27 results about "Atrial wall" patented technology

A method and apparatus for treatment of hypertension and heart failure by increasing secretion of endogenous atrial hormones by pacing of the heart. Pacing is done during the ventricular refractory period resulting in premature atrial contraction that does not result in ventricular contraction. Pacing results in the atrial wall stress, peripheral vasodilation, ANP secretion. Concomitant reduction of the heart rate is monitored and controlled as needed with backup pacing.

A method and apparatus for treatment of hypertension and heart failure by increasing secretion of endogenous atrial hormones by pacing of the heart. Pacing is done during the ventricular refractory period resulting in premature atrial contraction that does not result in ventricular contraction. Pacing results in the atrial wall stress, peripheral vasodilation, ANP secretion. Concomitant reduction of the heart rate is monitored and controlled as needed with backup pacing.

The present disclosure provides collapsible medical devices that may be introduced via a delivery device into a pre-existing patent foramen ovale or trans-septal puncture hole and left in place to provide both a sealing function on the atrial wall and a septal-access function for additional procedures. The disclosed medical devices include a penetrable and re-sealable gasket material disposed in an open lumen in the medical device. This penetrable and re-sealable material allows catheters or other medical devices to pass therethough for providing additional therapy to an individual. By allowing the access point or portal to be opened by a guidewire or another medical tool, the medical devices as disclosed herein may be particularly suitable for a variety of cardiac procedures including, for example, atrial fibrillation, mitral valve replacement or repair, left atrial appendage closures, and the like.

The application relates to the technical field of medical devices, in particular to a valve support for mitral valve replacement, which comprises an annular support formed integrally, one end of the support is provided with an anchoring part, and the other end is provided with a connecting part; the connecting part comprises a connecting arm, the connecting arm comprises a bending section and a connecting section which are connected to each other, the bending section is integrally extended from the support, and the connecting section is provided with a flexible section used for abutting against the atrial wall; the anchoring part comprises a bendable anchoring arm, one end of the anchoring arm away from the support is provided with a clamping part used for anchoring the valve, and a fixing part used for preventing the valve from rotating. The valve support has the beneficial effects that the anchoring performance of the valve support is enhanced, and the risk of paravalvular leakage is reduced.

The present invention discloses a device for repairing tricuspid regurgitation by accordion chordae tendineae, comprising: a chord-gathering member for wrapping around and accordion-gathering the chordae tendineae; a fixing member connected to the chord-gathering member for positioning the device for repairing tricuspid regurgitation by accordion chordae tendineae; and a counterweight block at the connection between the chord-gathering member and the fixing member for stabilizing the chord-gathering member. The present invention effectively prevents the device for repairing tricuspid regurgitation by accordion chordae tendineae from moving upward by adding a counterweight block between the accordion-gathering hollow rod of the chord-gathering member and the fixing member. The position of the counterweight block can be adjusted to adjust the center of gravity of the device for repairing tricuspid regurgitation by accordion chordae tendineae, further stabilizing the device and improving its fit with the heart, such as the atrial wall. Furthermore, the counterweight block is connected to the accordion-gathering hollow rod and the fixing hollow rod via threads, allowing the position of the counterweight block to be adjusted in advance according to the patient's heart shape.

This application relates to a head electrode assembly and an ablation catheter. The head electrode assembly is disposed at the distal end of the catheter assembly of the ablation catheter. The head electrode assembly includes a tip, a pressure sensor, and a limiting member. The tip has a receiving space extending axially to the proximal end face of the tip, and the tip is used to release ablation energy. The pressure sensor is located in the receiving space and at least axially abuts against the tip to detect external pressure on the tip. The pressure sensor is configured to sense at least one of the axial pressure and radial pressure on the tip. The limiting member is disposed at the tip, and the limiting member and the tip are configured to at least jointly limit the axial displacement of the pressure sensor. The pressure sensor can sense the contact pressure between the tip and the tissue, reducing the occurrence of excessive contact force between the tip and the tissue, thereby reducing tissue damage and lowering the risk of damage to the atrial wall and adjacent tissues; it also helps to reduce the occurrence of insufficient contact force between the tip and the tissue, leading to poor contact between the tip and the tissue.

