1640 results about "Prosthetic graft" patented technology

Set forth are vascular valves and servovalves and methods of using the same that may be positioned in the circulatory system without interrupting blood flow to facilitate solid organ transplantation so as to reduce graft organ anoxia and degradation before and after harvesting and storage, thereby minimizing late-term cardiac allograft vasculopathy as a major cause of graft failure. Along the urinary tract, bypassing bladder-generated urge sensation by diverting urine directly from the ureters to a neobladder or collection bag alleviates intractable incontinence, nocturia, urethral syndrome, overactive bladder, dysuria, or frequency. Where the lower tract is missing, a prosthesis can thwart disease and preclude the degenerative metaplastic transition to carcinoma risked when gut is used to construct a conduit for urine, a neobladder, and / or high-maintenance stoma. Druglines to valves and servovalves can directly pipeline-target medication to nidi, anastomoses, or any other trouble spots.

The invention belongs to the technical field of medical implant prostheses, and particularly relates to a self-stability cervical interbody fusion cage which comprises a fixing plate and a fusion cage body. An adjusting rod is mounted in the fusion cage main body, a mounting groove is formed in the fusion cage main body, the adjusting rod and a sliding block are mounted in the mounting groove, a check block is mounted on the adjusting rod, and the check block drives the sliding block to move; an adjusting groove is formed in the fusion cage body, a connecting plate and a protruding tooth rod are installed in the adjusting groove, a contact plate is installed on the connecting plate, and a top block and a sliding block are connected through a pull rope; when the interbody fusion cage is implanted, the protruding toothed rod retracts, the surface of the protruding toothed rod is kept flat and smooth, implantation of the interbody fusion cage is facilitated, extrusion, friction and scratching are avoided, then after implantation, the protruding toothed rod stretches out, friction force between the interbody fusion cage and the vertebral body end plate is increased, and it is guaranteed that the fixing effect and stability of the interbody fusion cage are good; the treatment effect is improved.

The disclosure relates to heart have prostheses with the reduced need of pacemaker implantation and improved means for positioning the replacement heart valve. In one aspect of the present disclosure, the stent scaffold of the valve prosthesis includes axially extending locators. The locators may be positioned within the cusp of the native aortic valve. Placement of the locators within the cusps may prevent further proximal movement of the stent scaffold into the left ventricle. By adjusting the location of the proximal end of the locators with respect to the proximal end of the stent scaffold, infra-annular placement of the stent scaffold in the aortic annulus may be assured. In another aspect, means for visualizing the positioning of replacement heart valves at an implant site inside an individual's body is disclosed.

The invention belongs to the technical field of artificial prosthesis materials, and particularly relates to a medical implant with a lithium disilicate coating and a preparation method thereof, and the preparation method comprises the following steps: (1) placing a prefabricated matrix in a high-temperature environment for staged sintering, and then carrying out surface polishing, cleaning and drying treatment; (2) mixing lithium ethoxide and tetraethoxysilane at room temperature, and reacting for 2-4 hours while stirring to obtain lithium disilicate sol; the preparation method comprises the following steps: preparing a prefabricated substrate, soaking the prefabricated substrate in lithium disilicate sol for 3-7 minutes, performing sol permeation for 3-10 minutes under the negative pressure of more than 30 mm Hg, adding an ethanol water solution to initiate gelation reaction, taking out the prefabricated substrate after the reaction is completed, drying and sintering to obtain the medical implant with the lithium disilicate coating. According to the method, the uniform and continuous lithium disilicate coating which is not easy to fall off can be formed on the surface of the prefabricated matrix of the implant, so that the surface performance of the implant is improved, and the osteogenesis promoting performance and the angiogenesis promoting performance of the implant are optimized.

A prosthetic valve includes a frame with inflow and outflow ends and a longitudinal axis extending therebetween. The frame is in a radially expanded state defining a radially expanded diameter and is configured to define a partially radially compressed diameter when the frame is in a partially radially compressed state. A sealing skirt coupled to the frame includes inflow and outflow end portions, an inelastic skirt portion with weft and warp threads, and a tensioning element extending circumferentially along the outflow end portion. The sealing skirt includes a terminal outflow edge configured to define a skirt diameter greater or equal to the partially radially compressed diameter and less than the radially expanded diameter when the sealing skirt is in a relaxed state. The weft and warp threads are configured to be oriented at an approximately 45-degree angle to the longitudinal axis when the sealing skirt is in the relaxed state.

Medical appliances may be formed of multilayered constructs. The layers of the constructs may be configured with various physical properties or characteristics. The disposition and arrangement of each layer may be configured to create an overall construct with a combination of the individual properties of the layers. Constructs may be used to create vascular prostheses or other medical devices.

