Heart tissue closure device

Abstract

The application provides a heart tissue closing device, and relates to the field of medical instruments.The heart tissue closing device comprises a first clamping arm, a second clamping arm and a locking part, the first clamping arm comprises a first end and a second end, the second clamping arm comprises a first end and a second end, the first clamping arm and the second clamping arm can rotate around the first ends of the two to realize opening and closing of the second end of the first clamping arm and the second end of the second clamping arm, and the locking part acts on the first clamping arm and the second clamping arm to prevent the first clamping arm and the second clamping arm from opening.The heart tissue closing device of the application realizes the closing of heart tissue through the clamping of the first clamping arm and the second clamping arm, and keeps the first clamping arm and the second clamping arm in the closed state through the locking part, the V-shaped opening structure breaks through the limitation of the ligation mode, does not need to be sleeved from the top end of the auricle, the opening clamping arm is inserted along the root of the auricle to be closed, and the closing operation is more convenient to be implemented at the root of the auricle from various angles.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a cardiac tissue closure device. BACKGROUND

[0002] Atrial fibrillation is one of the most common arrhythmias in clinical practice, and the consequences of stroke caused by atrial fibrillation are very serious, with a mortality and disability rate of 70%. For patients with valvular atrial fibrillation, 57% of atrial thrombi come from the left atrial appendage, and for patients with non-valvular atrial fibrillation, 90% of left atrial thrombi come from the left atrial appendage. Even after recovery of sinus rhythm, left atrial appendage contraction depression can still form thrombi. The left atrial appendage is located above the atrium, left to the pulmonary artery and ascending aorta, between the left superior pulmonary vein and the mitral annulus, and has a narrow, curved tubular blind end structure.

[0003] There are mainly two methods for preventing ischemic stroke of cardiac origin in clinical practice: drug therapy and surgical intervention of the atrial appendage.

[0004] Among them, drug therapy, such as warfarin, but there is a high risk of bleeding with warfarin, and it is difficult to apply clinically; in addition, warfarin can also cause osteoporosis and soft tissue necrosis.

[0005] Another method is to intervene in the atrial appendage during heart surgery, which is divided into surgical operation to handle the atrial appendage and surgical instruments to handle the atrial appendage. The common way of surgical intervention is to directly remove, suture and ligate the atrial appendage. The main disadvantage of this method is that the success rate of the operation is low, and there is a high risk of operation. There is a high risk of bleeding at the suture point, and there is a risk of tearing and loosening of the ligature line. Previous studies have shown that the success rate of surgical operation to handle the atrial appendage is about 80%, and there are many adverse events after the operation. Surgical instruments handle, such as the Lariat system, which is composed of an outer sheath, an inner sheath, a push rod, a lasso and a ligature line. The head end of the sheath is inserted into the chest cavity through an intercostal incision, and the lasso and ligature line are inserted into the body through the sheath. The lasso and ligature line released in the body segment are in a ring shape, which is deployed outside the atrial appendage, and is sleeved through the top of the atrial appendage, and is ligated by the ligature line at the root of the atrial appendage. After completion, the system is withdrawn, and finally the atrial appendage is blocked by ligation.

[0006] Because the lasso of the system is in a ring shape, during the operation, the lasso is sleeved from the top of the atrial appendage, moves along the outer wall of the atrial appendage to the root of the atrial appendage, and the operation is relatively complex. SUMMARY

[0007] (I) Technical problems solved

[0008] In view of the shortcomings of the prior art, the present application provides a cardiac tissue closure device, which solves the problem that the existing surgical instrument handling process uses a lasso method, which is sleeved from the top of the atrial appendage, moves along the outer wall of the atrial appendage to the root of the atrial appendage, and the operation is relatively complex.

[0009] (II) Technical Solution

[0010] To achieve the above object, the present application is implemented by the following technical solution:

[0011] A cardiac tissue closure device, comprising:

[0012] a first clamp arm comprising a first end and a second end;

[0013] a second clamp arm comprising a first end and a second end, wherein the first clamp arm and the second clamp arm are rotatable about the first ends thereof to achieve opening and closing of the second ends of the first clamp arm and the second clamp arm;

[0014] a locking portion acting on the first clamp arm and the second clamp arm to prevent the first clamp arm and the second clamp arm from opening.

