154 results about "Valve replacement" patented technology

The invention relates to an anchor hook and methods of using the same for subannular anchoring of a transcatheter heart valve replacement, and in particular for an orthogonally delivered (side-delivered) transcatheter prosthetic heart valve having a annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the mitral or tricuspid valve from the inferior vena cava or superior vena cava, or trans-septally to the mitral valve, the valve having a height of about 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring a delivery catheter to bend 90 degrees during deployment.

Disclosed are valve replacement devices, systems, and methods. Valve replacement devices may comprise one- or two-piece systems comprising a receiver body (also called an adapter) and a valve assembly with replacement leaflets attached to and located within the receiver body. In two-piece systems, the valve assembly may be removable from the receiver body such that both can be delivered together or separately, and the receiver body may remain implanted while the valve assembly may be removed and replaced. Also described are devices, systems, and methods related to delivering, removing, and replacing a valve replacement. Such delivery methods may include transseptal insertion of a new minimum leaflet structure, and securement of the valve replacement using several securement type (e.g., supra-annular, sub-annular, radial, leaflet securement, etc.). Also described is a braided helical design that mimics the heart's natural movement, and a flange structure for assisting the functioning of the valve replacement.

Methods for determining likelihood of thrombosis based on patient-specific anatomic, valve, and flow parameters are disclosed herein. Such methods are used to select a transcatheter aortic valve that decreases likelihood of thrombosis after TAVR procedures. The methods correlate a number of fluid flow and geometric parameters such as stasis volume, neo-sinus volume, kinematic viscosity, dynamic viscosity, heart rate, the circulation, ejection time, velocity of the main jet, wall shear stress, total kinetic energy in the neo sinus volume, width of the neo-sinus, height or depth of the neo-sinus, the angle between the velocity direction and the stent of the transcatheter valve, the distance from the tip of the leaflet perpendicular to the leaflet edge and intersecting the sinotubular junction, and the cross-sectional area of the neo-sinus taken from a longitudinal or axial perspective. Such parameters are used to derive empirical or semi-empirical mathematical models to determine the likelihood of thrombosis.

The invention relates to an artificial heart valve and a transcatheter heart valve replacement system.The artificial heart valve comprises a valve support and an outer skirt part, the valve support is provided with an inflow end and an outflow end, and the valve support is sequentially provided with a plurality of grid sets arranged in the circumferential direction from the outflow end to the inflow end; wherein the grid group closest to the inflow end is suitable for being matched with the position below the annulus plane, and the size of a net opening of at least one non-end grid group matched with the annulus plane is larger than that of a net opening of at least one axially adjacent grid group; the outer skirt part covers the outer surface of the valve stent, the outer skirt part at least covers the two adjacent grid groups close to the inflow end, and the position, close to the inflow end, of the outer skirt part is configured to be of a structure with the thickness gradually increased in the direction from the outflow end to the inflow end.

Example valve replacement devices and methods of using valve replacement devices are disclosed. An example device includes a framework including a plurality of strut members forming a proximal anchor region. The proximal anchor region includes a plurality of distal crowns and a first connector crown positioned along a distal end of the proximal anchor region. The device further includes a first commissure assembly coupled to the distal end, wherein the first commissure assembly includes a first commissure post, a first connector strut and a second connector strut. The device further includes one or more leaflets mounted at least partly within the framework. Further, the first and second connector struts each include a first end attached to the first commissure post and a second end attached to the first connector crown at a first pivot point. Further, the pivot point is positioned radially outward of the plurality of proximal crowns.

Provided is a prosthetic valve replacement system. A hoop member is at least partially disposed on a valve clamping mechanism. A valve clamping and securing mechanism is configured to present a first form and a second form, and the second form is present after the first form. When the valve clamping and securing apparatus is in the first form, the valve clamping mechanism is configured to capture and clamp autologous valve leaflets. After the radial expansion of a valve stent, the valve clamping and securing apparatus is in the second form.

An integrated transcatheter valve replacement and Piezoelectric Micro-Machined Ultrasonic Transducer (pMUT) enabled ultrasonic imaging system, is disclosed. The system comprising a transcatheter valve replacement assembly having a longitudinal axis, a proximal end, and a distal end. The transcatheter valve replacement assembly comprises a self-expanding valve, a frame and leaflets. A micro-electromechanical (MEMS) based pMUT transducer having MEMS based pMUT array disposed within the distal end of the transcatheter valve replacement assembly. The MEMS based pMUT array comprises a substrate and a plurality of pMUT array elements arranged on the substrate. The integrated transcatheter valve replacement and pMUT enabled ultrasonic imaging system is used in left atrial appendage (LAA), atrial septal defect (ASD), transcatheter aortic valve replacement (TAVR), transcatheter mitral value replacement (TMVR), and transcatheter tricuspid valve replacement (TTVR) or other catheterized structural heart procedures.

