73 results about "Valve replacement" patented technology

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.

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.

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 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.

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.

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.

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 invention relates to the technical field of medical data processing, and discloses a heart valve replacement postoperative hemodynamic simulation and curative effect evaluation processing system which comprises the steps that a preset standard artificial valve three-dimensional geometric model is used for replacing a valve area distorted due to metal artifacts in computed tomography data so as to generate a static computational domain grid, the method comprises the following steps: adding a time-varying quantity source item resistance coefficient in a Navier Stokes equation according to a cardiac cycle sequential logic, simulating a valve leaflet opening and closing physical effect under a static grid by adjusting a spatial unit fluid impedance attribute, and resolving a flow field, and establishing a virtual motion mechanism based on a momentum source item to replace complex dynamic grid reconstruction; and the numerical stability and clinical treatment time efficiency of simulation calculation are improved while the geometric boundary fidelity is ensured.

The application discloses a heart valve replacement prosthesis and an outer support thereof, and belongs to the field of medical devices. The outer support comprises an upper top ring, a hemispherical ring support, a contraction transition ring and an inner support fixed section arranged from top to bottom. The hemispherical ring support is a hemispherical support frame for supporting the inner wall of the atrium. The upper top ring is an annular ring formed by connecting the upper vertices of the hemispherical ring support in sequence with flexible material, and is used for abutting against the top of the atrium. The contraction transition ring is a smooth transition curved surface formed by smoothly contracting the bottom of the hemispherical ring support inward, and is used for adapting to the shape of the inner wall of the atrium near the valve annulus. The inner support fixed section is a cylindrical structure extended downward from the bottom of the contraction transition ring, and is used for adapting to the shape of the valve annulus. The application adopts the design features of three-ring fixed type, D-shaped structure, motion isolation and lower flexibility and upper rigidity, forms a unique prosthesis structure matched with the physiological structure inside the atrium, and achieves the technical effects of safe and reliable fixing mode, convenient operation and simple processing.

The application discloses a self-expanding biological valve, which comprises a fixing support, an inflow end support structure, an outflow end support structure and a silica gel suture ring. The fixing support comprises a stretching part which is disconnected after being subjected to an expansion force, and then the valve is automatically expanded at a predetermined position. In the expanded state, the inflow end support structure and the outflow end support structure are outwardly extended in the radial direction relative to the fixing support, and are used for supporting the valve at the predetermined position, continuously exerting outward and / or downward force on the surrounding tissue, and ensuring reliable fixation of the valve. The valve of the application can be used for valve replacement without complicated suture, reduces the operation time, and reduces the risk of postoperative complications. The ingenious design of the valve can realize quick release and reliable fixation of the valve support.

The utility model discloses a valve stent and a valve replacement system, the valve stent comprises an outer stent, the outer stent comprises an atrial stent and a ventricular stent, and the ventricular stent is connected below the atrial stent; the atrial electrode is arranged on the atrial stent, and the atrial electrode is suitable for ablation of nerves in the atrium when powered on; the ventricular electrode is arranged on the ventricular stent, and the ventricular electrode is suitable for ablation of nerves in the ventricular when powered on. Therefore, due to the arrangement of the central atrial electrode and the ventricular electrode of the valve stent, the atrial nerves of a patient can be ablated through the electrified atrial electrode, and the atrium can be timely and effectively defibrillated. Meanwhile, the ventricular nerves of the patient can be ablated through the electrified ventricular electrode, and ventricular defibrillation can be effectively performed in time, so that the ablation efficiency can be improved, and the life safety of the patient can be effectively guaranteed.

The application discloses a kind of left ventricular mass regression risk prediction method after transcatheter aortic valve replacement, belong to postoperative prediction technical field, its purpose is to solve the technical problem that there is no technology in prior art to effectively predict the risk of left ventricular reverse remodeling after mass regression after transcatheter aortic valve replacement.It includes the following steps: obtaining preoperative heart CT image to be predicted;According to the preoperative heart CT image to be predicted, the image-based parameters of epicardial fat are extracted;According to the extracted image-based parameters, calculate the image-based score;According to the image-based score, calculate the risk probability of left ventricular mass regression after transcatheter aortic valve replacement.Using innovative algorithm, the risk value of left ventricular mass regression can be calculated and predicted, and the risk of left ventricular reverse remodeling after mass regression after transcatheter aortic valve replacement can be effectively predicted.

