11 results about "Arterial valve" patented technology

The invention discloses a balloon structure of a transcatheter aortic valve delivery system, and relates to the technical field of interventional cardiology and medical instruments. The balloon structure of the transcatheter aortic valve conveying system comprises a catheter seat, and one end of the catheter seat is fixedly sleeved with an outer tube connecting piece and an inner tube connecting piece. According to the balloon structure of the transcatheter aortic valve delivery system, the tip connecting piece adopts the stepped design of accumulation of a plurality of circular rings or valve circular rings formed by injection molding of nylon materials, so that the effects of reducing the size of the connecting piece and reserving a larger gap are achieved, and the balloon filling effect is facilitated; the tip connecting piece makes contact with the inner wall of the blood vessel in the process of penetrating into the blood vessel of the human body, the flexible contact effect of the tip connecting piece and the inner wall of the blood vessel is achieved, the purpose of improving the use safety of the balloon structure is achieved, the flexible positioning effect is achieved after the tip connecting piece penetrates into the target position, and the effect of improving the implantation stability of the balloon structure is achieved.

The present invention relates to the field of medical imaging and in particular to a system (10) for processing medical image data for generating an image comprising a simultaneous representation of an arterial, valvular and myocardial state, wherein the system is adapted to perform the steps of: obtaining 3D medical image data (S101); identifying arterial, valvular and myocardial regions in the 3D medical image data by means of segmentation (S102); mapping the 3D medical image data to a 2D representation using a coordinate transform based on a spherical coordinate system with an origin depending on the identified valvular region and / or the identified arterial region (S104); generating a combined 2D image (50) indicative of the arterial-, valvular and myocardial state based on the 2D representation as an output (S104). The present invention further relates to a corresponding method (100),computer program and computer readable medium.

The invention provides a design method of an artificial aortic valve and the artificial aortic valve. The artificial aortic valve comprises a valve support and three valve leaflets. And the three valve leaflets are fixed on the valve bracket. The design method comprises the following steps: forming a shape curve of the valve stent, and generating the valve stent according to the shape curve of the valve stent. Based on the shape curve of the valve stent, a parameterization method of a power equation is adopted, and free boundary curves of the Tai Chi-like shape of the three valve leaflets are formed respectively. Based on the shape curve of the valve stent and the free boundary curve corresponding to the valve leaflets, abdomen curves of the three valve leaflets are respectively formed. And according to the shape curve of the valve stent, the free boundary curves of the three valve leaflets and the abdomen curves of the three valve leaflets, generating the three valve leaflets in a closed state. The obtained artificial aortic valve is better in performance.

The invention relates to the technical application field of transcatheter artificial heart valves, and discloses a transcatheter aortic valve integrated skirt which comprises a valve support, an inner skirt edge is arranged on the inner side of the valve support, an outer skirt edge is arranged on the outer side of the valve support, and the inner skirt edge and the outer skirt edge are manufactured through an integrated forming process. A plurality of protruding supporting bosses are arranged on the side, away from the outer skirt edge, of the inner skirt edge, a plurality of leakage-proof assemblies are arranged on the side, away from the inner skirt edge, of the outer skirt edge, and a plurality of fixing assemblies are arranged on the inner side and the outer side of the valve support. The integrated inner skirt edge and outer skirt edge are free of suture lines, the hidden danger of perivalvular leakage caused by suture gaps is fundamentally eliminated, skirt edge dislocation caused by manual operation errors is avoided, meanwhile, bulb-shaped hollowed-out grooves formed by the adjacent leakage-proof bosses form pocket-shaped spaces, trace blood breaking through attachment gaps can be actively intercepted, and the leakage-proof effect is achieved. And the use safety of the artificial valve is improved.

The invention discloses a transcatheter aortic valve conveying system bending adjusting mechanism, and relates to the technical field of interventional cardiology and medical instruments. The bending adjusting mechanism of the transcatheter aortic valve conveying system comprises a catheter base and a catheter body, and the catheter body is fixed to one end of the catheter base; the guide pipe further comprises a bending adjusting driving assembly, the guide pipe body penetrates through the bending adjusting driving assembly, a first sliding block or a second sliding block, a winding boss, a steel core and a pull wire are arranged in the bending adjusting driving assembly, the winding boss is fixed to one side of the first sliding block or one side of the second sliding block, and a through hole is formed in one side of the first sliding block or one side of the second sliding block. According to the bending adjusting mechanism of the transcatheter aortic valve conveying system, the first rotary knob or the second rotary knob is manually rotated to rotate, power transmission is achieved only by reserving cooperation of a single set of threads, a transmission link is simplified, the number of parts is reduced, the operation reliability of the mechanism is improved, meanwhile, the production and assembly difficulty and cost are remarkably reduced, and the production efficiency is improved. And compared with a traditional structure, the structure is more practical and economical.

The application relates to a manufacturing method of an aortic valve anchor, which comprises the following steps: cutting a base plate into an anchor semi-finished product in a planar unfolded state, and then cooperating with a shaping tool and heat treatment to axially stretch the anchor semi-finished product to form an anchor finished product in a three-dimensional state. The method omits the previous heat treatment step, reduces multiple shaping steps and heat treatment steps of a traditional shaping tool, directly stretches and shapes the final anchor, simplifies the process, avoids the instability caused by the traditional multiple heat treatment process and outward extension and shaping clamping, has small heat deformation, avoids the obstruction of the poor node formed at the bottom end of the positioning sinus of the anchor during implantation, improves the forming quality and use effect of the anchor, simultaneously reduces the manufacturing cost, and is favorable for improving the production efficiency.

