Coronary sinus constriction system

Abstract

The utility model provides a coronary sinus constriction system. The coronary sinus constriction system comprises a coronary sinus constriction device, the coronary sinus constriction device is of a layer net structure, the layer net structure extends in the axial direction to form a lumen channel, the lumen channel comprises a first expansion section, a reducing section and a second expansion section which are sequentially connected, and the inner diameter of the first expansion section is larger than that of the second expansion section; a plurality of lug-shaped structures are arranged at the end of the first expansion section in the circumferential direction at intervals. The conveying device comprises a conveying steel cable; the first end of the spiral connecting piece is connected with the conveying steel cable, and the second end of the spiral connecting piece rotates and is sequentially limited and blocked with the multiple ear-shaped structures, so that the coronary sinus constriction device is detachably connected with the conveying steel cable. The coronary sinus constriction system solves the problem that a coronary sinus constriction system in the prior art is inconvenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical instruments, and particularly to a coronary sinus narrowing system. BACKGROUND

[0002] Angina pectoris is a clinical syndrome caused by coronary artery insufficiency, acute myocardial ischemia and hypoxia, with paroxysmal chest pain or chest discomfort as the main performance. Angina pectoris is the pain felt on the body surface by the reflection of heart ischemia, characterized by paroxysmal and crushing pain in the anterior chest, which can be accompanied by other symptoms, and the pain is mainly located in the posterior sternum and can be radiated to the precordial region and left upper limb. The direct cause of angina pectoris is myocardial ischemia, which is usually a symptom of coronary artery disease.

[0003] Among all patients with angina pectoris, it is estimated that about 10% have severe, persistent and uncontrollable symptoms through traditional medical therapy. This severe debilitating condition is called refractory angina pectoris. The coronary sinus narrowing device is considered to be a promising solution for treating refractory angina pectoris. Its working principle is: through minimally invasive surgery to establish an interventional access, the coronary sinus narrowing device is delivered to the implantation site of the coronary sinus through the access through the right atrium, the inner diameter of the coronary sinus is narrowed, the trans-sinus pressure gradient is established, the back pressure is increased, the subendocardial and epicardial blood perfusion ratio is improved, and the oxygen-rich blood flow to the previously abnormal blood flow area of the heart is increased, so as to achieve the purpose of relieving myocardial ischemia.

[0004] The current coronary sinus narrowing device is generally made of a medical stainless steel cutting framework expanded by a balloon. The device is sent to the target position by a delivery device, and is expanded by a balloon to tightly adhere to the blood vessel wall, narrow the inner diameter of the coronary sinus, increase the back pressure, and improve the blood perfusion ratio. The delivery device using balloon expansion needs to be pre-installed with the instrument, the operation of the procedure is complicated, and the operation steps and time of the medical staff are increased, which brings great inconvenience and increases the preparation time of the operation. The instrument cannot be recycled, and it is difficult to realize adjustment and release during the operation, and the in-operation risk and emergency disposal difficulty are large.

[0005] As known from the above, there is a problem of inconvenient use of the coronary sinus narrowing system in the prior art. UTILITY MODEL CONTENT

[0006] The main purpose of the utility model is to provide a coronary sinus narrowing system to solve the problem of inconvenient use of the coronary sinus narrowing system in the prior art.

[0007] In order to achieve the above object, the utility model provides a coronary sinus narrowing system, include: coronary sinus narrowing device, the layer net structure of coronary sinus narrowing device is formed along the axial extension and forms the lumen channel, the lumen channel includes the first expansion section, the reduced diameter section and the second expansion section that connect in proper order, the inside diameter of first expansion section is greater than the inside diameter of second expansion section, and the end of first expansion section is provided with a plurality of ear type structures along the circumferential interval;Conveying device, conveying device includes conveying steel cable;Spiral connecting piece, the first end of spiral connecting piece is connected with conveying steel cable, and the second end of spiral connecting piece is rotated and is sequentially limited with a plurality of ear type structures and stops, so that the coronary sinus narrowing device is detachably connected with conveying steel cable.

