Retrievable artificial valve system

Abstract

The present invention provides a recyclable artificial intervention valve system. The recyclable artificial intervention valve system includes an artificial heart valve, a valve fixing part, a primary delivery part, a secondary delivery part and a tertiary delivery part. A fixed space is formed between the valve fixing part and the secondary delivery part. The artificial heart valve includes a main body and a connecting part. The main body is annular. The connecting part is located in the fixed space and can be released when the secondary delivery part slides to the axial outside of the fixed space. The main body is sleeved outside the valve fixing part. The tertiary delivery part can slide toward the main body when the connecting part is fixed in the fixed space, and the main body is gathered in the tertiary delivery part. The recyclable artificial intervention valve system of the present invention can recycle the heart valve, thereby realizing the readjustment of the position of the heart valve, and ensuring the accurate installation position of the heart valve.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a recyclable artificial interventional valve system. Background Art

[0002] Valvular disease is a common heart valve disease, and the incidence rate gradually increases with age. For diseased valves, surgical operations are usually used to implant artificial heart valves, but some patients cannot undergo surgical operations due to their age and other reasons. For such patients, interventional valves can be used, which do not require thoracotomy, have the advantages of less trauma and faster recovery, and are receiving more and more attention and attention.

[0003] After the development of the past two decades, interventional aortic valves have made good progress and have become the standard treatment for patients who cannot undergo surgery or are at high risk of surgery. However, due to the complex anatomical structure of the mitral and tricuspid valves, there will be more complications after the interventional valves are implanted in the body, which makes the development of this type of atrioventricular valves relatively slow. Unlike the aortic valve, which is mainly caused by stenosis due to degenerative lesions, the atrioventricular valve is mainly caused by regurgitation lesions due to various reasons. There are fewer calcified plaques around the valves of regurgitation lesions, and it is more difficult to fix the interventional valve after implantation. At the same time, the atrioventricular valve usually bears forces in two directions, namely, the force of the blood in the ventricle impacting the valve in the direction of the atrium when the heart contracts, and the force of the blood in the ventricle impacting the valve in the direction of the ventricle when the heart contracts. Therefore, in order to increase the firmness of the atrioventricular valve fixation, fixing components are usually added to the atrial and ventricular surfaces of the interventional valve to achieve riveting of the valve at the implantation position.

[0004] At the same time, after the valve is released, various complications are often prone to occur due to inaccurate release positions. In order to reposition the valve that has been released inaccurately, it is usually expected that the valve can be recovered and released again after release or partial release. However, for the mitral valve and tricuspid valve of the artificial atrioventricular valve, considering the existence of natural valve leaflets, key cables and other structures inside, the fixed structure design is relatively complex, which will greatly affect the recyclability of the valve after release, especially when the valve has an anchoring structure. Recyclability can effectively re-integrate the valve that has been released and positioned inaccurately into the delivery system and release it again; recyclability can effectively reduce the difficulty of the doctor's operation and improve the postoperative effect. Summary of the invention

[0005] In view of the above problems, the present invention provides a recyclable artificial interventional valve system, which is particularly suitable for valves with anchoring structures. This artificial valve system can recycle the heart valve, thereby readjusting the position of the heart valve to ensure the accurate installation position of the heart valve.

[0006] In order to achieve the above object, the present invention provides a recyclable artificial interventional valve system, comprising an artificial heart valve part and a delivery part.

[0007] The valve part includes a valve frame, and the valve frame includes a main body, an anchoring part and a connecting part;

[0008] The delivery part includes a valve frame fixing part, a primary delivery part and a tertiary delivery part; the primary delivery part is sleeved in the valve frame fixing part and can move axially relative to the valve frame fixing part, the tertiary delivery part is sleeved outside the valve frame fixing part and can move axially relative to the valve frame fixing part, and a fixed space is formed between the valve frame fixing part and the tertiary delivery part; the artificial heart valve connection part is located in the fixed space, and can be released from the fixed space when the tertiary delivery part slides to the outside of the fixed space, the tertiary delivery part and / or the primary delivery part can slide toward the main body when the connection part is fixed in the fixed space, and the main body is gathered in the tertiary delivery part and / or the primary delivery part; the valve can be put into the space between the tertiary delivery part and the primary delivery part before being released; a tip head is provided at the end of the primary delivery part, and the tip head has a accommodating cavity, and the opening of the accommodating cavity faces the artificial heart valve.

[0009] Preferably, a secondary conveying part capable of axially moving relative to the valve frame fixing part is arranged between the tertiary conveying part and the valve frame fixing part, the tertiary conveying part is sleeved outside the secondary conveying part and can move axially relative to the secondary conveying part, and a fixed space is formed between the valve frame fixing part and the secondary conveying part; the artificial heart valve connecting part is located in the fixed space, and can be released from the fixed space when the secondary conveying part slides to the outside of the fixed space, the tertiary conveying part and / or the primary conveying part can slide toward the main body when the connecting part is fixed in the fixed space, and the main body is gathered in the tertiary conveying part and / or the primary conveying part; the valve can be retracted into the space between the tertiary conveying part and the primary conveying part before being released.

