Auricular closure device

Abstract

The application relates to an auricle closure device for closing auricles, comprising: an elastic clip with a proximal end and a distal end; two clip arms arranged on opposite inner sides of the elastic clip, each of the clip arms being connected to a part of the elastic clip close to the distal end and extending in a direction close to the proximal end, the elastic clip driving the two clip arms to approach each other through self-closing to close the auricles; and an auxiliary elastic arm arranged between the elastic clip and the clip arms and used for providing a pressing force of the part of the clip arms close to the proximal end towards the auricles. The application has simple and ingenious structure, the part of the clip arms close to the proximal end is compensated by the auxiliary elastic arm, the clamping force of the part of the clip arms from the distal end to the proximal end on the auricles is substantially equal, the two clip arms keep parallel contact state under the elastic pre-tightening force of the elastic clip and the compensation pressing force of the auxiliary elastic arm, the two clip arms stably and reliably close each part of the auricles, and the complete closing effect on the auricles is ensured.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a cardiac auricle closure device. Background Technology

[0002] In clinical practice, it is often necessary to close target tissue to treat or prevent certain diseases. For example, closing the left atrial appendage can prevent stroke, and clamping the mitral valve can treat mitral regurgitation. Typically, a specialized delivery device is used to deliver the closure device into the body and open it, capturing the target tissue and clamping it between the two arms of the closure device to complete the closure.

[0003] Atrial fibrillation (AF) is a common arrhythmia characterized by irregular heartbeats. Non-valvular AF is a prevalent type of AF. The left atrial appendage is an accessory structure of the left atrium of the heart, appearing as a long, narrow, and tortuous tubular shape. In non-valvular AF, most thrombus formation is related to the left atrial appendage. Clinically, the entrance to the left atrial appendage is significantly widened in patients with AF, and the appendage loses its effective, regular contraction. The movement of the appendage walls makes it difficult to empty the left atrial appendage sufficiently, leading to blood pooling and thrombus formation. These thrombi can then enter the atria and then the circulatory system. These thrombi can block blood vessels in the brain or other parts of the body, causing stroke or other complications.

[0004] Currently, minimally invasive surgery to close the atrial appendage to prevent atrial appendage thrombosis is a widely used treatment for patients with atrial fibrillation. Generally, a delivery device is used to transport an atrial appendage clip through the incision to the patient's surgical site. The clip is then placed on the left atrial appendage, and its elasticity is used to close the left atrial appendage, thus completing the surgery.

[0005] However, in the relevant technologies, the atrial appendage clamp does not clamp the left atrial appendage securely enough when closing it, making it impossible for the atrial appendage clamp to completely close the left atrial appendage. Summary of the Invention

[0006] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application provides a cardiac atrial appendage closure device, which has a simple and ingenious structure, can stably and reliably clamp the cardiac atrial appendage, and ensure complete closure of the cardiac atrial appendage.

[0007] This application provides a cardiac atrial appendage closure device for closing the cardiac atrial appendage, comprising:

[0008] A flexible clip having a proximal end and a distal end;

[0009] Two clamping arms are arranged on the opposite inner sides of the elastic clamp, each of the clamping arms is connected to the elastic clamp near the distal end and extends in the direction of the proximal end, and the elastic clamp drives the two clamping arms to approach each other to close the auricle through self-closing.

[0010] An auxiliary elastic arm is arranged between the elastic clamp and the clamping arm to provide a pressing force of the clamping arm near the proximal end to the auricle.

[0011] In some embodiments, when the elastic clamp drives the two clamping arms to approach each other to close the auricle through self-closing, the elastic clamp compresses the auxiliary elastic arm to make the auxiliary elastic arm provide a pressing force of the clamping arm near the proximal end to the auricle.

[0012] In some embodiments, in the direction of the proximal end to the distal end of the elastic clamp, the pressing force of the auxiliary elastic arm to the clamping arm has a decreasing trend.

[0013] In some embodiments, the auxiliary elastic arm is arc-shaped, one end of the auxiliary elastic arm near the distal end is connected to the middle part of the elastic clamp, and the other end of the auxiliary elastic arm away from the distal end can abut against the clamping arm, and in the direction of the proximal end to the distal end of the elastic clamp, the slope of all points on the auxiliary elastic arm has an increasing trend.

[0014] In some embodiments, the tangent line of the other end of the auxiliary elastic arm away from the distal end is parallel to the clamping arm.

[0015] In some embodiments, the auxiliary elastic arm is arc-shaped, one end of the auxiliary elastic arm near the distal end can abut against the middle part of the elastic clamp, and the other end of the auxiliary elastic arm away from the distal end is connected to the clamping arm, and in the direction of the proximal end to the distal end of the elastic clamp, the slope of all points on the auxiliary elastic arm has a decreasing trend.

[0016] In some embodiments, the tangent line of the one end of the auxiliary elastic arm near the distal end is parallel to the inner side of the elastic clamp.