[0008] Further, the coronary sinus narrowing system further includes a self-locking piece, the self-locking piece includes a first connector and a second connector which are detachably connected, the first connector is connected with the spiral connecting piece, and the second connector is connected with the conveying steel cable.

[0009] Further, one of the first connector and the second connector has a buckle protrusion, and the other has a buckle accommodating groove, the buckle protrusion extends into the buckle accommodating groove, so that the first connector and the second connector are clamped.

[0010] Further, one of the first connector and the second connector has an external thread head, and the other has a matching internal thread hole, the external thread head extends into the internal thread hole, so that the first connector and the second connector are threadedly connected, and the spiral direction of the spiral connecting piece is opposite to the spiral direction of the internal and external threads of the self-locking piece.

[0011] Further, the first connector is integrally formed with the spiral connecting piece, and / or the second connector is integrally formed with the conveying steel cable.

[0012] Further, the ear type structure includes a first extension section, a bending section and a second extension section which are connected in proper order, the first extension section and the second extension section are connected with the first expansion section respectively, and the second end of the spiral connecting piece is rotated and limited and stopped with the ear type structure through the ear type structure.

[0013] Further, the end of the ear type structure has a ball head, the outer side wall of the spiral connecting piece is provided with a clamping groove along the spiral direction, and the ball head is accommodated in the clamping groove, so that the spiral connecting piece is limited and stopped with the ear type structure.

[0014] Further, the layer net structure is made of elastic wire material, and the ear type structure is integrally formed with the layer net structure.

[0015] Further, the grid density of the layer net structure is k times the number of the ear type structure, and k is a positive integer.

[0016] Further, the ear type structure is a single wire structure or a multi-wire winding structure made of elastic wire material or high-strength wire material, and the ear type structure is windingly connected with the first expansion section.

[0017] The technical scheme of the utility model discloses, coronary sinus narrowing system includes coronary sinus narrowing device, conveying device and spiral connecting piece, and the coronary sinus narrowing device is layer net structure, and the layer net structure extends along the axial direction and forms the lumen passage, and the lumen passage includes the first expansion section, the reducing diameter section and the second expansion section that connect in proper order, the inner diameter of the first expansion section is greater than the inner diameter of the second expansion section, and the end of the first expansion section is spaced apart and is provided with a plurality of ear-shaped structures along the circumference, and the conveying device includes conveying steel cable, and the first end of the spiral connecting piece is connected with the conveying steel cable, and the second end of the spiral connecting piece rotates and is in turn limited and stopped with a plurality of ear-shaped structures, so that the coronary sinus narrowing device and conveying steel cable are detachably connected, so that the throttle regulation is realized through the setting reducing diameter section, the back pressure is raised, the compliance is strong, convenient to use, and balloon expansion is not needed, the operation is simplified, further, through setting ear-shaped structure on the first expansion section, conveying steel cable is detachably connected with ear-shaped structure through spiral connecting piece, so that the coronary sinus narrowing device can be adjusted and withdrawn before release and the coronary sinus narrowing device can be recycled after release, and the stability of intraoperative operation is improved through the spiral connection release mode, the intraoperative risk and emergency disposal difficulty are reduced, the use convenience of coronary sinus narrowing system is greatly improved, and the problem of inconvenient use of the coronary sinus narrowing system in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description, make apparent to those skilled in the art the present application and the several attendant advantages thereof. In the drawings:

[0019] Figure 1 The structure of the coronary sinus narrowing device in one specific embodiment of the utility model is shown.

[0020] Figure 2 The structure of the coronary sinus narrowing device in one specific embodiment of the utility model is shown.

[0021] Figure 3 The structure of the self-locking piece in one specific embodiment of the utility model is shown.

[0022] Figure 4 The structure of the coronary sinus narrowing system in one specific embodiment of the utility model is shown.