[0010] Preferably, each conveying part has a corresponding roller; and a linkage adjustment device is provided between the rollers corresponding to the primary conveying part and the tertiary conveying part.

[0011] Preferably, the rotary wheel corresponding to the primary conveying part is adjacent to the rotary wheel corresponding to the tertiary conveying part.

[0012] Preferably, the linkage adjustment device has a first working position and a second working position. In the first working position, the rotary wheels corresponding to the primary conveying part and the tertiary conveying part can rotate in a linked manner; in the second working position, the rotary wheels corresponding to the primary conveying part and the tertiary conveying part can rotate independently.

[0013] Preferably, the linkage adjustment device comprises a cam wrench and a locking ring; in the second working position, the cam wrench is located on the non-protruding surface and the locking ring is opened; in the first working position, the cam wrench is located on the protruding surface and the locking ring is locked.

[0014] Preferably, the conveying part includes a rotating wheel, an inner wheel, and a pipeline; the inner wheel has an outer layer, a connecting part and an inner layer; the outer layer is sleeved on the handle shell of the conveying system, the inner layer is located inside the handle shell of the conveying system and is connected to the corresponding pipeline, the connecting part connects the inner and outer layers and is arranged in the axial groove of the handle shell; the rotating wheel is placed outside the inner wheel and cooperates with the inner wheel through a thread.

[0015] Preferably, the wheels of the primary conveying part and the tertiary conveying part adopt the same spiral direction, and the corresponding threads are single spiral, double spiral or multi-spiral.

[0016] Preferably, the artificial heart valve also includes an atrial portion, which is connected to one end of the main body away from the connecting portion, and the atrial portion can be contracted in the accommodating cavity of the tip head; after the anchoring portion is contracted, it is located in the corresponding pipeline of the tertiary delivery part.

[0017] Preferably, when the valve is released, the linkage adjustment device is set in the open position, and the rotation of each level of the rotary wheel drives the valve to be released step by step; when the valve is recovered, the valve is first collected into the pipeline corresponding to the tertiary delivery part by rotating the rotary wheel of the tertiary delivery system, and then the linkage adjustment device is set in the locking position, and the rotary wheel is rotated in the opposite direction at the same time. At this time, the primary delivery part and the tertiary delivery part move in the same direction at the same time, and the valve is released from the pipeline of the tertiary delivery system and simultaneously enters the accommodating cavity of the Tip head corresponding to the primary delivery part, thereby achieving complete resetting.

[0018] The recyclable artificial interventional valve system utilizes the valve frame fixing part, the primary delivery part, the secondary delivery part and the tertiary delivery part to cooperate with the artificial heart valve to realize the delivery of the artificial heart valve. During the delivery of the artificial heart valve, the connecting part can be limited in a fixed space without being released. The main body of the artificial heart valve is released first to determine whether the release position of the artificial heart valve is accurate. When the release position of the artificial heart valve needs to be adjusted, the part of the connecting part limited in the fixed space can be used as a basis to control the tertiary delivery part to slide toward the main body, and the main body can be gathered in the tertiary delivery part to realize the recovery of the artificial heart valve, and then the delivery position of the artificial heart valve can be adjusted again to ensure the accurate installation position of the heart valve.

[0019] To be more specific, when the valve is released, the linkage adjustment device is set in the open position, and the rotation of each level of the rotary wheel drives the valve to be released step by step. When the valve is recovered, the valve is first collected into the pipeline corresponding to the three-level delivery part by rotating the three-level delivery system rotary wheel, and then the linkage adjustment device is set in the locking position, and the rotary wheel is rotated in the opposite direction at the same time. At this time, the first and third-level delivery parts move in the same direction at the same time, and the valve is released from the three-level delivery system pipeline and enters the lumen of the Tip corresponding to the first-level delivery part at the same time, achieving complete resetting (valve resetting). BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall appearance of the fixing part of the recyclable artificial interventional valve system according to an embodiment of the present invention;

[0021] Figure 2 It is a cross-sectional structural schematic diagram of the fixing part of the recoverable artificial interventional valve system according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the overall appearance of the three-stage delivery part of the recoverable artificial interventional valve system according to an embodiment of the present invention;

[0023] Figure 4 It is a cross-sectional structural schematic diagram of the three-stage delivery part of the recoverable artificial interventional valve system according to an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the overall appearance of the primary delivery part of the recoverable artificial interventional valve system according to an embodiment of the present invention;