[0015] Preferably, the locking portion comprises:

[0016] a rope connecting the second end of the first clamp arm and the second end of the first clamp arm to prevent the first clamp arm and the second clamp arm from opening.

[0017] Preferably, the rope comprises:

[0018] a first rope, a second end of the first rope being fixedly connected to the second end of the first clamp arm, and the first rope extending along an inner wall of the first clamp arm to the first end of the first clamp arm;

[0019] a second rope, a second end of the second rope being fixedly connected to the second end of the second clamp arm, and the second rope extending along an inner wall of the second clamp arm to the first end of the second clamp arm;

[0020] a first end of the first rope being fixedly connected to a first end of the second rope.

[0021] Preferably, the rope comprises:

[0022] a first rope, a second end of the first rope being fixedly connected to the second end of the second clamp arm, and a first end of the first rope extending along an inner wall of the first clamp arm to the first end of the first clamp arm via the second end of the first clamp arm;

[0023] a second rope, a second end of the second rope being fixedly connected to the second end of the first clamp arm, and a first end of the second rope extending along an inner wall of the second clamp arm to the first end of the second clamp arm via the second end of the second clamp arm;

[0024] The first end of the first rope is fixedly connected with the first end of the second rope.

[0025] Preferably, the first end of the first clamping arm and the first end of the second clamping arm rotate.

[0026] Preferably, the locking portion comprises:

[0027] A blocking ring member, through which the first clamping arm and the second clamping arm are acted on to prevent the first clamping arm and the second clamping arm from being opened.

[0028] Preferably, the blocking ring member comprises:

[0029] A first clamping member, which is in sliding connection with the first clamping arm;

[0030] A second clamping member, which is in sliding connection with the second clamping arm;

[0031] The first clamping member and the second clamping member are oppositely arranged, and the first clamping arm and the second clamping arm are located between the first clamping member and the second clamping member, and are clamped by the first clamping member and the second clamping member to prevent the first clamping arm and the second clamping arm from being opened.

[0032] Preferably, the inner wall of the first clamping member and the second clamping member is provided with a first barb structure.

[0033] The outer wall of the first clamping arm and the second clamping arm is provided with a second barb structure, and the first barb structure and the second barb structure cooperate to prevent the first clamping arm and the second clamping arm from being opened.

[0034] Preferably, the first clamping arm and the second clamping arm are externally sleeved with a protective sleeve.

[0035] (Three) beneficial effects

[0036] The present application provides a heart tissue closure device. Compared with the prior art, the following beneficial effects are achieved:

[0037] The cardiac tissue closure device of the present invention achieves closure of cardiac tissue by clamping with a first clamping arm and a second clamping arm. The first clamping arm and the second clamping arm can rotate relative to each other around one end to achieve opening and closing of the other end. The opened first clamping arm and the second clamping arm clamp the cardiac tissue, and the first clamping arm and the second clamping arm are kept in a closed state by a locking portion, thereby maintaining the clamping state of the cardiac tissue by the first clamping arm and the second clamping arm. The V-shaped opening structure at the head end of the device breaks through the limitations of the ligation method. There is no need to insert from the top of the atrial appendage. The opened clamping arm is inserted along the base of the atrial appendage for closure. The closure operation is more convenient to perform at the base of the atrial appendage from all angles, avoiding the complex operation of ligation and improving the accuracy of the operation. In addition, the locking portion maintains the closed state of the first clamping arm and the second clamping arm, which can maintain a stable closed state, ensuring that the cardiac tissue can still be completely sealed when the heart tissue shrinks and its thickness decreases. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention using the first locking portion from a first viewing angle;

[0040] Figure 2 This is a schematic diagram of the overall structure of an embodiment of the present invention using the first locking portion from a second viewing angle;

[0041] Figure 3 This is a schematic diagram of the overall structure of the embodiment of the present invention using the first locking portion from a third perspective;

[0042] Figure 4 This is an exploded view of the overall structure of the embodiment of the present invention using the first locking portion from a first viewing angle;

[0043] Figure 5 This is an exploded view of the overall structure of the embodiment of the present invention using the first locking portion from a second viewing angle;

[0044] Figure 6 This is an exploded view of the overall structure of the embodiment of the present invention using the first locking portion from a third viewing angle;

[0045] Figure 7 This is a cross-sectional view of an embodiment of the present invention adopting the first rope winding method;

