313 results about "Artificial heart" patented technology

The invention discloses a test system and method for an artificial heart valve implant, and relates to the technical field of medical instrument detection. The system comprises a ventricle simulator, an atrium simulator, a circulation loop, a high-speed camera and a laser generator, wherein an artificial heart valve is arranged in the high-transparency compliance valve testing cavity, and the circulation loop is composed of a blood vessel compliance simulator and a blood vessel damping simulator. The circulation loop simulates a blood flowing environment for the artificial heart valve, and a flowing medium is added with tracer particle turbid liquid; the ventricle simulator, the atrium simulator, the vascular damper and the vascular compliance simulator respectively provide power, storage space, resistance and pulse pressure for the flowing medium; and the laser generator and the high-speed camera act together to obtain a particle image behind the artificial heart valve. The particle image is uploaded to a computer for heart valve pulsating flow field visualization analysis based on the digital particle image velocity measurement technology, and therefore quantitative analysis of the risk after the heart valve is implanted into the expected position is achieved.

The invention belongs to the technical field of medical instruments, and particularly relates to an artificial heart valve which comprises a support and a valve leaflet mechanism. A plurality of bracket connecting holes are formed in the bracket; the valve leaflet mechanism comprises a plurality of connecting pieces and artificial valve leaflets; the artificial valve leaflet is provided with a valve leaflet main body, two first connecting parts and two second connecting parts, each connecting piece penetrates out of the corresponding support connecting hole from the inner side of the support after being folded and is attached to the two sides of the periphery of the support connecting hole, every two adjacent fixing parts are connected with the two sides of the corresponding connecting piece respectively, and the arc-shaped parts can be attached to the surface of the valve leaflet main body. After the artificial valve leaflet and the support are fixed, in the open state of the artificial valve leaflet, the arc-shaped part attached to the outer wall of the artificial valve leaflet can play a role in buffering the artificial valve leaflet, and the artificial valve leaflet is protected.

To provide excellent assist to a patient's circulatory system.SOLUTION: A control device (100) which controls a rotary speed (nVAD(t)) of a non-beating type auxiliary artificial heart, namely VAD (50), and which uses an event based in-beat control strategy is configured so that, the rotary speed of the VAD is changed in a cardiac cycle of a heart to be assisted, and the change of the rotary speed is synchronized with the heart beat by at least one series of trigger signals (σ(t)) related to at least one in-cardiac cycle prescribed feature event, and the control device (100) is provided on a VAD(50) for heart assist for controlling preferably, for example, the VAD being a catheter based blood pump, in a non-beat rotation system.SELECTED DRAWING: Figure 3

The invention belongs to the technical field of biological medicine, and particularly discloses an artificial valve tissue calcification model and a preparation method and application thereof. The preparation method comprises the following steps: providing human valvular interstitial cells; the method comprises the following steps: providing a hydrogel system, wherein the hydrogel system comprises type I collagen, fibrinogen and Matrigel matrigel; constructing an engineered heart valve tissue strip by taking the hydrogel system as a skeleton structure between valve interstitial cells; and culturing the engineered heart valve tissue strip by using a calcification induction culture solution, so that the valve tissue generates a calcification phenotype. The model provided by the invention can generate a valve calcification phenotype which is similar to that after human heart valve calcification and is represented by valve interstitial cell activation, extracellular matrix remodeling such as collagen mass secretion and calcium deposition region generation. The model provided by the invention is low in cost, can be produced in batches, meets the research on the pathogenesis of extracorporeal valve calcification, and makes up for the dilemma that no artificial valve calcification model is available for drug research and development at present.

The invention discloses a steady-state leakage and forward flow testing device for a heart valve, and relates to the technical field of medical instrument inspection. The device comprises a reservoir, a pipeline, and a driving device, a regulating valve, a front-end flow meter, a front-end valve mounting channel and a rear-end valve mounting channel which are sequentially mounted on the pipeline, and the two ends of the pipeline are communicated with the reservoir. The heating and temperature control system ensures that the liquid temperature meets the requirement of a new edition standard, the valve installation channel with the inner diameter of 70 mm is suitable for a large-size mitral valve, and differential pressure sensor interfaces are arranged in front of and behind the valve ring of the artificial heart valve, so that the requirement of the new standard for the position of a sensor is met; according to the device, flexible selection of pressure values under different blood pressure states is achieved by adjusting the rotating speed of a driving device (a magnetic pump), accurate measurement and automation of the leakage amount are achieved through a high-precision flow meter, and the whole design aims at improving the accuracy and repeatability of testing and ensuring the quality and safety of an artificial heart valve.

