Double-ring atrial stent

Abstract

The application provides a double-layer annular atrial stent, and relates to the technical field of medical devices.The atrial stent comprises a hollow circular stent, a sealing film and an artificial valve; the hollow circular stent is installed in an atrium; the sealing film is arranged on the outer portion of the hollow circular stent and the lower half portion of the inner cylinder of the hollow circular stent; and the artificial valve is arranged in the lower half portion of the inner cylinder of the hollow circular stent.In the application, blood has a very small probability of generating thrombus during the process of passing through the hollow circular stent, and even if the thrombus is generated, the thrombus will be trapped in the hollow annular cavity of the hollow circular stent, so that the risk of the thrombus blocking blood vessels is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a double-layered annular atrial stent. Background Technology

[0002] The heart is divided into left and right ventricular septa, each containing a ventricle and an atrium. The ventricles are separated by the interventricular septum, and the atria are separated by the interatrial septum. Valves prevent backflow of blood between the atria, ventricles, and arteries. Specifically, the valve between the left atrium and left ventricle is the mitral valve; the valve between the right atrium and right ventricle is the tricuspid valve; the valve between the left ventricle and the great artery is the aortic valve; and the valve between the right ventricle and the pulmonary artery is the pulmonary valve.

[0003] If a valve cannot close completely or opens insufficiently due to disease or other reasons, it will lead to blood reflux and insufficient blood supply. For example, valvular stenosis causing poor blood flow or incomplete closure will result in insufficient blood supply to the heart, greatly increasing the burden on the heart and leading to heart failure. Traditional treatment for this type of valvular heart disease involves open-chest surgery, cardiac arrest, and, under hypothermic circulatory support, surgical repair of the valve or replacement with an artificial valve. After the surgery, the heart is restarted to complete subsequent procedures. The surgical trauma, risks, and long-term, expensive postoperative rehabilitation of valve replacement make many patients unwilling to undergo surgery.

[0004] With the continuous development of minimally invasive surgical techniques, artificial valves can be introduced into the patient's body through a catheter, that is, the heart valve is placed through minimally invasive interventional surgery. The surgery does not require opening the chest, so it is less traumatic and the postoperative recovery is faster. It provides a new solution for patients with valvular stenosis whose lives cannot be prolonged or whose pain cannot be relieved by conventional treatments.

[0005] However, most atrial stents for artificial valves are currently single-layered ball cage structures. When blood flows through the stent, the flow rate slows down, which poses a risk of thrombosis and blockage of blood vessels. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a double-layered annular atrial stent, which solves the problem that atrial stents may cause thrombosis and block blood vessels.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A double-layered annular atrial stent, the atrial stent comprising: a hollow annular stent, a sealing membrane, and an artificial valve;

[0011] The hollow ring stent is installed inside the atrium;

[0012] The hollow ring stent is provided with a sealing membrane on its outer surface and the lower half of its inner cylinder, so that the atrium and ventricle are connected only through the inner cylinder of the hollow ring stent.

[0013] The artificial valve is installed in the lower half of the inner cylinder of the hollow annular support.

[0014] Preferably, the hollow ring stent is provided with elastic barbs on its outer surface, the elastic barbs are arranged around the circumference of the outer cylinder of the hollow ring stent, and the elastic barbs are driven into the inner wall of the atrium.

[0015] Preferably, the hollow ring support is provided with an elastic expansion support on its exterior, and the elastic expansion support is provided with a sealing film.

[0016] Preferably, the hollow annular support is provided with hooks on the outside, which open and hook the original valve.

[0017] Preferably, a limiting spring is provided on the outside of the hollow annular support, and the limiting spring clamps the original valve.

[0018] Preferably, the sealing membrane completely covers the hollow annular stent, so that blood can only pass through the inner cylinder of the hollow annular stent.

[0019] (III) Beneficial Effects

[0020] This invention provides a double-layered annular atrial stent. Compared with the prior art, it has the following advantages:

[0021] In this invention, the hollow annular stent is installed inside the atrium; a sealing membrane is provided on the outer surface of the hollow annular stent and the lower half of its inner cylinder; the artificial valve is placed inside the lower half of the inner cylinder of the hollow annular stent. There is a very small probability that blood will form a thrombus during its passage through the hollow annular stent; even if a thrombus forms, it will be trapped within the hollow annular cavity of the stent, effectively avoiding the risk of thrombus blocking the blood vessel. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a top axonometric view of the central room support structure in Embodiment 1 of the present invention;

[0024] Figure 2 This is a top view of the central room support structure according to Embodiment 1 of the present invention;

[0025] Figure 3 This is a bottom-view axonometric drawing of the central room support structure in Embodiment 2 of the present invention;

[0026] Figure 4 This is a bottom-view axonometric drawing of the central room support structure in Embodiment 3 of the present invention;

[0027] Figure 5 This is a bottom-view axonometric drawing of the central room support structure in Embodiment 4 of the present invention;

[0028] Figure 6 This is a bottom-view axonometric drawing of the central room support structure in Embodiment 5 of the present invention;

[0029] Figure 7 This is a top-view axonometric view of the central room support structure in Embodiment 6 of the present invention. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This application provides a double-layered annular atrial stent, which solves the problem that atrial stents may cause thrombosis and block blood vessels.