[0046] Figure 8A cross-sectional view of the second rope winding mode adopted by the embodiment of the present application;

[0047] Figure 9 An overall structure schematic diagram of the first perspective of the second locking part adopted by the embodiment of the present application;

[0048] Figure 10 An overall structure schematic diagram of the second perspective of the second locking part adopted by the embodiment of the present application;

[0049] Figure 11 An overall structure schematic diagram of the third perspective of the second locking part adopted by the embodiment of the present application;

[0050] Figure 12 A cross-sectional view of the second locking part adopted by the embodiment of the present application;

[0051] Figure 13 An overall structure schematic diagram of the third perspective of the second locking part adopted by the embodiment of the present application;

[0052] Figure 14 An overall structure schematic diagram of the fourth perspective of the second locking part adopted by the embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the embodiment of the present application more clear, the technical scheme in the embodiment of the present application is described clearly and completely. Obviously, the described embodiment is a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiment in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0054] The embodiment of the present application provides a heart tissue closing device, which solves the problem that the existing surgical instrument processing process needs to put a ligature into heart tissue, and the operation is relatively complex.

[0055] The technical scheme in the embodiment of the present application is to solve the above problem, and the general idea is as follows:

[0056] The first clamping arm 1 and the second clamping arm 2 are relatively rotatable around one end, and can realize opening and closing of the other end. The first clamping arm 1 and the second clamping arm 2 after opening clamp the heart tissue, and the locking part is used to limit the opening of the first clamping arm 1 and the second clamping arm 2, so as to maintain the closed state of the first clamping arm 1 and the second clamping arm 2 to the heart tissue.

[0057] In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings in the specification and the specific embodiments. In order to better understand the above technical scheme, the above technical scheme will be described in detail in combination with the drawings in the specification and the specific embodiments.

[0058] The present application provides a heart tissue closure device, such as Figures 1-14 as shown, comprising:

[0059] The first clamping arm 1, the second clamping arm 2 and the locking part 3, for the convenience of description, one end of the first clamping arm 1 is named as the first end, the other end is named as the second end; one end of the second clamping arm 2 is named as the first end, the other end is named as the second end, and the first clamping arm 1 and the second clamping arm 2 can rotate around the first end of both to achieve the opening and closing of the second end of the first clamping arm 1 and the second end of the second clamping arm 2; that is, the first clamping arm 1 and the second clamping arm 2 can be opened to form a V-shaped opening structure, and the top of the V-shaped structure is the first end of the first clamping arm 1 and the second clamping arm 2;

[0060] The locking part 3 acts on the first clamping arm 1 and the second clamping arm 2 to prevent the first clamping arm 1 and the second clamping arm 2 from opening.

[0061] Specifically, the material of the first clamping arm 1 and the second clamping arm 2 can be implantable metal, such as stainless steel, cobalt-based alloy, platinum-iridium alloy, nickel-titanium alloy, magnesium-based alloy, iron-based alloy, etc., or high polymer material, such as polytetrafluoroethylene, nylon, polyester, polyamide, polylactic acid, PGA, PDO, etc.

[0062] In the implementation process of the above embodiment, the heart tissue is closed by the clamping of the first clamping arm 1 and the second clamping arm 2, the first clamping arm 1 and the second clamping arm 2 can rotate relatively around one end to achieve the opening and closing of the other end, and the opened first clamping arm 1 and the second clamping arm 2 clamp the heart tissue, and the locking part is used to limit the opening of the first clamping arm 1 and the second clamping arm 2, thereby maintaining the clamping force of the first clamping arm 1 and the second clamping arm 2 on the heart tissue. Through the opening structure, the limitation of the ligation method is broken, and it is not necessary to put the heart tissue into the ligation line. Through the V-shaped opening structure, the closure operation on the bottom of the heart tissue can be more conveniently implemented from various angles. Moreover, the locking part can continuously provide stable clamping force to ensure that the heart tissue can be completely closed when the thickness of the heart tissue decreases.

[0063] In addition, the existing ligation by ligation line has a high risk of bleeding due to the thin ligation line, and the heart tissue is a long and narrow cavity, which is easily folded during ligation, and has a risk of recanalization. The first clamping arm 1 and the second clamping arm 2 of the present application can clamp the heart tissue to prevent the recanalization risk caused by the folding of the heart tissue during ligation.

