31 results about "Chordae tendineae" patented technology

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 present disclosure relates generally to the field of medical devices for delivering artificial chordae tendineae in a patient An anchor for engaging a papillary muscle or heart wall is described, wherein the anchor is movable between a delivery configuration and a deployed configuration. When the anchor is in the delivery configuration the anchor has a first outer dimension and when the anchor is in the deployed configuration the anchor has a second outer dimension. The first outer dimension is smaller than the second outer dimension. The anchor is engageable with a papillary muscle or a heart wall when the anchor is in the deployed configuration. The anchor comprises a plurality of arms coupled at a proximal end thereof to a body portion, at least one arm of the plurality of arms movable between a first position and a second position when the anchor moves from the delivery configuration to the deployed configuration. The plurality of arms each have a distal tip for engaging the papillary muscle or heart wall, wherein as the anchor is moved from the delivery configuration to the deployed configuration, the plurality of arms are movable from an elongated shape to a curved shape.

Methods and devices for transvascular prosthetic chordae tendinea implantation are disclosed. A catheter is advanced into the left atrium. From an atrium side, a leaflet connector carried by a distal end of the catheter can be anchored to a superior surface of a mitral valve leaflet. A needle is axially advanceable through the leaflet connector and through the leaflet. A leaflet anchor having a leaflet suture can be advanced out of the needle to secure the mitral valve leaflet to the leaflet suture. A ventricular anchor is anchored to the wall of the ventricle to secure the ventricular wall to a ventricle suture. The leaflet suture and the ventricle suture may be tensioned and connected by a suture lock to form an artificial chordae.

A catheter for changing or manipulating a shape of a surrounding anatomical structure or position the catheter in relation to said surrounding anatomical structure has distal and proximal ends. Further the catheter includes at least a first body extending along the catheter in the distal end portion of the catheter, wherein said body has an activated state and inactivated state. In said activated state a second diameter or a second volume of the body is bigger than a first diameter or a first volume of the body in said inactivated state. In addition, in said activated state said body is configured to support the catheter to an anatomical structure surrounded the catheter, such as e.g. chordae, blood vessel or urethra, and thereby change a relative position of the catheter and the surrounding anatomical structure and again to change or manipulate the shape of the surrounding anatomical structure or position the catheter in relation to said surrounding anatomical structure.

Systems and methods of atrioventricular valve replacement are provided. In various embodiments, an arch-like support structure is provided that is insertable and implantable into a heart and is positioned in the mitral annulus to replace a native mitral valve. The support structure is operable to support, and various systems comprise leaflet and chord structures operable to control and regular blood flow between chambers of the heart.

A surgical instrument 1 for a valve repair surgery in an animal enables determination of the length of an artificial suture even when the tendinous cord length of a normal tendinous cord is not used as a reference. The surgical instrument 1 for a valve repair surgery in an animal comprises: a support part 20 which is rod-shaped and in which one-side end thereof in the longitudinal direction can abut a ventricle 56 of a heart 50 in an animal; and a suture holding part 30 which is provided at the other-side end of the support part 20, has three projections 32A, 32B, 32C on an end surface, and can abut a valve cusp 52 of the heart 50.

Guide wire apparatuses and methods. Guide wires may be utilized for guiding a delivery apparatus, for example a transcatheter mitral valve delivery apparatus to replace a native mitral valve. A guide wire may include a distal portion. The distal portion may define a central axis and comprise a distal tip. The distal portion may have an undeployed configuration in which the distal tip is contracted medially and centered on the central axis. The distal portion may have a deployed configuration in which the distal tip is expanded radially from the central axis such that, in multiple radial dimensions, the tip is thicker than a size of an opening between adjacent chordae tendineae of the mitral valve. The delivery apparatus may be configured to be passed along the wire to the mitral valve while the distal tip, in the deployed configuration, contacts the adjacent chordae tendineae without passing through the opening.