[0025] Figure 6 It is a cross-sectional structural schematic diagram of a primary delivery portion of a recoverable artificial interventional valve system according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the overall appearance of the secondary delivery part of the recoverable artificial interventional valve system according to an embodiment of the present invention;

[0027] Figure 8 It is a cross-sectional structural schematic diagram of the secondary delivery part of the recoverable artificial interventional valve system according to an embodiment of the present invention;

[0028] Fig. 9 A schematic structural diagram of an artificial heart valve of a recyclable artificial intervention valve system according to an embodiment of the present invention;

[0029] Fig.10 A schematic structural diagram of an artificial heart valve of a recyclable artificial interventional valve system according to another embodiment of the present invention;

[0030] Fig.11A schematic structural diagram of an artificial heart valve of a recyclable artificial interventional valve system according to another embodiment of the present invention;

[0031] Fig.12 A schematic structural diagram of an artificial heart valve of a recyclable artificial interventional valve system according to another embodiment of the present invention;

[0032] Fig.13 Schematic diagram of the structure of an artificial heart valve of a recyclable artificial intervention valve system with different second connecting members of the present invention;

[0033] Fig.14 A three-dimensional schematic diagram of a head fixing frame of a recyclable artificial interventional valve system according to an embodiment of the present invention;

[0034] Fig.15 It is a schematic cross-sectional structural diagram of a head fixing frame of a recoverable artificial interventional valve system according to an embodiment of the present invention;

[0035] Fig.16 It is a schematic structural diagram of a recoverable artificial interventional valve system according to an embodiment of the present invention when the valve frame is completely released;

[0036] Fig.17 This is a schematic structural diagram of a valve frame of a retrievable artificial interventional valve system according to an embodiment of the present invention when the first and second connecting members are in an unreleased state;

[0037] Fig.18 It is a schematic diagram of the valve part (only the valve frame part is shown) in a compressed state;

[0038] Figure 19-20 It is a schematic diagram of the atrial part of the valve and the first and second connecting members when they are not released;

[0039] Figures 21 to 23 It is a structural schematic diagram of the process of the artificial heart valve of the recyclable artificial intervention valve system of the embodiment of the present invention being retracted into the tip head;

[0040] Fig.24 It is a schematic structural diagram of a recoverable artificial interventional valve system according to an embodiment of the present invention;

[0041] Fig.25 This is a schematic diagram of the internal structure of the delivery part of the recoverable artificial interventional valve system according to an embodiment of the present invention;

[0042] Fig.26 It is a schematic diagram of the front end cross-sectional structure of the delivery part of the recoverable artificial interventional valve system according to an embodiment of the present invention;

[0043] Fig. 27 This is a schematic diagram of the operation of a retrievable artificial interventional valve system according to an embodiment of the present invention;

[0044] Fig.28 A three-dimensional structural diagram of a delivery portion of a recyclable artificial interventional valve system according to an embodiment of the present invention;

[0045] Fig.29 It is a coordination structure diagram of the linkage adjustment device of the delivery part of the recoverable artificial intervention valve system according to an embodiment of the present invention;

[0046] Fig.30 This is a schematic diagram of the internal structure of the delivery part of the recyclable artificial interventional valve system according to an embodiment of the present invention;

[0047] Fig.31 This is a schematic diagram of the inner wheel structure of the delivery part of the recoverable artificial interventional valve system according to an embodiment of the present invention.

[0048] Description of reference numerals:

[0049] 1. Handle shell; 2. Front end Luer connector; 3. Three-stage handle rotating wheel; 4. Three-stage inner wheel; 5. Three-stage pipeline; 6. First-stage handle rotating wheel; 7. First-stage inner wheel; 8. First-stage pipeline; 9. Tip head; 10. Second-stage handle rotating wheel; 11. Second-stage inner wheel; 12. Second-stage pipeline; 13. End fixing piece; 14. Rear end Luer connector; 15. Fixing tube; 16. Head fixing frame; 17. Linkage adjustment device; 18. Main body; 19. Anchoring part; 20. First connecting piece; 21. Second connecting piece; 22. Connecting and fixing part; 23. Large head section; 24. Small head section; 25. Pressing section; 26. First fixing groove; 27. Second fixing groove; 28. Cam wrench; 29. ​​Locking ring; 30. Outer layer; 31. Connecting part; 32. Inner layer; 33. Slot. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in combination with the drawings and embodiments of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] See also Figures 1 to 31As shown, according to an embodiment of the present invention, a recyclable artificial interventional valve system includes an artificial heart valve part and a delivery part, wherein the valve part includes a valve frame, and the valve frame includes a main body 18, an anchoring portion 19 and a connector; the delivery part includes a valve frame fixing part, a primary delivery part and a tertiary delivery part, the primary delivery part is sleeved in the valve frame fixing part and can move axially relative to the valve frame fixing part, the tertiary delivery part is sleeved outside the valve frame fixing part and can move axially relative to the valve frame fixing part, and a fixed space is formed between the valve frame fixing part and the tertiary delivery part; the artificial heart valve connector is located in the fixed space and can be released from the fixed space when the tertiary delivery part slides to the outside of the fixed space, the tertiary delivery part and / or the primary delivery part can slide toward the main body 18 when the connector is fixed in the fixed space, and the main body 18 is gathered in the tertiary delivery part and / or the primary delivery part; the valve can be put into the space between the tertiary delivery part and the primary delivery part before being released; a tip head 9 is provided at the end of the primary delivery part, and the tip head 9 has a accommodating cavity, and the opening of the accommodating cavity faces the artificial heart valve.