In various embodiments, provided herein are methods, devices and systems to optimize delivery of ring-shaped articles for receiving transcatheter valves or stents. These methods, devices and systems are used to treat patients with valvular diseases. In some embodiments, the device includes at least three cables configured to hold a ring-shaped article having a center hole. The at least three cables are further configured to be anchored to supra-annular tissue at a heart valve peri-annular region. The ring-shaped article is positioned and deployed by means of at least three cables used to embed screws or anchors attached to the ring-shaped article into the supra-annular tissue; this deployed ring-shaped article is configured to receive a replacement heart valve in its inner lumen, thereby acting as a landing zone.

The invention provides a valve replacement system which is used for replacing a native atrioventricular valve and comprises a butt joint device, an anchoring device and a valve prosthesis. The docking device is configured to be positioned through the anchoring and locking device and provide an accommodating cavity; the anchoring and locking device comprises a plurality of anchoring pieces, a plurality of locking pieces and a plurality of flexible linear pieces, wherein the number of the locking pieces is the same as that of the anchoring pieces, and the number of the flexible linear pieces is the same as that of the anchoring pieces. In the deployment completion state, one end of a linear piece is correspondingly and fixedly connected with an anchoring piece, and the other end of the linear piece penetrates through the butt joint device and then is correspondingly and fixedly connected with a locking piece; at least one anchoring piece is anchored into ventricular tissue, and at least another anchoring piece is anchored into annulus tissue or atrial tissue; the linear piece is tensioned by the anchoring piece and the locking piece which are correspondingly located on the two opposite sides of the butt-joint device, so that the butt-joint device is pressed against the native valve ring to be positioned; the valve prosthesis is arranged in the containing cavity of the butt joint device in a penetrating mode and is reliably fixed by the butt joint device.

The utility model relates to an artificial valve anchoring device, a delivery system and a transcatheter heart valve replacement system, the device can radially collapse and expand between a radial collapse structure and a radial expansion structure, and the device comprises a skirt edge part, a main body part and a plurality of connecting pieces; the skirt edge part extends outwards in the radial direction in an umbrella disc shape, and the small-diameter end of the skirt edge part is connected with the main body part; the main body part comprises a plurality of grid units which are connected with one another; the connecting piece is arranged at the far end of the skirt edge part and used for being connected with a conveying device. At least part of the section of the connecting piece is configured to be an elastic deformation section, the elastic deformation section can be in a straightened state in a conveying state and gradually recover to be in a preset nonlinear shape in a release state, and gradual release of the artificial valve anchoring device can be achieved through gradual deformation of the elastic deformation section.

The present disclosure relates to valve replacement devices that are foldable for catheter-based deployment to the site of implantation, as well as systems for the delivery of valve prostheses, including prostheses having the special characteristics of the disclosed valve replacement devices. The devices include highly effective adhering mechanisms for secure and enduring precision implantation. The adhering mechanisms may employ a unique sealing mechanism that includes a cuff that expands slowly whereby the device is not secured in place until the completion of the implantation procedure. The implanted device, optionally together with the cuff, prevents perivalvular leaks and incorporate an appropriate leaflet system for reliable functioning in situ.

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.

The application relates to a kind of artificial valve delivery device and system, artificial valve delivery device includes push assembly, push assembly includes capsule part, catheter part and control part;Capsule part is capsule-like, is composed of distal capsule piece, loading piece and proximal capsule piece, three are connected with first control pipe, second control pipe, third control pipe in catheter part respectively, three control pipes are sequentially arranged from inside to outside, control part can control the axial movement of control pipe, by the movement of first control pipe and third control pipe, the separation of proximal capsule piece and distal capsule piece can be realized, so as to realize the release of artificial valve, artificial valve can be self-expanded after release, to achieve the purpose of valve replacement.

The invention discloses a risk prediction and evaluation method for valve replacement under pressure of a wellhead gas production tree. The method comprises the steps that a gas production tree three-dimensional model is built according to size parameters of the wellhead gas production tree, key parameter variables influencing the performance of a valve are obtained, the real-time failure probability of the valve is calculated, and three-dimensional coordinates of the valve with the failure risk are obtained; calculating the spatial dispersion of the valve based on the distance, calculating the priority index of under-pressure valve replacement in combination with the real-time failure probability of the valve, and planning the sequence of under-pressure valve replacement operation; and calculating a leakage risk coefficient of the under-pressure valve replacement operation process, and evaluating the risk of the under-pressure valve replacement operation process. According to the method, the conversion from empirical judgment to quantitative prediction and from static evaluation to dynamic perception of risk prediction and evaluation of valve replacement under pressure is realized, and accurate decision support is provided for field valve replacement under pressure.