This invention provides a valve repair device, a valve repair system, and its operating method. The lifting components are all rigid structures, with the proximal end of each lifting component rotatably connected to the distal end of a stop structure. The distal end of each lifting component is rotatably connected to the distal end of a drive rod, allowing the shape of the lifting components to change through axial movement of the drive rod. This enables the lifting components to lift, clamp, and release chordae tendineae within a 0°–360° range, reducing the number of product specifications and significantly increasing the flexibility and convenience of the surgeon's operation. Furthermore, during surgery, if the valve repair device gets caught on the chordae tendineae, the flexible structure allows for a larger angle and smaller diameter in the open state, making release easier.

Various aspects of the present disclosure are directed toward apparatuses, systems, and methods that include device for chordae tendineae repair. The device may include a flexible cord having a first end and a second end; and a helical wire configured to attach to one of the first end and the second end of the flexible cord and anchor the flexible cord to a leaflet of a heart valve; and a capture device having a channel and configured to clamp the leaflet of the heart valve and deliver the flexible cord through the channel to anchor the helical wire to the leaflet.

A method for treating a patient includes delivering a distal portion of an elongate medical device into a ventricle of a beating closed heart of a subject via a primary skin opening and a secondary puncture, utilizing the distal portion of the elongate medical device to engage a plurality of chordae tendineae extending from a first papillary muscle within the ventricle, at least a first one of the plurality of chordae tendineae attached to a first leaflet of an atrioventricular valve located between the ventricle and an adjacent atrium, and at least a second one of the plurality of chordae tendineae attached to a second leaflet of the atrioventricular valve, approximating the engaged plurality of chordae tendineae to increase an amount of closure possible between the first leaflet and the second leaflet, and locking the plurality of chordae tendineae in their approximated condition.

Methods and devices for transvascular prosthetic chordae tendinea implantation are disclosed. A catheter is advanced into the left atrium. From an atrium side, the catheter can be anchored to a superior surface of a mitral valve leaflet and a leaflet anchor can be advanced into the mitral valve leaflet to secure the mitral valve leaflet to a leaflet suture. A ventricular anchor is anchored to the wall of the ventricle to secure the ventricular wall to a ventricle suture. The leaflet suture and the ventricle suture may be tensioned and connected by a suture lock to form an artificial chorda.

Mitral valve prolapse and mitral regurgitation can be treating by implanting in the mitral annulus a transvalvular intraannular band. The band is positioned so that it extends transversely across a coaptive edge formed by the closure of the mitral valve leaflets, to inhibit prolapse into the left atrium. At least one marginal chordae is severed, to permit leaflet closure against the band.

The present disclosure relates generally to the field of medical devices for delivering artificial chordae tendineae in a patient. A system for adjusting tension in an artificial chordae tendineae includes an artificial chordae tendineae coupleable between a clip and an anchor. The clip is engageable with a leaflet of a heart valve while the anchor is engageable with a papillary muscle or heart wall. The anchor includes a body portion, and a locking portion coupleable with the artificial chordae tendineae and configured to allow movement of the artificial chordae tendineae in a first direction while preventing movement of the artificial chordae tendineae in a second direction opposite the first direction. An actuator is coupled to the locking portion for selectively releasing the locking portion to enable selective movement of the artificial chordae tendineae in the second direction.

The present invention provides a method and apparatus for transvascular implantation of newly formed chordae tendineae. [Solution] A method and apparatus for transvascular implantation of artificial chordae tendineae are disclosed. A catheter advances through the mitral valve into the left atrium and left ventricle. A ventricular anchor is deployed from the catheter into the wall of the left ventricle, extending proximal through the catheter, leaving a ventricular suture attached to the anchor. A leaflet anchor is deployed with the leaflet suture extending proximal through the catheter to fix the mitral valve leaflet to the leaflet suture. The leaflet suture is fixed to the ventricular suture to limit the range of movement of the leaflet toward the left atrium. Also disclosed is a mitral valve leaflet restraint assembly that is assembled in its original location, having neopapillary muscle and neochordae tendineae.