[0052] A secondary conveying part capable of axially moving relative to the valve frame fixing part is arranged between the tertiary conveying part and the valve frame fixing part. The tertiary conveying part is sleeved outside the secondary conveying part and can move axially relative to the secondary conveying part, and a fixed space is formed between the valve frame fixing part and the secondary conveying part; the artificial heart valve connecting part is located in the fixed space, and can be released from the fixed space when the secondary conveying part slides to the outside of the fixed space, the tertiary conveying part and / or the primary conveying part can slide toward the main body 18 when the connecting part is fixed in the fixed space, and the main body 18 is gathered in the tertiary conveying part and / or the primary conveying part; the valve can be retracted into the space between the tertiary conveying part and the primary conveying part before being released.

[0053] In this embodiment, when the conveying part includes a valve frame fixing part, a primary conveying part, a secondary conveying part and a tertiary conveying part at the same time, the primary conveying part is sleeved inside the valve fixing part and can move axially relative to the valve fixing part, the secondary conveying part is sleeved outside the valve fixing part and can move axially relative to the valve fixing part, the tertiary conveying part is sleeved outside the secondary conveying part and can move axially relative to the secondary conveying part, a fixed space is formed between the valve fixing part and the secondary conveying part, the artificial heart valve includes an atrial part, a main body 18 and a connecting part, during assembly, the connecting part is located in the fixed space, and can be released when the secondary conveying part slides to the axial outside of the fixed space, the main body 18 is sleeved outside the valve fixing part, the tertiary conveying part can slide toward the main body 18 when the connecting part is fixed in the fixed space, and the main body 18 is gathered in the tertiary conveying part.

[0054] For certain embodiments, in order to simplify the setting of the delivery system, the secondary delivery part may not be set. In this case, the tertiary delivery part may be directly covered outside the valve fixing part to form a corresponding fixed space, and the valve connecting part is located in the space formed by the tertiary delivery part and the valve fixing part; the other parts of the valve are still located in the pipeline corresponding to the tertiary delivery part.

[0055] The recyclable artificial interventional valve system utilizes the valve fixing part, the primary delivery part, the secondary delivery part and the tertiary delivery part in cooperation with the artificial heart valve to realize the delivery of the artificial heart valve. During the delivery of the artificial heart valve, the connecting piece can be limited in a fixed space without being released, and the other parts of the artificial heart valve are first released in whole or in part to determine whether the release position of the artificial heart valve is accurate. When the release position of the artificial heart valve needs to be adjusted, the part of the connecting piece limited in the fixed space can be used as a basis to control the movement of the tertiary delivery part and / or the primary delivery part to re-gather the released valve part into the tertiary delivery part and / or the primary delivery part, thereby realizing the recovery of the artificial heart valve, and then the delivery position of the artificial heart valve can be adjusted again to ensure the accurate installation position of the heart valve.

[0056] Reference Figure 1-24 As shown, in one embodiment, the valve fixing part includes a fixing tube 15, a head fixing frame 16 and a handle housing 1, wherein the fixing tube 15 is sleeved in the handle housing 1, and the head fixing frame 16 is arranged at one end of the fixing tube 15 extending out of the handle housing 1. The handle housing 1 can be an integral structure or can be made of two halves; it is recommended to adopt a two-half design and then mate. The mate connection method is not limited, including various existing technologies such as bayonet, screw thread, etc.

[0057] Each conveying part has a corresponding wheel; a linkage adjustment device 17 is provided between the wheels corresponding to the primary conveying part and the tertiary conveying part, and the linkage adjustment device 17 can adjust the common movement and independent movement state between the wheels of the primary conveying part and the tertiary conveying part. The wheels corresponding to the primary conveying part are adjacent to the wheels corresponding to the tertiary conveying part, which makes it more convenient to install and set the linkage adjustment device 17.

[0058] The linkage adjustment device 17 has a first working position and a second working position. In the first working position, the wheels corresponding to the primary conveying part and the tertiary conveying part can rotate in a linked manner; in the second working position, the wheels corresponding to the primary conveying part and the tertiary conveying part can rotate independently.