[0017] In some embodiments, the auxiliary elastic arm is arc-shaped, one end of the auxiliary elastic arm near the distal end is connected to the middle part of the clamping arm, and the other end of the auxiliary elastic arm away from the distal end can abut against the inner side of the elastic clamp, and in the direction of the proximal end to the distal end of the elastic clamp, the slope of all points on the auxiliary elastic arm has a decreasing trend.

[0018] In some embodiments, the one end of the auxiliary elastic arm near the distal end is tangent to the clamping arm.

[0019] In some embodiments, the elastic clip comprises a main body part and two pressing arms symmetrically arranged relative to the main body part, the two pressing arms are connected by the main body part, each of the pressing arms is connected to the clip arm by a bridging arm, the pressing arm, the bridging arm and the clip arm define a first U-shaped elastic part.

[0020] In some embodiments, the clip arm further extends a first extension arm in a direction close to the distal end, the pressing arm, the bridging arm and the first extension arm define a second U-shaped elastic part, the opening direction of the second U-shaped elastic part is opposite to that of the first U-shaped elastic part.

[0021] In some embodiments, the surfaces close to each other of the two clip arms each comprise a flat surface and an arc surface connected to the two sides of the flat surface, the two clip arms are clamped closed by the two flat surfaces.

[0022] According to the auricle closing device of the present application, at least the following beneficial effects are achieved:

[0023] After the auricle closing device of the present application is delivered to the vicinity of the auricle of a patient by a corresponding delivery device, the elastic clip is opened under the action of an external force, at this time, the two clip arms on the elastic clip are driven by the elastic clip to move away from each other and maintain an open state with a large included angle, then the elastic clip is moved to the auricle so that the auricle enters the clamping area formed by the two clip arms, at this time, the external force acting on the elastic clip is removed, and the elastic clip is closed under the action of its own elastic pre-tightening force, thereby driving the two clip arms to move close to each other, since the clip arms are connected to the part close to the distal end of the elastic clip and extend in a direction close to the proximal end, the parts close to the distal end of the two clip arms will clamp the auricle first, and then clamp the auricle from the distal end to the proximal end, during this process, the auxiliary elastic arm can provide a compression force towards the auricle to the part close to the proximal end of the clip arm, i.e. the elastic force compensation of the auxiliary elastic arm to the part close to the proximal end of the clip arm, so that the clamping force of the clip arm from the distal end to the proximal end on the auricle is roughly equal, thereby enabling the two clip arms to maintain a parallel contact state under the action of the elastic pre-tightening force of the elastic clip and the compensation compression force of the auxiliary elastic arm, so that the two clip arms stably and reliably close each part of the auricle, ensuring the complete closing effect of the auricle.

[0024] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented in accordance with the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the scope of the present application. The same reference numbers in different drawings identify the same components throughout the text. In the drawings:

[0026] Figure 1 Structure diagram of a hearing aid closure device according to some embodiments of the present application.

[0027] Figure 2 Structure diagram of a hearing aid closure device according to some embodiments of the present application. Figure 1 Structure diagram of a hearing aid closure device according to some embodiments of the present application.

[0028] Figure 3 Structure diagram of a hearing aid closure device according to some embodiments of the present application.

[0029] Figure 4 Structure diagram of a hearing aid closure device according to some embodiments of the present application. Figure 3 Structure diagram of a hearing aid closure device according to some embodiments of the present application.

[0030] Figure 5 Structure diagram of a hearing aid closure device according to some embodiments of the present application.

[0031] Figure 6 Structure diagram of a hearing aid closure device according to some embodiments of the present application. Figure 5 Structure diagram of a hearing aid closure device according to some embodiments of the present application.

[0032] Figure 7 Structure diagram of a hearing aid closure device according to some embodiments of the present application. Figure 5 Structure diagram of a hearing aid closure device according to some embodiments of the present application.

[0033] Reference signs: elastic clip 100; main body 110; pressing arm 120; clip arm 200; first extension arm 210; flat surface 220; arc surface 230; auxiliary elastic arm 300; bridge arm 400; first U-shaped elastic part 500; second U-shaped elastic part 600; proximal end la; distal end lb. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0035] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0036] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0038] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] It is to be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or intervening elements can be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element, or intervening elements can be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as can be used herein for purposes of description only and are not intended to be limiting.

[0040] At present, using minimally invasive surgery to close auricle of heart to prevent auricle of heart thrombosis is a relatively wide treatment method for atrial fibrillation patients. Generally, a delivery device is used to deliver an auricle of heart clamp to the operation position of the patient through the incision, and the auricle of heart clamp is sleeved on the left auricle of heart, and the elastic force of the auricle of heart clamp is used to clamp the left auricle of heart to complete the operation.

