2652results about "Blood vessels" patented technology

The invention discloses a windowing covered stent blood vessel and a delivery system, and belongs to the field of medical instruments, the windowing covered stent blood vessel comprises a covered stent blood vessel main body and a windowing assembly arranged on the covered stent blood vessel main body; wherein the windowing assembly at least comprises a barrel-shaped structural part and a connecting part, and the barrel-shaped structural part is provided with a channel matched with the branch support; the connecting piece is used for connecting the cylindrical structural piece and the covered stent blood vessel main body; the connecting piece is provided with a buffer part, so that the cylindrical structural piece is flexibly connected with the covered stent blood vessel main body; according to the windowing assembly, blocking of the branch support can be effectively avoided, and good wall attaching performance can be provided for the embedded branch support through the buffering part.

The invention relates to a covered stent, a stent system and a manufacturing method of the stent system.The covered stent comprises a main stent body, a covering film and binding wires, the main stent body comprises a main corrugated ring and a main covering film, the main corrugated ring is covered with the main covering film, the binding wires comprise the first binding wire, and the covering film and the main stent body are connected to one side of the main stent body through the first binding wire; the covered stent further comprises a first positioning piece and a second positioning piece, the first positioning piece is arranged at the proximal end of the main stent, the second positioning piece is arranged at the proximal end of the envelope, and when the covered stent is in a natural expansion state, when the envelope is naturally attached to the main stent in the circumferential direction, the envelope is located at the proximal end of the main stent. The first positioning piece and the second positioning piece are roughly located on the same radial line. According to the covered stent provided by the invention, a second fixed connection point of the envelope of the covered stent and the main stent can be determined, and the envelope is prevented from being fixed to the circumferential opposite side of the target position of the main stent, so that the problem of release of the proximal end of the main stent is avoided.

A surgical anchor device for being anchored on the mucous membrane of the inner wall of the intestine, the device having a temporary anchor element presenting anchoring that can be modified in a controlled manner and having a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby the first wall presents an outer diameter that can be varied in controlled manner, wherein a portion of the inner surface of the first wall is lined with an independent leakproof inner sheath having only its longitudinal ends fastened to the anchor element to define a suction chamber between the inner sheath and the first wall, the temporary anchor element being coupled to a flexible or semi-rigid tube extending outside the anchor element, an open end of the injection-suction tube opening out into the suction chamber enabling air to be injected into or sucked out from the suction chamber.

The invention discloses a rigidity self-adaptive intravascular stent based on a three-dimensional virtual woven structure and a control method thereof. The method comprises the steps of reconstructing a preoperative tumor blood vessel three-dimensional model based on clinical iconography data, constructing a stent initialization model, starting a hexagonal knitting three-dimensional virtual algorithm, performing intravascular stent knitting modeling, realizing structural parameter optimization and adaptive stent expansion in combination with preoperative image data of a patient, and completing personalized deployment. The wire winding angle and the mesh density of each area of the stent are adjustable, the stent is adaptive to the complex intracranial aneurysm blood vessel form, accurate fitting and risk guiding are achieved, the treatment effect is improved, the postoperative complication risk is reduced, and the stent has good engineering suitability and clinical application prospects.

The invention relates to a covered stent and a stent system.The covered stent comprises a main stent body and a wrapping piece, the main stent body comprises a main corrugated ring and a main covering film, the main corrugated ring is covered with the main covering film, the wrapping piece is connected with the main stent body through a binding wire, the main stent body comprises a binding piece, and the binding piece is connected with the main stent body through a connecting wire. The binding piece comprises a part of the main body wave ring or comprises a binding line, the binding piece extends along the main body covering film, the main body covering film comprises a first through hole and a second through hole, and the first through hole and the second through hole are formed in the two sides of the extending direction of the binding piece respectively; and the binding wire passes through the first through hole and the second through hole and crosses the binding piece. The binding wire of the covered stent provided by the invention crosses the binding piece when penetrating through the main body covering film, when the covered stent is loaded or released, although the covering film and the main body covering film are pulled and stressed by the binding wire, the binding wire mainly pulls the binding piece, and when the binding wire is stressed, the possibility that film holes of the first through hole and the second through hole are expanded can be reduced, so that internal leakage is prevented.

