27 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 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 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.

An apparatus includes an ocular drug delivery device having a reservoir configured to hold at least one medication for an eye and a micro-insert configured to be inserted under an anterior leaflet of a capsular wall in the eye. An anterior surface of the micro-insert is configured to contact an inner capsular wall surface of the anterior leaflet. A posterior surface of the micro-insert includes a ridge configured to contact an edge of an artificial intraocular lens.

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.

An annuloplasty band and method of implantation. The band is shaped and sized to avoid the adjacent aortic valve structure and better protects against dehiscence along the muscular mitral annulus. The band is asymmetric and when implanted spans more around the side of the mitral annulus having the posterior commissure than the side with the anterior commissure. The band has a saddle shape with a posterior upward bow centered on a minor axis of the mitral annulus, and a span extending clockwise therefrom is longer than a span extending counter-clockwise. The longer span may be 150° while the shorter span extends 90°. A set of rings may have different saddle profiles and different plan view shapes for different sized bands. A method includes implanting so that the band extends over the posterior leaflet and a short distance past the posterior commissure outside of the anterior leaflet.

An apparatus includes an intraocular pseudophakic contact lens having an optical lens formed of a lens material and multiple haptics radially extending from a peripheral edge of the optical lens and configured to be inserted under an anterior leaflet of a capsular wall in an eye in order to capture and confine the haptics under the anterior leaflet. The haptics include the lens material. Anterior surfaces of the haptics are configured to contact an inner capsular wall surface at the anterior leaflet. The anterior surface of each haptic is continuous with an anterior surface of the optical lens. Posterior surfaces of the haptics include ridges configured to contact at least one edge of an artificial intraocular lens and capture the artificial intraocular lens between the ridges. At least a portion of the posterior surface of each haptic is positioned below a posterior surface of the optical lens. The optical lens is multi-focal.

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.

An apparatus includes an intraocular pseudophakic contact lens having an optical lens and haptics extending radially from the optical lens. The haptics are configured to be inserted under an anterior leaflet of a capsular wall in an eye in order to capture and confine the haptics under the anterior leaflet. Anterior surfaces of the haptics are configured to contact an inner capsular wall surface at the anterior leaflet. Posterior surfaces of the haptics include ridges configured to contact at least one edge of an artificial intraocular lens and capture the artificial intraocular lens between the ridges. The anterior surface of each haptic includes one or more divots or holes.

The present disclosure relates to tissue cutting devices that can be used to cut through a leaflet, such as an anterior leaflet of a mitral valve. In an example, a tissue cutting apparatus comprises a shaft comprising a head portion, a flap pivotably coupled to the head portion, and a wire extending through the shaft and terminating with a cutting portion. The wire is slidably coupled to the flap and the cutting portion is configured to move along the flap. The flap is configured to move between an open state and a closed state, such that the flap proximal end is at a greater distance from the head portion in the open state than in the closed state.

The present invention provides an artificial heart valve comprising a main stent and an artificial valve leaflet, wherein an outflow end of the main stent is connected to an inflow end of the artificial valve leaflet, and when the artificial heart valve is implanted in the heart, the main stent is fixed on a mitral valve annulus above a native posterior leaflet of mitral valve leaflets, and the artificial valve leaflet is sealed against an inner side of the native posterior leaflet and mates with a native anterior leaflet to ensure a unidirectional flow of blood in the left atrium and the left ventricle; wherein, the artificial valve leaflet comprises a valve leaflet stent and a covering, and wherein the valve leaflet stent is a single-layer three-dimensional stent, and the covering covers the valve leaflet stent. The present invention utilizes the artificial valve leaflet for occupation and mating and effectively utilizes the healthy native anterior leaflet, thereby improving the valve leaflet's mating performance and lifespan. The artificial heart valve of the present invention has a compact structure and a small volume, and after implantation, it only occupies the area where the posterior leaflet is, which has little effect on the heart's function, and occupies a small area of the valve orifice, so the impact of blood flow is small, thereby improving the lifespan of the artificial heart valve.

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.

An implantable artificial posterior mitral valve is described, wherein one variant typically includes a frame. A posterior leaflet having one or more scallops may be connected to the frame such that when the frame is deployed, the scallops extend from the frame for docking a native anterior leaflet. At least one arm member may be connected to the frame such that the arm member extends laterally in a curved configuration that is configured to approximate a bend of a native mitral annulus when the frame is deployed, and an anchoring leg may be connected to the frame and extend in an upward direction from a posterior side of the frame such that the anchoring leg extends laterally in a curved configuration that is configured to approximate a bend of the native mitral annulus when the frame is deployed. And a capture zone is defined between the anchoring leg and the rear side. The capture zone may be sized to receive at least a portion of the day then leaflet in an elongated state when the frame is deployed.

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.