[0023] Figure 5 The structure of the self-locking piece in another specific embodiment of the utility model is shown.

[0024] Figure 6 The structure of the coronary sinus narrowing device in another specific embodiment of the utility model is shown.

[0025] Figure 7 The utility model discloses a schematic drawing of ear type structure and first expansion section connection in another specific embodiment.

[0026] Among them, the above-mentioned drawing includes the following sign:

[0027] 10, coronary sinus narrowing device;11, first expansion section;12, reduced diameter section;13, second expansion section;20, ear type structure;21, ball head;30, delivery device;31, delivery steel cable;32, delivery sheath;40, helical connector;41, clamping groove;50, self-locking piece;51, first joint;52, second joint;53, buckle protrusion;54, buckle accommodating groove;55, external thread head;56, internal thread hole. DETAILED DESCRIPTION

[0028] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0030] In the utility model, unless otherwise stated, the orientation words such as "up, down, top, bottom" used are generally for the direction shown in the drawings, or for the component itself in the vertical, perpendicular or gravity direction;Similarly, for the convenience of understanding and description, "inner, outer" refers to the inner and outer of the contour of each component itself, but the above orientation words are not used to limit the utility model.

[0031] Obviously, the above-described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the utility model.

[0032] In order to solve the problem that the coronary sinus narrowing system is inconvenient to use in the prior art, the utility model provides a coronary sinus narrowing system.

[0033] As Figures 1-2 , Figure 4As shown, the coronary sinus constriction system comprises a coronary sinus constriction device 10, a delivery device 30 and a screw connector 40. The coronary sinus constriction device 10 is a layer net structure extending along the axial direction to form a lumen passage, which comprises a first expansion section 11, a reduced diameter section 12 and a second expansion section 13 connected in sequence. The inner diameter of the first expansion section 11 is larger than that of the second expansion section 13. The end of the first expansion section 11 is provided with a plurality of ear-shaped structures 20 at intervals in the circumferential direction. The delivery device 30 comprises a delivery steel cable 31, the first end of the screw connector 40 is connected with the delivery steel cable 31, and the second end of the screw connector 40 is rotationally and sequentially limited and stopped by the plurality of ear-shaped structures 20, so that the coronary sinus constriction device 10 is detachably connected with the delivery steel cable 31.

[0034] By providing the ear-shaped structures 20 on the first expansion section 11, the delivery steel cable 31 is detachably connected with the ear-shaped structures 20 through the screw connector 40, so that the coronary sinus constriction device 10 can be adjusted for withdrawal before release and recovered after release, and the screw release mode improves the stability of intraoperative operation, reduces the risk and difficulty of emergency disposal during operation, and greatly improves the convenience of use of the coronary sinus constriction system.

[0035] In the embodiment, the screw connector 40 is spirally wound along the axial direction of the delivery steel cable 31 to form a spring-like shape.

[0036] In the embodiment, the ear-shaped structure 20 comprises a first extension section, a bending section and a second extension section connected in sequence, the first extension section and the second extension section are respectively connected with the first expansion section 11, and the second end of the screw connector 40 is rotationally and limitingly stopped by the ear-shaped structure 20.

[0037] In the embodiment, the inner diameters of the first expansion section 11 and the second expansion section 13 are both larger than that of the reduced diameter section 12. That is, the overall structure of the coronary sinus constriction device 10 is a double-horn shape with one large and one small. The edges of the first expansion section 11 and the second expansion section 13 of the coronary sinus constriction device 10 are rounded without sharp edges, which reduces the risk of damage to human tissues during surgery. Blood sequentially passes through the first expansion section 11, the reduced diameter section 12 and the second expansion section 13 of the lumen flow regulator, and due to the smallest inner diameter of the reduced diameter section 12, a throttling effect is generated at the reduced diameter section 12. By setting the reduced diameter section 12 to achieve throttling adjustment, the back pressure is increased, the subendocardial and subendocardial blood perfusion ratio is improved, the oxygen-rich blood flow to the abnormal heart region is increased, and the purpose of relieving myocardial ischemia is achieved.