Disclosed herein are a high-molecular artificial heart valve and a preparation method therefor, relating to the technical field of medical instruments. The high-molecular artificial heart valve comprises a frame, a skirt arranged on the surface of the frame, and valve leaflets bonded with the skirt. The preparation method therefor comprises the following steps: after the skirt is prepared on the frame, arranging a part of the valve leaflets on the surface of at least a part of the edge of the skirt, or connecting the edges of the valve leaflets with the at least a part of the skirt, and then bonding the valve leaflets with the edge of the skirt by means of interface microtreatment. The interface microtreatment is achieved by means of a polymer solution that bonds the valve leaflets with the edge of the skirt or by utilizing thermal bonding between the valve leaflets and the edge of the skirt. The valve prepared by the method has the advantages of uniform structure and high strength, effectively improving the production quality of the valve.

A magnetic driver generates a magnetic field that rotates about an axis and induces nutation in a disc with an array of magnets (wobble plate). The magnetic driver can be a drive disc with an array of magnets and rotated by a drive motor, or can be electromagnetic coils sequentially energized, to provide the rotating magnetic field. The wobble plate nutates about the axis of the rotating magnetic field but is constrained from rotating about the axis. The wobble plate can be enclosed in a pump housing where nutation of the wobble plate causes pumping of a fluid to occur, such as in an implanted Left Ventricular Assist Device (LVAD) or a Total Artificial Heart (TAH). Driven in reverse, an input pumping fluid may induce nutation of the wobble plate which in turn induces rotary motion of a drive disc that drives a generator or a motor / generator.

An inner cavity of a sheath tube and an inner cavity of a large head portion are communicated, an air bag is arranged on the outer side face of the front end portion of the sheath tube, a medical felt tube sleeve is sleeved on the sheath tube, a section of light tube is reserved between the medical felt tube sleeve and the air bag, a section of external threads is arranged on the rear end portion of the sheath tube close to the medical felt tube sleeve, and the external threads are communicated with the air bag. A medical felt gasket and a nut are sequentially arranged on the external thread, a plurality of narrow kerfs which are through front and back are formed in the peripheral side of the nut, a plurality of winding hooks are arranged on the rear side face of the nut, the winding hooks are circularly arranged to form a wire spool, the inner diameter of a base circle where the winding hooks are located is larger than the outer diameter of a base circle of the large head part, and a containing cavity is formed in the large head part. A blood blocking valve is arranged on a base of the containing cavity, an internal thread port is formed in the outer end of the large head portion, and the blood blocking valve blocks the internal thread port. When an artificial heart device is implanted, the heart of a patient does not need to be stopped and cardiac muscle does not need to be cut off, surgical operation is simplified, the surgical process is shortened, and the influence on the heart function of the patient is relieved.

The invention discloses an artificial heart valve control handle with a window, the control handle comprises a first handle and a second handle, each handle comprises a support member and a driving mechanism arranged on each support member; a supporting component in the first handle comprises a first supporting body and two supporting rods which are fixedly connected to the first supporting body and extend towards the near end, two connecting sleeves are fixed to the near end of the first supporting body, and the far end of each supporting rod is fixedly inserted into the corresponding connecting sleeve. A supporting component in the second handle comprises a second supporting body, the far-end portion of the second supporting body comprises two partition plates arranged at intervals in the axial direction, a guide hole is formed in each partition plate, sliding grooves extending in the axial direction are formed in the two sides, opposite to each other in the radial direction, of the second supporting body respectively, and each supporting rod penetrates through the corresponding guide hole and is arranged in the corresponding sliding groove. The second handle is integrally in sliding fit with the first handle along the two supporting rods. The section shape of the supporting rod is small, namely, the occupied space is smaller, and space arrangement in the second handle is facilitated.

The invention provides an artificial heart valve thrombus risk assessment method and device. The thrombus risk assessment method for the artificial heart valve comprises the following steps: acquiring a physiological scene after the artificial heart is implanted into the artificial valve through a resistance characteristic parameter and an elastic expansion characteristic parameter; starting a pulsating pump to output a pulsating flow medium to the artificial heart in a physiological scene; capturing the motion trail of the fluorescent particles through a high-speed camera and obtaining the original data of the blood flow velocity at the downstream of the artificial valve; acquiring a fluid mechanics simulation parameter group according to the blood flow velocity original data; and inputting a pre-trained valvular thrombus random forest classifier according to the fluid mechanics simulation parameter group, and outputting a thrombus risk probability graph in the physiological scene. According to the method, the fluid mechanics simulation parameter group is calculated based on the instantaneous velocity vector field captured by the PIV and the space-time distribution information, the two-dimensional / three-dimensional thrombus risk probability graph is generated through the random forest classifier, the high-risk point coordinates are marked, and the thrombus probability and the thrombus position are accurately predicted.

