage occlusion device. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a robust left atrial appendage occlusion device.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a robust left atrial appendage occluder, comprising an occluder support and a sleeve, wherein a flow-blocking membrane for obstructing blood flow is inserted through the outer side of the occluder support, a support block for fixing a connecting rod is screwed to the outer side of the sleeve, a fixing sleeve for driving the support rod to rotate is sleeved to the outer side of the connecting rod, a rotating shaft connected to the support block is rotatably connected to the end of the support rod away from the fixing sleeve, an inner rubber ring for support is glued to one side of the support block, and an outer rubber ring for supporting the occluder support is glued to the outer side of the inner rubber ring; when the occluder is implanted... During left atrial appendage placement, the occluder stent is deployed, and then the outer and inner rubber rings on the inner side of the occluder stent spring back, with the outer rubber ring making tight contact with the inner wall of the occluder stent. The sleeve rod inside the occluder moves, and then the connecting rod in the support block outside the sleeve rod drives the fixing sleeve to rotate. Then, the support rod outside the fixing sleeve rotates through the rotating shaft on the support block, causing the support rod to drive the support block to support the inner rubber ring, thereby increasing the stability of the left atrial appendage occluder installation. The use of a hanging method to connect the choke membrane and the occluder reduces the risk of entanglement during implantation and greatly improves production efficiency.

[0008] Preferably, the occluder bracket is welded with barbs on the outside to improve the safety of the implantation process, and there are several barbs; multiple barbs are provided on the outside of the occluder bracket, and the barbs are safe, stable, easy to retrieve and not easy to fall off during the implantation process; they can be repeatedly retrieved and unfolded, and the barbs do not deform.

[0009] Preferably, the opening of the occluder stent is integrally formed with hooks to protect the atrial appendage wall, and the number of hooks is several; the multiple hooks at the opening of the occluder stent help to increase the conformity of the occluder to the shape of the left atrial appendage and avoid puncturing the atrial appendage wall during implantation.

[0010] Preferably, the proximal structure of the occluder stent is flat; a flat proximal structure of the occluder stent facilitates rapid endothelialization after occluder implantation and reduces the risk of DRT (disturbance thrombosis) on the device surface.

[0011] Preferably, the inner rubber ring has four sets of support structures; the four sets of support structures on the inner side of the inner rubber ring increase the stability of the left atrial appendage occluder installation.

[0012] Preferably, the occluder bracket has a proximal external pin on one side that connects to the proximal internal pin.

[0013] Preferably, the outer rubber ring and the inner rubber ring are in close contact; the close contact between the outer rubber ring and the inner rubber ring increases the support effect of the occluder bracket and improves the stability of the occluder bracket.

[0014] Preferably, the inner dimensions of the fixing sleeve match the outer dimensions of the support rod; the inner side of the fixing sleeve matches the outer side of the support rod, which facilitates the rotation of the fixing sleeve outside the support rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In this invention, by using an outer rubber ring, an inner rubber ring, a support block, a bracket block, a support rod, a fixing sleeve, and a rotating shaft, when the occluder is implanted into the left atrial appendage, the occluder bracket unfolds, and then the outer and inner rubber rings on the inner side of the occluder bracket spring back, with the outer rubber ring in close contact with the inner wall of the occluder bracket. The sleeve rod inside the occluder moves, and then the connecting rod in the support block outside the sleeve rod drives the fixing sleeve to rotate. Then, the support rod outside the fixing sleeve rotates through the rotating shaft on the support block, causing the support rod to drive the support block to support the inner rubber ring, thereby increasing the stability of the left atrial appendage occluder installation.

