32 results about "Bicuspid valve" patented technology

The invention relates to methods and devices for plicating the tricuspid valve leaflets to bicuspidize the valve.

Percutaneous apparatus for forming a bicuspid venous valve from autologous tissue are disclosed. A multilumen catheter is disclosed that includes a delivery shaft positioned on either side of the balloon. When the balloon is inflated within the vein at a treatment location where a bicuspid valve is to be created, the delivery shafts are pressed into the wall of the vein by the inflated balloon so that exit ports in the delivery shafts are at diametrically opposed locations. The delivery shafts may than be used to deliver puncture elements through the exit ports and into the vessel wall to gain access to a subintimal layer of the vein wall. In this manner, the inventive multilumen catheter aids in making properly positioned flaps of venous tissue for creating a bicuspid venous valve from autologous tissue.

An atrioventricular valve stent for puncture placement and a conveying system thereof relate to the prosthesis capable of being placed in human body, and especially relate to a atrioventricular valve stent and a placement operation apparatus thereof; the atrioventricular valve stent comprises an expansible outer support, a valve and a plurality of fixed arms; an inverted hook portion of the fixed arm and the fixed arm can form a seesaw lever; a draw line pulls the inverted portion to drive the fixed arm to expand, thus hooking a bicuspid valve leaflet, and fixing the valve stent on an atrioventricular valve; an inter-valve anti-backflow edge corresponding to the valve leaflet boundary can seal the boundary slit so as to prevent valve peripheral backflow; the conveying system comprises an outer sheath canal, a core and a push rod, wherein the core head is connected with the head sheath canal; the valve stent front end is compressed in the head sheath canal, and the rear end is compressed in the outer sheath canal; the push rod can push the valve stent outside the outer sheath canal in a multi-stage section mode, and release the stent; the draw line connected with the valve stent is matched with the inter-valve anti-backflow edge; the valve stent is easy to place in, adjust and retrieve, convenient and safe in operation, high in succeed rate, and can effectively prevent valve peripheral leakage.

The invention relates to a heart bicuspid valve linkcomputer assistance reconstruction method of computer application technology area, first uses man-machine interactive way select bicuspid valve link characteristic point, next when reorganized above bicuspid valve link characteristic point, uses the triaxiality ordering method, forms a sealed ordering triaxiality lattice sequence, finally based on this, uses the non-uniform three B spline curve achieve reconstruct of the bicuspid valve link structure. This invention beneficial effect is: (1) based on the man-machine interactive way direct select spot on bicuspid valve link, compare to use the algorithm division, can enhance point accuracy of selecting cingulum characteristic; (2) uses the non-uniform three B spline curve reconstruct triaxiality bicuspid valve linkstructure, because NURBS may maintain independence of the edge characteristic, and not easily influent by other control points, therefore can accurately display the bicuspid valve link such triaxiality complex structure.

Systems and methods for creating autologous monocuspid and bicuspid valves can include a catheter having a single expandable element or a double expandable element. Once the leaflets of the valve are created, various techniques can be used to fix the leaflets to the vessel wall or to each other, including clips, tissue anchors, adhesives, and heat.

The invention discloses an in-vitro performance testing system and testing method of a transcatheter bicuspid valve valved stent, and relates to prostheses capable of being implanted in vivo, in particular to a testing device and testing method applied to heart valve performance testing. The in-vitro performance testing system comprises a valve testing part which is internally provided with the bicuspid valve valved stent, a liquid circulation device and a monitoring device; a first testing part is a heart specimen of which the left ventricular apex is provided with a circulation inlet, and asecond testing part is a section of artificial blood vessel or a section of blood vessel specimen for sewing the tested bicuspid valve valved stent; the liquid testing device is connected with the first testing part to constitute a first testing circulating path for steady flow circulation and a second testing circulating path for simulating the ventricular beat of the human body; the liquid circulation device is connected with the second testing part to constitute a third testing circulating path which is connected with circulation lateral branches, in vitro tests of fluid mechanic performance, support fixing states, valve backflow, perivalvular leakage, and influences on surrounding important organization structures of the bicuspid valve valved stent can be achieved, and a durability experiment of the bicuspid valve valved stent is completed.

