2898results about "Heart valves" patented technology

Apparatus and methods for an implant are provided. The implant may have a constrained configuration and a relaxed configuration. The implant may include an outer stent and an inner valve support. The inner valve support may be positioned within the outer stent. The implant may include a transition section spanning between the outer stent and the inner valve support.

A prosthetic valve includes a frame with inflow and outflow ends and a longitudinal axis extending therebetween. The frame is in a radially expanded state defining a radially expanded diameter and is configured to define a partially radially compressed diameter when the frame is in a partially radially compressed state. A sealing skirt coupled to the frame includes inflow and outflow end portions, an inelastic skirt portion with weft and warp threads, and a tensioning element extending circumferentially along the outflow end portion. The sealing skirt includes a terminal outflow edge configured to define a skirt diameter greater or equal to the partially radially compressed diameter and less than the radially expanded diameter when the sealing skirt is in a relaxed state. The weft and warp threads are configured to be oriented at an approximately 45-degree angle to the longitudinal axis when the sealing skirt is in the relaxed state.

A prosthetic heart valves including an annular frame and one or more detachable outer skirts and methods associated therewith are disclosed. The frame includes a plurality of interconnected struts and one or more outer skirts releasably attached to an exterior surface of the frame. In some examples, an outer skirt is attached to the frame via at least one retaining suture formed by a plurality of stitches looped around a pull suture. Removal of the pull suture from the suture line enables the outer skirt and frame to separate as the stitches are pulled through openings in the outer skirt and remain attached to the frame. Removability of the outer skirt can facilitate improvements in implant and explant procedures of the prosthetic valves, such as, for example, valve-in-valve procedures.

The invention relates to a device for use in the transcatheter treatment of mitral valve regurgitation, specifically a coaptation assistance element for implantation across the valve; a system including the coaptation assistance element and anchors for implantation; a system including the coaptation assistance element and delivery catheter; and a method for transcatheter implantation of a coaptation element across a heart valve.

The invention relates to a device for use in the transcatheter treatment of mitral valve regurgitation, specifically a coaptation assistance element for implantation across the valve; a system including the coaptation assistance element and anchors for implantation; a system including the coaptation assistance element and delivery catheter; and a method for transcatheter implantation of a coaptation element across a heart valve.

Various implementations include a sheath system and corresponding expandable introducer. The system includes an elongated introducer body and an elongated core member received within the central lumen of the introducer body. A portion of the introducer body expands in response to the outwardly directed radial force exerted on the central lumen of introducer body by the core member as it moves between the unexpanded and expanded positions.

A multi-directional bending adjustment delivery device (100) and a valve delivery system. The present invention relates to the technical field of medical instruments and devices. The multi-directional bending adjustment delivery device (100) comprises a catheter assembly (200). The catheter assembly (200) comprises a bending adjustment tube (210). The bending adjustment tube (210) comprises a bending adjustment portion (211) and a straightening portion (212) that are rotatably connected to each other. The bending adjustment portion (211) comprises a plurality of snake bone units (2111) connected end to end. One end of each of the snake bone units (2111) is provided with a pair of first connecting lugs (2113), and the other end is provided with a pair of second connecting lugs (2114). Adjacent snake bone units (2111) are pivotally connected to each other by means of the first connecting lugs (2113) and the second connecting lugs (2114). The included angle between the line connecting the centers of the two first connecting lugs (2113) and the line connecting the centers of the two second connecting lugs (2114) of the same snake bone unit (2111) is 0-90°.

Devices and methods for providing a pathway for fluid to flow around a main lumen of a guide catheter are disclosed. As one example, a delivery apparatus can include a handle including an outer housing and a flush port coupled to the outer housing, a shaft extending distally from the handle, and a main lumen extending axially through the shaft, where the main lumen is fluidly coupled to the flush port via a flush lumen extending between the flush port and the main lumen. The delivery apparatus can further include at least one axially extending channel fluidly coupled to and radially offset from the main lumen, the channel extending between a first location that is adjacent to the flush lumen and a second location that is adjacent to a distal end of the shaft.