The application provides a heart valve positioning device, which comprises a first curved structure, a second curved structure, and a third curved structure. The first curved structure forms a spiral curved structure with a first size in a released state. The second curved structure forms a spiral curved structure with a second size in a released state, and the second size is greater than the first size. The second curved structure has a hollow first cavity for the first curved structure to pass through, forming the third curved structure. The distal end of the third curved structure is a free end, and the proximal end is connected with a delivery system. The third curved structure forms a spiral curved structure with a third size in a released state, and the first size is less than the third size and less than or equal to the second size. The embodiment of the application can reduce left ventricular outflow tract obstruction caused by large-scale movement of the anterior leaflet.

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 relates to an anchor hook and methods of using the same for subannular anchoring of a transcatheter heart valve replacement, and in particular for an orthogonally delivered (side-delivered) transcatheter prosthetic heart valve having a annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the mitral or tricuspid valve from the inferior vena cava or superior vena cava, or trans-septally to the mitral valve, the valve having a height of about 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring a delivery catheter to bend 90 degrees during deployment.

Methods, apparatuses, and systems for performing a valve replacement or repair. Apparatuses may include systems and may include an outer catheter, one or more interchangeable inner catheters, a guidewire and an expandable chordae tendinae deflector. Also described herein are rapid pacing sheaths that may be used with any of these apparatuses and methods.

The invention relates to anchor channels and subannular anchors for a transcatheter heart valve replacement, and in particular for an orthogonally delivered transcatheter prosthetic heart valve having a annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the tricuspid valve from the inferior vena cava or superior vena cava, or trans-atrially to the mitral valve, the valve having a height of about 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring delivery and deployment from a catheter at an acute angle of approach.

A heart valve prosthesis includes a frame defining a central lumen, a valve assembly disposed within the central lumen of the frame, and a plurality of gripper pads. The gripper pads are configured to engage lacerated leaflets of a previously implanted heart valve prosthesis. The gripper pads are configured to separate from each other to separate the lacerated leaflets when the heart valve prosthesis radially expands from a radially compressed configuration to a radially expanded configuration.

The invention relates to the technical field of Christmas tree valve replacement maintenance, and discloses a plugging tool for wellhead Christmas tree non-releasing under-pressure valve replacement, which comprises a shell, a limiting sleeve, a second cylinder barrel, a rubber barrel assembly, a guide shoe, a mandrel, a spring, a first cylinder barrel and a piston which are coaxially arranged. When the plugging tool is fed into a pipeline at the front end of a valve, the rubber sleeve assembly can be axially compressed and radially expanded directly through hydraulic pressurization during use, so that when the rubber sleeve assembly and the inner wall of the pipeline are expanded and sealed, pressurization is stopped and a feeding and pressurizing device is subsequently disassembled, a pressure maintaining effect can be achieved under the action of the spring and the elastic force of the rubber sleeve assembly; after the valve is replaced, the rigid piece can be directly used for pushing the core shaft to realize pressure relief and unblocking; the blocking tool can achieve valve replacement operation under pressure, has the advantages of being reliable in sealing and easy to unblock, and is relatively simple in structure and convenient to operate.

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 disclosure provides a subclinical valve leaflet thrombosis auxiliary identification method, system and signal acquisition device after transcatheter aortic valve replacement, belonging to the technical field of heart information acquisition and identification. The subclinical valve leaflet thrombosis auxiliary identification method is used for auxiliary diagnosis of subclinical valve leaflet thrombosis after transcatheter aortic valve replacement, comprising: collecting a heart sound signal, processing the heart sound signal, obtaining preset parameters of the heart sound signal, and the preset parameters at least including time, frequency and energy; determining a systolic period according to the heart sound signal; identifying the highest energy point in the characteristic interval of the systolic period; obtaining the characteristic frequency corresponding to the highest energy point, and judging whether the characteristic frequency is greater than the threshold frequency, if yes, marking the heart sound signal as an abnormal heart sound signal caused by subclinical valve leaflet thrombosis; if not, marking the heart sound signal as a normal heart sound signal. The method solves the problem that the subclinical valve leaflet thrombosis detection mainly uses multi-dimensional computed tomography, which leads to limited scope of application.