[0064] The present application provides two structures of the locking part, which will be described in detail as follows:

[0065] The first is achieved by rope winding, and the rope winding achieves the prevention of the first clamping arm 1 and the second clamping arm 2 from being opened; the rope used in the present application is a wire with a certain length and lightness, such as a rope made of fiber or a rope made of steel wire.

[0066] Based on the rope winding, the present application provides two rope winding modes, which are as follows:

[0067] In the specific implementation process, the first rope winding mode is as shown in the drawing, the rope includes a first rope 301 and a second rope 302, wherein the second end of the first rope 301 is fixedly connected with the second end of the first clamping arm 1, and the first rope 301 extends along the inner wall of the first clamping arm 1 to the first end of the first clamping arm 1; Figures 4-7 the second end of the second rope 302 is fixedly connected with the second end of the second clamping arm 2, and the second rope 302 extends along the inner wall of the second clamping arm 2 to the first end of the second clamping arm 2;

[0068] the first end of the first rope 301 is fixedly connected with the first end of the second rope 302.

[0069] That is, the first clamping arm 1 and the second clamping arm 2 are closed by the force formed by the first rope 301 and the second rope 302, so as to avoid the opening of the first clamping arm 1 and the second clamping arm 2, which is simple in structure and convenient to operate.

[0070] In the specific implementation process, the second rope winding mode is as shown in the drawing, the rope includes a first rope 301 and a second rope 302, the second end of the first rope 301 is fixedly connected with the second end of the second clamping arm 2, and the first end of the first rope 301 extends along the inner wall of the first clamping arm 1 to the first end of the first clamping arm 1 through the second end of the first clamping arm 1;

[0071] Figure 8 the second end of the second rope 302 is fixedly connected with the second end of the first clamping arm 1, and the first end of the second rope 302 extends along the inner wall of the second clamping arm 2 to the first end of the second clamping arm 2 through the second end of the second clamping arm 2;

[0072] the first end of the first rope 301 is fixedly connected with the first end of the second rope 302.

[0073] the first end of the first rope 301 is fixedly connected with the first end of the second rope 302.

[0074] ​That is, a closed loop is formed by the first rope 301 and the second rope 302, so that a force is formed to close the first clamping arm 1 and the second clamping arm 2, avoiding the first clamping arm 1 and the second clamping arm 2 from being opened, simple structure and convenient operation.

[0075] In the above embodiment, the first end of the first clamping arm 1 and the first end of the second clamping arm 2 rotate, and the first end of the first clamping arm 1 and the first end of the second clamping arm 2 are connected by the connecting piece 5 to form a shaft connection.

[0076] Meanwhile, in order to facilitate the traction of the rope, a through hole is arranged in the middle part of the connecting piece 5, a connecting shaft 501 is arranged in the through hole, and the first rope 301 and the second rope 302 are respectively located on both sides of the connecting shaft 501 during the winding process, facilitating the traction of the rope.

[0077] The second is achieved by a blocking ring, which acts on the first clamping arm and the first clamping arm to prevent the first clamping arm and the second clamping arm from being opened.

[0078] Specifically, as shown in Figures 9-14 The blocking ring includes a first clamping piece 401 and a second clamping piece 402, the first clamping piece 401 is slidably connected with the first clamping arm 1, and the second clamping piece 402 is slidably connected with the second clamping arm 2.

[0079] The first clamping piece 401 and the second clamping piece 402 are oppositely arranged, and the first clamping arm 1 and the second clamping arm 2 are located between the first clamping piece 401 and the second clamping piece 402, and the first clamping arm 1 and the second clamping arm 2 are clamped by the first clamping piece 401 and the second clamping piece 402 to prevent the first clamping arm 1 and the second clamping arm 2 from being opened, and maintain the clamping force of the first clamping arm 1 and the second clamping arm 2 on the heart tissue.

[0080] Specifically, the clamping piece and the clamping arm are slidably connected, which can be achieved by the following way: a sliding groove 6 is arranged on both sides of the first clamping arm 1 and the second clamping arm 2, and a sliding piece 7 is arranged on both sides of the first clamping piece 401 and the second clamping piece 402, and the clamping piece and the clamping arm are slidably connected through the cooperation of the sliding groove 6 and the sliding piece 7, when the first clamping arm 1 and the second clamping arm 2 are in a closed state, as shown in Figure 12 and 13 The first clamping arm 1 and the second clamping arm 2 are located between the first clamping piece 401 and the second clamping piece 402.