The invention discloses an on-site installation type full endoluminal repair system for treating Stanford A-type dissection. The on-site installation type full endoluminal repair system comprises an ascending aorta stent-type blood vessel (ascending main assembly), a coronary artery branch covered stent-type blood vessel (coronary artery assembly) and a self-expanding aorta interventional valve (valve assembly) capable of being installed on site according to needs. The lifting main assembly is divided into a lifting main section and a sinus tube section, the lifting main section is a covered stent, the head end is anchored to an ascending aorta, the tail end is transited to be a concave sinus tube section, embedded branches are arranged at the two ends in a cavity of the covered stent in front of the concave part, openings are formed in the sinus tube section, and a metal bare stent is arranged outside the sinus tube section. The coronary artery branch covered stent is a conical small-caliber covered stent, the near end of the coronary artery branch covered stent is connected with an embedded branch of the lifting main assembly, and the caliber of the far end varies due to left and right coronary arteries. The graft may engage the aortic valve component as desired. The invention is specially used for treating the Stanford A-type dissection lesion of the aorta root, can repair the aortic lesion, reconstruct the bilateral coronary artery and connect the aortic valve as required, and can be produced in batches for emergency operations.

According to the pre-dilation balloon and the balloon dilation catheter assembly, the columnar balloon body is arranged in the middle of the pre-dilation balloon, the columnar balloon body is composed of the at least two balloon body units with the different outer diameters, the pre-dilation balloon can be arranged to be a reducing balloon, and therefore an anti-slipping step is formed in the middle of the pre-dilation balloon. In the pre-dilation process of the pre-dilation balloon, the anti-slip step is in contact with the calcified aortic valve, so that the friction force between the middle part of the pre-dilation balloon and the calcified aortic valve is increased, and the pre-dilation balloon is effectively prevented from shifting or slipping off from the calcified aortic valve in the pre-dilation process; the defect that the pre-expanded balloon is difficult to adapt to pre-expansion treatment of aortic valve calcification parts and lesion narrow parts due to the fact that the pre-expanded balloon is prone to displacement or slippage in the balloon pre-expansion link is overcome.

The invention relates to the field of medical instruments, and discloses a transcatheter aortic valve X-type valve leaflet valve frame and a connecting method thereof.The transcatheter aortic valve X-type valve leaflet valve frame comprises a first supporting frame, a second supporting frame and a valve leaflet structure, a plurality of X-type windows are formed between the first supporting frame and the second supporting frame, and the first supporting frame and the second supporting frame form an annular frame structure; the number of the valve leaflet structures is three, the valve leaflet structures are all arranged in the annular frame structure, a plurality of connecting structures are arranged at the joint of the first supporting frame and the second supporting frame and used for connecting and fixing the valve leaflet structures, and each connecting structure comprises a connecting block. By means of the arranged connecting lugs, stress isolation is achieved, the X-shaped suture structure is adopted, the connecting lugs are locked from multiple dimensions, complex stress from blood flow impact is effectively resisted and dispersed, the pain point that stress of a traditional valve suture point is concentrated, and valve leaflet tearing or fatigue failure is likely to be caused is solved, and the suture effect is improved. Therefore, the anti-fatigue performance and the long-term structural integrity of the valve are enhanced.

This invention relates to the field of medical device technology, and discloses an aortic valve stent and aortic valve assembly. The stent includes a stent body, which has a first mesh layer, a connecting rod layer, and a second mesh layer sequentially arranged from the inflow end to the outflow end. The first mesh layer is formed by multiple first mesh units with upper and lower double-layer V-shaped structures. The second mesh layer is formed by multiple V-shaped or inverted V-shaped second mesh units. The connecting rod layer includes multiple axial straight rods, with both ends of the straight rods connecting the first mesh layer and the second mesh layer respectively, and forming multiple large mesh openings between them to avoid the coronary artery opening. The outflow end of the stent has a suture ear fixing post, the top of which is flush with the end face of the outflow end and has a suture ear opening. This invention combines the coronary artery friendliness of a bulbar expansion stent with the excellent hemodynamic performance of a self-expanding stent, while reducing the grip size and shortening rate.

The present invention specifically relates to the technical field of medical model construction, and provides an aortic valve dynamic mathematical model and a parametrized modeling method. The solution comprises: determining three reference points on the basis of a plane in a three-dimensional coordinate system, and obtaining a bottom fixed point along the direction of the perpendicular bisector of a target line segment formed by two reference points; constructing an opening-closing motion curve, a belly edge curve, and an attachment edge curve on the basis of the three reference points and the fixed point; constructing a single valve leaflet by taking the opening-closing motion curve as a sweep path and taking the belly edge curve and the attachment edge curve as sweep curves; presetting a plurality of control points to regulate the opening-closing motion curve to obtain a dynamically deformable single valve leaflet; and repeating the steps to construct the aortic valve dynamic mathematical model composed of three dynamically deformable valve leaflets. In the solution, by adjusting the positions of reference points and parameters, the overall structure of valve leaflets is controlled, and the trajectory of an opening-closing motion curve is changed, thereby achieving dynamic deformation of valves during closing and opening.