A prosthesis assembly includes a stent frame that is expandable and configured for being positioned in the ascending aorta, and a receiving socket positioned within a proximal end of the prosthesis assembly. The receiving socket defines a recess for allowing flowthrough of blood into the stent frame. The receiving socket is further configured for selectively receiving a heart valve assembly for replacing a native heart of a patient or maintaining a mode of operation where the socket is empty and blood flows through the socket into the stent frame.

Embodiments of an implantable prosthetic valve are disclosed. The valve can have an annular frame having a plurality of frame members and a skirt assembly. The skirt assembly can include a laminate having a fabric layer sandwiched between a first covering member and a second covering member. At least one surface of the fabric layer can be exposed at one or more windows in the second covering member. The skirt assembly can be coupled to the annular frame by a suture extending through the fabric layer at the one or more windows and around at least one of the plurality of frame members. Methods for making such an implantable prosthetic valve are also disclosed.

A medical device delivery system includes a steering catheter including a first steering ring having a plurality of apertures positioned in the wall of the first steering ring. The plurality of apertures are positioned at spaced distances around a circumference of the first steering ring. A first steering cable passes through a first one of the apertures, and a first return cable passes through a second one of the apertures. A second steering cable passes through a third one of the apertures, and a second return cable passes through a fourth one of the apertures. The first steering cable is positioned about 180 degrees from the second steering cable. A handle is operably coupled to a proximal end of the steering catheter. A first control member controls the first steering and first return cable, and a second control member controls the second steering and second return cable.

A 3-D honeycomb textile can include a textured yarn. The textile can exhibit a heat-shrinkage rate from about 10% to about 60%. The textile can be configured to reversibly change its dimensions under application of stress. Prosthetic valves can have the disclosed textiles as a sealing member. Additionally, prosthetic valves can the disclosed textiles as cushion materials. In addition, methods of making the disclosed textiles and prosthetic valves are described.

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 provides a valve support and an artificial valve with the same, and belongs to the technical field of heart valves. The valve support comprises a support body, a positioning ring and an elastic connecting wire. The positioning ring is arranged in a compressed state and is adapted to be sequentially and serially arranged along an axis with the support body. When the positioning ring is elastically deformed from the compressed state to an expanded state, the positioning ring can be coaxially sleeved on the support body through the traction of the elastic connecting wire. After the valve support is implanted, the positioning ring can be self-expanded to the expanded state through elastic deformation and can be coaxially sleeved on the support body according to the traction of the elastic connecting wire. Therefore, the positioning ring and the support body can be simultaneously positioned during the implantation operation. Due to the traction of the connecting wire, the support body can be self-positioned according to the positioning ring, thereby saving the separate positioning operation of the positioning ring and the support body and making the operation more convenient.

A system for loading a delivery apparatus including a crimping device and a loading assembly. The crimping device having a housing including a funnel segment and an outlet in communication with the funnel segment, and an actuator configured to advance a radially expanded prosthetic device at least partially through the funnel segment and outlet thereby partially crimping the prosthetic device. The loading assembly including a support tube disposable over at least a portion of a capsule of a delivery apparatus, the loading assembly comprising an inlet end configured to be disposed adjacent the outlet of the crimping device such that the loading assembly can be axially advanced over the partially crimped prosthetic device to move the prosthetic device into a fully compressed configuration.

Prosthetic heart valves and methods for assembling prosthetic heart valves are disclosed. As one example, a prosthetic heart valve includes a frame, commissure support elements, and leaflets, each leaflet comprising a body and opposing commissure tabs, each commissure tab folded over from a corresponding body to form a bend between the commissure tab and body and arranged adjacent to another folded commissure tab of an adjacent leaflet to form a pair of commissure tabs that is coupled to one commissure support element to form a commissure. Each commissure tab is secured to the commissure support element via a reinforcement member positioned against the commissure tab, adjacent to the bend, and secured to and / or at least partially wrapped around the commissure tab and the commissure support element, the reinforcement member comprising a flexible body and a more rigid, central portion, the central portion positioned along a height of the commissure tab.