The utility model discloses a combined type artificial heart valve which comprises a fixing assembly and a valve assembly, a fixing ring is arranged on the inner side face of the fixing assembly, the valve assembly is arranged in the fixing assembly through the fixing ring, and a valve piece in the valve assembly swings to achieve opening and closing of a simulated heart valve. The valve assembly comprises a valve ring and a valve piece rotationally arranged in the valve ring, and the valve ring and the fixing ring are detachably installed. By designing the combined artificial heart valve, the valve leaflet assembly and the fixing assembly which are detachably assembled, under the condition that the valve leaflet assembly needs to be replaced due to mechanical failure of the valve leaflet or thrombus generation, opening and closing of the valve leaflet are affected, only the valve leaflet assembly needs to be replaced, the fixing assembly sutured with the human heart does not need to be disassembled, and the human heart tissue is not damaged; and the surgical risk and difficulty are greatly reduced.

The invention discloses a self-repairing acrylate dielectric material based on a dual-mode network as well as a preparation method and application of the self-repairing acrylate dielectric material based on the dual-mode network. According to the material, dynamic covalent chemistry and a synergistic effect of a dual-mode network structure are utilized, a long-chain flexible cross-linking agent and a short-chain chain extender containing dynamic thiocarbamate bonds are adopted, and the self-repairing acrylate dielectric material based on the dual-mode network is prepared. Meanwhile, the proportion of the multifunctional micromolecule TMPTMA or PET4A is optimized, and performance balance and self-repairing are achieved. In the preparation process, click reaction curing is initiated through ultraviolet light, the process is simple, and the cost is low. The tensile strength is 0.3-0.6 MPa, the elongation at break is 350%, the dielectric constant at 1kHz is 7-9, the dielectric loss is 0.047-0.067, and the mechanical property can be completely recovered within 30 minutes at the temperature of 100 DEG C. The device is suitable for bionic flapping wing aircraft muscle systems, muscle-like drivers, repairable artificial heart valves and the like, damage is repaired through dynamic key recombination, the reliability of the device is improved, and the service life of the device is prolonged.

The invention provides a mitral valve replacement system in the technical field of medical instruments, and the mitral valve replacement system comprises a valve stent, a fixing ring and a shearing part, the fixing ring is arranged around the end face of the valve stent, and the shearing part is oppositely arranged on one side of the valve stent. The fixing ring surrounds the groove in the end face of the valve support to limit the moving direction of the valve support, so that the valve support is stably located at the native mitral valve ring, and the butterfly buckle is arranged on the valve support to buckle and clamp the native mitral valve leaflet. The fixing ring is tied and hooped at the groove in the end face of the valve support of the artificial heart valve, so that the artificial heart valve is stably positioned at the original mitral valve annulus, displacement of the artificial heart valve caused by external force factors such as blood flow impact force is prevented, and then the perivalvular leakage problem caused by displacement is avoided; the native mitral valve anterior leaflet is cut open through the cutting part, and then the cut native mitral valve anterior leaflet is buckled and clamped through the butterfly buckle, so that blood flowing through the native mitral valve anterior leaflet smoothly circulates, and the problem that the left ventricular outflow tract is obstructed is solved.

The invention discloses an artificial heart valve control handle which comprises a first handle body and a second handle body which are in sliding positioning fit, and each handle body comprises a supporting component and a driving mechanism arranged on the supporting component. A supporting component in the first handle comprises a first supporting body and two supporting rods which are fixedly connected to the first supporting body and extend towards the near end, the two supporting rods are arranged side by side, and positioning teeth are arranged on the opposite sides of the two supporting rods. A supporting component in the second handle comprises a second supporting body, guide holes are formed in the second supporting body, the two supporting rods extend into the corresponding guide holes in a sliding mode, and the second handle is further provided with a sliding locking mechanism which is matched with the positioning teeth to limit the relative position of the first handle and the second handle. The supporting rod serves as a connecting component between the second handle and the first handle and is further provided with positioning teeth used for being matched with the sliding locking mechanism to control the position of the second handle relative to the first handle, operation of the control handle is met, and meanwhile the structure of the control handle is simplified.