The invention relates to the technical field of medical instruments, in particular to a valve stent for mitral valve replacement, which comprises an integrally formed annular stent, one end of the stent extends to be provided with an anchoring part, and the other end of the stent extends to be provided with a connecting part; the connecting part comprises a connecting arm, the connecting arm comprises a bending section and a connecting section which are connected with each other, the bending section integrally extends out of the stent, and the connecting section is provided with a flexible section used for being attached to the atrial wall; the anchoring part comprises a bendable anchoring arm, and the end, away from the support, of the anchoring arm is provided with a clamping part used for anchoring the valve and a fixing part used for preventing the valve from rotating. The valve support has the advantages that anchoring performance of the valve support is enhanced, and perivalvular leakage risk is reduced.

A method of calculating an atrial wall thickness through a device including a processor and a memory according to an embodiment of the present disclosure may include (a) receiving image data for a patient's atrium as input data, (b) calculating endocardial and epicardial borders corresponding to starting and ending points of the atrial wall thickness from the received input data, and (c) calculating the patient's atrial wall thickness using the calculated endocardial and epicardial borders, wherein the image data for the patient's atrium received in the step (a) is a plurality of mask label image data for respective tomographic images of the patient's atrium acquired from computed tomography (CT) scans for the patient's atrium, and the mask label image data is data in which one or more pixels corresponding to an atrial wall region including the patient's atrium and an inner region of the atrium, other regions within the patient's heart disposed around the patient's atrium, and regions other than the patient's heart, respectively, are assigned with labels having different numerals for the respective regions.

The present invention discloses a valve ring shrinking device, which includes a valve ring positioning mechanism and an anchoring shrinking mechanism. The valve ring positioning mechanism includes a stent body, a developing connecting tube and a developing fixing tube. The stent body is made of memory alloy wire bent and heat-set, including a left wing, a right wing and a plurality of positioning legs extending downward. The stent body can be shrunk and installed in a catheter before surgery, and can be automatically expanded and opened in the heart after being released from the catheter during surgery. After opening, the left wing and the right wing are adaptively fitted and abutted with the atrial wall, and the positioning legs are inserted and positioned at the junction of the two leaflets of the valve ring. The ends of the left wing and the right wing that are close to each other are fixedly connected to the bottom end of the developing fixing tube after crossing twice and forming a stress buffer ring extending forward. The present invention has the advantages of having a valve ring positioning mechanism and an anchoring shrinking mechanism, the former realizes the positioning of the valve ring, and facilitates the latter to be accurately anchored, thereby ensuring that the transcatheter tricuspid regurgitation repair technology has a better surgical effect.

The present application provides a heart valve repair component, which belongs to the field of medical device technology. The repair component includes: a stable stent, a balloon body and an auxiliary frame. The stable stent includes a plurality of support rods distributed circumferentially, and each support rod is interconnected to form a deformable stable stent, and in the expanded state, each support rod at the inflow end of the stable stent is gathered along an annular surface to a first center. The balloon body is arranged at the outflow end of the stable stent. The auxiliary frame is used to fix the balloon body to the native leaflet, so as to achieve the cooperation between the balloon body and the native leaflets. In the expanded state, the stable stent of the heart valve repair component of the present application, each support rod at the inflow end of the stable stent is gathered along an annular surface to a first center, the local bending strain of the stable stent of this structure is small, the difficulty of pressing and gripping is small, the stable stent is not easy to be damaged, and the stable stent is better fitted to the atrial wall after expansion, so that the posture of the repair component is more stable after the component is implanted.

A method and apparatus for treatment of hypertension and heart failure by increasing vagal tone and secretion of endogenous atrial hormones by excitory pacing of the heart atria. Atrial pacing is done during the ventricular refractory period resulting in atrial contraction against closed AV valves, and atrial contraction rate that is higher than the ventricular contraction rate. Pacing results in the increased atrial wall stress. An implantable device is used to monitor ECG and pace the atria in a nonphysiologic manner.