[0081] Specifically, the material of the clamping piece is implantable metal, such as stainless steel, nickel-titanium alloy, etc., or high polymer material, such as PLLA, PLGA, etc.

[0082] In the implementation of the above embodiment, the inner wall of the first clamping piece 401 and the second clamping piece 402 is provided with a first barb structure 403;

[0083] The outer wall of the first clamping arm 1 and the second clamping arm 2 is provided with a second barb structure 8, and the first barb structure 403 and the second barb structure 8 cooperate to prevent the first clamping arm 1 and the second clamping arm 2 from being opened.

[0084] The above-mentioned clamping piece is used to form the first clamping arm 1 and the second clamping arm 2, which is better in strength and better in clamping effect.

[0085] In the implementation of all the above-mentioned embodiments, a protective sleeve is arranged outside the first clamping arm 1 and the second clamping arm 2, which increases the stress area and prevents the heart tissue from being torn.

[0086] The heart tissue closure device provided by the embodiment of the present application has the following beneficial effects compared with the prior art:

[0087] The heart tissue closure device provided by the embodiment of the present application realizes the closure of the heart tissue through the clamping of the first clamping arm and the second clamping arm, the first clamping arm and the second clamping arm can rotate relative to one end, realize the opening and closure of the other end, the opened first clamping arm and the second clamping arm clamp the heart tissue, and the locking part is used to limit the opening of the first clamping arm and the second clamping arm, so as to maintain the clamping force of the first clamping arm and the second clamping arm on the heart tissue. Without the need of lasso, the opening structure breaks through the limitation of the lasso method, and the heart tissue does not need to be lassoed. Through the V-shaped opening structure, the closure operation on the bottom of the heart tissue can be more conveniently implemented from various angles. Moreover, the locking part can continuously provide stable clamping force, so that the heart tissue can be completely closed when the thickness of the heart tissue decreases.

[0088] In addition, the existing ligation by using a ligation line is prone to tear the heart tissue and has a high risk of bleeding due to the thin ligation line. Moreover, the heart tissue is a long and narrow cavity, and the heart tissue is seriously folded during the ligation process, which is prone to cause the risk of reconnection. The first clamping arm and the second clamping arm of the embodiment of the present application clamp the heart tissue, which can prevent the risk of reconnection caused by the folding of the heart tissue during the ligation process.

[0089] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0090] The above examples are merely used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cardiac tissue closure device, characterized in that: include: a first clamping arm comprising a first end and a second end; A second clamping arm includes a first end and a second end, wherein the first clamping arm and the second clamping arm are capable of rotating around their first ends to achieve opening and closing of the second end of the first clamping arm and the second end of the second clamping arm; a locking portion, the locking portion acting on the first clamp arm and the second clamp arm to prevent the first clamp arm and the second clamp arm from opening; The first clamp arm and the second clamp arm clamp the atrial appendage after being opened, and the locking portion limits the opening of the first clamp arm and the second clamp arm, thereby maintaining the closed state of the first clamp arm and the second clamp arm on the atrial appendage; The locking portion includes: a retaining ring member, which acts on the first clamping arm and the second clamping arm to prevent the first clamping arm and the second clamping arm from opening; The retaining ring member comprises: a first clamping member, wherein the first clamping member is slidably connected to the first clamping arm; a second clamping member, the second clamping member being slidably connected to the second clamping arm; The first clamping member and the second clamping member are arranged opposite to each other, and the first clamping arm and the second clamping arm are located between the first clamping member and the second clamping member. The first clamping member and the second clamping member are clamped to prevent the first clamping arm and the second clamping arm from opening.

2. The cardiac tissue closure device according to claim 1, wherein: The first end portion of the first clamping arm and the first end portion of the second clamping arm rotate.

3. The cardiac tissue closure device according to claim 1 or 2, wherein: The inner walls of the first clamping member and the second clamping member are provided with a first barb structure; The outer walls of the first clamp arm and the second clamp arm are provided with a second barb structure, and the first barb structure cooperates with the second barb structure to prevent the first clamp arm and the second clamp arm from opening.

4. The cardiac tissue closure device according to any one of claims 1 to 3, wherein: The outer covers of the first clamping arm and the second clamping arm are provided with protective covers.

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