[0041] However, in the related art, when the auricle of heart clamp closes the left auricle of heart, the clamping of the left auricle of heart is not firm enough, and the clamping force applied to the left auricle of heart is not uniform enough, especially the clamping force received by the proximal end of the left auricle of heart is obviously smaller than the clamping force received by the distal end of the left auricle of heart, so that the auricle of heart clamp cannot completely achieve the closure of the left auricle of heart, and there will still be part of the blood entering the left auricle of heart to form thrombus, or the existing thrombus in the left auricle of heart falls off and enters the blood circulation system through the left auricle of heart to cause other pathological changes.

[0042] Based on the above problems, referring to Figure 1 and Figure 2 The present application provides an auricle of heart closure device for closing auricle of heart, which comprises an elastic clamp 100, two clamp arms 200 and two auxiliary elastic arms 300.

[0043] The elastic clamp 100 has a proximal end 1a and a distal end 1b. The two clamp arms 200 are arranged on the opposite inner sides of the elastic clamp 100, and each clamp arm 200 is connected to the part of the elastic clamp 100 close to the distal end 1b and extends in the direction close to the proximal end 1a. The elastic clamp 100 drives the two clamp arms 200 to approach each other to close the auricle of heart through its own closure.

[0044] The auxiliary elastic arms 300 are arranged between the elastic clamp 100 and the clamp arms 200, and are used to provide a pressing force towards the auricle of heart to the part of the clamp arms 200 close to the proximal end 1a.

[0045] It can be understood that in the present application, the auricle of heart can correspond to the left auricle of heart in the human heart. Of course, the auricle of heart closure device of the present application can also be used for closing other tissues of the human body, such as for clamping the mitral valve to treat mitral regurgitation, and the specific use is not limited.

[0046] It should be noted that in the present application, an auxiliary elastic arm 300 is arranged between each clamping arm 200 and the elastic clamp 100, and each auxiliary elastic arm 300 is used to provide a pressing force towards the auricle for the part of the corresponding clamping arm 200 close to the proximal end la.

[0047] In addition, it should be noted that in the present application, the two clamping arms 200 have the same structure and are linear structures. In the initial state of the auricle closure device when it is not in use, the elastic clamp 100 has an elastic pre-tightening force, and at this time, the two side arms of the elastic clamp 100 are substantially parallel. The two clamping arms 200 arranged on the opposite inner sides of the elastic clamp 100 are in an initial parallel state under the action of the elastic pre-tightening force of the elastic clamp 100, and at this time, the spacing between the two clamping arms 200 is small. At the same time, the auxiliary elastic arms 300 arranged between the elastic clamp 100 and the clamping arms 200 are in an initial stretched state and do not generate a pressing force on the clamping arms 200.

[0048] The auricle closure device of the present application can be delivered by a corresponding delivery device during the process of being delivered to the heart of a patient, and the auricle closure device is fixed as a whole on the delivery device (which can be a catheter instrument), and then the auricle closure device is delivered to the auricle by the delivery device. It should be noted that when the auricle closure device is delivered by the corresponding delivery device to the vicinity of the auricle of the patient, the elastic clamp 100 is opened under the action of an external force (which can be provided by a pulling rope or a pulling arm or other external force instruments arranged on the delivery device), that is, at this time, the two side walls of the elastic clamp 100 are substantially V-shaped. At this time, the two clamping arms 200 on the elastic clamp 100 are driven by the elastic clamp 100 to move away from each other and remain in an open state with a large spacing. Then the delivery device moves the elastic clamp 100 to the auricle and makes the auricle enter the clamping region formed by the two clamping arms 200, at which time, the external force acting on the elastic clamp 100 is removed, and the elastic clamp 100 is closed under the action of its own elastic pre-tightening force, thereby driving the two clamping arms 200 to move close to each other and close the auricle.

[0049] It should be understood that when the elastic clamp 100 drives the two clamping arms 200 to move close to each other to close the auricle, since the clamping arms 200 are connected to the part of the elastic clamp 100 close to the distal end lb and extend in the direction close to the proximal end la, the elastic pre-tightening force of the elastic clamp 100 on the clamping arms 200 gradually decreases from the distal end lb to the proximal end la, thereby making the clamping force of the clamping arms 200 on the auricle gradually decrease from the distal end lb to the proximal end la.

[0050] The parts of the two clamping arms 200 close to the distal end lb will preferentially move close under the action of the elastic pre-tightening force of the elastic clamp 100, thereby making the auricle parts at this position close up and down, and the two clamping arms 200 clamp the auricle from the distal end to the proximal end.

[0051] Since the auricle is tubular and has a certain thickness itself, when the clamping force applied by the clamping arms 200 to the auricle gradually decreases from the distal end 1b to the proximal end 1a, the distance between the two clamping arms 200 gradually increases in the direction from the distal end 1b to the proximal end 1a, that is, the two clamping arms 200 cannot maintain the initial parallel state. When the distance between the two clamping arms 200 at the position close to the proximal end 1a is greater than the thickness of the auricle at the position closed vertically, there is a problem that the auricle at the position cannot be closed vertically, and at this time, the two clamping arms 200 cannot completely clamp and close the auricle.