An orthopaedic knee prosthesis includes a tibial bearing component with articular features which operate to protect adjacent soft tissues of the natural knee, promote and / or accommodate desired articulation with an abutting femoral component, and facilitate expedient and effective implantation by a surgeon.

The present invention discloses a prosthetic heart valve comprising at least two valve components, a sealant covering the valve components, and an edge-sealing structure. A space is formed between the valve components covered with the sealant. The edge-sealing structure has a closed end face and connects the ends of the sealant to form a closed space within the space. The prosthetic heart valve provided by the present invention can reduce the risk of thrombosis between the valve components. Because the edge-sealing structure is flexible, it has little effect on the compression and gripping of the prosthetic valve, and the addition of the edge-sealing structure does not affect the normal function of the prosthetic valve.

The present application relates to the field of medical devices, and specifically to a repair device for preventing valve regurgitation, comprising a mounting bracket, a single anti-reflux prosthesis for replacing the function of a single native valve leaflet, and a fixing member, wherein one end of the single anti-reflux prosthesis is fixed on the mounting bracket, and an atrial segment is provided at the distal end of the mounting bracket, and the atrial segment is configured to adapt to the morphology of the native valve ring tissue, and the atrial segment includes a leak-proof portion, and the proximal end portion of the mounting bracket is anchored in the ventricle by the fixing member, wherein, after the mounting bracket is installed in place, the leak-proof portion abuts against or fits the native valve ring tissue, and when the native valve opens and closes so that the morphology of the native valve ring changes, the leak-proof portion follows the morphological change of the native valve ring and produces adaptive deformation, so that the leak-proof portion always abuts against or fits the native valve ring tissue.

A prosthetic heart valves including an annular frame and one or more detachable outer skirts and methods associated therewith are disclosed. The frame includes a plurality of interconnected struts and one or more outer skirts releasably attached to an exterior surface of the frame. In some examples, an outer skirt is attached to the frame via at least one retaining suture formed by a plurality of stitches looped around a pull suture. Removal of the pull suture from the suture line enables the outer skirt and frame to separate as the stitches are pulled through openings in the outer skirt and remain attached to the frame. Removability of the outer skirt can facilitate improvements in implant and explant procedures of the prosthetic valves, such as, for example, valve-in-valve procedures.

The invention relates to an anchor hook and methods of using the same for subannular anchoring of a transcatheter heart valve replacement, and in particular for an orthogonally delivered (side-delivered) transcatheter prosthetic heart valve having a annular support frame having compressible wire cells that facilitate rolling and folding the valve length-wise, or orthogonally to the central axis of the flow control component, allowing a very large diameter valve to be delivered and deployed to the mitral or tricuspid valve from the inferior vena cava or superior vena cava, or trans-septally to the mitral valve, the valve having a height of about 5-60 mm and a diameter of about 25-80 mm, without requiring an oversized diameter catheter and without requiring a delivery catheter to bend 90 degrees during deployment.

An implantable prosthetic device can include a radially expandable and compressible annular frame comprising an inflow end portion and an outflow end portion, and a plurality of leaflets arranged within the frame. Each leaflet can include one or more commissure tabs. The commissure tabs of two adjacent leaflets coupled to a commissure attachment member to form a commissure. The commissure can be secured to the frame via first and second sutures, each suture extending through a respective commissure tab, through the commissure attachment member, crossing over the other suture and being secured to the frame. The commissure can define a bending axis disposed radially inwardly of the frame such that a main body of each leaflet is prevented from contacting the frame when the valvular structure is in an open configuration.

An apparatus, system, and method may be used to replace a natural or artificial articular surface of a joint, and to repair a bone that is associated with the joint. In some embodiments, the apparatus, system, and method may include a joint replacement prosthesis with a prosthetic articular surface, a support structure securable to the bone, and a first attachment interface. The system may also include a bone plate with a bone engagement surface securable to the bone on either side of a fracture formed in the bone, or a damaged area of the bone. The bone plate may include a second attachment interface that is attachable to the first attachment interface of the joint replacement prosthesis in order to couple the bone plate to the joint replacement prosthesis.