The invention discloses an interventional artificial heart liquid path shunting structure, and relates to the technical field of medical instruments, the interventional artificial heart liquid path shunting structure comprises an impeller rotating shaft, a transmission shaft and a multi-cavity tube, the impeller rotating shaft is internally provided with a liquid path channel, the far end of the impeller rotating shaft is rotatably connected with a pigtail tube through a rotating structure, and the multi-cavity tube comprises a perfusion cavity and an outflow cavity; the near end of the impeller rotating shaft is connected with the far end of the transmission shaft, an inlet communicated with the liquid path channel is formed in the impeller rotating shaft, the inlet is communicated with the perfusion cavity, the liquid path channel and the outflow cavity, and perfusion liquid flows in from the perfusion cavity and flows out from the transmission shaft. The perfusate flows into the liquid path channel from the near end of the impeller rotating shaft through the inlet, flows to the far end of the impeller rotating shaft along the liquid path channel, flows out of the gap between the impeller rotating shaft and the rotating structure and then enters the human body, and meanwhile the perfusate flows out of the outflow cavity. Interface lubrication can be improved, friction is reduced, and cooling and heat dissipation can be achieved.

The embodiment of the invention provides a pulse control system and device of a ventricular catheter pump, and relates to the technical field of artificial hearts. When controlling the ventricular catheter pump, the pulse control equipment executes the following pulse control method: applying a pulse control signal to a driving assembly of the ventricular catheter pump, wherein the pulse control signal is a periodic pulse signal containing a pulse rotating speed; and according to the pulse control signal, the driving assembly is controlled to alternately operate according to a set operation rotating speed and a pulse rotating speed, so that the ventricular catheter pump generates periodic pulse jitter. By applying the scheme provided by the embodiment, thrombosis is effectively prevented, and the operation safety of the ventricular catheter pump is improved.

The invention relates to a high-molecular artificial heart valve and a preparation method thereof. The high-molecular artificial heart valve is composed of a specially-designed valve support and high-molecular valve leaflets. The inflow end of the valve support extends outwards in the radial direction relative to the outflow end to form a circumference, through holes are distributed in the circumference, a plurality of arc-shaped sections are formed at the outflow end and used for attachment of valve leaflets, reinforcing ribs are arranged on the outer walls of the arc-shaped sections, arc-shaped grooves are formed in the surfaces of the arc-shaped sections, and convex stand columns are arranged at the junctions of the adjacent valve leaflets at the top of the outflow end between the adjacent arc-shaped sections. The preparation method adopts a step-by-step dip-coating curing process and comprises the steps of pre-dip-coating, formal dip-coating and annealing heat treatment. By optimizing the structural design and preparation process of the valve stent, the combination firmness of the valve stent and the high-molecular valve leaflet is remarkably improved, the pore defect between the valve stent and the high-molecular valve leaflet is effectively reduced, and the internal stress of the valve leaflet under the blood flow load is reduced, so that the service life of the high-molecular valve is greatly prolonged; and the reliability and the durability in practical application are improved.

The invention provides a preparation method of a polymer artificial heart valve composite material, which comprises the following steps: immersing a fabric with a first polymer layer on the surface into a poor solvent, and paving the fabric on a substrate, so that when the first polymer layer is in contact with a second polymer solution, the first polymer layer is only slightly dissolved; forming a coating formed by embedding the first polymer layer and the second polymer layer on the surface of the fabric under the action that the poor solvent prevents the second polymer solution from entering the fabric; meanwhile, after the fabric is immersed in the poor solvent, the adsorption of the fabric to the second polymer solution is reduced, so that the fabric is kept flat in the composite material, the internal structure of the composite material is uniform, and the stability of the composite material is enhanced. By means of the mode, the polymer artificial heart valve composite material which is uniform in internal structure and smooth and flat in surface is prepared.

The invention provides an artificial heart valve device, and relates to the technical field of heart surgeries, valve leaflets are fixedly mounted on a supporting assembly, and the inner edge of a suture ring is used for being sutured and fixed with the supporting assembly and providing support for the valve leaflets; the outer edge (second connecting surface) of the suture ring is sutured with a tissue ring, so that the valve leaflet and the supporting assembly are fixed on the tissue ring; the suture ring is a non-planar flexible ring which is continuously arranged, the inner edge (a first connecting surface) and the outer edge of the suture ring have a size difference in the radial direction and have an axial fall in the axial direction, and the surface of the suture ring is a spatial curved surface and is of a skirt-shaped size change structure, so that the outer edge of the suture ring can be subjected to radial size change; the circumferential size of the outer edge is adaptively and flexibly deformed so as to be matched with tissue rings of different sizes within a certain range, and the shape and size adaptation range of the suture ring is expanded.