[0052] Based on this, the present application sets the corresponding auxiliary elastic arm 300 between the elastic clamp 100 and the clamping arm 200, when the elastic clamp 100 drives the two clamping arms 200 to close the auricle by its own closing action, the auxiliary elastic arm 300 can provide a pressing force towards the auricle to the part of the clamping arm 200 close to the proximal end 1a, that is, through the elastic compensation of the auxiliary elastic arm 300 to the part of the clamping arm 200 close to the proximal end 1a, the clamping force of the clamping arm 200 to the auricle from the distal end 1b to the proximal end 1a is roughly equal, so that the two clamping arms 200 maintain a parallel contact state under the action of the elastic pre-tightening force of the elastic clamp 100 and the compensation pressing force of the auxiliary elastic arm 300, so that the two clamping arms 200 stably and reliably close each part of the auricle, and ensure the complete closing effect of the auricle.

[0053] Obviously, the auricle closing device provided by the present application has a simple structure, by setting the corresponding auxiliary elastic arm 300 between the elastic clamp 100 and the clamping arm 200, when the two clamping arms 200 are close to each other and clamp and close the auricle in the direction from the distal end 1b to the proximal end 1a under the action of the elastic pre-tightening force of the elastic clamp 100, the auxiliary elastic arm 300 can provide a pressing force towards the auricle to the part of the clamping arm 200 close to the proximal end 1a, that is, through the elastic compensation of the auxiliary elastic arm 300 to the part of the clamping arm 200 close to the proximal end 1a, the clamping force of the clamping arm 200 to the auricle from the distal end 1b to the proximal end 1a is roughly equal, so that the two clamping arms 200 maintain a parallel contact state under the action of the elastic pre-tightening force of the elastic clamp 100 and the compensation pressing force of the auxiliary elastic arm 300, so that the two clamping arms 200 stably and reliably close each part of the auricle, and ensure the complete closing effect of the auricle.

[0054] In addition, in the present application, by connecting each of the clamping arms 200 to the elastic clip 100 near the distal end 1b and extending in the direction of the proximal end 1a, when the elastic clip 100 drives the two clamping arms 200 to close the auricle of the heart by its own closing action, the part near the distal end 1b of the two clamping arms 200 will first clamp the auricle of the heart, thereby ensuring that the entire auricle of the heart can be clamped and closed by the two clamping arms 200, avoiding the problem of the auricle of the heart slipping out and also avoiding the problem of incomplete closure of the auricle of the heart due to the fact that part of the auricle of the heart is not in the area between the two clamping arms 200.

[0055] In some embodiments of the present application, referring again to Figure 1 and Figure 2 When the elastic clip 100 drives the two clamping arms 200 to approach each other, the elastic clip 100 compresses the auxiliary elastic arm 300 to provide a pressing force to the part of the clamping arm 200 near the proximal end 1a towards the auricle of the heart.

[0056] Specifically, the elastic clip 100 includes a main body part 110 and two pressure holding arms 120 symmetrically arranged opposite to the main body part 110, and the main body part 110 and the two pressure holding arms 120 are integrally formed. The main body part 110 is in the shape of a U, one end of the auxiliary elastic arm 300 is connected to the middle part of the corresponding pressure holding arm 120, the other end of the auxiliary elastic arm 300 is a free end and extends in the direction of the proximal end 1a, and the free end can abut against the corresponding clamping arm 200. The clamping arm 200 is connected to the part of the corresponding pressure holding arm 120 near the distal end 1b and extends in the direction of the proximal end 1a.

[0057] In the embodiments of the present application, when the elastic clip 100 drives the two clamping arms 200 to approach each other to close the auricle of the heart under the action of its own elastic pre-tightening force, because the auxiliary elastic arm 300 has a free end that can abut against the corresponding clamping arm 200, the pressure holding arm 120 on the elastic clip 100 will squeeze the auxiliary elastic arm 300, so that the auxiliary elastic arm 300 is elastically deformed. Since the clamping arm 200 is connected to the part of the elastic clip 100 near the distal end 1b and extends in the direction of the proximal end 1a, the compression elastic force generated by the auxiliary elastic arm 300 pushes the clamping arm 200 to move in the direction of the auricle of the heart, thereby providing a pressing force to the part of the clamping arm 200 near the proximal end 1a towards the auricle of the heart.

[0058] It is not difficult to understand that through the above setting, when the elastic clamp 100 drives the two clamp arms 200 to approach each other by closing itself, the elastic clamp 100 compresses the auxiliary elastic arm 300 in a manner, so that the auxiliary elastic arm 300 provides a compression force to the part of the clamp arm 200 close to the proximal end 1a towards the auricle, without the need to set an additional power source, the auxiliary elastic arm 300 can be compressed, thereby the auxiliary elastic arm 300 compensates the elastic force to the part of the clamp arm 200 close to the proximal end 1a, so that the clamp closing force of the clamp arm 200 from the distal end 1b to the part close to the proximal end 1a to the auricle is roughly equal, so that the two clamp arms 200 keep parallel contact state under the action of the elastic pre-tightening force of the elastic clamp 100 and the compensation compression force of the auxiliary elastic arm 300, so that the two clamp arms 200 stably and reliably close each part of the auricle, and ensure the complete closing effect on the auricle.