The invention relates to the technical field of medical instruments, and discloses an angle-adjustable artificial hip joint prosthesis structure which comprises a thighbone connecting assembly, an acetabulum connecting assembly and a movable part movably connected between the thighbone connecting assembly and the acetabulum connecting assembly. The thighbone connecting assembly comprises a first connecting unit fixedly connected with the movable part, a thighbone stem detachably connected to the lower end of the first connecting unit, and a connecting screw fixedly connected to the upper end of the thighbone stem and in threaded connection with the first connecting unit. The acetabulum connecting assembly comprises a second connecting unit fixedly connected with the movable part and an acetabulum fixedly connected to the second connecting unit. Stable rotating connection is achieved through the double-shaft moving part, and a traditional easily-abraded spherical surface structure is replaced; the locking assembly is matched to realize personalized angle adjustment and locking; the femoral stem can be detached and replaced, and adaptability is improved; the surface composite coating promotes osseointegration and improves biocompatibility, the overall structure stability is high, adaptability is high, and postoperative recovery is fast.

An adaptor for a dental implant abutment includes a body extending along a longitudinal axis between a proximal end and a distal end. The body has a longitudinally extending bore extending from the proximal end for sliding receipt of a post of a dental implant abutment. The body has a distal shaft for inserting into a dental prosthetic, and the distal shaft tapers in outer diameter going towards the distal end. The body has proximal flange for securing between the dental prosthetic and the dental implant abutment. The proximal flange has a first ledge for abutting the dental implant abutment and a second ledge for abutting the dental prosthetic, and the second ledge tapers in outer diameter going towards the distal end.

Devices and methods for providing a pathway for fluid to flow around a main lumen of a guide catheter are disclosed. As one example, a delivery apparatus can include a handle including an outer housing and a flush port coupled to the outer housing, a shaft extending distally from the handle, and a main lumen extending axially through the shaft, where the main lumen is fluidly coupled to the flush port via a flush lumen extending between the flush port and the main lumen. The delivery apparatus can further include at least one axially extending channel fluidly coupled to and radially offset from the main lumen, the channel extending between a first location that is adjacent to the flush lumen and a second location that is adjacent to a distal end of the shaft.

Prosthetic heart valve leaflets of shapes that control bending. Prosthetic heart valves can include a leaflet frame having a generally tubular shape with attached film. The leaflet frame can define a plurality of leaflet windows with the film defining at least one leaflet extending from each of the leaflet windows. Each leaflet attachment zone on the leaflet frame may have substantially the shape of an isosceles trapezoid having two leaflet sides, a leaflet base and a leaflet free edge opposite the leaflet base. The two leaflet sides can diverge from the leaflet base, the leaflet base being substantially flat.

A funnel crimper includes a body having a tapered portion, an extended outflow portion, and a tissue compressor. The tissue compressor is configured to apply a radially inward force to tissue of a prosthetic valve of a transcatheter heart valve prosthesis disposed on an inner surface of a frame of the transcatheter heart valve prosthesis as the transcatheter heart valve prosthesis is advanced through a lumen of the funnel crimper. The tissue compressor may be a ring of relatively soft material extending into the lumen of the funnel crimper or pressurized fluid applied radially inward to the lumen of the funnel crimper.

The invention relates to the technical field of medical instrument artificial prostheses, in particular to a femoral stem prosthesis and a femoral stem prosthesis system. A femoral stem prosthesis comprises a femoral neck, a stem body connected with the femoral neck and a stem tail connected with the stem body in the direction away from the femoral neck, side grooves are formed in the peripheral faces, located on the two sides of the femoral neck, of the stem body, side wings are connected with the side grooves in a sliding mode, injection holes are formed in the ends of the side wings, and outflow holes are formed in the peripheral faces of the side wings. And the injection hole is communicated with the outflow hole. Triple fixation is achieved through the side wings, the back wings and the holes in the side wings; the handle body and the handle tail are fixed and selected in a split manner, so that the adaptability of the prosthesis for the osteoporosis patient is improved; the same operation file can be adopted for various handle types through one handle tail, and the operation efficiency is improved.

Embodiments of an implantable prosthetic valve are disclosed. The valve can have an annular frame having a plurality of frame members and a skirt assembly. The skirt assembly can include a laminate having a fabric layer sandwiched between a first covering member and a second covering member. At least one surface of the fabric layer can be exposed at one or more windows in the second covering member. The skirt assembly can be coupled to the annular frame by a suture extending through the fabric layer at the one or more windows and around at least one of the plurality of frame members. Methods for making such an implantable prosthetic valve are also disclosed.

The invention relates to a tibial plateau prosthesis. The tibial plateau prosthesis mainly comprises a tibial spacer, a tibial plateau and a sleeve. The tibia gasket is provided with a first fixing block and three arc-shaped holes, and movable second fixing blocks are arranged in the holes. The tibial plateau comprises a plateau support with open holes and a shell, and the open holes are formed in the side portion and the bottom of the shell. The screw penetrates through the gasket and the platform support to be inserted into the shell, and outer threads of the screw are meshed with inner threads of the sleeve. The sleeve moves upwards and extends out of the side hole of the shell through a hinged connecting rod system to penetrate into the medullary cavity to enhance fixation. A spring is arranged in the screw to drive the first pushing part and can be matched with the sleeve to prevent downward movement; and meanwhile, the second pushing part in the screw can extend into the medullary cavity from the bottom through threads. The design realizes multidirectional fixation and improves the stability of the prosthesis.