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

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.

A medical appliance or prosthesis may comprise one or more layers of rotational spun nanofibers, including rotational spun polymers. The rotational spun material may comprise layers including layers of polytetrafluoroethylene (PTFE). Rotational spun nanofiber mats of certain porosities may permit tissue ingrowth into or attachment to the prosthesis. Additionally, one or more cuffs may be configured to allow tissue ingrowth to anchor the prosthesis.

Single and dual frame prosthetic venous valve assemblies, and catheter delivery systems and methods, are disclosed. A representative dual frame venous valve assembly includes an outer valve frame having a lumen and a frame and venous valve assembly arranged within the lumen. The frame and venous valve assembly, which also may be a stand- alone prosthetic venous valve assembly, includes an inner valve frame having a frame matrix forming lateral valve supports and valve commissure supports; a polymeric frame coating encapsulating the frame matrix; and a one or more polymeric leaflets integrally formed with or coupled to the polymeric frame coating, with each leaflet moveable between an open or partially open state and a closed or partially closed state. A delivery catheter includes keys or slots for insertion of locking tabs of the outer valve frame, and a deployment control handle for controlling deployment of the venous valve assembly.

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.

The invention relates to an intravascular stent auxiliary windowing method, device and system, computer equipment, a storage medium and a computer program product. The intravascular stent auxiliary windowing method comprises the following steps: constructing a first intravascular stent model based on a three-dimensional image of a blood vessel; displaying the first intravascular stent model on a first intravascular stent object in an overlapping manner; a virtual window hole contour in a preset circumferential range on the first intravascular stent model forms a mapping contour on the first intravascular stent real object, and the mapping contour is used for assisting in forming a windowing mark on the first intravascular stent real object; and rotation information is acquired, so that the first intravascular stent model and the first intravascular stent real object can synchronously rotate based on the rotation information. According to the method, the requirement for precise punching in a large range in the circumferential direction of the first intravascular stent can be met, and punching assistance in multiple positions in the circumferential direction of the first intravascular stent is achieved.

The devices and methods described herein include a body lumen fluid flow modulator including an upstream flow accelerator and a downstream flow decelerator. The fluid flow modulator preferably includes one or more openings that define a gap / entrainment region that provides a pathway through which additional fluid from a branch lumen(s) is entrained into the fluid stream flowing from the upstream flow accelerator to the downstream flow decelerator.

The invention provides a covered stent coated with an electrostatic spinning membrane and a preparation method thereof.The covered stent comprises a metal stent and a covering membrane, the metal stent is composed of a spiral metal wire, the metal wire is provided with a plurality of zigzag parts which are evenly arranged and connected end to end, every two adjacent zigzag parts are in a wave crest shape and a wave trough shape respectively, and the multiple zigzag parts enable the metal wire to be in a wave shape; the covering film covers the surface of the metal support to form a tubular structure, and the tubular structure can be kept shaped after bending deformation at the lesion position so that the tubular structure can be matched with the lesion position in shape. The covered stent has a high specific surface area and an adjustable porous structure, the micron-sized aperture of the covered stent can effectively prevent blood permeation, the high porosity allows a proper amount of tissue or cells to penetrate, vascularization and tissue integration of the implanted stent are promoted, and therefore the risk of stent displacement or instability is reduced.

The invention discloses an aorta covered stent and an aorta covered stent assembly, and belongs to the technical field of medical instruments. The aorta covered stent comprises a main covered stent body and branch covered stents; a mounting opening is formed in the main body covered stent; the branch covered stent comprises an outer port and an inner port, the side, close to the upstream, of the edge of the outer port is connected with the mounting port through a first membrane, and the first membrane is provided with a first outer convex face and a first inner concave face which are oppositely arranged; one side, close to the downstream, of the edge of the inner port is connected with the mounting port through a second membrane, and the second membrane is provided with a second outer convex surface and a second inner concave surface which are oppositely arranged; the first membrane and the second membrane are connected through the third membrane, and the first membrane, the second membrane and the third membrane seal the installation opening. The assembly comprises a connecting covered stent and the aorta covered stent. The aorta covered stent which does not need to cut the healthy blood vessel of a patient, and is wide in application range, high in flexibility and small in compression occupied space can be formed.