[0059] In some embodiments of the present application, referring to Figure 1 and Figure 2 , along the direction of the proximal end 1a to the distal end 1b of the elastic clamp 100, the compression force of the auxiliary elastic arm 300 to the clamp arm 200 shows a decreasing trend.

[0060] As described before, the clamp closing force applied to the auricle by the clamp arm 200 relying on the elastic pre-tightening force of the elastic clamp 100 gradually decreases from the distal end 1b to the proximal end 1a, along the direction of the distal end 1b to the proximal end 1a, the distance between the two clamp arms 200 will gradually increase, so that the two clamp arms 200 cannot keep the initial parallel state.

[0061] Based on this, the embodiments of the present application make the compression force of the auxiliary elastic arm 300 to the clamp arm 200 show a decreasing trend along the direction of the proximal end 1a to the distal end 1b of the elastic clamp 100, so that the closer the clamp arm 200 is to the proximal end 1a, the greater the elastic compression force of the auxiliary elastic arm 300, so that the overall elastic force on each part of the clamp arm 200 is more uniform.

[0062] The greater the elastic compression force of the auxiliary elastic arm 300 to the clamp arm 200, the closer the two clamp arms 200 can approach each other, that is, along the direction of the proximal end 1a to the distal end 1b of the elastic clamp 100, the smaller the movement displacement of the clamp arm 200 caused by the pushing of the auxiliary elastic arm 300, so that the two clamp arms 200 recover from the non-parallel state to the initial parallel state, and keep the state of clamping and closing all parts of the auricle under the joint action of the elastic compression force of the auxiliary elastic arm 300 and the elastic pre-tightening force of the elastic clamp 100, thereby ensuring the complete closing effect on the auricle.

[0063] In some embodiments of the present application, referring to Figure 1 and Figure 2The auxiliary elastic arm 300 is arc-shaped, one end of the auxiliary elastic arm 300 close to the distal end 1b is connected to the middle part of the elastic clamp 100, and the other end of the auxiliary elastic arm 300 away from the distal end 1b can abut against the clamp arm 200. In the direction from the proximal end 1a to the distal end 1b of the elastic clamp 100, the slope of all points on the auxiliary elastic arm 300 shows an increasing trend.

[0064] Specifically, the elastic clamp 100 includes a main body part 110 and two pressing arms 120 symmetrically arranged on the main body part 110, and the main body part 110 and the two pressing arms 120 are integrally formed. The main body part 110 is U-shaped. The auxiliary elastic arm 300 has a connecting end close to the distal end 1b and a free end away from the distal end 1b. The connecting end of the auxiliary elastic arm 300 is connected to the middle part of the corresponding pressing arm 120, and the free end of the auxiliary elastic arm 300 extends in the direction close to the proximal end 1a and can abut against the corresponding clamp arm 200. It can also be understood that the free end of the auxiliary elastic arm 300 directly contacts or has a small gap with the clamp arm 200. The clamp arm 200 is connected to the part of the corresponding pressing arm 120 close to the distal end 1b through the bridging arm 400 and extends in the direction close to the proximal end 1a.

[0065] It is not difficult to understand that the auxiliary elastic arm 300 is an arc-shaped elastic arm. In the direction from the proximal end 1a to the distal end 1b of the elastic clamp 100, the slope of all points on the auxiliary elastic arm 300 shows an increasing trend, that is, the bending direction of the auxiliary elastic arm 300 is towards the corresponding pressing arm 120.

[0066] When the elastic clamp 100 drives the two clamp arms 200 to close the auricle of the heart under the action of the elastic pre-tightening force, the two pressing arms 120 move close to each other. Since the auxiliary elastic arm 300 has a free end that can abut against the corresponding clamp arm 200, the pressing arm 120 on the elastic clamp 100 will push the free end of the auxiliary elastic arm 300 to abut against the corresponding clamp arm 200. With the movement of the pressing arm 120, the pressing arm 120 extrudes the auxiliary elastic arm 300, so that the auxiliary elastic arm 300 is compressed and deformed. In this way, the compression elastic force generated by the auxiliary elastic arm 300 pushes the clamp arm 200 to move towards the auricle of the heart, thereby providing the part of the clamp arm 200 close to the proximal end 1a with a compression force towards the auricle of the heart.