A method of diverting fluid flow from a first vessel including an occlusion to a second vessel includes deploying a prosthesis at least partially in a fistula and making valves in the second vessel incompetent. Making the valves in the second vessel incompetent includes at least one of using a reverse valvulotome to cut the valves, inflating a balloon, expanding a stent, and lining the second vessel with a stent.

An orthopaedic prosthesis for use in a hip replacement surgery includes an implantable stem component. The implantable stem component includes a core and a shell extending over the core. The shell includes a polymeric material and is configured to receive a femoral head component. Metal foam may extend over a portion of the shell.

A system for an anatomical total shoulder arthroplasty or reverse total shoulder arthroplasty can include an infinitely adjustable augment angle baseplate, an implant, a baseplate, an engagement member, and a prosthetic head. The infinitely adjustable augment angle baseplate can be configured to be secured to a first bone of a patient. The implant can be insertable into a second bone of a patient. The baseplate can be insertable into the implant and configured to be attached to the second bone of the patient. The engagement member can be couplable to either of the infinitely adjustable augment angle baseplate or the baseplate. The prosthetic head can be couplable to the other of the infinitely adjustable augment angle baseplate or the baseplate. The prosthetic head can be engageable with the engagement member to form a prosthetic joint between the first bone and the second bone.

Prosthetic heart valves and methods for assembling prosthetic heart valves are disclosed. As one example, a prosthetic heart valve includes a frame, commissure support elements, and leaflets, each leaflet comprising a body and opposing commissure tabs, each commissure tab folded over from a corresponding body to form a bend between the commissure tab and body and arranged adjacent to another folded commissure tab of an adjacent leaflet to form a pair of commissure tabs that is coupled to one commissure support element to form a commissure. Each commissure tab is secured to the commissure support element via a reinforcement member positioned against the commissure tab, adjacent to the bend, and secured to and / or at least partially wrapped around the commissure tab and the commissure support element, the reinforcement member comprising a flexible body and a more rigid, central portion, the central portion positioned along a height of the commissure tab.

Prosthetic devices allow for full articulation of the joint, while absorbing impact of the components during normal use that will reduce wear on the device components and prolong life. The device may include a bone implantable component and a bearing component having an articulation surface that is sized and shaped to substantially mate with at least a portion of the bone implantable component and a damping mechanism that includes a contact member disposed at least primarily inside a cavity; a biasing member biasing the contact member toward an upper aperture of the cavity and means for capturing the contact member within the cavity.

Disclosed are prosthesis systems and methods that provide ways by which the articulating surfaces of the implant can be exchanged such that the anatomic surfaces can be converted to reverse surfaces, while not exchanging the fixation components. Also disclosed herein are methods by which the surgeon can implant an inset anatomic articulating glenoid implant whereby at a later date, can remove the anatomic articulating surface and replace it with a reverse articulating surface such that the primary means of fixation remains well fixed in the glenoid fossa at the moment of articular exchange.

A device for inserting a pre-filled or silicone prosthesis into a surgical pocket is formed from a sleeve formed of a trapezoidal bottom layer and a trapezoidal top layer attached to the bottom layer along longitudinal edges of the bottom layer and top layer. The top layer has a greater width than the bottom layer so as to form a shape of half of a truncated cone or a tapered half cylinder when the sleeve is filled. The sleeve has a constantly decreasing cross-sectional area along a length of the sleeve. This device reduces the chances for the implant to rotate in an unintended manner due to the non-circular cross-section of the sleeve and prevents inadvertent exit of the implant prior to placement in the surgical pocket.

The present application relates to the field of medical devices, and specifically to an aortic valve auxiliary prosthesis for preventing regurgitation, comprising: a main body, which is configured to remain in place in the aorta at the surgical site; and three auxiliary leaflet segments configured to cooperate with the three free segments of the native leaflets of the aortic valve; the three auxiliary leaflet segments are fixed to the main body. The present invention allows the original native leaflets to be retained, and when the native valve is closed, the purpose of improving the prevention of regurgitation is achieved by overlapping and covering the free segments of the native valve, with significant therapeutic effects and stronger targeting. Since the native valve is retained, most of the impact force of blood when flowing is still on the native valve, the reliability requirements for the fixed positioning of the main body are low, and the morphological changes to the native valve are smaller.