The invention belongs to an atomization device, and provides a miniaturized liquid atomization device and a control method thereof in order to solve the technical problems that an existing cylinder valve is unchanged in replacement, low in safety and incapable of achieving zero leakage. The liquid cavity is communicated with the gas cavity through an on-off device, an atomizer device and a pressure controller in sequence, the gas cavity is communicated with the outside through a switch device and a pressure reducing device in sequence, an outlet of the pressure reducing device is communicated with the outside, and the on-off device, the atomizer device and the pressure controller are integrally arranged between the liquid cavity and the gas cavity. The switching device and the pressure reducing device are integrated at the gas cavity outlet. While the weight is reduced, the leakage risk is greatly reduced.

The application relates to the technical field of gas tree valve replacement maintenance, and discloses a plugging tool for wellhead gas tree pressure-bearing valve replacement without releasing the tool, which comprises a coaxially arranged shell, a limiting sleeve, a second cylinder, a rubber cylinder assembly, a guide shoe, a mandrel, a spring, a first cylinder and a piston. When the valve replacement operation of the gas tree is performed, the plugging tool can be sent into the front-end pipeline of the valve by connecting a feeding and pressurizing device on the shell. In use, the rubber cylinder assembly can be axially compressed and radially expanded by hydraulic pressure, so that the rubber cylinder assembly is tightly sealed with the inner wall of the pipeline. When the pressurizing is stopped and the feeding and pressurizing device is subsequently disassembled, the spring and the rubber cylinder assembly can play a pressure maintaining effect under the action of the spring and the elastic force of the rubber cylinder assembly, so that the reliability of the sealing and plugging is maintained. After the valve replacement is completed, the mandrel can be directly pushed by a rigid member to realize pressure relief and unsealing. The plugging tool can realize pressure-bearing valve replacement operation, has the advantages of reliable sealing, easy unsealing, and relatively simple structure and convenient operation.

The invention relates to constriction devices and methods for deploying a laterally delivered prosthetic heart valve in a native annulus. The present invention relates to anchoring channels and subannulus anchors for transcatheter heart valve replacement (A61F2 / 2412), and in particular for transcatheter prosthetic heart valves with orthogonal delivery of an annulus support frame having a compressible wire unit, the compressible wire unit facilitates rolling and folding of the valve in a longitudinal direction or orthogonal to a central axis of the flow control member, allowing delivery and deployment of a very large diameter valve from the inferior vena cava or superior vena cava to the tricuspid valve, or trans-atrial delivery and deployment to the mitral valve, or delivery and deployment of a very large diameter valve from the inferior vena cava or superior vena cava to the tricuspid valve. The valve has a height of about 5 mm to 60 mm and a diameter of about 25 mm to 80 mm without the need for an over-diameter catheter and without the need for delivery and deployment from the catheter at an acute access angle.

A heart valve replacement device comprises a stent having a first end, a second end, an outer surface, and an inner surface, the inner surface defining a lumen; and a valve disposed within the lumen of the stent, the valve formed from a single sheet of tissue, the valve having an outer surface, an inner surface, and a thickness between the outer surface and the inner surface, the valve comprising at least three leaflets, wherein, the valve is attached to the stent with minimal sutures. The leaflets are formed with a curvilinear surface.

The invention relates to anchor channels and subannular anchors for a transcatheter heart valve replacement, and in particular for an orthogonally delivered transcatheter prosthetic heart valve having a annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the tricuspid valve from the inferior vena cava or superior vena cava, or trans-atrially to the mitral valve, the valve having a height of about 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring delivery and deployment from a catheter at an acute angle of approach.

A method for heart valve replacement comprises forming an incision in a wall of a ventricle of a heart and inserting a delivery apparatus and a prosthetic heart valve through the incision and into the ventricle of the heart. The prosthetic valve comprises a self-expanding frame having an annular main body and a valve member disposed within the annular main body. The prosthetic valve further comprises an atrial sealing member formed by an annular metal ring and a fabric, wherein only the fabric of the atrial sealing member is connected to the main body for enhancing the flexibility and conformability of the atrial sealing member. The method further comprises deploying the prosthetic valve from the delivery apparatus such that the atrial sealing member extends radially outwardly from the main body within an atrium of the heart and the main body self-expands to a deployed state within a native heart valve.