[0067] It needs to be understood that, since the auxiliary elastic arm 300 is arc-shapedly extended from the middle part of the pressing arm 120 to the part close to the proximal end 1a of the clamping arm 200, and the free end of the auxiliary elastic arm 300 will preferentially abut against the part close to the proximal end 1a of the clamping arm 200, so that the auxiliary elastic arm 300 first contacts and pushes the part close to the proximal end 1a of the clamping arm 200, and then gradually contacts and pushes the clamping arm 200 from the proximal end to the distal end, so that the part with a larger distance between the two clamping arms 200 is pushed by the auxiliary elastic arm 300 to a larger displacement, so that the two clamping arms 200 gradually recover to the initial parallel state, thereby ensuring the complete closing effect on the cardiac auricle.

[0068] In addition, in the above embodiment, referring to Figure 1 and Figure 2 , the tangent line of the end of the auxiliary elastic arm 300 away from the distal end 1b is parallel to the clamping arm 200. In this way, the contact mode of the auxiliary elastic arm 300 and the clamping arm 200 can be linear contact or surface contact, the contact area between the auxiliary elastic arm 300 and the clamping arm 200 when the auxiliary elastic arm 300 is compressed is increased, the part with a larger relative distance between the two clamping arms 200 is more effectively pushed to move closer to each other, and the two clamping arms 200 recover to the initial parallel state more quickly, thereby stably and reliably closing the cardiac auricle. At the same time, the auxiliary elastic arm 300 can avoid directly pushing the clamping arm 200 in point contact, thereby avoiding damage to the auxiliary elastic arm 300 and the clamping arm 200 due to a larger stress.

[0069] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the auxiliary elastic arm 300 is arc-shaped, the end of the auxiliary elastic arm 300 close to the distal end 1b can abut against the middle part of the elastic clamp 100, the end of the auxiliary elastic arm 300 away from the distal end 1b is connected to the clamping arm 200, and the slope of all points on the auxiliary elastic arm 300 in the direction from the proximal end 1a to the distal end 1b of the elastic clamp 100 shows a decreasing trend. At the same time, the tangent line of the end of the auxiliary elastic arm 300 close to the distal end 1b is parallel to the inner side of the elastic clamp 100.

[0070] Specifically, the elastic clamp 100 includes a main body part 110 and two pressing arms 120 symmetrically arranged opposite to the main body part 110, and the main body part 110 and the two pressing arms 120 are integrally formed. The main body part 110 is U-shaped. The end of the auxiliary elastic arm 300 close to the distal end 1b is a free end, and the end of the auxiliary elastic arm 300 away from the distal end 1b is a connecting end.

[0071] That is, the middle part of the auxiliary elastic arm 300 can abut against the corresponding holding arm 120, and the connecting end of the auxiliary elastic arm 300 is connected to the part of the clamping arm 200 close to the proximal end 1a. It can also be understood that the free end of the auxiliary elastic arm 300 directly contacts or has a small spacing with the clamping arm 200. The clamping arm 200 is connected to the part of the corresponding holding arm 120 close to the distal end 1b through the bridging arm 400 and extends in the direction close to the proximal end 1a. At this time, the auxiliary elastic arm 300 extends in an arc shape from the middle part of the holding arm 120 to the part of the clamping arm 200 close to the proximal end 1a, and the bending direction of the auxiliary elastic arm 300 is towards the corresponding clamping arm 200.

[0072] Therefore, when the elastic clamp 100 drives the two clamping arms 200 to close the auricle of the heart under the elastic pre-tightening force, the holding arm 120 first contacts and compresses the auxiliary elastic arm 300, and the compression elastic force of the auxiliary elastic arm 300 is transmitted to the connecting end, so as to first push the part of the clamping arm 200 close to the proximal end 1a, and then gradually push the clamping arm 200 from the proximal end to the distal end. The part with a larger distance between the two clamping arms 200 is pushed by the auxiliary elastic arm 300 to a larger displacement, so that the two clamping arms 200 gradually recover to the initial parallel state, thereby ensuring the complete closing effect on the auricle of the heart.

[0073] Similarly, in the embodiments shown in Figure 3 and Figure 4 , the tangent line at the end of the auxiliary elastic arm 300 close to the distal end 1b is parallel to the inner side of the elastic clamp 100, that is, the tangent line at the free end of the auxiliary elastic arm 300 is parallel to the corresponding holding arm 120. In this way, the contact mode between the auxiliary elastic arm 300 and the corresponding holding arm 120 is linear contact or surface contact, the contact area between the auxiliary elastic arm 300 and the holding arm 120 is increased when the auxiliary elastic arm 300 is compressed, and the parts with a larger relative distance between the two clamping arms 200 are more effectively pushed to move close to each other. The two clamping arms 200 can also be recovered to the initial parallel state more quickly, stably and reliably close the auricle of the heart.

[0074] In some embodiments of the present application, referring to Figure 5 , Figure 6 and Figure 7 , the auxiliary elastic arm 300 is arc-shaped, the end of the auxiliary elastic arm 300 close to the distal end 1b is connected to the middle part of the clamping arm 200, the end of the auxiliary elastic arm 300 away from the distal end 1b can abut against the inner side of the elastic clamp 100, and the slope of all points on the auxiliary elastic arm 300 decreases in the direction from the proximal end 1a to the distal end 1b of the elastic clamp 100. The end of the auxiliary elastic arm 300 close to the distal end 1b is tangent to the clamping arm 200.