The present invention relates to a direct puncture adjustable mitral valve repair device, belonging to the technical field of medical devices. It comprises an atrial septum anchoring device 1, a coronary sinus great cardiac vein or heart wall anchoring device 2 and a stretching line; a stretching line is arranged between the atrial septum anchoring device 1 and the coronary sinus great cardiac vein or heart wall anchoring device 2; the atrial septum anchoring device 1 is provided with a structure for adjusting the position of the stretching line. The present invention overcomes the defects of the prior art, and the position and angle of the stretching line are adjusted during the implantation of the device to obtain the best shortened anterior-posterior diameter of the heart, thereby improving mitral valve regurgitation. A one-way locking anchor is attached to the stretching line that tightens the atrium to prevent the stretching line from loosening and falling off, and plays the role of locking after stretching and shortening the anterior-posterior diameter of the atrium; the fixed end of the coronary sinus great cardiac vein or heart wall anchoring device adopts a barbed anchor or a spring anchor to prevent damage to the atrial wall or blood vessels, increase the contact area with the tissue, enhance stability, and promote tissue endothelialization.

The utility model relates to the technical field of medical instruments, in particular to an auxiliary device for atrial ablation treatment, which comprises a retractable and expandable support body, the support body is used for opening the atrium after being expanded in the atrium, and the expanded support body is of a hollow structure and is attached to the wall of the atrium. The hollow-out area of the supporting body provides space for atrial ablation treatment operation. After intervention, the support main body can expand in the atrium to open the atrium and limit the contraction and deformation of the atrium, so that the difficulty of determining an ablation point in the atrial ablation treatment can be reduced, an operator can place an ablation guide wire for the atrial ablation treatment at a required position more accurately and quickly, and the operation time of the atrial ablation treatment is shortened; meanwhile, in the working process of the ablation guide wire, the atrial wall cannot generate large relative displacement due to the existence of the supporting main body, so that accurate treatment and energy transfer can be achieved, a more ideal treatment effect is achieved, the operation difficulty of an operator is reduced, and the operation effect is improved.

The invention discloses an atrial septum puncture needle, a puncture mechanism and a puncture instrument, and relates to the field of medical instruments.The puncture needle body comprises a puncture section and a pushing section, and the near end of the puncture section is movably connected with the far end of the pushing section; the far end of the puncture section is provided with a triangular prism surface, the puncture section can axially rotate along the pushing section, the peripheral surface of the near end of the puncture section is provided with a clamping groove, the clamping groove is of a groove structure which is formed in the mode that the outer wall of the puncture section is sunken in the radial direction, the far end of the pushing section is provided with a clamping ring, the clamping ring is of a protruding structure which is formed in the mode that the outer wall of the pushing section protrudes in the radial direction, and the outer wall of the clamping ring abuts against the outer wall of the clamping groove. When a puncture operation is carried out, the puncture section is rotated, the atrial septum is punctured on the three-prism surface and cut in the radial direction at the same time, so that the puncture section can puncture the atrial septum more easily, the puncture force of a doctor operating the puncture needle body is small, and the phenomenon that after the atrial septum is punctured, the puncture needle cannot be damaged is avoided. And the puncture needle body punctures the atrial wall to cause operative complications, so that the safety of an operation is improved.

The invention discloses a personalized heart model atrial wall thickness measuring method based on MRI (Magnetic Resonance Imaging), and belongs to the field of cardiac medicine. According to the method, a personalized heart model is established by using an MRI image, an atrial intima and an atrial adventitia are segmented, a Laplace-Dirichlet parameterization method is utilized to distribute transmural values for space points of an atrial wall, a myocardial is divided into a plurality of myocardial layers based on the transmural values, and then full-layer mapping is realized through cone space search, new mapping plane generation and layer thickness accumulation. Finally, the atrial wall thickness is obtained through low-pass filtering abnormal value elimination and inverse distance weighted interpolation processing, the measurement deviation generated by myocardial abnormal deformation caused by diseases is solved, and a new basis is provided for formulating a personalized atrial fibrillation ablation operation.

The invention provides a left atrium wall thickness evaluation and intraoperative navigation method and system based on artificial intelligence. Comprising the steps of collection and preprocessing of multi-modal medical image data, artificial intelligence image segmentation under topological constraints, three-dimensional structure reconstruction and inner and outer surface separation, wall thickness calculation and risk assessment, visual mapping interaction of wall thickness and risk levels, and intraoperative navigation and dynamic adjustment. The system automatically identifies a left atrium structure through a deep learning model, introduces topological consistency constraint to improve segmentation precision, and realizes quantitative measurement of wall thickness and high-risk region identification through three-dimensional reconstruction and geometric analysis. The method supports intra-operative real-time image synchronization and path dynamic updating, and has closed-loop navigation and risk early warning capabilities. According to the invention, accurate evaluation of the thickness of the left atrial wall and intelligent navigation in the operation can be realized, and the safety and individualized level of treatment of arrhythmia such as atrial fibrillation and the like are improved.