1. Name of the product in this design: Transcatheter replacement of mitral valve. 2. Purpose of this design: for artificial heart valve replacement in the medical field. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The present invention belongs to the technical field of artificial heart valves, and particularly relates to a method for forming a frame of an artificial heart valve, a planar forming machine and a mold. The method for forming a frame of an artificial heart valve, the planar forming machine and the mold of the present invention are provided with a plurality of convex push blocks and arc-shaped push blocks that can move independently, and according to the forming curve of the wire, the mold closing directions of the respective push blocks are designed, which can avoid and overcome the technical problem in the prior art that during the planar forming process, when the upper and lower molds provide a relatively large vertical force, the sliding property of the wire in the horizontal direction is not good, resulting in incomplete mold closing and failure to achieve the expected shaping effect; moreover, due to the unique design of the mold closing direction, the external force applied by the push block on the wire is small, scratches on the wire are not likely to occur, and the appearance of the finished product will not be affected; the planar forming machine for the frame of the artificial heart valve can realize continuous automated production of planar forming, so as to improve production efficiency.

The application discloses a heart valve device and relates to the technical field of artificial heart valves, which comprises an outer valve frame and a valve leaflet assembly connected to the inside of the outer valve frame, and the outer valve frame is a ring-shaped grid frame; the outer valve frame comprises an inflow side grid frame and an outflow side grid frame arranged in sequence from an inflow end to an outflow end, and the inflow side grid frame and the outflow side grid frame form an annular recess for clamping a native valve ring on the outer periphery of the outer valve frame; the outflow side grid frame comprises a plurality of groups of grid support units connected in sequence along the circumferential direction and enclosed into a ring, and the grid support unit comprises an outer convex grid support and an inner concave grid support, and the outer surface of the inner concave grid support is arranged in a concave manner relative to the outer surface of the outer convex grid support. In this way, the anterior leaflet of the original mitral valve can be attached to the inner concave grid support, the extrusion of the outer valve frame on the anterior leaflet is reduced, the anterior leaflet is prevented from being extruded to the left ventricular outflow tract by the outer valve frame, and the outflow area of the left ventricular outflow tract is prevented from being reduced to cause obstruction.

The invention relates to the technical field of artificial heart pumps, and discloses a centrifugal magnetic suspension artificial heart pump. The centrifugal magnetic suspension artificial heart pump comprises: a centrifugal assembly, comprising a first housing and an impeller with a gap located in the first housing, the impeller being able to rotate around the Z axis relative to the first housing; a suspension rotation assembly, comprising a second housing and a magnetic suspension rotating motor arranged in the second housing, the magnetic suspension rotating motor comprising a rotor, a stator, a suspension winding, a driving winding, a permanent magnet ring and a magnetic cover plate, the stator gap ring being arranged on the outer periphery of the rotor, the upper and lower ends of the rotor being covered with magnetic cover plates, the upper and lower end surfaces of the stator being arranged with permanent magnet rings, the gap of the magnetic cover plate being located on the inner side of the permanent magnet ring, the stator being wound with a suspension winding and a driving winding, the driving winding being energized to drive the rotor to rotate around the Z axis at a balanced position, and the impeller being coaxial with the rotor and drivingly connected. The centrifugal magnetic suspension artificial heart pump can stably suspend and rotate the rotor at a balanced position.

Disclosed in the present application are an artificial heart valve, an interventional system, and a position registration method for an artificial heart valve. The artificial heart valve comprises: a stent, which is of a cylindrical structure and has a spatially axial direction, the interior of the cylindrical structure being a blood flow channel, and the stent being radially deformable so as to switch between a delivery state in which the stent is radially compressed and a deployed state in which the stent is radially deployed; valve leaflets, which are connected to the stent to control the blood flow channel; and a first radiopaque marker, which is connected to the stent. At the reference angle of viewing of the stent, when the stent rotates around its own axis, the distance between the projection position of the first radiopaque marker and the axis of the stent changes correspondingly.

