14 results about "Posterior leaflet" patented technology

A prosthetic heart valve for treatment of a diseased heart valve having native anterior and posterior leaflets that move between an open configuration and a closed position to regulate blood flow through the heart valve during a cardiac cycle of a heart. The prosthetic heart valve having a crescent shaped stent, at least one prosthetic leaflet mounted on an inner surface of the stent, and at least one prong structure coupling a portion of the at least one prosthetic leaflet to a lower ventricular portion of the stent frame. The prosthetic heart valve further having systems for anchoring the upper flared portion of the stent to a posterior portion of the native valve annulus.

An annuloplasty ring is disclosed. The annuloplasty ring includes an outer tube, a plurality of anchors, and at least one synthetic leaflet. The synthetic leaflets are in mechanical communication with the annuloplasty ring at a plurality of points. The outer tube includes a plurality of windows. The plurality of anchors are positioned inside the outer tube and about a perimeter of the outer tube. The plurality of anchors are configured to be emitted from the plurality of windows in order to anchor the annuloplasty ring to a heart valve of a patient.

A mitral valve prosthesis to be implanted in a heart, comprises an asymmetrical ring, the asymmetrical ring is dimensioned to mimic a native mitral annulus of a patient; an anterior flexible leaflet and a posterior flexible leaflet, said leaflets suspended from the asymmetrical ring and configured to substantially coapt with each other; and at least four sets of cords, each set of cords attached to the anterior or posterior leaflet on a first end and attached into a cap on a second end, the cap is configured to be attached onto papillary muscles of the heart on another end of the cap.

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.

During a percutaneous transcatheter procedure, an annuloplasty structure is secured at least partially around an annulus of a mitral valve of a subject by coupling a plurality of tissue anchors to the annulus such that (i) a longitudinal contracting member of the annuloplasty structure extends at least partially around the annulus, and (ii) the plurality of tissue anchors is distributed at least partially around the annulus. A longitudinal density of the anchors along a middle scallop of a posterior leaflet of the mitral valve is at least twice as great as a longitudinal density of the anchors along a lateral scallop of the posterior leaflet, and / or at least twice as great as a longitudinal density of the anchors along a medial scallop of the posterior leaflet. Thereafter, at least part of the annulus is contracted by contracting a longitudinal portion of the annuloplasty structure by tightening the longitudinal contracting member.

The invention provides a mitral valve suturing needle, a mitral valve suturing system and application of the mitral valve suturing needle and the mitral valve suturing system, and belongs to the technical field of surgical instruments.The mitral valve suturing system at least comprises an outer sheath used for guiding a mitral valve clamping and suturing mechanism into the heart; at least one set of mitral valve clamping and suturing mechanism is arranged in the outer sheath; the mitral valve clamping and suturing mechanism comprises an inner clamp, an outer clamp and a mitral valve suturing needle, the mitral valve suturing needle is screwed into a spiral needle channel of the central column, the spiral channel is matched with the mitral valve suturing needle in the non-stress natural state, and the mitral valve suturing needle is hidden in the spiral needle channel of the central column. The effect of dispersing tension can be achieved through the spiral needle inserting mode of the spiral needle. And different fiber directions are adapted, so that the sewing strength of the back leaf is improved. The operation complexity is reduced, and different anatomical structures are adapted. The operation difficulty is reduced by rotary continuous suturing, and accurate regulation and control are supported. The spiral needle structure allows continuous puncture and withdrawal, the suturing efficiency and accuracy can be improved, and the operation time is shortened.

A valve fixation device may include a unitary elongated member biased toward a closed configuration in which at least a pair of tissue engaging surfaces of the elongated member are held in a position proximal to one another by a biasing force. The biasing force is at least equal to a leaflet grasping force, thereby enabling the fixation device to grasp and retain the leaflets as part of a cardiac treatment. A delivery tool including an expander can independently translate the tissue engaging surfaces to enable the heart valve leaflets to be captured and retained between the tissue engaging surfaces. The valve fixation device may include at least two arms, each arm being independently controllable to grasp and capture opposing leaflets of a valve, such as an anterior and posterior leaflet of a mitral valve, to reduce the size of the valve opening and improve cardiac function.

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.

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.

The application relates to the technical field of medical devices, and provides a medical suturing device, which comprises a delivery tube structure, the delivery tube structure is provided with a first through channel arranged along an axial direction of the delivery tube structure, and a first end of the delivery tube structure is provided with a receiving cavity; a fixing mechanism, the fixing mechanism comprises a fixing assembly, an anti-rotation piece and a fixing assembly control rod piece, the fixing assembly is rotatably arranged in the receiving cavity, the anti-rotation piece is rotatably arranged on the fixing assembly, the anti-rotation piece is used for fixing an artificial chordae tendinea, a rotation limiting structure for limiting the anti-rotation piece is arranged on a cavity wall of the receiving cavity, a first end of the fixing assembly control rod piece is connected with the fixing assembly, and when the fixing assembly control rod piece drives the fixing assembly to rotate around the axis of the delivery tube structure, the anti-rotation piece is limited by the rotation limiting structure and cannot rotate around the axis of the delivery tube structure; when the medical suturing device is applied to mitral valve posterior leaflet chordae tendinea implantation surgery, the artificial chordae tendinea can be prevented from being damaged, and the durability of the artificial chordae tendinea is ensured.

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.