A prosthetic aortic conduit (1) for use during surgery on the aorta of a patient. The conduit includes an elongate tubular portion (10) extending along a longitudinal axis (11) between a first conduit terminal end (12) and a second conduit terminal end (13). The first conduit terminal end (12) is configured with two substantially U-shaped tongues (21, 22) extending away from the tubular portion (10) generally along the longitudinal axis (11). Each of the tongues (21, 22) is appropriately sized to together collectively approximate the shape of the scalloped bicuspid valve annulus. The second conduit terminal end (13) is configured with three substantially U-shaped tongues (31, 32, 33) extending away from the tubular portion (10) generally along the longitudinal axis (11). Each of the tongues (31, 32, 33) is appropriately sized to together collectively approximate the shape of the scalloped tricuspid valve annulus.

The invention is a device, system, and method for repairing heart valve function, which may include bisecting native valve leaflets for improved deployment of a prosthetic heart valve in the native valve annulus. The invention may include a catheter having a cutting element shaft with a cutting element configured to puncture a valve leaflet and / or make a controlled cut through the leaflet. The device may have an extendable foot configured to be positioned on an opposite side of the valve leaflet from the cutting element shaft. The device may include magnets to guide the cutting element and / or cutting element shaft in proper alignment with the extendable foot and to hold the elements in place during leaflet bisection.

The invention relates to an adjustable bicuspid valve forming device. The adjustable bicuspid valve forming device comprises an annulus body, a right metal wire and a left metal wire. After a flexible pipe is bent, two ends of the flexible pipe are connected to form the annulus body. The connecting position of the annulus body is divided into a right end and a left end. Two holes are formed in the middle of the annulus body and connected with a left catheter and a right catheter respectively. One end of the left metal wire is fixed on the inner side of the left end, and the other end of the left metal wire penetrates through the connecting position of the two ends of the annulus body to penetrate into the right end and penetrate out from the right catheter. One end of the right metal wire is fixed on the inner side of the right end, and the other end of the right metal wire penetrates through the connecting position of the two ends of the annulus body to penetrate into the left end and penetrate out from the left catheter. The left end is sleeved into the right end or the right end is sleeved into the left end. Inverted hook-shaped teeth are arranged on an opposite surface of the connecting position of the left end and the right end. According to the adjustable bicuspid valve forming device, secondary thoracotomy does not need to be conducted, an annular inner diameter is adjusted through an adjusting handle so that a prospective result can be obtained, pain of mind and body and economical burden of a patient can be relieved, and complication of the secondary operation can be avoided, and the mortality rate of the secondary operation can be reduced.

The invention discloses an artificial tendon intervention apparatus comprising a head, a connecting tube and a control lever. An artificial tendon is connected with the head. The head is composed of a concave part and a convex part fastened together. The control lever allows the head to be opened or closed or released through a connecting rod. The head and the connecting tube partially enter the left ventricle through the cardiac apex and arrive at the proper position of the bicuspid valve; by regulating the control lever, the head is opened, closed or released; the head is connected with the artificial tendon; by adjusting the length of the artificial tendon, intervention of the artificial tendon is achieved. The artificial tendon intervention apparatus is simple in design and efficient and simple to operate, allows shorter surgical time, is good in repeatability and has promising clinical application prospect.

The invention belongs to the human body heart repairing technology and medical instrument field, and discloses a strut type bicuspid valve airbag closing plate obstruction body implanted through the cardiac apex, and an implantation method thereof; an airbag is arranged in the airbag closing plate; before implantation, a strut, a support framework and the airbag are compressed in a puncture conduit, and implanted along with the puncture conduit; after implantation, the airbag closing plate is inflated by air or fluid through an infusion tube, and is expanded to take position between two leaves of the heart bicuspid valve, thus obstructing a bicuspid valve countercurrent flow channel formed by pathology, and curing the bicuspid valve countercurrent flow; the airbag closing plate obstruction body is simple in structure, strong in reliability, very low in residual countercurrent flow incidence rate, and the implantation method has less wound on human body; the airbag closing plate obstruction body can treat functional bicuspid valve incomplete closure diseases, and the functional bicuspid valve countercurrent flow restoration success rate can be above 90%.