The application relates to the field of occluders, in particular to a double-layer left atrial appendage occluder, which comprises a conveying pipe, a pushing structure and an occlusion structure, the conveying pipe is internally provided with a pushing steel cable, the left end of the pushing steel cable is provided with a pushing head, the upper end of the conveying pipe is provided with a liquid injection pipe, the right end of the conveying pipe is connected with the pushing structure for sending the occluder, and the pushing structure is internally placed with the occlusion structure. The specification of the occluder is selected, the sheath tube mark position is flush with the left atrial appendage opening, whether the conveying steel cable is connected with the conveyor is checked, the barb is safe, stable, easy to recycle, not easy to fall off in the implantation process; the barb can be recycled and unfolded repeatedly, the barb does not deform, the hook-shaped distal end reduces the risk of damaging the atrial wall, the opening design makes the occlusion more stable, the porosity and thickness are moderate, the thrombus overflow is effectively prevented, the weaving mode is beneficial to endothelial cell proliferation, the endothelialization process is accelerated, and the use effect of the occluder is improved.

The present invention relates to the field of medical device technology, and in particular to a mitral valve device and a method of use, comprising a stent and a leaflet, wherein the stent comprises an outer stent and an inner stent, and the outer stent is sewed flexibly through a suture membrane to sew a flexible connection, wherein the upper end of the outer stent comprises an outward expansion frame for being placed at the atrial end, and a lower end barrel-shaped frame receiving the upper end and extending from the atrial end to the ventricle through the valve ring, wherein one side of the outward expansion frame has a highly raised atrial wall fitting surface; the outer peripheral side of the barrel-shaped frame has a plurality of raised structures near the valve ring; the inner stent is cylindrical, and the leaflet is sutured in the inner stent through a clip; the end of the stent has a tightening structure, and the tightening structure is connected to an anchor through a drawstring. The mitral valve device of the present invention and a method of use thereof can better adapt to the anatomical structure of the heart through a double-layer stent structure and an asymmetric outer stent, reduce the influence of heart movement on the inner stent and the leaflet, ensure the effectiveness of the device, and extend the use time of the device.

The invention provides a vena cava cannula assembly, relates to the technical field of medical instruments, and is used for improving the safety of cardiac surgery. The vena cava cannula assembly comprises a vena cava body which is provided with an insertion end and an in-vitro end which are communicated with each other; the positioning ring is connected with the venous catheter body in a sliding manner; the umbrella-shaped clamping ring is slidably arranged on the venous catheter body in a sleeving mode and located on the side, close to the insertion end, of the positioning ring, a notch is formed in the side wall of the umbrella-shaped clamping ring, a clamping space is defined by the umbrella-shaped clamping ring, a clamping opening is formed in the side, facing the insertion end, of the clamping space, and the notch is communicated with the clamping space. Therefore, the positioning ring can be prevented from falling off, medical negligence can be avoided, and the safety of an operation can be improved. Meanwhile, the insertion position of the venous catheter body can be tightened through sliding of the umbrella-shaped clamping ring, so that the hemostatic effect of preventing bleeding caused by avulsion of the atrioventricular wall can be achieved, and the surgical efficiency can be improved.

The invention relates to a valve stent and a heart valve replacement device. The heart valve replacement device comprises a valve support and a valve prosthesis, the valve support comprises a support body and a plurality of flange extension sections, the support body is used for bearing the valve prosthesis, and the projection contour of the support body is non-circular on a projection plane perpendicular to the central axis. The flange extending sections are arranged on at least part of the edge of the blood input end of the support body at intervals. Therefore, when the valve stent is anchored on a native valve ring of a heart, the stent main body can be matched with the contour shape of the native valve ring, so that the interaction between the valve stent and a weak tissue part of the native valve ring is smaller; and the damage risk of the heart valve device implanted into the human heart to the weak part of the ventricle or the atrial wall tissue is reduced. Compared with the stent main body, the flange extension section has better compliance, so that the fitting degree of the stent and the atrial wall can be improved, and the risk of perivalvular leakage after the stent is implanted into the heart is reduced.