[0075] Specifically, the elastic clip 100 comprises a main body part 110 and two pressing arms 120 symmetrically arranged opposite to the main body part 110, and the main body part 110 and the two pressing arms 120 are integrally formed. The main body part 110 is in a U shape. The auxiliary elastic arm 300 has one end close to the distal end 1b as a connecting end, and the other end away from the distal end 1b as a free end. At this time, the auxiliary elastic arm 300 is arc-shapedly extended from the middle part of the clamping arm 200 of the pressing arm 120 to the part close to the proximal end 1a of the pressing arm 120, and the bending direction of the auxiliary elastic arm 300 is towards the corresponding pressing arm 120.

[0076] Thus, when the elastic clip 100 drives the two clamping arms 200 to close the auricle of heart under the action of the elastic pre-tightening force, the pressing arm 120 first contacts and compresses the free end of the auxiliary elastic arm 300, and the compression elastic force of the auxiliary elastic arm 300 is transmitted to the connecting end, thereby pushing the middle part of the clamping arm 200 to the part close to the proximal end 1a of the clamping arm 200 to be close to the opposite clamping arm 200, so that the two clamping arms 200 are better restored to the initial parallel state, thereby ensuring the complete closing effect on the auricle of heart.

[0077] In addition, in the embodiments shown in Figure 5 and Figure 6 , by making the end of the auxiliary elastic arm 300 close to the distal end 1b tangent to the clamping arm 200, i.e. the connecting end of the auxiliary elastic arm 300 is tangent to the clamping arm 200, in this way, the clamping arm 200 and the auxiliary elastic arm 300 can be prevented from being damaged by excessive stress.

[0078] In some embodiments of the present application, referring to Figure 5 , Figure 6 and Figure 7 , the elastic clip 100 comprises a main body part 110 and two pressing arms 120 symmetrically arranged opposite to the main body part 110, and the two pressing arms 120 are connected through the main body part 110, and each pressing arm 120 is connected to the clamping arm 200 through the bridging arm 400, and the pressing arm 120, the bridging arm 400 and the clamping arm 200 define a first U-shaped elastic part 500.

[0079] Specifically, the main body part 110, the two pressing arms 120, the two bridging arms 400 and the two clamping arms 200 are integrally formed. The bridging arm 400 is an arc-shaped elastic structure.

[0080] It can be understood that the first U-shaped elastic part 500 defined by the pressing arm 120, the bridging arm 400 and the clamping arm 200 can reduce the stress on the elastic clip 100 and the whole auricle of heart closing device, and improve the reliability and structural stability of the elastic clip 100 and the whole auricle of heart closing device.

[0081] In some embodiments of the present application, the clamping arm 200 further extends a first extension arm 210 in a direction close to the distal end 1b, the pressing arm 120, the bridging arm 400 and the first extension arm 210 define a second U-shaped elastic part 600, and the opening direction of the second U-shaped elastic part 600 is opposite to the opening direction of the first U-shaped elastic part 500.

[0082] It is not difficult to understand that the opening of the first U-shaped elastic part 500 is towards the proximal end 1a, and the opening of the second U-shaped elastic part 600 is towards the distal end 1b. That is, the first U-shaped elastic part 500 defined by the pressing arm 120, the bridging arm 400 and the clamping arm 200 extends along the proximal end 1a, and the second U-shaped elastic part 600 defined by the pressing arm 120, the bridging arm 400 and the first extension arm 210 extends along the distal end 1b. In this way, the stress on the elastic clamp 100 and the entire auricle closing device from the distal end 1b to the proximal end 1a is reduced as much as possible, and the reliability and structural stability of the elastic clamp 100 and the entire auricle closing device are further improved.

[0083] In some embodiments of the present application, referring to Figure 5 and Figure 6 , the side close to each other of the two clamping arms 200 includes a flat surface 220 and an arc surface 230 connected smoothly to both ends of the flat surface 220. It is not difficult to understand that the two clamping arms 200 hold and close the auricle through the two flat surfaces 220, ensuring the complete closing effect on the auricle, and the two arc surfaces 230 connected smoothly to both ends of the flat surface 220 make the two ends of the flat surface 220 arc transition, thereby eliminating the sharp end area of the overall structure of the clamping arm 200, avoiding the sharp end area to pierce and damage the auricle, and improving the overall reliability of the auricle closing device.

[0084] In addition, in some embodiments of the present application, the auricle closing device further includes a fabric sleeve for wrapping and covering the overall contour of the auricle closing device, that is, the elastic clamp 100, the two clamping arms 200 and the two auxiliary elastic arms 300 are integrally encapsulated in the fabric sleeve, and when the elastic clamp 100 is in the initial and unused initial state, the fabric sleeve is supported by the contour of the auricle closing device to form a U shape.