The invention discloses a bicuspid valve clip. The bicuspid valve clip includes two first sheet members, two second sheet members, and a central portion; one end of two ends of each first sheet memberis connected to the central portion; one end of two ends of each second sheet member is connected to the central portion; the two first sheet members can be opened and closed with respect to the central portion at the same time; the two second sheet members can be opened and closed with respect to the central portion at the same time; and when the two first sheet members and the two second sheetmembers are opened at the same time, the two first sheet members are position on the same direction of the two second sheet members, and the first sheet members and the second sheet members can form aclamping structure. The bicuspid valve clip can enter a heart through a catheter, can achieve a clamping structure between the first sheet members and the second sheet members, can clamp a bicuspid valve which cannot be closed normally, and can prevent mitral regurgitation.

The invention relates to a mitral-valve popular type bilobed artificial heart valve, which comprises a support cage, two leaflets, and a sewing ring. The two leaflets are articulated in the support cage; the sewing ring is provided with an inner ring and sewing flange protruding outwards; the inner ring of the sewing ring is connected with the upper part of the support cage; the sewing flange is positioned in the middle part of the support cage; the lower part of the support cage is exposed. The heart valve uses only one specification to replace the existing four specifications that are 25M, 27M, 29M, and 31M, solves the mutually inconsistent problems that small installation dimension is matched with a big aperture, and is applied to all patients.

A prosthetic aortic conduit (1) for use during surgery on the aorta of a patient. The conduit includes an elongate tubular portion (10) extending along a longitudinal axis (11) between a first conduit terminal end (12) and a second conduit terminal end (13). The first conduit terminal end (12) is configured with two substantially U-shaped tongues (21, 22) extending away from the tubular portion (10) generally along the longitudinal axis (11). Each of the tongues (21, 22) is appropriately sized to together collectively approximate the shape of the scalloped bicuspid valve annulus. The second conduit terminal end (13) is configured with three substantially U-shaped tongues (31, 32, 33) extending away from the tubular portion (10) generally along the longitudinal axis (11). Each of the tongues (31, 32, 33) is appropriately sized to together collectively approximate the shape of the scalloped tricuspid valve annulus.

The invention relates to methods and devices for plicating the tricuspid valve leaflets to bicuspidize the valve.

A single circular convex magnet leaflet prosthetic heart valve with an opposing upper and lower magnetic field mounted into a C-clamp, with a modulating sensory unit within the top housing frame comprising; 1) a single, disc-shaped magnetic leaflet that opens and closes against an opposing magnetic main housing frame, designed to reduce friction in order to avoid hemolysis and coagulation. 2) an attached sensory unit that communicates from the heart to the brain through the braingate and microprocessor, compensating for the native defective heart valve. These sensors are regulated through brain guidance that might be induced by the sympathetic or parasympathetic system assisting with the vagus nerve to help tranquilize blood flow. This can replace the tricuspid or bicuspid valve. 3) a C-clamp used to prevent installation errors. Once the C-clamp is installed, un-installing and re-installing the entire unit will be unnecessary, thus, expediting the process, which could be lifesaving.U.S. Pat. No. 4,661,106Apr. 28, 1987MollU.S. Pat. No. 3,824,629July 1974ShileyU.S. Pat. No. 6,228,112 B1May 08, 2001Klootz et. Al.US 2019 / 0314150 A1Oct. 17, 2019ForsellU.S. Pat. No. 6,007,577Dec. 28, 1999VanneyU.S. Pat. No. 5,215,088Jun. 01, 1993Normann et at.US 2013 / 0046148 A1Feb. 21, 2013Tathireddy et al.US 2019 / 0083800 A1Mar. 21, 2019Yang et at.US 2018 / 0117324 A1May 03, 2018Schilling et al.U.S. Pat. No. 6,045,576Apr. 04, 2000Starr et al.US 2018 / 0154154 A1Jun. 07, 2018Sheldon et al.

