16 results about "Aneurysm neck" patented technology

The invention relates to the technical field of control of intelligent implanted medical instruments, and discloses an aneurysm neck sealing system and a control method. Digital subtraction angiography is adopted to measure the neck diameter in multiple directions, an average value is calculated, the target neck sealing radius is set by combining the size of an embolism device, and it is ensured that instrument type selection is scientific and reasonable. The triggering temperature and recovery kinetics of the shape memory polymer are determined through a constant-temperature experiment, an actual expansion radius model is established, and quantitative control over the heating process is ensured. A heat balance model is established by using the heat capacity and cooling curve of the embolism device, and temperature rise and heating power expressions are deduced, so that fine regulation and control of temperature and power are realized. And natural cooling is performed after heating to a set terminal point, the plugging effect is evaluated in real time through iconography measurement, and compensation heating or model replacement is performed according to actual differences to ensure the plugging effect.

Occlusion devices are disclosed herein. According to some embodiments, the present technology includes a mesh configured to be positioned within an aneurysm cavity, the mesh having a low-profile configuration for delivery through a catheter to the aneurysm cavity and an expanded configuration for implantation in the aneurysm cavity. The mesh can include a first portion configured to be positioned over the aneurysm neck and a second portion configured to be positioned between the first portion and a dome of the aneurysm. The mesh can include a copper material at the second portion of the mesh, wherein the copper material is configured to promote thrombosis within the aneurysm cavity.

The application discloses a filter screen, a stent microcatheter system for embolism of intracranial ruptured aneurysm, and relates to the technical field of medical devices, which comprises a catheter body, a balloon and a supporting filter screen; the balloon and the supporting filter screen are arranged on the catheter body at intervals; the two ends of the supporting filter screen are respectively provided with a fixed ring and a moving ring; the fixed ring is sleeved on the catheter body and is fixedly connected with the catheter body; the moving ring is sleeved on the catheter body and is slidably connected with the catheter body; a traction rope is fixedly connected with the moving ring; the traction rope penetrates through the fixed ring and extends outward; a traction ring is fixedly connected with the extending end; and a positioning spring is arranged between the fixed ring and the moving ring. Through the arrangement, the application provides a novel microcatheter system which is reasonable in structure and convenient to adjust; the balloon and the supporting filter screen are arranged in zones, and the temporary blood vessel occlusion and the aneurysm neck protection blocking functions can be realized respectively.

This invention discloses a method for predicting stent deployment in cerebral aneurysms, comprising: acquiring vascular images containing cerebral aneurysms and extracting multiple vascular structures related to the aneurysm; encoding each vascular structure as a structural latent variable using a structural encoder; establishing edges based on the anatomical connections of each vascular structure using its structural latent variables as nodes to generate a structural interaction graph, and aggregating information from the structural interaction graph using a graph neural network to obtain global latent variables representing global topological relationships; extracting the geometric features of the aneurysm neck and fusing the aneurysm neck geometric features with the global latent variables; and processing the fused features using a predictive decoder to predict the location point sequence of the aneurysm stent deployment path. This embodiment improves the stability and accuracy of the prediction.

The present invention provides an aneurysm neck embolization member with flexibility in the neck region, and a method for manufacturing the aneurysm neck embolization member. [Solution] The device has a main body (collectively referred to as a body 52, neck 53, head 54, etc.) made of a tubular mesh material knitted by weft knitting to be flexible, and the main body includes a neck 53 that can fit into the neck of the aneurysm from the inside, and a body 52 knitted continuously with the neck 53 and inserted into the inside of the aneurysm, with the neck 53 interposed between one end in the axial direction and the other end of the neck 53, and the other end of the neck facing the neck N of the aneurysm from the side of the parent artery located outside the aneurysm and locked to the neck N of the aneurysm.

The invention discloses a bifurcated aneurysm stent which is of a self-expanding structure, at least one window is formed in the wall of the stent, and the window can be automatically opened after the stent is released from a micro catheter by means of the hyperelasticity of nickel-titanium alloy, so that the neck of the bifurcated aneurysm is covered. By means of the design, the embolism effect is guaranteed, meanwhile, the influence of the stent on lateral artery blood flow is remarkably weakened, and the risk that a traditional stent shields branch arteries is avoided. The intravascular metal content and the thrombus occurrence rate are effectively reduced, the wide-neck aneurysm treatment problem is solved, and the beneficial effects of being easy and convenient to operate, high in safety and capable of accelerating healing are achieved.