A prosthetic heart valve includes a collapsible stent and a valve assembly disposed within the stent. A first cuff is disposed adjacent the stent. A second cuff having a distal edge facing the outflow end of the stent is disposed about the stent radially outward of the first cuff and the stent. The stent may include a plurality of fingers each having a first end coupled to a corresponding cell of the stent and a free end adapted to extend radially outward of the corresponding cell. The distal edge of the second cuff may be coupled to the fingers at spaced locations around the circumference of the stent to position the distal edge radially outward from the corresponding cells at the spaced locations. Various stent struts may be tapered to reduce the stent circumference in the collapsed condition, and to improve the fatigue resistance and / or bendability of the stent.

This invention relates to the field of medical devices, and more particularly to a valve clip with a locking mechanism, comprising a first clamping arm, a second clamping arm, a connecting member, a push-pull device, and a locking device. The locking device partially cooperates with the connecting member, and includes a locking head and a self-locking rod. The connecting member is hinged to the first clamping arm and the second clamping arm respectively. The clamping arm includes a long arm and a short arm. One end of the long arm is hinged to the push-pull device, and one end of the short arm is provided with a locking part. When the push-pull device is operated to increase the angle between the long arms of the first and second clamping arms, the locking part on the first clamping arm and the locking part on the second clamping arm are partially misaligned. When the push-pull device is operated to decrease the angle between the long arms of the first and second clamping arms, the locking device is moved to allow the locking head to engage with the locking part and lock.

The present disclosure relates to implantable, mechanically expandable prosthetic devices, such as prosthetic heart valves, and to assemblies and methods for facilitating change in diameter of such prosthetic devices.

A valve delivery system includes a valve and a delivery device. The valve is provided with a fixing part (1) and a fixing hole (11). The delivery device includes an embolic wire assembly (2) and a retraction assembly (3). The embolic wire assembly (2) includes an embolic wire (21). The retraction assembly (3) includes a fixing claw (31). The fixing claw (31) is provided with a limiting hole (32) and is elastic. When the fixing part (1) passes through the limiting hole (32), the embolic wire assembly (21)... 2) It can pass through the fixing hole (11) and restrict the fixing part (1) from disengaging from the limiting hole (32) so that the valve is in a connected state. When the embolism (21) disengages from the fixing hole (11), the fixing part (1) disengages from the limiting hole (32) under the elastic force of the valve, and the valve is in a disengaged state. By controlling the valve with the elastic fixing claw (31) and embolism (21), the valve can be delayed and controllable released, thereby reducing the risk of valve displacement and damage to the human body caused by excessive deformation during valve release.

The utility model is suitable for the technical field related to medical instruments, and provides a valve auxiliary system sheath which comprises a shell assembly and a catheter sheath tube arranged on the shell assembly. The bending adjusting handle is used for adjusting the angle of the tail end of the catheter sheathing canal, and the bending adjusting handle is connected with the shell assembly; the catheter sheath is used for being matched with the catheter sheath tube to achieve introduction of an interventional instrument or conveying of an auxiliary instrument; the flushing valve is used for conveying medicaments, and the flushing valve is communicated with the catheter sheath through an extension tube body; the catheter sheath tube, the catheter sheath, the flushing valve and other components are arranged in a matched mode, so that the dilator can be always kept in the catheter sheath tube in the original position in the process that the catheter sheath tube enters the access blood vessel of a patient, blood cannot permeate out of a product, use is convenient, and the valve positioning accuracy and the operation safety are effectively improved.

A loading device for crimping a prosthetic heart valve without an internal support member includes a cone having a cone body with a tapering diameter and defining a lumen therethrough and a cone base extending radially from the cone body. The cone base may couple to a funnel also having a tapering diameter and defining a lumen therethrough. The cone may be coupled to the funnel such that the lumen of the cone is aligned with the lumen of the funnel along a longitudinal axis of the loading device. The cone body may define a plurality of slots configured to receive the tines extending from the prosthetic heart valve as the valve is pulled through the loading device and compressed from an expanded state to a collapsed state by the tapering diameter of the cone and the funnel to be disposed inside a delivery device.