[0059] When the valve is released, the linkage adjustment device 17 is set in the open position, and the rotation of each level of the rotary wheel drives the valve to be released step by step; when the valve is recovered, the valve is first collected into the pipeline corresponding to the tertiary delivery part by rotating the rotary wheel of the tertiary delivery system, and then the linkage adjustment device 17 is set in the locking position, and the rotary wheel is rotated in the opposite direction at the same time. At this time, the primary delivery part and the tertiary delivery part move in the same direction at the same time, and the valve is released from the pipeline of the tertiary delivery system and simultaneously enters the accommodating cavity of the Tip head corresponding to the primary delivery part, thereby achieving complete resetting.

[0060] Specifically, a tip head 9 is provided at the end of the primary delivery part, and the tip head 9 has a accommodating cavity, the opening of the accommodating cavity faces the artificial heart valve, and the artificial heart valve also includes an atrial part, which is connected to the end of the main body 18 away from the connecting piece, and the atrial part can be contracted in the accommodating cavity.

[0061] The primary conveying part also includes a primary pipe 8, a primary inner wheel 7 and a primary handle rotating wheel 6. The primary inner wheel 7 is arranged inside the primary handle rotating wheel 6. One end of the primary pipe 8 is fixedly installed on the primary inner wheel 7. The tip head 9 is installed at one end of the primary pipe 8 away from the primary handle rotating wheel 6.

[0062] The secondary conveying part includes a secondary handle rotating wheel 10 and a secondary inner wheel 11 arranged in the secondary handle rotating wheel 10. A secondary pipe 12 is fixedly arranged on the secondary inner wheel 11. The secondary pipe 12 passes through one end of the secondary handle rotating wheel 10. The end of the passing part is provided with an end fixing piece 13 that cooperates with the head fixing frame 16.

[0063] The tertiary conveying part includes a tertiary pipeline 5, a tertiary handle rotating wheel 3 and a tertiary inner wheel 4. The tertiary inner wheel 4 is sleeved in the tertiary handle rotating wheel 3, one end of the tertiary pipeline 5 is installed on the tertiary inner wheel 4, and the tertiary pipeline 5 is sleeved outside the secondary pipeline 12.

[0064] Each level of inner wheel can be divided into an inner layer 32, an outer layer 30 and a connecting portion 31; wherein the inner layer 32 is placed inside the handle housing 1, the outer layer 30 is sleeved on the handle housing 1, and the connecting portion 31 between the inner and outer layers is arranged in a groove on the handle housing 1. The inner wheel has an outer layer 30, a connecting portion 31 and an inner layer 32; wherein the outer layer 30 is sleeved on the handle housing 1 of the conveying system, the inner layer 32 is located inside the handle housing 1 of the conveying system and connected to the corresponding pipeline, and the connecting portion 31 connects the inner and outer layers 30 and is arranged in an axial slot 33 of the handle housing 1; the rotating wheel is placed outside the inner wheel and is matched with the inner wheel through a thread.

[0065] The outer layer 30 is usually provided with threads, which match the internal threads of the corresponding secondary handle rotating wheel 10; in order to increase the amplitude of the linear motion generated by the rotation, the threads of the rotating wheel and the inner wheel can be set as a double thread or a multi-thread structure, and a double pitch is recommended; it can be right-handed or left-handed, and can be a standard thread or a non-standard thread; it can also be not set as a thread, and directly connected in some way to achieve push-pull motion. In addition, the rotating wheels and inner wheels of each level can be set as an integral structure or a two-half split structure as needed, and it is preferred to set an integral structure, as shown in this embodiment.

[0066] The valve part includes a valve frame, leaflets and a sealing skirt (only the valve frame part is shown, and the leaflets and the sealing skirt part can refer to any existing technology), the valve frame includes an atrial part, a main body 18, an anchoring part 19 and a first connecting part 20, the atrial part is connected to the head of the main body 18, the first connecting part 20 is connected to the tail of the main body 18, the anchoring part 19 is connected to the first connecting part 20, and the anchoring part 19 extends toward the atrial part.

[0067] The atrial part is connected to the head of the main body 18, usually in the shape of a corolla, the first connecting member 20 is connected to the tail of the main body 18, the anchoring portion 19 is connected to the first connecting member 20, the anchoring portion 19 extends toward the atrial part, the first connecting member 20 has a pressing section 25, when the pressing section 25 is acted upon by the conveying system part, the anchoring portion 19 connected to the first connecting member 20 opens outward, the conveying system part has a fixed part, the fixed part is used to accommodate the pressing section 25 of the valve frame, a head fixing frame 16 is provided on one side of the fixed part close to the main body 18, the head fixing frame 16 includes a first fixing groove 26, the first fixing grooves 26 are alternately arranged along the circumference of the fixing part, and the pressing section 25 of the first connecting member 20 can be accommodated in the first fixing groove 26.