The invention discloses a pipeline butt joint tensioning device and an application method thereof in pipeline valve replacement. The pipeline butt joint tensioning device comprises a first fixed connecting piece and a second fixed connecting piece which are symmetrically arranged on the two sides of a dust removal pipeline respectively; the first fixed connecting piece comprises a first connecting part and a second connecting part in butt joint with the first connecting part, the second fixed connecting piece comprises a third connecting part and a fourth connecting part in butt joint with the third connecting part, and the first connecting part and the second connecting part form a through pipeline containing space A; the third connecting part and the fourth connecting part form a through pipeline containing space B. The through pipeline containing space A and the through pipeline containing space B are coaxially arranged. A fixing base is fixed to the bottom of the third connecting part and the bottom of the fourth connecting part and arranged on a positioning platform, and the bottom of the fixing base is in an inverted-T shape. And the fixed seat is embedded in the groove of the positioning platform.

A system for heart valve replacement includes a collapsible and expandable replacement heart valve and a packaging assembly for storing the replacement heart valve. The packaging assembly includes a funnel extending from a first end to a second end. The funnel has a first interior diameter at the first end and a second interior diameter, the second interior diameter smaller than the first interior diameter. The funnel defines an internal lumen extending between the first and second ends. The funnel defines a plurality of longitudinal slots extending along an interior surface of the funnel between the first and second ends.

A method of performing a post-TAVR PCI procedure includes providing a catheter device including a housing, an outer tubular member coupled to the housing, an inner tubular member slidably received within an interior of the outer tubular member, and a slider coupled to the housing and the inner tubular member, wherein the inner tubular member is configured to slide relative to the outer tubular member. The outer tubular member is advanced into an interior of a TAVR valve disposed in an ascending aorta of a patient and a guidewire is extended from the outer tubular member to cause the guidewire to enter a coronary artery branching from the ascending aorta. The inner tubular member is extended from the outer tubular member into the coronary artery via a sliding of the slider relative to the housing, and the outer tubular member is optionally advanced further over the inner tubular member.

The utility model discloses a valve replacement device for a pipeline with pressure, and belongs to the technical field of pipeline valve replacement. A valve replacing device for a pipeline with pressure comprises a fixing pipe with one end extending into the pipeline with pressure and further comprises a tension bar, the tension bar is sleeved with the fixing pipe, a plastic plugging head is detachably arranged at the end, located in the pipeline, of the tension bar through a first nut, and one end of the fixing pipe abuts against the plastic plugging head. The other end of the tension bar is provided with a driving piece used for pushing the fixing pipe to slide, and the fixing pipe and the tension bar are detachably connected with the under-pressure pipeline through fixing parts. The plastic plugging head is arranged at one end of the tension bar, so that the plastic plugging head expands to plug the pipeline, the operation is simple, the plugging device is suitable for plugging the pipeline with smaller diameter or thinner wall thickness, and under the action of the fixing part, the phenomenon that the plugging head is damaged in the process of assembling and disassembling the valve can be avoided. And the fixed pipe or the tension bar generates axial displacement under the pressure of a medium in the pipeline, so that the use safety and reliability are improved.

Apparatuses, including systems, for performing a valve replacement or repair. Apparatuses may include an outer catheter, 2024 / 148366 one or more interchangeable inner catheters, a guidewire and an expandable chordae tendinae deflector. The outer catheter and inner catheter may be configured to engage with to prevent gaps. The inner catheter may include a chordae tendinae deflector. The outer catheter may be configured as a rapid pacing sheath that may be used with any of these apparatuses.WO

This document provides devices and methods for the treatment of heart conditions. For example, this document provides prosthetic heart valves and transcatheter heart valve replacement methods. The prosthetic heart valves can be configured into a low-profile configuration for containment within a small diameter delivery sheath. The prosthetic heart valves include can include a valve member attached to a stent frame. In some embodiments, the valve member is a molded biomaterial with a novel shape and resulting performance characteristics. Localized protective covering members can be attached to the stent frame to prevent the valve member from contacting the stent frame as the valve member cycles between its open and closed configurations.