An atrial septal defect plugging device comprises a left atrium surface umbrella disk, a waist part and a right atrium surface umbrella disk; the waist part of the plugging device is placed in the atrial septal defect; the left side umbrella disk and the right side umbrella disk clamp the atrial septum to help to maintain the plugging device stable. The edge of the left side umbrella disk of the plugging device is petal-shaped, and the petal gap faces towards the bicuspid valve while the stability of the plugging device is maintained, so that plugging failure caused by the fact that the bicuspid valve is pressed by the traditional plugging device. According to the petal shape design, the use amount of silk for weaving the plugging device can be reduced, so that the volume of the plugging device is reduced, fewer conveying sheathing canals can be used, and blood vessel complications are reduced. The plugging device provided by the invention changes the structure of the left side plugging umbrella of the traditional plugging device by aiming at the condition that the atrial septal defect is close to the bicuspid valve so as to prevent the plugging device from oppressing the valve leaflet of the bicuspid valve.

Provided is an artificial on-ring mechanical valve for replacing a bicuspid valve membrane. The artificial on-ring mechanical valve is used for being implanted into the heart to replace the cardiac bicuspid valve membrane which is positioned on the junction of the left atrium and the left ventriculus and has a lesion. The artificial on-ring mechanical valve includes a valve stent, a pair of openable valve leaflets and a suturing ring, wherein the valve stent includes a tubular part matched with a bicuspid valve ring in the left ventriculus, the valve leaflets are installed on the valve stent,contained in the tubular part and used for controlling one-way circulation of blood, and the suturing ring is fixed to the tubular part and used for being sutured with the bicuspid valve ring. The tubular part is also provided with an inflow end opening part and an outflow end opening part for blood to flow from the left atrium into the left ventriculus, one end of the tubular suturing ring is connected to the outflow end opening part, the other end of the suturing ring stretches out and serves as a protrusive end, and the suturing ring can be deformed when an external force is performed on the suturing ring.

The invention discloses a bicuspid bioprosthetic valve. The bicuspid bioprosthetic valve is equipped with a backing ring, a membrane A and a membrane B. The bicuspid bioprosthetic valve is also equipped with a positioning sheet, a hanging sheet of the membrane A and a hanging sheet of the membrane B. The backing ring is quasi-circular-shaped. The membrane A and the membrane B are respectively provided with membrane tips and equipped with the hanging sheet of the membrane A and a hanging sheet of the membrane B. The membrane tips of the membrane A and the membrane B are overlapped and fixed atone end of the backing ring through a fixing line. The hanging sheet of the membrane A and the hanging sheet of the membrane B are folded with the positioning sheet. The positioning sheet is tied andfixed at the other end of the backing ring through the positioning sheet such that the bicuspid bioprosthetic valve form a circular-arc opening of the membrane A, a membrane B, a joint between the hanging sheet of the membrane A and the hanging sheet of the membrane B and a membrane joint between the membrane A and the membrane B. The bicuspid bioprosthetic valve is reasonable in design, simple inmanufacture and suitable in placement condition. Joints between a valve ring and bicuspid valve membranes are opened and closed simultaneously in order to provide the maximum area of a bicuspid valveorifice. Therefore, occurrences of blood events are greatly reduced. Meanwhile, noise of the bicuspid valve is reduced such that myocardium diastole and contraction are more suitable for the physiological state. The valve is easy to promote and use.

The invention discloses a transthoracic bicuspid valve balloon dilatation catheter assembly and a technology thereof. The assembly comprises a balloon catheter and a guiding bougie. One end of the balloon catheter is a handle, and the other end of the balloon catheter is a balloon. The handle is in a Y shape, and the handle comprises a guide wire cavity and a filling cavity; the far end of the outer catheter is connected with the near end of the balloon, an inner catheter transversely penetrates through the balloon, and a tip end is formed at the far end of the balloon; the balloon is a cylinder, and the connection of the balloon and the outer catheter has a gradient, and two developing rings are fixedly installed inside the inner catheter inside the balloon; a heat shrink tube is arrangedbetween the handle and the catheter as transition; the guiding bougie is formed by connecting the control handle and the control guide wire. The balloon dilatation catheter assembly can complete biscupid valve narrow separation technology, the transthoracic intervention path is short, operation is easy, the balloon catheter is made of nylon materials, the explosion pressure is large, the safety is higher, meanwhile, no excessive fitting operation is needed, and various complications are reduced.

