11 results about "Anterior leaflet" patented technology

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 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.

Embodiments of the present application relate to the field of implantable prostheses, and particularly to a repair system for annulus tissue, which comprises a plurality of first repair devices, a plurality of second repair devices, a sheath and a plurality of locking wire devices. The repair system for annulus tissue provided by embodiments of the present application can precisely repair the position of annulus tissue in need of repair by screwing the anchor into the position of annulus tissue in need of repair, and the anchor screwed into the annulus tissue is not easy to be separated from the annulus tissue, which can increase the reliability of the fixed connection between the anchor and the annulus tissue, thereby facilitating to ensure the effect of repairing the annulus tissue; and the anchor is connected with the posterior leaflet by the first repair device and connected with the anterior leaflet by the second repair device, so as to meet the need of the reliability of the fixed connection between the anchor and the anterior leaflet of the annulus tissue and the posterior leaflet of the annulus tissue, thereby facilitating to ensure the effect of repairing the annulus tissue.

A transapical removal device that can be deployed in a catheter procedure to capture for removal or alteration a mitral valve clip or heart tissue, such as the anterior leaflet of the mitral valve, and methods of use are disclosed. The removal device includes a delivery catheter configured to be deployed near a mitral valve using a guide catheter. The delivery catheter has a snare head at the distal end, which assumes a collapsed state during movement of the delivery catheter through the guide catheter and deployed state for capturing a mitral valve clip or anterior leaflet. The snare head has one or more ablation delivery catheters configured to ablate tissue surrounding the pre-positioned mitral valve clip or anterior leaflet. In some arrangements within the scope of the present disclosure, the removal device includes a deployment mechanism for deploying a new transcatheter valve into the mitral valve.

The invention discloses a stent system for preventing obstruction of a left ventricular outflow tract and an implantation method, and the stent system comprises a stent assembly which is provided with a main body stent, an anchoring part and a control part, and the main body stent is a hollow cylindrical stent formed by a plurality of rhombic grids; one side of the lower end of the main body support is connected with an anchoring part which is of a strip-shaped structure and is tightly attached to the outer wall of one side of the main body support in a natural form, one end of the anchoring part is movably connected with the main body support, and the other free end is connected with the control part to swing under the action of the control part to get away from or get close to the main body support; the conveying assembly is detachably connected with the main body stent and used for conveying the whole stent assembly to a designated position in a human body to achieve implantation, at least three connecting pieces are arranged at the upper end of the main body stent, and the conveying assembly is detachably connected with the connecting pieces at the central point over the main body stent. The stent is implanted in the left ventricular outflow tract in advance to open the mitral valve anterior lobe of the left ventricular outflow tract, and then transcatheter mitral valve replacement is carried out, so that obstruction of the left ventricular outflow tract is avoided.

The invention discloses a balloon dilatation valve with a clamping piece, and relates to the technical field of medical instruments, the balloon dilatation valve comprises a valve support capable of expanding in the radial direction, a functional valve arranged on the inner side of the valve support and the clamping piece connected to the valve support; the clamping piece can move relative to the valve support and is matched with the valve support to clamp the autologous valve leaflet, the clamping piece comprises a plurality of rebounding components with deformation parts, and the rebounding components are converted between bunchy lines and fan-shaped distribution through deformation of the deformation parts. The valve stent further comprises a control sleeve which is used for restraining the clamping piece in the conveying state and adjusting and controlling the included angle between the clamping piece and the valve stent by changing the restraining degree. The mitral valve anterior leaflet is clamped and shortened through the clamping piece, and left ventricular outflow tract obstruction is effectively prevented; meanwhile, stable clamping force is formed by the clamping piece and the valve support, and displacement of the valve is prevented; in addition, the delivery system is small in outer diameter, good in trafficability and suitable for patients with small mitral valve openings and small heart cavities.