[0038] In the embodiment, at least a part of the first expansion section 11 is a flat section with equal inner diameter, and further, the flat section is located at the end of the first expansion section 11 and connected with the ear-shaped structure 20. Correspondingly, the second expansion section 13 can also adopt the above setting, which will not be described here. Through the above setting, the flat section can be attached to the inner wall of the blood vessel, so that the coronary sinus constriction device 10 is better attached to the inner wall of the blood vessel, preventing displacement.

[0039] As shown in Figures 3-4 The coronary sinus constriction system also includes a self-locking piece 50. The self-locking piece 50 includes a first joint 51 and a second joint 52 which are detachably connected. Considering the convenience of installation by the user during use, the coronary sinus constriction system in the embodiment adopts a pre-installed manner to reduce the inconvenience caused by complicated preoperative operation of the user. The first joint 51 is connected with the spiral connecting piece 40, and the second joint 52 is connected with the conveying steel cable 31, and the first joint 51 and the second joint 52 are connected together during use. Specifically, the spiral connecting piece 40 is sequentially threaded through the plurality of ear-shaped structures 20 of the coronary sinus constriction device 10, and when all the ear-shaped structures 20 are threaded, the ends of the first expansion section 11 are gathered into a cage shape.

[0040] In the embodiment, the first joint 51 is integrally formed with the spiral connecting piece 40, and correspondingly, the second joint 52 is integrally formed with the conveying steel cable 31. Through the above setting, the connection strength of the self-locking piece 50 and other components can be ensured, and the service life is improved. Of course, the first joint 51 and the spiral connecting piece 40, and the second joint 52 and the conveying steel cable 31 can also be connected and fixed by welding, bonding and the like.

[0041] As shown in Figure 3 In the embodiment, the first joint 51 has a buckle protrusion 53, and the second joint 52 has a buckle accommodating groove 54, and the buckle protrusion 53 extends into the buckle accommodating groove 54 to enable the first joint 51 and the second joint 52 to be clamped. Specifically, the buckle protrusion 53 can be a plurality of buckle protrusions 53 which are arranged at intervals along the circumference of the first joint 51. Correspondingly, the buckle accommodating groove 54 is also a plurality of buckle accommodating grooves 54 which are arranged at intervals along the circumference of the second joint 52 and correspond to the plurality of buckle protrusions 53 one by one. During use by the user, the buckle protrusion 53 only needs to be aligned with the buckle accommodating groove 54 and pushed along the axial direction with force, and the installation can be completed, which is convenient to operate without the need for other tools, and the buckle protrusion 53 is provided with a barb structure to ensure that it is not easy to fall off after installation. Of course, the second joint 52 can also have the buckle protrusion 53, and the first joint 51 can have the buckle accommodating groove 54, which can be selected according to actual needs.

[0042] As shown in Figure 5As shown in the figure, in an alternative embodiment, the second joint 52 has an external threaded head 55, and the first joint 51 has a matching internal threaded hole 56, the external threaded head 55 extends into the internal threaded hole 56 to threadedly connect the first joint 51 and the second joint 52, and the spiral direction of the spiral connecting piece 40 is opposite to the spiral direction of the internal and external threads of the self-locking piece 50, that is, one end is counterclockwise spiral, and the other end is clockwise spiral. If the spiral connecting piece 40 is clockwise, the spiral direction of the internal and external threads of the self-locking piece 50 is counterclockwise, and when the delivery cable 31 is rotated to release the instrument, the self-locking piece 50 will be connected more tightly because the threads of the self-locking piece 50 are opposite to the spiral direction of the spiral connecting piece 40. Of course, the first joint 51 can have an external threaded head 55, and the second joint 52 can have a matching internal threaded hole 56, which can be selected according to actual needs.