Implant for blood vessels, for influencing blood flow in the area of ​​aneurysms (A), wherein the implant (1) has a wall formed by isolated filaments (2, 2') that are joined to form a round braid, wherein the round braid is an endless braid cut to size, adopts an elongated shape with a reduced diameter in an implantation catheter (11) and expands at the implantation point, adapting to the diameter of the vessel and increasing the surface coverage, wherein the filaments (2, 2') of the round braid have shape memory characteristics, characterized in that the round braid is adjusted such that, when the stretching forces that bring the round braid to the elongated shape disappear, it extends to such an extent that, in the area of ​​an aneurysm neck where the vessel has a larger vessel diameter compared to the adjacent healthy vessel section,It adopts a greater surface coverage compared to the adjacent healthy vessel section.

This application discloses an aneurysm occlusion system, including an intra-aneurysm occlusion unit and an aneurysm neck occlusion unit. The intra-aneurysm occlusion unit is implanted into the aneurysm body via a microcatheter, and the shape of the intra-aneurysm occlusion unit is adapted to the shape of the aneurysm. The aneurysm neck occlusion unit is implanted into the carrier vessel via a microcatheter, and the aneurysm neck occlusion unit is fixedly connected to the intra-aneurysm occlusion unit. The aneurysm neck occlusion unit forms a seal on the aneurysm neck. Both the intra-aneurysm occlusion unit and the aneurysm neck occlusion unit are mesh structures woven from filaments. One technical advantage of this application is its highly rational structural design, simple operation, and ability to simultaneously occlude both the aneurysm body and the aneurysm neck, resulting in good occlusion efficacy and low recurrence rate. Furthermore, because this aneurysm occlusion system requires fewer implants within the carrier vessel, it has minimal impact on the carrier vessel and offers high safety.

The utility model relates to an aneurysm flow disturbing device, which comprises: a bottom expansion body in the shape of an ellipsoid or a bowl; a top expansion body in the shape of a cylinder or a circular truncated cone; one end of the bottom expansion body is connected with one end of the top expansion body; the end of the bottom expansion body close to the proximal end is concave inward to form a bottom concave part, and a proximal end mark is arranged in the bottom concave part; the end of the top expansion body close to the distal end is concave inward to form a top concave part, and a distal end mark is arranged in the top concave part. Compared with the prior art, the aneurysm flow disturbing device disclosed by the utility model not only can avoid the risk of occlusion of the carrying artery or branch blood vessel, but also can better conform to the aneurysm body, thereby effectively reducing the displacement risk of the aneurysm flow disturbing device after being implanted into the aneurysm cavity. With the healing of the aneurysm, the space-occupying effect is reduced, and the aneurysm neck is avoided to be left.

The invention relates to the technical field of aneurysm embolism stents, in particular to a stent and plugging integrated aneurysm embolism stent. According to the embolism stent, a self-expansion mesh basket is arranged on one side of the middle of a stent body, the embolism stent is released after being conveyed to a blood vessel where an aneurysm is located, the stent body is expanded firstly, the stent body is supported in the blood vessel firstly, then the self-expansion mesh basket is expanded again, and the large end of the self-expansion mesh basket extends into the aneurysm; the small head end is located at the aneurysm neck opening position, so that the self-expansion net basket can block the aneurysm neck opening of the aneurysm, the self-expansion net basket blocks blood flow in the aneurysm, immediate blocking is achieved, the risk of aneurysm rupture in the treatment process is reduced, and the long-term recurrence rate is possibly reduced; and the operation of the spring ring in the aneurysm is avoided, so that the risk that the spring ring protrudes into the aneurysm carrying artery or punctures the aneurysm is fundamentally eliminated.

A flow-diverting device is designed for endovascular aneurysm repair by occluding lesions without high metal load or aneurysm wall manipulation. It features a spiral barrier that covers the aneurysm neck and diverts blood flow to the aneurysm sac, promoting thrombosis. The freestanding, endovascular implant includes stent-like crowns for stable fixation and precise positioning. Made from a shape memory alloy, the device is constrained in a linear form within a delivery catheter and reverts to its functional shape upon catheter retraction.