The present invention provides an artificial heart pump device and a preparation method of a magnetic diaphragm pump, belonging to the field of medical devices. The artificial heart pump device includes a magnetic diaphragm pump system and a magnetic field generating system; the magnetic diaphragm pump includes a magnetic diaphragm and a non-magnetic pump body; after the magnetic diaphragm is magnetized radially, it deforms under a uniform magnetic field; the non-magnetic pump body cooperates with the magnetic diaphragm to generate elastic deformation, and realizes the function of pumping blood by changing the volume of the magnetic diaphragm pump; a hose connects each artery or vein where the magnetic diaphragm pump is connected to the human heart to complete the transportation and circulation of blood in the human blood vessels and the magnetic diaphragm pump; a one-way valve controls the one-way flow of blood; the magnetic field generating system generates a uniform magnetic field along the axial direction of the magnetic diaphragm. The artificial heart pump device provided by the present invention has higher operation reliability and longer service life.

The utility model discloses a machining die for an artificial heart valve support, which belongs to the technical field of production and machining of medical instruments, and comprises a support main body and a die-casting main body, the die-casting main body comprises at least two hold-down units, each hold-down unit comprises a first hold-down component and a second hold-down component, and the first hold-down component and the second hold-down component are arranged in the axial direction of the support main body. The first pressing and holding assembly and the second pressing and holding assembly are detachably connected. The first pressing assembly comprises a first pressing piece and a fixed anchor pressing piece, the fixed anchor pressing piece is arranged on the outer wall of the first pressing piece, the side, close to the fixed anchor pressing piece, of the first pressing piece is provided with a first protruding structure and a positioning groove, the first protruding structure is arranged in the positioning groove, and the fixed anchor pressing piece is provided with a second protruding structure corresponding to the first protruding structure. The inner wall and the outer wall of the fixing anchor are extruded and shaped through the first protruding structure and the second protruding structure respectively, so that the main body of the artificial heart valve stent and the fixing anchor are simultaneously machined at a time through the machining die, and the machining production efficiency is improved.

The present invention provides a valve delivery device and its delivery system, comprising: a catheter part, the catheter part is provided with a first end for being delivered into the human body and a second end for providing operations, and includes an inner tube and an intermediate tube sleeved outside the inner tube; a housing part, the housing part is provided with a first housing, an outer tube and a second housing, the first end of the outer tube is fixedly communicated with the first housing, and the second end of the outer tube is fixedly communicated with the second housing; an anchoring member, the anchoring member is fixed at the first end of the intermediate tube and fixedly carries a stent for an artificial heart valve; a first control structure arranged at the second end of the catheter part and used for controlling the relative sliding of the intermediate tube and the outer tube; the housing part is sleeved on the catheter part. The present invention is used to deliver an artificial heart valve to the position of the native valve and replace the diseased valve, and can perform circumferential control, thereby improving the delivery effect.

The present application relates to a kind of trans-catheter heart valve replacement system, which is composed of artificial heart valve and valve anchoring device, wherein the valve anchoring device can be wrapped outside valve chordae tendineae, while capturing native valve leaflet, providing positioning point for subsequent implantation of artificial heart valve;Artificial heart valve can be implanted in heart, and replace the physiological function of native valve.The valve anchoring device and artificial heart valve can be matched and positioned, in order to prevent the two from being too tight and continuous extrusion, friction and causing chordae tendineae rupture, there are two kinds of cooperation between them: the first cooperation state, can let artificial heart valve and valve anchoring device abut each other, ensure the stability of structure and position when the two are matched with each other;Second cooperation state, there is gap between artificial heart valve and valve anchoring device at this time, so that native valve leaflet or chordae tendineae can pass through, to reduce the contact area between valve replacement system and chordae tendineae as much as possible, avoid extruding chordae tendineae.

The present invention relates to an artificial heart valve, which comprises a valve stent, a first sealing membrane, a second sealing membrane, valve leaflets and valve leaflet anchoring members. The valve stent includes an inflow section and an outflow section; the first sealing membrane is attached to the outer side of the valve stent and comprises a hydrophilic swelling material, which can absorb liquid and swell after contacting with blood, for reducing paravalvular leakage; the second sealing membrane is arranged on the outer side of the first sealing membrane and at least covers all regions corresponding to the outer surface of the inflow section, for increasing the friction with the native valve leaflets; the valve leaflets are arranged inside the valve stent for controlling the unidirectional flow of blood; the valve leaflet anchoring members are spiral and can be coiled outside the mitral / tricuspid chordae tendineae plexus and interact with the valve stent. By providing the first sealing membrane and the second sealing membrane, the artificial heart valve of the present invention can better fit with the native tissue after being implanted into the mitral / tricuspid valve, so as to effectively prevent the occurrence of paravalvular leakage.