[0017] 2. In this invention, multiple barbs are provided on the outside of the occluder support by setting hooks and barbs. The barbs are safe, stable, easy to retrieve and not easy to fall off during the implantation process. They can be repeatedly retrieved and unfolded, and the barbs do not deform. Multiple hooks are set at the opening of the occluder support, which helps to increase the conformity of the occluder to the shape of the left atrial appendage and avoid puncturing the atrial appendage wall during the implantation process. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 This is a top view of the structure in this invention;

[0021] Figure 3 This is a schematic diagram of the bottom view structure in this invention;

[0022] Figure 4 This is a schematic diagram of the internal support structure in this invention;

[0023] Figure 5 This is a schematic cross-sectional view of the structure in this invention;

[0024] 1. Flow-blocking membrane; 2. Back hook; 3. Occluder bracket; 4. Forward barb; 5. Outer rubber ring; 6. Inner rubber ring; 7. Sleeve rod; 8. Proximal external pin; 9. Proximal internal pin; 10. Support block; 11. Support rod; 12. Fixing sleeve; 13. Connecting rod; 14. Support block; 15. Rotating shaft. Detailed Implementation

[0025] like Figure 1-5As shown, this invention provides a robust left atrial appendage occlusion device, comprising an occlusion device support 3 and a sleeve 7. A flow-blocking membrane 1 to prevent blood shunting is inserted through the outer side of the occlusion device support 3. A support block 14 for fixing a connecting rod 13 is screwed to the outer side of the sleeve 7. A fixing sleeve 12 for rotating a support rod 11 is sleeved on the outer side of the connecting rod 13. A rotating shaft 15 connected to a support block 10 is rotatably connected to the end of the support rod 11 away from the fixing sleeve 12. An inner rubber ring 6 for support is glued to one side of the support block 10, and an outer rubber ring 5 for supporting the occlusion device support 3 is glued to the outer side of the inner rubber ring 6. When the occlusion device is implanted into the left atrial appendage, the occlusion device... The occluder stent 3 is unfolded, and then the outer rubber ring 5 and inner rubber ring 6 on the inner side of the occluder stent 3 spring back. The outer rubber ring 5 is in close contact with the inner wall of the occluder stent 3. The sleeve 7 inside the occluder moves, and then the connecting rod 13 in the support block 14 outside the sleeve 7 drives the fixing sleeve 12 to rotate. Then the support rod 11 outside the fixing sleeve 12 rotates through the rotating shaft 15 on the support block 10, so that the support rod 11 drives the support block 10 to support the inner rubber ring 6, thereby increasing the firmness of the left atrial appendage occluder installation. The use of a hanging method to connect the flow-blocking membrane 1 and the occluder stent 2 reduces the risk of entanglement during implantation and greatly improves production efficiency.

[0026] To improve the safety of occluder implantation, for example, such as Figure 1 As shown, the present invention also includes a plurality of forward and backward barbs 4 welded to the outside of the occluder bracket 3 to improve the safety of the implantation process; the occluder bracket 3 is provided with a plurality of forward and backward barbs 4, which are safe, stable, easy to retrieve and not easy to fall off during the implantation process; they can be repeatedly retrieved and unfolded, and the barbs do not deform.

[0027] To avoid puncturing the atrial appendage wall during occluder implantation, for example, such as Figure 1 As shown, the present invention also includes a plurality of hooks 2 integrally formed at the opening of the occluder bracket 3 to protect the atrial appendage wall; the occluder bracket 3 is provided with a plurality of hooks 2 at the opening, which helps to increase the conformity of the occluder to the shape of the left atrial appendage and avoid puncturing the atrial appendage wall during implantation.

[0028] To facilitate rapid endothelialization after occluder implantation, for example, such as Figure 1 As shown, the present invention also includes a flat proximal structure of the occluder stent 3; a flat proximal structure of the occluder stent 3 facilitates rapid endothelialization after implantation of the occluder and reduces the risk of DRT thrombosis on the device surface.

[0029] To increase the security of the left atrial appendage occluder installation, for example, such as Figure 3As shown, the present invention also includes four sets of support structures inside the inner rubber ring 6; four sets of support structures are provided on the inner side of the inner rubber ring 6 to increase the firmness of the left atrial appendage occluder installation.