The present invention relates to a self-forming prosthetic valve annulus apparatus, comprising a main body core wire, a proximal release structure, a developing member, and a distal protection member. The main body core wire is formed by processing a metal wire having shape memory characteristics, the overall structure of the main body core wire is spiral spring-shaped, and a portion of the main body core wire close to a distal end expands and extends outward along an Archimedean spiral. The proximal release structure is connected to a proximal end of the main body core wire. The developing member is disposed at the portion of the main body core wire close to the distal end. The distal protection member is disposed at a distal end portion of the main body core wire. The portion of the main body core wire close to the distal end expands and extends outward along the Archimedean spiral, thereby greatly improving its probability of winding the chordae tendineae or valve leaflet, and effectively improving the success rate of the mitral valve replacement surgery. During implantation of the prosthetic valve annulus, the end portion expanding outward along the Archimedean spiral can wind around the outer side of the chordae tendineae or mitral valve leaflet, thereby reducing the difficulty of implanting the prosthetic valve annulus, and thus improving the success rate of the mitral valve replacement surgery.

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.

Methods and devices for transvascular prosthetic chordae tendinea implantation are disclosed. A catheter is advanced into the left atrium. From an atrium side, the catheter can be anchored to a superior surface of a mitral valve leaflet and a leaflet anchor can be advanced into the mitral valve leaflet to secure the mitral valve leaflet to a leaflet suture. A ventricular anchor is anchored to the wall of the ventricle to secure the ventricular wall to a ventricle suture. The leaflet suture and the ventricle suture may be tensioned and connected by a suture lock to form an artificial chordae.

The invention relates to atrioventricular valve replacement. Devices and methods are described that include a valve scaffold (20) configured to support a prosthetic valve within a native atrioventricular valve. The valve frame (20) comprises an atrial section (26) and a cylindrical section (22) to which the prosthetic valve leaflet (23) is coupled. A plurality of chordae attraction arms (24) extend radially at least from the ventricular end of the cylindrical section (22). The chordae attraction arm (24) is coupled to the ventricular end of the cylindrical section by a suture (82), and the suture (82) is configured to act as a hinge such that, when released from the radially constrained configuration, the suture (82) is closed when the cylindrical section (22) is held in the at least partially radially constrained configuration. The chordae attracting arm (24) is configured to extend radially outward by pivoting relative to the cylindrical section (22) about the suture (82). Other applications are also described herein.

To provide a surgical instrument for valve repair surgery of an animal capable of determining the length of an artificial thread even when the length of a normal tendon is not used as a reference.SOLUTION: A surgical instrument 1 for valve repair surgery of an animal includes a support portion 20 which is rod-like and has an end portion on one side in a longitudinal direction capable of abutting on a ventricle 56 of a heart 50 of the animal, and a thread holding portion 30 which is provided on an end portion on the other side of the support portion 20, has three protrusions 32A, 32B, and 32C on an end surface, and is capable of abutting on a valve cusp 52 of the heart 50.SELECTED DRAWING: Figure 4

The invention discloses a mitral valve clamping system. The mitral valve clamping system comprises a clamping component, an operation control component and a conveying rod. The gripping member is configured to grip the mitral valve in a first direction. The operation control component is detachably connected with the near end of the clamping component and the far end of the clamping component, and the operation control component comprises a conveying rod. And a conveying rod. Comprising a main body part, a first blocking part and a second blocking part, the first blocking part and the second blocking part are arranged at the far end of the main body part and connected with the far end of the main body part, and the first blocking part and the second blocking part are arranged in a spaced mode in the second direction and jointly define a containing space used for containing at least part of the clamping component. The first direction is perpendicular to the second direction, and the axial direction of the conveying rod is perpendicular to each other. The first blocking part and the second blocking part are arranged on the different sides of the clamping part, and the chordae tendineae can be prevented from entering the clamping area of the clamping part.