A template for a valve construct for replacement of at least one of a mitral valve and a tricuspid valve includes at least an anterior leaflet portion and at least a posterior leaflet portion, each leaflet portion having a proximal edge, a distal edge, and side edges extending between the proximal edge and the distal edge. The template further includes a plurality of substantially straight elongated chordae portions each having a proximal end connected to the distal edge of one of the at least two leaflet portions and a distal end extending therefrom and one or more papillary muscle head portions formed at a commissure between distal ends of at least two of the plurality of chordae portions. A total width of the leaflet portions of the template is substantially equal to a circumference of a native annulus of a heart valve.

The invention discloses a mitral valve forming ring which is used for being sewn at the valve ring position, surrounding an anterior valve leaflet and a posterior valve leaflet, in a mitral valve. The mitral valve forming ring has a continuous peripheral shape surrounding the center hole, the mitral valve forming ring comprises a front section and a rear section which are oppositely arranged, and a pair of junction narrowing sections located at the junction of the front section and the rear section, and the junction narrowing sections are locally arranged in the circumferential direction of the mitral valve forming ring in an outward protruding mode; the junction narrowing section can enable the junction area to be narrowed so as to increase the involution area of the anterior valve leaflet and the posterior valve leaflet in the junction area. According to the mitral valve forming ring, regurgitation of a junction area is accurately restrained through a differential strengthening structure, and the postoperative residual regurgitation rate is reduced; the limitation that an existing product is single in indication is broken through, clinical coverage of all disease causes and multiple disease types can be achieved, and the method is suitable for repairing various complex mitral valve lesions; the bionic physiological structure design is optimized, the biocompatibility and the long-term stability after implantation are improved, postoperative complications are reduced, and the prognosis of patients is improved.

An implantable prosthetic posterior mitral valve is described where one variation generally includes a frame. A posterior leaflet having one or more scallops may be connected to the frame such that the scallops extend from the frame for coaptation against a native anterior leaflet when the frame is deployed. At least one arm member may be connected to the frame such that the arm member extends laterally in a curved configuration configured to approximate a curvature of a native mitral annulus when the frame is deployed, and an anchoring leg may be connected to the frame and extend in a superior direction from a posterior side of the frame and defines a capture region between the anchoring leg and the posterior side. The capture region may be sized to receive at least a portion of a native posterior leaflet in an elongated state when the frame is deployed.

The embodiment of the invention relates to the field of prostheses capable of being transplanted into bodies, in particular to a repair system suitable for annulus tissue, which comprises a plurality of first repair devices, a plurality of second repair devices, a sheathing canal and a plurality of suture locking devices. According to the repair system suitable for the annulus tissue, the anchor nail is screwed into the position, needing to be repaired, of the annulus tissue, so that the position, needing to be repaired, of the annulus tissue is accurately repaired; moreover, the anchor screwed into the annulus tissue is not easy to separate from the annulus tissue, so that the reliability of fixed connection between the anchor and the annulus tissue can be improved, and the effect of repairing the annulus tissue can be ensured; and the first repairing device is used for connecting the anchor with the posterior valve, and the second repairing device is used for connecting the anchor with the anterior valve, so that the requirement for reliability of fixed connection between the anchor and the anterior valve of the annulus tissue and between the anchor and the posterior valve of the annulus tissue is met, and the annulus tissue repairing effect is guaranteed.

This application provides a heart valve positioning device, which is delivered to a heart valve via a delivery device. The delivery device includes a guide. The positioning device includes: a support unit comprising a body and a first cavity penetrating the body; the body having a first end and a second end; the support unit bending in a released state so that the first end and the second end approach each other to form an annular structure; a locking unit capable of engaging with the first end and the second end of the support unit, and the locking unit having two through holes for the guide to pass through; and a skirt circumferentially attached to the body, which is contractible or expandable. The heart valve positioning device of this application can prevent the anterior leaflet of the mitral valve from moving into the left ventricular outflow tract, thus avoiding left ventricular outflow tract obstruction.