The present invention relates to the field of medical devices, and particularly to a multi-dimensionally fixed heart valve prosthesis, which comprises a stent and a valve. The stent includes a valve sewing section and an atrial section. The valve is fixedly connected to the valve sewing section. The valve sewing section is cooperatively connected with the atrial section. A leaflet clamping member is arranged on the valve sewing section, and an anti-disengagement anchoring mechanism is arranged on the atrial section. After the heart valve prosthesis is released, the leaflet clamping member is cooperatively connected with the anterior leaflet of the patient, and the anti-disengagement anchoring mechanism passes through the atrial section and is fixedly connected with the posterior leaflet tissue of the patient. The present invention ingeniously utilizes the physiological and anatomical structure of the heart, sets a leaflet clamping member in the anterior leaflet area for fixing the anterior leaflet, and sets a bi-directional anchoring device in the posterior leaflet area to fix the posterior leaflet area of the patient. The combination of the two enables the valve prosthesis to have multi-dimensional anchoring force, ensuring the anchoring effect of the valve prosthesis in the heart.

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.

An apparatus includes an intraocular pseudophakic contact lens configured to be implanted in an eye and mounted on or attached to an artificial intraocular lens in the eye. The intraocular pseudophakic contact lens includes (i) an optical lens and (ii) haptics extending radially from the optical lens and configured to be inserted under an anterior leaflet of a capsular wall in the eye. Posterior surfaces of the haptics include ridges configured to capture at least one edge of the artificial intraocular lens. The haptics are flexible such that outer portions of the haptics are configured to drive the ridges into the at least one edge of the artificial intraocular lens based on surface pressure from the anterior leaflet against the outer portions of the haptics.

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 invention provides a prosthetic mitral valve and deployment system, comprising: the prosthetic mitral valve comprising: an anchor assembly comprising an expandable anchor frame coupleable with a native mitral valve having an anterior leaflet and a posterior leaflet that cycle between an open valve orientation and a closed valve orientation in which free edges of the anterior and posterior leaflets oppose each other to define a coaptation line, wherein while the anchor assembly is coupled with the native mitral valve the anterior and posterior leaflets continue to cycle; and a valve assembly comprising an expandable valve frame and an occluder attached to the expandable valve frame, the valve assembly selectively coupleable with the anchor assembly; and the deployment system comprising multiple catheters configured to deliver the prosthetic mitral valve, wherein at least some of the catheters are slidably engageable with each other and are releasably coupleable to the prosthetic mitral valve, wherein a first catheter of the multiple catheters is releasably coupleable to the anchor assembly and includes an expandable element that is positioned along the coaptation line between the free edges of the anterior and posterior leaflets while: (i) the first catheter is coupled to the anchor assembly, (ii) the anchor assembly is coupled to the native mitral valve, and (iii) the anterior and posterior leaflets are in the closed valve orientation.

An apparatus includes an ocular drug delivery device having a micro-insert configured to be inserted under an anterior leaflet of a capsular wall in an eye and a reservoir configured to be secured to the micro-insert. The reservoir includes or is configured to release at least one medication for the eye. An anterior surface of the micro-insert is configured to contact an inner capsular wall surface of the anterior leaflet. A posterior surface of the micro-insert includes a ridge configured to contact an edge of an artificial intraocular lens.

To provide an intraocular pseudophakic contact lens with a securing mechanism by an anterior leaflet of a crystalline capsule wall and a related system and method.SOLUTION: An apparatus includes an intraocular pseudophakic contact lens. The intraocular pseudophakic contact lens includes an optical lens configured to at least partially correct a residual ametropia in an eye. The residual ametropia includes an ametropia that exists in the eye after implantation of an artificial intraocular lens in the eye. The intraocular pseudophakic contact lens also includes one or more haptics configured to be inserted under an anterior leaflet of a crystalline capsule wall in the eye in order to capture and confine the one or more haptics under the anterior leaflet and secure the intraocular pseudophakic contact lens against the artificial intraocular lens.SELECTED DRAWING: Figure 1

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.

A device includes an intraocular pseudophakic contact lens having an optic and a haptic extending radially from the optic and configured to be inserted beneath an anterior leaflet of a capsule wall in an eye so as to capture and confine the haptic beneath the anterior leaflet and secure the intraocular pseudophakic contact lens against an intraocular lens in the eye. An anterior surface of the haptic is configured to contact an inner capsule wall surface at the anterior leaflet. A posterior surface of the haptic includes a ridge configured to capture at least one edge of the intraocular lens so as to secure the intraocular pseudophakic contact lens to the intraocular lens. Different portions of the optic provide different amounts of magnification, such that a first portion of the optic provides a first amount of magnification and a second portion of the optic provides a second amount of magnification.

An apparatus includes an ocular drug delivery device (100-1300, 1412) having a reservoir (102-1102) configured to hold at least one medication for an eye (1400) and a micro-insert (104-1104) configured to be inserted under an anterior leaflet (1414) of a capsular wall in the eye. An anterior surface (110) of the micro-insert is configured to contact an inner capsular wall surface of the anterior leaflet. A posterior surface (112) of the micro-insert includes a ridge (114, 810-1110) configured to contact an edge of an artificial intraocular lens (1410).