The present disclosure relates generally to the field of medical devices for clamping a leaflet of a heart valve. In particular, the present disclosure relates to medical devices, systems, and methods for delivering artificial chordae tendineae in a patient. In an embodiment, a system may include a clamp having a plurality of arms at a first end. The plurality of arms may have a closed configuration in which the arms are oriented toward each other, and an open configuration in which the arms are oriented away from each other. A spring portion may be coupled to the plurality of arms at a second end that is configured to bias the arms to the closed configuration. The arms of the clamp may be configured to fixedly engage with a leaflet of the heart valve. The second end of the clamp may be configured to couple to an artificial chordae tendineae.

The present disclosure relates generally to the field of medical devices for delivering artificial chordae tendineae in a patient. A system for adjusting tension in an artificial chordae tendineae includes an artificial chordae tendineae coupleable between a clip and an anchor. The clip is engageable with a leaflet of a heart valve while the anchor is engageable with a papillary muscle or heart wall. The anchor includes a body portion, and a locking portion coupleable with the artificial chordae tendineae and configured to allow movement of the artificial chordae tendineae in a first direction while preventing movement of the artificial chordae tendineae in a second direction opposite the first direction. An actuator is coupled to the locking portion for selectively releasing the locking portion to enable selective movement of the artificial chordae tendineae in the second direction.

This invention relates to a tricuspid chordae tendineae cutter and an artificial heart valve regurgitation device. The tricuspid chordae tendineae cutter comprises: a capturing tube with a hook-shaped structure at its distal end for capturing the chordae tendineae; and a cutting tube with a cutting portion at its distal end, which cooperates with the hook-shaped structure to cut the chordae tendineae. One of the capturing tube and the cutting tube is movably fitted over the other. The tricuspid chordae tendineae cutter proposed in this invention can artificially create conditions for tricuspid regurgitation, providing a cardiac experimental structure similar to that of a patient with tricuspid regurgitation for evaluating the safety and effectiveness of artificial heart valves.

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 present application discloses a valve repair system for implanting artificial chordae tendineae, including a handle operation device, a valve clamping device, a valve puncturing device, a catheter, and a grasping-feedback device. The valve clamping device includes a clamping-control component, a proximal clamp, and a distal clamp. The valve puncturing device includes a pulling loop, a connecting component, a puncture needle, and a puncture hollow tube sleeved on the puncture needle. The puncture hollow tube is detachably connected to the connecting component. The pulling loop and the connecting component are received in the distal clamp. The handle operation device includes a handle, a puncturing-operation mechanism, a clamping operating mechanism, and a feedback-operation mechanism. The puncturing-operation mechanism is connected to the puncture needle assembly. The feedback-operation mechanism is connected to the grasping-feedback device. The system has minimal puncture damage and can implant multiple sets of artificial chordae tendineae at a time.

A device includes a system for performing valve replacement or repair. The device may include an outer catheter, one or more exchangeable inner catheters, a guidewire, and an expandable chordae tendineae deflector. The outer catheter and inner catheter may be configured to engage to prevent gapping. The inner catheter may include the chordae tendineae deflector. The outer catheter may be configured as a rapid pacing sheath that may be used with any of these devices.

A method includes advancing a delivery assembly through a patient's vasculature toward a native heart valve of the patient, wherein the delivery assembly comprises a first catheter assembly and a second catheter assembly extending through a shaft of the first catheter assembly, and wherein a support member is in an uncoiled, elongated configuration within a sheath of the first catheter assembly. The support member is deployed from the sheath by pushing the second catheter assembly distally relative to the first catheter assembly so that the support member is uncovered by the sheath and the support member extends around native chordae tendineae and native leaflets of the native heart valve. A prosthetic valve is implanted within the native leaflets of the native heart valve such that the native leaflets are frictionally engaged between the support member and the prosthetic valve.

A soft tissue anchor system for implantation in soft body tissue, such as the mitral valve, to hold an artificial line, such as artificial chordae lines. The soft tissue anchor system 200 comprises a