[0085] Specifically, the fabric sleeve can be made of resin material or synthetic fiber material. Considering that the elastic clamp 100 and the two clamping arms 200 are made of metal material, the fabric sleeve is arranged to effectively avoid the structure parts of the auricle closing device from directly contacting the auricle, and to avoid the auricle from being damaged by hardness.

[0086] In addition, considering that the fabric sleeve wraps around the whole profile of the auricular appendage closure device, the end of the fabric sleeve will have some redundant fabric. Based on this, the redundant fabric on the fabric sleeve can be inserted into the U-shaped space of the second U-shaped elastic part 600 with the opening facing the distal end 1b, so as to prevent the redundant fabric from affecting the tissue growth near the auricular appendage.

[0087] In addition, the fabric sleeve is provided with a plurality of micropores along the surface profile thereof. When the auricular appendage closure device clamps and closes the auricular appendage for a long time, the tissue near the auricular appendage is also easy to climb and grow on the surface of the fabric sleeve through the micropores, that is, the tissue near the auricular appendage is more likely to grow, and the influence of the whole auricular appendage closure device on the growth of the tissue near the auricular appendage of the patient's heart is reduced.

[0088] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A cardiac auricle closure device for closing the cardiac auricle, characterized in that, include: A flexible clip having a proximal end and a distal end; Two clamping arms are located on opposite inner sides of the elastic clamp. Each clamping arm is connected to the part of the elastic clamp near the distal end and extends in the direction near the proximal end. The elastic clamp closes itself, causing the two clamping arms to move closer to each other to close the auricle. An auxiliary elastic arm is disposed between the elastic clamp and the clamp arm, for providing a clamping force toward the auricle on the portion of the clamp arm near the proximal end; Along the direction from the proximal end to the distal end of the elastic clamp, the clamping force of the auxiliary elastic arm on the clamp arm tends to decrease.

2. The atrial appendage closure device according to claim 1, characterized in that, When the elastic clamp closes itself, causing the two clamping arms to move closer to each other, the elastic clamp compresses the auxiliary elastic arm, so that the auxiliary elastic arm provides a pressing force toward the auricle on the part of the clamping arm near the proximal end.

3. The atrial appendage closure device according to claim 1, characterized in that, The auxiliary elastic arm is arc-shaped. The end of the auxiliary elastic arm near the distal end is connected to the middle of the elastic clamp, and the end of the auxiliary elastic arm away from the distal end can abut against the clamp arm. Along the direction from the proximal end to the distal end of the elastic clamp, the slope of all points on the auxiliary elastic arm tends to increase.

4. The atrial appendage closure device according to claim 3, characterized in that, The tangent at the end of the auxiliary elastic arm furthest from the distal end is parallel to the clamping arm.

5. The atrial appendage closure device according to claim 1, characterized in that, The auxiliary elastic arm is arc-shaped. The end of the auxiliary elastic arm near the distal end can abut against the middle of the elastic clamp. The end of the auxiliary elastic arm away from the distal end is connected to the clamp arm. Along the direction from the proximal end to the distal end of the elastic clamp, the slope of all points on the auxiliary elastic arm decreases.

6. The atrial appendage closure device according to claim 5, characterized in that, The tangent at the end of the auxiliary elastic arm near the distal end is parallel to the inner side of the elastic clip.

7. The atrial appendage closure device according to claim 1, characterized in that, The auxiliary elastic arm is arc-shaped. The end of the auxiliary elastic arm near the distal end is connected to the middle of the clamping arm, and the end of the auxiliary elastic arm away from the distal end can abut against the inner side of the elastic clamp. Along the direction from the proximal end to the distal end of the elastic clamp, the slope of all points on the auxiliary elastic arm decreases.

8. The atrial appendage closure device according to claim 7, characterized in that, The end of the auxiliary elastic arm near the distal end is tangent to the clamping arm.

9. The atrial appendage closure device according to claim 1, characterized in that, The elastic clamp includes a main body and two pressing arms symmetrically arranged relative to the main body. The two pressing arms are connected through the main body, and each pressing arm is connected to the clamp arm through a bridging arm. The pressing arms, the bridging arms, and the clamp arm define a first U-shaped elastic part.

10. The atrial appendage closure device according to claim 9, characterized in that, The clamping arm also extends a first extension arm in a direction close to the distal end. The clamping arm, the bridging arm, and the first extension arm define a second U-shaped elastic portion. The opening direction of the second U-shaped elastic portion is opposite to the opening direction of the first U-shaped elastic portion.

11. The atrial appendage closure device according to claim 1, characterized in that, The surfaces of the two clamping arms that are close to each other each include a flat surface and an arcuate surface that is smoothly connected to both sides of the flat surface. The two clamping arms clamp and close the auricle of the heart through the two flat surfaces.

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