This invention relates to the field of medical device technology, and more particularly to an auxiliary device for atrial ablation therapy. The device includes a contractile and expandable support body, which expands within the atrium to open it. The expanded support body has a hollow structure and adheres to the atrial wall, providing space for the atrial ablation procedure. After intervention, the support body expands within the atrium to open it, limiting atrial contraction and deformation. This reduces the difficulty of determining the ablation point during atrial ablation, allowing the operator to place the ablation guidewire more accurately and quickly, shortening the procedure time. Simultaneously, during the ablation guidewire's operation, the atrial wall does not undergo significant relative displacement due to the support body, thus achieving precise treatment and energy transfer, resulting in more ideal therapeutic effects, reduced operator difficulty, and improved surgical outcomes.

The application belongs to the field of medical devices, and particularly relates to a tricuspid valve prosthesis with a sealing device fixed on an atrioventricular septum, which comprises a stent, artificial valve leaflets, a sealing device and an anchoring member, the artificial valve leaflets are arranged in the stent, the proximal end of the stent is fixed on the atrioventricular septum tissue of a patient through the anchoring member, the sealing device comprises an atrium section, one end of the atrium section is connected to a fixed point at the distal end of the stent and extends downward to form a ventricle section which is convex to the outside of the stent, after the stent is installed in place, at least part of the atrium section is attached to the atrium wall, the native valve ring is located between the atrium section and the ventricle section, when the atrium wall extrudes the sealing device, the other end of the atrium section swings towards the center of the stent with the fixed point as a fulcrum, and the atrium section further drives the ventricle section to rotate towards the atrium direction with the fixed point as the fulcrum.

The application provides an ablation catheter, which comprises a tube body, a handle, a bending adjustment section, a tube head, an energy transmission channel and an ultrasonic detection device. The ultrasonic detection device is arranged at the intersection of the end surface of the tube head and the side surface of the tube head. The ablation catheter has the advantages of large detection range, convenient operation and compact structure, and can detect the atrial wall thickness and ablation depth of the area in front of the catheter end surface and above the catheter side surface.

The invention relates to an implant for improving coaptation of an atrioventricular valve in a heart, the atrioventricular valve having a native first leaflet, a native second leaflet and optionally an annulus adjacent a wall of an atrium of the heart, the implant comprising a support structure configured to be arranged on and fixed to the annulus or to at least one of the first and second native leaflets, the implant further comprising retention means fixed to the support structure so as to prevent prolapse of the at least one native leaflet, whereby the support structure comprises a resting element that is configured to rest against the wall of the atrium adjacent the valve.

An implant (1) for improving coaptation of an atrioventricular valve in a human heart, comprising a frame that comprises a lower frame section (2) that supports an artificial leaflet (4), the artificial leaflet (4) being arranged and configured to cover the first native leaflet and forms a coaptation plane with a free edge for coaptation with the second native leaflet, wherein the lower frame section (2) comprises or forms at least one central clasp (5) for attaching the lower frame section (2) to the first native leaflet, the frame further comprising an upper frame section (3) that supports a flexible sealing skirt (6) made of a two-dimensional element curved to rest against the atrial wall along the posterior annulus section, wherein the upper frame section (3) is made of a resilient material so that free end regions (7) of the upper frame section (3) are capable of being resiliently braced against the atrial wall and / or against the posterior annulus section.

An implantable shunting device configured to shunt blood from the left atrium of the heart to the azygous vein through an aperture in the atrial septal wall is provided. The device comprises a flexible tube configured for radial adjustment between a contracted delivery configuration suitable for delivery in a delivery catheter and a deployed radially expanded configuration, the tube having a through lumen, a distal end configured to anchor within the azygous vein, and a proximal end configured to span an aperture in an atrial septal wall and anchor to the wall to provide fluid communication between the left atrium and the azygous vein. Methods of treating heart disease by implanting a shunting device of the invention are also disclosed.