[0043] As shown in the figure, Figure 6 In an alternative embodiment, the end of the ear-shaped structure 20 has a ball head 21, and the outer side wall of the spiral connecting piece 40 is provided with a clamping groove 41 along the spiral direction, and the ball head 21 is accommodated in the clamping groove 41 to limit and stop the spiral connecting piece 40 and the ear-shaped structure 20. Specifically, the ball head 21 can be welded or fused and shaped, and each ear-shaped structure 20 is provided with a ball head 21. The clamping groove 41 is a space for accommodating the ball head 21, and when the spiral connecting piece 40 is rotated, each ball head 21 enters the clamping groove 41 in turn and slides along the clamping groove 41. Through the above arrangement, the uniformity of the instrument installation state can be improved, that is, the ear-shaped structures 20 do not affect each other in the spiral structure.

[0044] In this embodiment, the width of the clamping groove 41 gradually decreases from the inside to the outside. Specifically, the clamping groove 41 can be dovetail-shaped to ensure the stability of the ball head 21 after being installed.

[0045] In this embodiment, the layer net structure is made of elastic wire material, and the ear-shaped structure 20 is integrally formed with the layer net structure. The elastic wire material has shape memory characteristics, so that the coronal sinus stenosis device 10 can automatically recover to the original shape during the release process, which is convenient and fast. Specifically, the elastic wire material can be nickel-titanium alloy or other memory metal materials. Further, the layer net structure can also be made of nickel-titanium pipe material by laser cutting.

[0046] More specifically, the layer net structure in this embodiment is woven from a whole elastic wire material. Further, in order to improve the overall strength of the structure, the ear-shaped structure 20 and the layer net structure are integrally woven from a whole elastic wire material. In this way, the coronal sinus stenosis device 10 is entirely woven from elastic wire material, without breakpoints and interfaces, and has high structural strength and stability.

[0047] In this embodiment, the grid density of the layered structure is k times the number of ear-shaped structures 20, where k is a positive integer. If the grid density of the layered structure is m, then the product of the number r (r≥2) of ear-shaped structures 20 and the positive integer k (k=1,2,3…n) equals m. This quantitative relationship ensures that the ear-shaped structures 20 are uniformly distributed in the coronary sinus constriction device 10, improving the consistency of the device.

[0048] like Figure 7 As shown, in one optional embodiment, the ear-shaped structure 20 and the layered mesh structure are separate structures. Specifically, the ear-shaped structure 20 is a multi-filament winding structure made of elastic filament, and the ear-shaped structure 20 is wound and connected to the first expansion section 11. Further, the ear-shaped structure 20 can also be made of high-strength filament such as polyester thread. Using the above structure can improve the structural strength of the ear-shaped structure 20, thereby improving the connection stability between the ear-shaped structure 20 and the first expansion section 11. Of course, the ear-shaped structure 20 can also be a single-filament structure made of elastic filament, which can be selected according to actual needs. Furthermore, the ear-shaped structure 20 can also be connected and fixed to the first expansion section 11 by welding or bonding.

[0049] In this optional embodiment, after the layered mesh structure is formed, the ear-shaped structure 20 is connected to the layered mesh structure at its large end node by winding. This ensures the overall consistency of the device. Furthermore, since the layered mesh structure and the ear-shaped structure 20 are not integrally formed, the number of ear-shaped structures 20 is not affected by the mesh density of the layered mesh structure, allowing for flexible winding and forming. This split-type molding structure not only reduces the processing difficulty of the device but also provides more diverse variations in the shape of the ear-shaped structure 20, thus better adapting to the shape of blood vessels.

[0050] In this embodiment, the coronary sinus constriction device 10 also includes a choke membrane disposed on the inner surface of the device. Specifically, the shape of the choke membrane is adapted to the shape of the lumen channel, i.e., a double-trumpet shape, and the forming process of the choke membrane can be either a covering membrane or a suture membrane. Through the above configuration, relying on the flow-blocking properties of the choke membrane, the immediate throttling effect of the coronary sinus constriction device 10 during surgery can be enhanced. Furthermore, the choke membrane can also be disposed on the outer surface of the coronary sinus constriction device 10, thereby reducing stimulation to the target lumen, which can be selected according to actual needs.