The utility model provides a valve replacing device which comprises a strip-shaped pipeline installed on the side edge of a valve body, the upper end of the strip-shaped pipeline is fixedly connected with a gate valve installer, the upper end of the gate valve installer is fixedly connected with a balloon blocker, the inner end of the balloon blocker is provided with a partition air bag, and the inner end of the partition air bag is fixedly connected with an air storage balloon. According to the scheme, the partition air bag is filled with the air storage balloon, after the partition air bag is filled with flame-retardant gas through the air inlet hose and the partition air bag penetrates into the strip-shaped pipeline to be inflated, the air outlet one-way valve can be opened through an external control terminal, and the flame-retardant gas in the air storage balloon is gradually exhausted; the position area, close to the valve body, in the strip-shaped pipeline is full of flame-retardant gas, the oxygen concentration in the strip-shaped pipeline is reduced, the occurrence probability of dangerous accidents is reduced, and the safety of the replacement, disassembly and assembly process of the valve body outside the strip-shaped pipeline is guaranteed.

A transcatheter heart valve includes a paravalvular seal that is configured for transfemoral delivery. The valve includes a frame and the seal is formed from a plurality of outwardly extending fibers.

A method of delivering a transcutaneous dual valve replacement (TDVR) device to a patient includes the steps of advancing a guide catheter into the heart of the patient, advancing a support wire through the guide catheter and across the mitral valve of the heart of the patient, removing the guide catheter, advancing a delivery sheath over the support wire and across both the aortic valve and the mitral valve of the heart of the patient, advancing the TDVR device over the support wire and through the delivery sheath, removing the delivery sheath, expanding a first segment of the TDVR device in the mitral valve and a second segment of the TDVR device in the aortic valve, and removing the support wire.

The present invention relates to an anchoring channel and a subannular anchor for transcatheter heart valve replacement (A61F2 / 2412), and in particular for an orthogonally delivered transcatheter prosthetic heart valve having an annular support frame having a compressible wire unit that facilitates rolling and folding of the valve longitudinally or orthogonally to the central axis of the flow control component, thereby allowing very large diameter valves to be delivered and deployed from the inferior vena cava or superior vena cava to the tricuspid valve, or delivered and deployed transatrially to the mitral valve, the valve having a height of approximately 5 mm-60 mm and a diameter of approximately 25 mm-80 mm, without the need for an overly large diameter catheter and without the need for delivery and deployment from the catheter at an acute approach angle.

In various embodiments. provided herein are methods, devices and systems to optimize annular orientation of transcatheter valves and thereby facilitate transcatheter aortic valve replacement in the setting of challenging cardiovascular anatomy. These methods, devices and systems are used to treat patients with valvular diseases.

A heart valve replacement device comprises a stent having a first end, a second end, an outer surface, and an inner surface, the inner surface defining a lumen; and a valve disposed within the lumen of the stent, the valve formed from a single sheet of tissue, the valve having an outer surface, an inner surface, and a thickness between the outer surface and the inner surface, the valve comprising at least three leaflets, wherein, the valve is attached to the stent with minimal sutures. The leaflets are formed with a curvilinear surface.

The application relates to the field of medical devices, in particular to a valve replacement system facilitating the capture of valve leaflets, comprising a valve support, a delivery system for delivering the valve support, the valve support being provided with a clamping arm, a linkage rod connected with the clamping arm, and an anchoring ring connected with the linkage rod, wherein the distal end of the linkage rod is detachably connected with the distal end of the delivery system, and the delivery system is operated to push or pull the linkage rod to the distal end, the linkage rod drives the clamping arm to fold to control the included angle between the clamping arm and the valve support; in the application, the opening and closing of the clamping arm can be controlled by operating the delivery system, the loading pipe diameter can be reduced, recovery can be realized, and intracardiac adjustment is facilitated, and the application has good clinical significance.

The present application relates to a kind of artificial valve stents and artificial valve prosthesis, artificial valve stent is used in valve-in-valve surgery, it includes: stent body, for accommodating in the original biological valve in body;And at least three positioning support arms, all positioning support arms are arranged in one end of artificial valve stent, and distribute along the circumference of stent body, one end of each positioning support arm is connected with stent body, the other end of each positioning support arm extends to the direction of the other end of artificial valve stent at the lateral exterior of stent body, and is used for clamping original biological valve.Valve-in-valve surgery, the artificial valve stent can be realized stable and reliable anchoring with original biological valve by unique anchoring structure, and it is suitable for the valve-in-valve replacement of double-layer biological valve.