[0032] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0033] In this embodiment of the invention, the hollow annular stent is installed inside the atrium; a sealing membrane is provided on the outside of the hollow annular stent and the lower half of its inner cylinder; the artificial valve is placed inside the lower half of the inner cylinder of the hollow annular stent. There is a very small probability that blood will form a thrombus during its passage through the hollow annular stent; even if a thrombus forms, it will be trapped within the hollow annular cavity of the stent, effectively avoiding the risk of thrombus blocking the blood vessel.

[0034] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0035] Example 1:

[0036] like Figure 1 , Figure 2As shown, the present invention provides a double-layer annular atrial stent, the atrial stent comprising: a hollow annular stent 10, a sealing membrane 20, and an artificial valve 30;

[0037] The hollow ring stent 10 is installed inside the atrium;

[0038] A sealing membrane 20 is provided on the outside of the hollow ring stent 10 and the lower half of its inner cylinder, so that the atrium and ventricle are connected only through the inner cylinder of the hollow ring stent 10.

[0039] The artificial valve 30 is disposed in the lower half of the inner cylinder of the hollow annular support 10.

[0040] There is a very small probability that blood will form a thrombus during the process of blood passing through the hollow annular stent 10. Even if a thrombus forms, it will be trapped in the hollow annular cavity of the hollow annular stent 10, effectively avoiding the risk of thrombus blocking blood vessels.

[0041] The manufacturing process of the hollow ring support 10 includes: filament weaving structure, laser engraving, and 3D printing;

[0042] The hollow ring support 10 is made of materials including: nickel-titanium alloy, stainless steel, platinum-iridium alloy, pure titanium and other metal materials;

[0043] The hollow ring support 10 is made of materials including polylactic acid and other biodegradable polymers.

[0044] Example 2:

[0045] like Figure 3 As shown, the hollow ring stent 10 is provided with elastic barbs 11 on its outside. The elastic barbs 11 are arranged around the circumference of the outer cylinder of the hollow ring stent 10. The elastic barbs 11 are driven into the inner wall of the atrium, restricting the movement of the hollow ring stent 10 in the atrium and further improving the connection stability between the hollow ring stent 10 and the atrium.

[0046] Example 3:

[0047] like Figure 4 As shown, the hollow annular support 10 is provided with an elastic expansion support 12 on its outside, and the elastic expansion support 12 is provided with a sealing membrane 20 to effectively prevent periocular leakage.

[0048] Example 4:

[0049] like Figure 5 As shown, the hollow annular support 10 is provided with a hook 13 on the outside. The hook 13 opens and hooks the original valve, causing the original valve to lose its function and preventing insufficient blood supply caused by insufficient opening of the original valve.

[0050] Example 5:

[0051] like Figure 6 As shown, a limiting spring 14 is provided on the outside of the hollow ring support 10. The limiting spring 14 clamps the original valve to prevent the original valve from opening excessively.

[0052] Example 6:

[0053] like Figure 7 As shown, the sealing membrane 20 completely covers the hollow annular stent 10, so that blood can only pass through the inner cylinder of the hollow annular stent 10, thus preventing blood from passing through the hollow annular stent 10 and causing thrombosis.

[0054] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0055] In this embodiment of the invention, the hollow annular stent is installed inside the atrium; a sealing membrane is provided on the outside of the hollow annular stent and the lower half of its inner cylinder; the artificial valve is placed inside the lower half of the inner cylinder of the hollow annular stent. There is a very small probability that blood will form a thrombus during its passage through the hollow annular stent; even if a thrombus forms, it will be trapped within the hollow annular cavity of the stent, effectively avoiding the risk of thrombus blocking the blood vessel.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A double-layered annular atrial stent, characterized in that, The atrial stent includes: a hollow annular stent (10), a sealing membrane (20), and an artificial valve (30). The hollow annular stent (10) is installed in the atrium; A sealing membrane (20) is provided on the outside of the hollow ring stent (10) and the lower half of its inner cylinder, so that the atrium and ventricle are connected only through the inner cylinder of the hollow ring stent (10); The artificial valve (30) is located in the lower half of the inner cylinder of the hollow annular support (10); the hollow annular support (10) is provided with hooks (13) on the outside, which open and hook the original valve. The hollow ring support (10) is provided with a limiting spring (14) on its outside, which clamps the original valve.

2. The double-layer annular atrial stent as described in claim 1, characterized in that, The hollow ring support (10) is provided with elastic barbs (11) on the outside. The elastic barbs (11) are arranged around the outer circumference of the hollow ring support (10) and are driven into the inner wall of the atrium.

3. The double-layer annular atrial stent as described in claim 1, characterized in that, The hollow ring bracket (10) is provided with an elastic expansion bracket (12) on its outside, and the elastic expansion bracket (12) is provided with a sealing membrane (20).

4. The double-layer annular atrial stent as described in any one of claims 1 to 3, characterized in that, The sealing membrane (20) completely covers the hollow annular stent (10), so that blood can only pass through the inner cylinder of the hollow annular stent (10).

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