[0051] like Figure 4 As shown, the delivery device 30 also includes a delivery sheath 32. Before release, the coronary sinus constriction device 10 extends along the axial direction of the delivery cable 31 and is compressed and completely housed within the delivery sheath 32.

[0052] In the process of surgical preparation, the screw connector 40 is sequentially threaded through the plurality of ear-shaped structures 20 so that the entire first expansion section 11 is received in the delivery sheath 32 along the screw connector 40, similar to the way a curtain is received, all the ear-shaped structures 20 are concentrated on the screw connector 40, and the end of the first expansion section 11 is gathered into a cage shape, so that the first expansion section 11 is reduced in size to a size that is easily received in the delivery sheath 32, facilitating loading.

[0053] In this embodiment, after being separated from the delivery sheath 32, the delivery cable 31 is still connected to the first expansion section 11 of the coronary sinus stenosis device 10 through the self-locking member 50 and the screw connector 40. Through the above arrangement, the coronary sinus stenosis device 10 can be adjusted for withdrawal before it is separated from the delivery sheath 32 but not from the screw connector 40 when the release instrument is released, avoiding the occurrence of poor release position or other adverse conditions of the coronary sinus stenosis device 10 due to improper operation, thereby achieving the intended function of the coronary sinus stenosis device 10 and achieving complete recovery of the instrument. Further, the delivery cable 31 is rotated in reverse, so that the screw connector 40 is separated from the plurality of ear-shaped structures 20, and the separation from the coronary sinus stenosis device 10 is completed.

[0054] The use process of the coronary sinus stenosis system in this embodiment is as follows:

[0055] First, the first connector 51 and the second connector 52 respectively preloaded with the screw connector 40 and the delivery cable 31 are connected, and then the delivery cable 31 is rotated in the forward direction, so that the plurality of ear-shaped structures 20 of the coronary sinus stenosis device 10 are all threaded on the screw connector 40, and the delivery cable 31 is withdrawn backward to receive the coronary sinus stenosis device 10 in the delivery sheath 32. The coronary sinus stenosis device is moved to the target position, and when it is switched from the received state to the released state, the delivery sheath 32 is withdrawn so that one end of the coronary sinus stenosis device 10 protrudes out of the delivery sheath 32 and restores to the second expansion section 13 under the action of the shape memory property. With the gradual withdrawal of the delivery sheath 32, the coronary sinus stenosis device 10 gradually restores to the original state. When the coronary sinus stenosis device 10 is completely withdrawn from the delivery sheath 32, the second expansion section 13, the reduced diameter section 12, and the first expansion section 11 of the coronary sinus stenosis device 10 are sequentially completely released. At this time, the delivery cable 31 is rotated in the reverse direction so that each ear-shaped structure 20 is sequentially separated from the screw connector 40, the first expansion section 11 is separated from the delivery cable 31 and is supported and fixed at the target position, and then the delivery device is withdrawn from the human body, and the entire release process is completed.

[0056] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects: through setting up the coronary sinus narrowing system including the coronary sinus narrowing device 10, the conveying device 30 and the screw connecting piece 40, the coronary sinus narrowing device 10 is the layer net structure, the layer net structure extends along the axial direction and forms the lumen passage, the lumen passage includes the first expansion section 11, the reduced diameter section 12 and the second expansion section 13 connected in turn, the inner diameter of the first expansion section 11 is greater than the inner diameter of the second expansion section 13, the end of the first expansion section 11 is arranged with multiple ear-shaped structures 20 along the circumference, the conveying device 30 includes the conveying steel cable 31, the first end of the screw connecting piece 40 is connected with the conveying steel cable 31, the second end of the screw connecting piece 40 rotates and is limited and stopped with multiple ear-shaped structures 20 in turn, so that the coronary sinus narrowing device 10 is detachably connected with the conveying steel cable 31, in this way, the ear-shaped structure 20 is arranged on the first expansion section 11, the conveying steel cable 31 is detachably connected with the ear-shaped structure 20 through the screw connecting piece 40, so that the coronary sinus narrowing device 10 can be adjusted and withdrawn before release and the coronary sinus narrowing device 10 can be recovered after release, and the screw connecting release mode improves the stability of intraoperative operation, reduces the intraoperative risk and emergency disposal difficulty, and greatly improves the use convenience of the coronary sinus narrowing system.