The invention provides an electrocoagulation guide wire system. The electrocoagulation guide wire system comprises a net-shaped plugging device, a conveying piece, a core wire and a leading-in sheath. The conveying part is arranged on the side wall of the core wire in a protruding mode, the core wire and the conveying part are both contained in the guiding-in sheath, at least part of the near end of the core wire protrudes out of the near end of the guiding-in sheath, the net-shaped plugging device is configured to be shrunk in the radial direction and contained in the guiding-in sheath, and the guiding-in sheath is connected to the net-shaped plugging device in a sleeving mode. The net-shaped plugging device is at least partially clamped between the inner wall of the guiding-in sheath and the side face, away from the core wire, of the conveying piece. The side face, away from the core wire, of the conveying piece is configured to generate friction interference when the net-shaped plugging device slides away from the conveying piece. The far end of the net-shaped plugging device extends into an aneurysm cavity, and the net-shaped plugging device is plugged at the aneurysm neck after being expanded in the radial direction. The far end of the core wire is configured to at least partially extend into an aneurysm cavity and form an electric loop with a power supply through blood. The electrocoagulation guide wire system can achieve the purpose of electrocoagulation embolism treatment of wide-neck aneurysm.

The present application relates to the technical field of medical devices, and specifically discloses an electrocoagulation device for aneurysm occlusion. The device comprises an electrocoagulation occlusion device sleeved in a microcatheter and a delivery assembly. The electrocoagulation occlusion device comprises a thrombus limiting part in a flat porous structure and an electrocoagulation conductive part in a porous mesh structure, and the two are fixed at the center to form a fixed rivet point. The electrocoagulation conductive part can form an electric circuit with an external power source through the rivet point. The delivery assembly is provided with an arc-shaped claw, which can release or bind the fixed rivet point by moving away from or close to the electrocoagulation conductive part. The device is simple to release, reduces the dependence of the operation on the experience of the doctor, and shortens the operation time. The porous mesh structure increases the blood contact area and improves the electrocoagulation efficiency. The thrombus limiting part can cover the aneurysm neck to prevent embolus escape and allow blood to enter the aneurysm cavity. The electrocoagulation occlusion device is completely placed in the aneurysm cavity and does not contact the aneurysm wall, so it has a wide range of applications. The mechanical release mode is convenient for the doctor to control the electrocoagulation time independently.

The application discloses an intratumoral turbulence device, which comprises an umbrella-shaped elastic net disc, a pushing rod, a release section and a microcatheter. The umbrella-shaped elastic net disc is a double-layer structure woven by metal wires, and the points at the maximum diameter of the disc opening are all on a plane. Anchor devices are distributed around the two sides of the skirt edge of the umbrella-shaped elastic net disc, which are used for strengthening the fixation of the umbrella-shaped elastic net disc and the tumor wall, so that the umbrella-shaped elastic net disc can better adhere to the inner wall of the tumor cavity and is not easy to be displaced in the tumor cavity. The umbrella-shaped elastic net disc has a blocking area, and the middle position of the blocking area is opposite to the aneurysm neck. A coating for promoting the growth of vascular endothelial cells is arranged at the middle position of the blocking area of the umbrella-shaped elastic net disc. The coating can accelerate the endothelialization of the aneurysm neck position, so that the reconstruction of the aneurysm-carrying artery is realized, and the risk of aneurysm recurrence and recanalization is reduced.

A planning method for defining a placement position of a stent in an abdominal aorta of a subject is described. An abdominal aortic aneurysm portion of the abdominal aorta has an aneurysm sac and an aneurysm neck, a distal end of the aneurysm neck, a lower renal aortic ostium, a first distance between a distal end of the lower renal aortic ostium and the distal end of the aneurysm neck, and a second distance between a proximal end of the lower renal aortic ostium and the distal end of the aneurysm neck are identified in image data. The first distance is compared with a minimum stent length. A stent placement position is defined based on a selected stent length such that a distal end of the stent is aligned with the distal end of the aneurysm neck.

This application discloses a device and storage medium for auxiliary diagnosis and treatment decision-making for aneurysms. The device includes a processor and a memory, enabling the following operations: segmenting the aneurysm region and the parent artery region based on original three-dimensional vascular images; calculating key morphological parameters of the aneurysm based on the aneurysm region and the parent artery region; determining the aneurysm neck type based on the key morphological parameters, obtaining a neck classification result; dividing the aneurysm region into a main region and sub-regions; calculating three-dimensional spatial geometric parameters between the main region and the sub-regions; and determining the decision result for auxiliary diagnosis and treatment of the aneurysm based on the neck classification result and the three-dimensional spatial geometric parameters. Using the solution of this application, the aneurysm and parent artery can be automatically segmented, key morphological parameters can be accurately calculated, the neck type can be intelligently classified, complex substructures can be analyzed, and treatment suggestions can be output, providing objective and quantitative decision support for clinicians.