[0068] The head fixing frame 16 further includes second fixing grooves 27 . The second fixing grooves 27 and the first fixing grooves 26 are arranged alternately along the circumference of the head fixing frame 16 . The second connecting member 21 is installed in the second fixing grooves 27 .

[0069] The distal end of the head fixing frame 16 is provided with an inclined surface that matches the pressing section 25 of the valve frame. When the valve is assembled, the pressing section 25 of the first connecting member 20 is assembled to the corresponding inclined surface of the head fixing frame 16, and then the secondary conveying part moves distally to fix the pressing section on the corresponding inclined surface. Then the conveying system part is operated to assemble the ventricular part of the valve into the tube bag corresponding to the tertiary conveying part; and the atrial part is assembled to the bag corresponding to the distal tip 9 of the primary conveying part. When the valve is released, the conveying system part is operated first to withdraw the tertiary conveying part to expose the valve. At this time, because the atrial part is still constrained in the bag corresponding to the tip 9, the ventricular part is also partially constrained; therefore, the anchoring part 19 corresponding to the valve frame will open outwards due to the combined force of the conveying system part and the main body 18 on the first connecting member 20 and the pressing section 25.

[0070] When the pressing section 25 opens the anchoring portion 19, the main body 18 of the valve frame is not fully unfolded at this time, and therefore has not expanded to the maximum radius. In this case, the anchoring portion 19 is driven to open under the action of the pressing section 25, so that the unfolding radius of the anchoring portion 19 is significantly larger than the current unfolding radius of the main body 18. Therefore, the anchoring portion 19 can smoothly contact and cooperate with the natural leaflets of the human body before the main body 18, and will not be interfered by the main body 18. This can ensure that the artificial heart valve system can be stably positioned and effectively prevent loosening, thereby improving the installation stability of the artificial heart valve system and effectively solving the problem that under existing medical conditions, the artificial heart valve system will have insufficient opening of the hooks, difficulty in positioning, or loose positioning or loosening after being implanted in the human body.

[0071] The first fixing groove 26 forms an inclined surface on one side surface close to the main body 18 , and the pressing section 25 presses on the inclined surface. When the delivery system part releases the valve, the anchoring part 19 can open outward under the action of the delivery system part and the inclined surface of the first fixing groove 26 .

[0072] The connection fixing parts corresponding to the first connection member 20 and the second connection member 21 can be provided with a large head section 23 and a small head section 24, the small head section 24 is connected to the main body 18, and the large head section 23 is connected to the end of the small head section 24 away from the main body 18. When assembled, it is clamped in the groove corresponding to the fixed part of the delivery system to form a stop structure, so that when the delivery tube is sleeved outside the connection fixing part, the large head section 23 can form a stop to prevent the connection fixing part from escaping from the delivery tube, ensuring that the connection fixing part will not be released along the axial direction of the delivery tube, and can only be released along the radial direction of the delivery tube. Therefore, when the delivery tube is completely out of the range of the large head section 23, the connection fixing part will be completely released, thereby realizing the complete release of the artificial heart valve system. The connection fixing part can be a T-shaped structure, or a T-shaped shape or other shapes with one end larger than the other.

[0073] The corresponding recyclable artificial interventional valve system delivery part of this embodiment includes four parts: a fixed part, a primary delivery part, a secondary delivery part and a tertiary delivery part. It can be configured according to the description of this embodiment, or it can be adjusted and the corresponding parts can be increased or decreased as needed. In addition, the corresponding linkage adjustment device 17 of this embodiment is configured as a locking ring 29 and a cam wrench 28 arranged on the primary delivery system. Through the movement of the cam wrench 28 at different positions, the locking ring 29 is opened and contracted, and the corresponding rotating wheel of the tertiary delivery system is correspondingly inserted into the locking ring 29 for locking; and then the two rotating wheels move together during the movement, and at the same time drive the two-stage delivery parts to move together. The locking ring 29 of this embodiment is a part of the rotating wheel of the primary delivery system, and can also be set separately; it can also be set as a part of the rotating wheel of the tertiary delivery system, and the specific method is not limited. The tensioning and contraction of the cam wrench 28 are achieved by the cooperation of the bolt and the nut.

[0074] In the conveying system of this embodiment, the rotary wheel parts corresponding to the third-level conveying part and the first-level conveying part are arranged adjacently, and the advantage of this is that the linkage adjustment device 17 on the first-level conveying part can be directly linked with the third-level conveying part without adding other devices, and the implementation method is simpler. It can also be set to be non-adjacent, or in any mode, for example, the second-level conveying system and the third-level conveying system are arranged adjacently. When the third-level conveying system and the first-level conveying system are to be linked, another part needs to be set to cross the middle second-level conveying part to achieve linkage.