[0030] To improve the release of the plug, for example, such as Figure 2 As shown, the present invention also includes a proximal external pin 8 connected to the proximal internal pin 9 on one side of the occluder bracket 3.

[0031] For the robustness of the occluder bracket 3, exemplarily, such as... Figure 3 As shown, the present invention also includes that the outer rubber ring 5 and the inner rubber ring 6 are in close contact; the close contact between the outer rubber ring 5 and the inner rubber ring 6 increases the support effect of the occluder bracket 3 and improves the firmness of the occluder bracket 3.

[0032] To allow the retaining sleeve 12 to rotate outside the support rod 11, for example, such as Figure 4 As shown, the present invention also includes that the inner size of the fixing sleeve 12 matches the outer size of the support rod 11; the inner side of the fixing sleeve 12 matches the outer side of the support rod 11, which facilitates the fixing sleeve 12 to rotate outside the support rod 11.

[0033] Working principle: When the occluder is implanted into the left atrial appendage, multiple hooks 2 are provided at the opening of the occluder support 3 to help increase the conformity of the occluder to the shape of the left atrial appendage and avoid puncturing the atrial appendage wall during implantation. Multiple barbs 4 are provided on the outside of the occluder support 3. These barbs 4 are safe, stable, easy to retrieve, and not easily dislodged during implantation; they can be repeatedly retrieved and unfolded without deformation. The occluder support 3 is unfolded, and then the outer rubber ring 5 and inner rubber ring 6 on the inner side of the occluder support 3 spring back. 5. The sleeve 7 inside the occluder moves in close contact with the inner wall of the occluder stent 3. Then, the connecting rod 13 in the outer support block 14 of the sleeve 7 drives the fixed sleeve 12 to rotate. Then, the support rod 11 outside the fixed sleeve 12 rotates through the rotating shaft 15 on the support block 10, so that the support rod 11 drives the support block 10 to support the inner rubber ring 6, thereby increasing the stability of the left atrial appendage occluder installation. The proximal structure of the occluder stent 3 is set flat, which helps the rapid endothelialization after the occluder is implanted and reduces the risk of DRT of thrombus on the device surface.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A robust left atrial appendage occlusion device, characterized in that: The device includes an occluder support (3) and a sleeve (7). The occluder support (3) has a flow-blocking membrane (1) that blocks blood flow through its outer side. The sleeve (7) has a support block (14) that fixes the connecting rod (13) to its outer side. The connecting rod (13) has a fixed sleeve (12) that drives the support rod (11) to rotate. The end of the support rod (11) away from the fixed sleeve (12) is rotatably connected to a rotating shaft (15) that is connected to the support block (10). The support block (10) has an inner rubber ring (6) that provides support on one side. The inner rubber ring (6) has an outer rubber ring (5) that supports the occluder support (3) to its outer side.

2. The robust left atrial appendage occlusion device according to claim 1, characterized in that: The occluder bracket (3) has barbs (4) welded to its outer side to improve the safety of the implantation process, and the number of barbs (4) is several.

3. A robust left atrial appendage occlusion device according to claim 1, characterized in that: The opening of the occluder support (3) is integrally formed with a hook (2) to protect the atrial wall, and the number of hooks (2) is several.

4. A robust left atrial appendage occlusion device according to claim 1, characterized in that: The occluder support (3) of the occluder has a flat proximal structure.

5. A robust left atrial appendage occlusion device according to claim 1, characterized in that: The inner rubber ring (6) has four sets of support structures.

6. A robust left atrial appendage occlusion device according to claim 1, characterized in that: The occluder bracket (3) is provided with a proximal external pin (8) on one side, which connects to the proximal internal pin (9).

7. A robust left atrial appendage occlusion device according to claim 1, characterized in that: The outer rubber ring (5) and the inner rubber ring (6) are in close contact.

8. A robust left atrial appendage occlusion device according to claim 1, characterized in that: The inner dimensions of the fixed sleeve (12) match the outer dimensions of the support rod (11).

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