Various methods and systems are provided for bicuspid valve detection with ultrasound imaging. In one embodiment, a method comprises acquiring ultrasound video of a heart over at least one cardiac cycle, identifying frames in the ultrasound video corresponding to at least one cardiac phase, and classifying a cardiac structure in the identified frames as a bicuspid valve or a tricuspid valve. A generative model such as a variational autoencoder trained on ultrasound image frames at the at least one cardiac phase may be used to classify the cardiac structure. In this way, relatively rare occurrences of bicuspid aortic valves may be automatically detected during regular cardiac ultrasound screenings.

The invention discloses an artificial blood pump in vitro simulated circulation system, comprising a test bench and a left ventricle simulator, an aorta simulator, a vein simulator, a left atrium simulator and an artificial blood pump assembled in the test bench; The device includes a closed cavity with adjustable volume; the left ventricle simulator, the aorta simulator, the vein simulator, and the left atrium simulator are connected in sequence through pipelines, and connected end to end to form a simulated cycle; the left ventricle simulator is connected to the pipeline of the aorta simulator An aortic valve simulator is installed, and a mitral valve simulator is installed on the pipeline from the left atrium simulator to the left ventricle simulator to realize the one-way flow of liquid in the simulated circulation; the input port of the artificial blood pump is equipped with a three-way valve, and the three-way valve The two input ends of the valve are respectively connected with the left ventricle simulator and the left atrium simulator, and the output port is connected with the aorta simulator, and the liquid is pumped from the left ventricle simulator or the left atrium simulator into the aorta simulator. The volume of the left ventricle simulator can be adjusted to simulate the changes of ventricular volume and pressure.

The invention discloses a bicuspid bioprosthetic valve. The bicuspid bioprosthetic valve is equipped with a backing ring, a membrane A and a membrane B. The bicuspid bioprosthetic valve is also equipped with a positioning sheet, a hanging sheet of the membrane A and a hanging sheet of the membrane B. The backing ring is quasi-circular-shaped. The membrane A and the membrane B are respectively provided with membrane tips and equipped with the hanging sheet of the membrane A and a hanging sheet of the membrane B. The membrane tips of the membrane A and the membrane B are overlapped and fixed atone end of the backing ring through a fixing line. The hanging sheet of the membrane A and the hanging sheet of the membrane B are folded with the positioning sheet. The positioning sheet is tied andfixed at the other end of the backing ring through the positioning sheet such that the bicuspid bioprosthetic valve form a circular-arc opening of the membrane A, a membrane B, a joint between the hanging sheet of the membrane A and the hanging sheet of the membrane B and a membrane joint between the membrane A and the membrane B. The bicuspid bioprosthetic valve is reasonable in design, simple inmanufacture and suitable in placement condition. Joints between a valve ring and bicuspid valve membranes are opened and closed simultaneously in order to provide the maximum area of a bicuspid valveorifice. Therefore, occurrences of blood events are greatly reduced. Meanwhile, noise of the bicuspid valve is reduced such that myocardium diastole and contraction are more suitable for the physiological state. The valve is easy to promote and use.

The invention is a device, system, and method for repairing heart valve function, which may include bisecting native valve leaflets for improved deployment of a prosthetic heart valve in the native valve annulus. The invention may include a catheter having a cutting element shaft with a cutting element configured to puncture a valve leaflet and / or make a controlled cut through the leaflet. The device may have an extendable foot configured to be positioned on an opposite side of the valve leaflet from the cutting element shaft. The device may include magnets to guide the cutting element and / or cutting element shaft in proper alignment with the extendable foot and to hold the elements in place during leaflet bisection.