[0075] The pitches of the inner wheels and the rotating wheels of the primary delivery part, the secondary delivery part and the tertiary delivery part can be the same or different, but considering the linkage of the primary delivery part and the tertiary delivery part, their pitches and directions of rotation must be the same, and the secondary delivery part can be different. At the same time, in this embodiment, considering that the valve is recyclable and the corresponding pipeline part moves in the opposite direction when the delivery system and the tertiary delivery system are linked, the thread is designed to be a reverse structure. That is, one side is left-handed and the other side is right-handed.

[0076] The linkage adjustment device 17 adopts a cam structure to achieve the self-locking function when locking (fixing the rotary wheels of the primary conveying part and the tertiary conveying part together), and can also be achieved by tightening a buckle or a screw nut (hexagon socket screw or hexagon socket screw or plum screw, etc.).

[0077] In this embodiment, the primary pipeline 8 of the primary conveying part and the corresponding inner wheel are separated from the secondary conveying part and the corresponding pipeline of the tertiary. Therefore, the connection between the primary pipeline 8 and the corresponding inner wheel is carried out by punching corresponding long grooves on the corresponding secondary and tertiary pipelines 5. The existence of the long strip allows the primary system to perform corresponding linear motions; at the same time, the inner wheel is provided with corresponding screw holes and other connecting parts connected to the primary pipeline 8. Specifically, the boss set screw fixing method, gluing or pinning can be adopted. A similar method is also adopted for the connection between the rear end Luer joint 14 and the fixed pipe 15. The connection between the primary pipeline 8 of the primary conveying part and the primary inner wheel 7 is achieved by slotting a certain part in the middle of the primary pipeline 8, designing and processing an intermediate piece to be stuck in the slot, and the connection between the intermediate piece and the inner wheel is still fixed by the boss set screw connection. A slot is opened between the fixed pipe 15 and the secondary pipeline 12, and the intermediate piece does not interfere with the fixed pipe 15 and the secondary pipeline 12 when it moves axially with the primary inner wheel 7.

[0078] The installation, release and recovery process of the artificial valve of the recyclable artificial interventional valve system corresponding to this embodiment is as follows:

[0079] Step 1: After the system is assembled, put it in the appropriate position of the ventricle, make sure that the linkage adjustment device 17 is set in the loosened position, and rotate it in place. When the three-level handle rotary wheel 3 is rotated clockwise, the three-level pipe 5 continues to move backward, and the valve frame is completely separated from the three-level pipe 5. At this time, the atrial part and the connecting and fixing part 22 of the valve frame are not opened, and the anchoring part 19 is opened. The diameter of the anchoring part 19 is larger than that of other parts of the valve frame at this time. The anchoring part 19 can smoothly cooperate with the natural leaflet of the human body before the main body 18, and will not be interfered by the main body 18. If it is not appropriate to release at this time, you can rotate the rotary wheel in the opposite direction to completely put the valve into the pipe, and then release it again according to the above steps.

[0080] Step 2: Rotate the primary handle wheel 6 counterclockwise, and the tip head 9 moves forward until the tip head 9 is completely separated from the valve frame. At this time, the atrial part of the valve frame and the main body 18 are fully opened, and the main body 18 and the small barbs around the atrium can also cooperate with the natural valve leaflets of the human body.

[0081] Step 3: At this time, observe whether the valve release angle and position are appropriate according to the imaging. If appropriate, proceed to step 4; if not appropriate, re-enter the valve into the tertiary tube 5. The specific steps are as follows: (1) Rotate the tertiary handle wheel 3 to the left, the tertiary tube 5 continues to move forward, the valve gradually contracts and completely enters the tertiary tube 5, and the anchoring part 19 and the atrium part also successively enter the tertiary tube 5. When the tertiary tube 5 contacts the tip head 9, stop rotating the tertiary handle wheel 3 to the left. (2) Turn the linkage adjustment device 17 to lock the linkage adjustment device 17, so that the primary handle wheel 6 and the tertiary handle wheel 3 are locked as one, and rotate the primary handle wheel 6 (or the tertiary handle wheel 3) to the right. The tip head 9 and the tertiary tube 5 move backwards at the same time until they reach the bottom. At this time, the front end of the valve frame enters the tip head 9, and the valve can be released again. Repeat steps 1, 2, and 3 again until the valve is released to the appropriate position.

[0082] Step 4: Rotate the secondary handle wheel 10 clockwise, the end fixing piece 13 moves backward, and the end fixing piece 13 is separated from the fixed connection part of the valve frame. The first connecting piece 20 and the second connecting piece 21 of the valve frame are successively released from the fixed space and are no longer in contact with the head fixing frame 16. At this point, the valve including the atrial part, the main body 18, the anchoring part 19, the first connecting piece 20 and the second connecting piece 21 on the valve frame are all released, and the barbs on the anchoring part 19, the atrial part and the main body 18 are stuck on the natural leaflets of the human body.