A prosthetic valve includes a radially expandable and compressible frame, a leaflet assembly comprising a plurality of leaflets coupled to the frame, and an outer skirt positioned around an outer surface of the frame. The outer skirt includes a tissue layer and a non-tissue layer. The tissue layer has a fibrous side and a smooth side. The non-tissue layer is coupled to the smooth side of the tissue layer. The outer skirt is positioned so that the fibrous side of the tissue layer faces away from the frame and the non-tissue layer faces towards the frame.

A medical device delivery arrangement that includes a medical device, a delivery system, and a filter arrangement. The delivery system includes a catheter and a guide shaft that are configured to move independently from one another. The filter arrangement is configured to move between a constrained-collapsed position and a deployed position. The filter arrangement includes a filter frame and a filter material. The guide shaft is moveable relative to the filter arrangement between a constraining and non-constraining position. The filter arrangement is positioned in the constrained-collapsed position when the guide shaft is in the constraining position due to the guide shaft being positioned partially or fully over the filter arrangement. The filter arrangement is in the deployed position when the guide shaft is in the non-constraining position due the guide shaft being positioned distal to the filter arrangement.

A delivery device for percutaneously delivering a stented prosthetic heart includes a sheath, a handle, and adjustment device including a fine adjustment mechanism, and an outer stability shaft. The sheath defines a lumen and is configured to compressively constrain the stented prosthetic heart valve. The handle is coupled to the proximal portion of the sheath and includes an actuator mechanism coupled to a proximal portion of the sheath that is configured to selectively move the sheath relative to the housing to release the stented prosthetic heat valve. The adjustment device is coupled to the handle and includes an adjustment lumen through which the sheath and the handle slidably extend. The outer stability shaft is coupled to the adjustment device. The fine adjustment mechanism is configured to selectively move the handle and the sheath relative to the adjustment device and the outer stability shaft.

A method for assisting a heart ventricle can comprise providing a longitudinally expandable member that is reversibly expandable along a longitudinal dimension, wherein the longitudinally expandable member can include adjacent abutting portions meeting at respective bends that form acute angles along the longitudinal dimension. The method can include securing a first end portion of the longitudinally expandable member to a first wall portion of the heart ventricle via a first anchor engagement feature associated with the first end portion. The method can include securing a second end portion of the longitudinally expandable member to a second wall portion of the heart ventricle via a second anchor engagement feature associated with the second end portion, the plurality of bends between the first and second end portions allowing augmenting expansion of the heart ventricle using spring force of the longitudinally expandable member to thereby improve heart function.

A system for crimping and expanding a medical device may include a delivery system with a handle, a catheter, and an inflatable balloon. A syringe may receive inflation media and may be configured to be received on a balloon inflation system and to be coupled to the delivery system. A crimper may have a collapsible iris assembly configured to receive the medical device therein. The crimper may be configured to mechanically couple to the balloon inflation system. The balloon inflation system may actuate the crimper to crimp the medical device onto the balloon when the medical device is received within the iris assembly. The balloon inflation system may be configured to actuate the syringe to advance the inflation media from the syringe to the balloon to expand the balloon and to expand the medical device that is crimped onto the balloon.

Disclosed herein is a furcated suture comprising a first portion comprising two or more core yarns and a body yarn, wherein the furcated suture comprises a second portion comprising two or more branches, and wherein each branch comprises at least one yarn of the two or more core yarns of the first portion. Also disclosed are delivery systems and devices utilizing the described herein furcated sutures. Methods of making the same are also enclosed.

This application relates to prosthetic heart valves. Disclosed are embodiments of a radially collapsible and expandable prosthetic heart valve. The valve frame can have a tapered profile when mounted on a delivery shaft, with a smaller diameter at the inflow end portion than at the outflow end portion. The valve can include generally V-shaped leaflets, reducing the amount of material in the inflow end of the frame. An outer skirt can be secured to the outside of the inflow end portion of the frame, with longitudinal slack when the valve is expanded and lying flat against the frame when the valve is collapsed. An angularly woven inner skirt can be axially elongated with the frame. Side tabs adjacent the leaflets can extend through and be secured to window frame portions of the frame to form commissures. The window frame portions can be recessed radially inward relative to the surrounding frame portions when the valve is crimped on a delivery shaft.