[0057] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0058] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0059] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A coronary sinus constriction system, comprising: The application relates to a coronary sinus constriction device (10) which is a layer net structure extending along an axial direction to form a lumen channel, the lumen channel comprising a first expansion section (11), a reduced diameter section (12) and a second expansion section (13) connected in sequence, the inner diameter of the first expansion section (11) being larger than that of the second expansion section (13), and a plurality of ear-shaped structures (20) being arranged at the end of the first expansion section (11) in a circumferential direction. A delivery device (30) comprising a delivery steel cable (31); A screw connector (40) having a first end connected with the delivery steel cable (31) and a second end rotating and sequentially limiting and stopping the plurality of ear-shaped structures (20) to detachably connect the coronary sinus constriction device (10) with the delivery steel cable (31). The coronary sinus constriction system further comprises a self-locking member (50) comprising a first joint (51) and a second joint (52) detachably connected, the first joint (51) being connected with the screw connector (40) and the second joint (52) being connected with the delivery steel cable (31).

2. The coronary sinus constriction system of claim 1, wherein, One of the first joint (51) and the second joint (52) has a buckle protrusion (53) and the other has a buckle accommodating groove (54), the buckle protrusion (53) extending into the buckle accommodating groove (54) to buckle the first joint (51) and the second joint (52).

3. The coronary sinus constriction system of claim 2, wherein, One of the first joint (51) and the second joint (52) has an external thread head (55) and the other has a matching internal thread hole (56), the external thread head (55) extending into the internal thread hole (56) to threadedly connect the first joint (51) and the second joint (52), and the screw direction of the screw connector (40) is opposite to that of the internal and external threads of the self-locking member (50).

4. The coronary sinus constriction system of claim 2, wherein, 5. The coronary sinus constriction system according to claim 2, wherein The first joint (51) is integrally formed with the screw connector (40); and / or The second joint (52) is integrally formed with the delivery steel cable (31). The ear-shaped structure (20) comprises a first extension section, a bending section and a second extension section connected in sequence, the first extension section and the second extension section being respectively connected with the first expansion section (11), and the second end of the screw connector (40) rotating through the ear-shaped structure (20) to limit and stop the ear-shaped structure (20).

6. The coronary sinus constriction system of claim 1, wherein, The end of the ear-shaped structure (20) has a ball head (21), the outer side wall of the screw connector (40) is provided with a clamping groove (41) along the screw direction, and the ball head (21) is clamped in the clamping groove (41) and slides along the clamping groove (41) to limit and stop the screw connector (40) and the ear-shaped structure (20).

7. The coronary sinus constriction system of claim 1, wherein, The layer net structure is knitted by elastic filaments, and the ear-shaped structure (20) is integrally formed with the layer net structure.

8. The coronary sinus constriction system according to any one of claims 1 to 7, characterized in that ​ 9. The coronary sinus constriction system of claim 8, wherein, The mesh density of the layer mesh structure is k times the number of the ear-shaped structures (20), and k is a positive integer.

10. The coronary sinus constriction system according to any one of claims 1 to 7, characterized in that The ear-shaped structure (20) is a single wire structure or a multi-wire winding structure made of elastic wire or high-strength wire, and the ear-shaped structure (20) is windingly connected with the first expansion section (11).

Images