[0083] Step 5: Now you need to remove the system from the ventricle. Take it out slowly and gently according to the image prompts displayed on the angiography monitor.

[0084] In addition, considering certain situations, the tube corresponding to the three-stage delivery system can be directly matched with the fixing part to fix the valve frame connector, and the secondary delivery part can be omitted. In this way, the overall design of the delivery system will be simpler. In particular, for the pressure section design without the anchoring part 19 or the valve without the anchoring part 19, this solution is more concise.

[0085] The above describes the main innovative features of the present invention in combination with the embodiments and drawings, and does not fully describe many other details or minor aspects of the present invention. After obtaining the teachings of this article, those skilled in the art can obtain these details according to the general knowledge or customary means in the art.

[0086] It is easy for those skilled in the art to understand that the specific embodiments given herein are merely exemplary ways to achieve relative movement or synchronous movement between the components of the catheter portion of the present invention. For example, in order to achieve relative movement between component A and component B, component A can be kept stationary while component B is moved, or component B can be kept stationary while component A is moved in the opposite direction. These different implementations are either equivalent replacements of the above-mentioned embodiments, or further improvements, but do not deviate the essence of the corresponding technical solutions from the scope defined by the claims of the present invention.

Claims

1. A retrievable artificial interventional valve system, characterized in that: It includes an artificial heart valve part and a delivery part. The valve part includes a valve frame, and the valve frame includes a main body (18), an anchoring part (19) and a connecting piece; The conveying part comprises a valve frame fixing part, a primary conveying part and a tertiary conveying part; the primary conveying part is sleeved in the valve frame fixing part and can move axially relative to the valve frame fixing part, the tertiary conveying part is sleeved outside the valve frame fixing part and can move axially relative to the valve frame fixing part, and a fixed space is formed between the valve frame fixing part and the tertiary conveying part; the connecting piece of the artificial heart valve part is located in the fixed space and can be released from the fixed space when the tertiary conveying part slides to the outside of the fixed space, the tertiary conveying part and the primary conveying part can slide toward the main body (18) when the connecting piece is fixed in the fixed space, and the main body (18) is gathered in the tertiary conveying part and the primary conveying part; the valve part is received in the space between the tertiary conveying part and the primary conveying part before being released; a tip head (9) is provided at the end of the primary conveying part, and the tip head (9) has a receiving cavity, and the opening of the receiving cavity faces the artificial heart valve part; The flap frame fixing part comprises a fixing tube (15), a head fixing frame (16) and a handle shell (1), wherein the fixing tube (15) is sleeved in the handle shell (1), and the head fixing frame (16) is arranged at one end of the fixing tube (15) extending out of the handle shell (1); The connecting member comprises a first connecting member (20), wherein the first connecting member (20) has a pressing section (25), and when the pressing section (25) is acted upon by the conveying part, the anchoring portion (19) connected to the first connecting member (20) opens outwards; The distal end of the head fixing frame (16) is provided with an inclined surface cooperating with the pressing section (25); when the valve part is assembled, the pressing section (25) of the first connecting member (20) is assembled correspondingly to the corresponding inclined surface of the head fixing frame (16).

2. The retrievable artificial interventional valve system according to claim 1, characterized in that: A linkage adjustment device (17) is provided between the rotating wheels corresponding to the primary conveying part and the tertiary conveying part, and the rotating wheel corresponding to the primary conveying part is adjacent to the rotating wheel corresponding to the tertiary conveying part.

3. The retrievable artificial interventional valve system according to claim 2, characterized in that: The linkage adjustment device (17) has a first working position and a second working position. In the first working position, the rotary wheels corresponding to the primary conveying part and the tertiary conveying part rotate in linkage; in the second working position, the rotary wheels corresponding to the primary conveying part and the tertiary conveying part rotate independently.

4. The retrievable artificial interventional valve system according to claim 3, characterized in that: The linkage adjustment device (17) comprises a cam wrench (28) and a locking ring (29); when in the second working position, the cam wrench (28) is located on the non-protruding surface and the locking ring (29) is opened; when in the first working position, the cam wrench (28) is located on the protruding surface and the locking ring (29) is locked.

5. The retrievable artificial interventional valve system according to claim 2, characterized in that: The wheels of the primary conveying part and the tertiary conveying part adopt the same spiral direction, and the corresponding threads are single spiral or multi-spiral.

6. The retrievable artificial interventional valve system according to claim 1, characterized in that: The artificial heart valve part also includes an atrial part, which is connected to the end of the main body (18) away from the connecting piece, and the atrial part can be contracted in the accommodating cavity of the tip head (9); after contraction, the anchoring part (19) is located in the corresponding pipeline of the third-level transport part.

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