A prosthetic heart valve can comprise a stent frame radially movable between a contracted configuration and a maximum expanded configuration. The stent assembly can comprise a plurality of longitudinally extending jack strut assemblies, wherein each jack strut assembly comprises a proximal jack strut comprising a distal surface, a distal jack strut comprising a proximal surface, and a jack screw connecting the proximal jack strut and the distal jack strut. The proximal surface of each distal jack strut does not contact the distal surface of each respective proximal jack strut when the stent assembly is in the contracted configuration. The proximal surface of each distal jack strut contacts the distal surface of each respective proximal jack strut when the stent assembly is in the maximum expanded configuration.

A prosthesis assembly includes a stent frame that is expandable and configured for being positioned in the ascending aorta, and a receiving socket positioned within a proximal end of the prosthesis assembly. The receiving socket defines a recess for allowing flowthrough of blood into the stent frame. The receiving socket is further configured for selectively receiving a heart valve assembly for replacing a native heart of a patient or maintaining a mode of operation where the socket is empty and blood flows through the socket into the stent frame.

The invention discloses an aorta covered stent and an artery covered stent assembly, and belongs to the technical field of medical stents.The aorta covered stent comprises a main covered stent body and a positioning covered stent body capable of shrinking in the radial direction, the main covered stent body is provided with a branch connector allowing a branch covered stent body to be inserted therein, and the positioning covered stent body is communicated with the branch connector; the positioning covered stent is located in the main covered stent body, the diameter of the branch connector and the diameter of the positioning covered stent body which does not shrink in the radial direction are both larger than that of the branch covered stent body, and the positioning covered stent body is sleeved with a bundling rope sleeve which can be pulled to be folded. The component comprises a branch covered stent and the aorta covered stent. The structural characteristic that the diameter of the branch connector and the diameter of the non-contracted positioning covered stent are larger than that of the branch covered stent is utilized, the requirement for the precision of the corresponding positions of the branch covered stent and the branch connector can be lowered, the corresponding range of the branch connector is widened, and the influence caused by position deviation of fractures of branch artery blood vessels of different patients is lowered.

The present invention relates to a stent (1) and a catheter system (2) comprising such a stent (1), the stent (1) comprising: a self-expandable scaffold (10) extending along an axial direction (x) comprising a plurality of open cells (11) formed by a plurality of circumferential strut structures (12) connected by axial struts (13) extending along the axial direction (x), the scaffold (10) comprising an outside facing away from an interior (14) of the stent (1) surrounded by the scaffold (10), the interior (14) forming a passage for blood through the stent (1) in an implanted state of the stent (1), a proximal end (15) configured to be connected to a catheter (3) to allow returning at least the scaffold (10) into a lumen (30) of the catheter (3), and a cover (16) arranged at least on the outside of the scaffold (10), the cover (16) being further configured to carry a drug to be administered and / or to seal a vascular rupture.

The invention discloses a multi-branch covered stent, and belongs to the technical field of medical instruments. The proximal end covered stent of the multi-branch covered stent comprises a first main body stent, a first branch stent and a second branch stent, wherein the first branch stent and the second branch stent are arranged on the first main body stent; a first auxiliary support ring is arranged at the joint of the first branch stent and the first main body stent; and a second auxiliary support ring is arranged at the joint of the second branch stent and the first main body stent. According to the multi-branch covered stent, suturing is not needed when the stent is implanted, the operation time is short, the multi-branch covered stent can be matched with branch blood vessels on the aortic arch more easily, and the operation difficulty is low; the total specification number of the brackets is greatly reduced, and the stocking number of the brackets with common specifications is also greatly reduced; and the device can be suitable for more patients to use, and provides survival possibility for more patients.

The invention discloses a left auricle plugging device provided with a real-time atrial pressure monitoring chip, and particularly relates to the technical field of left auricle plugging, the left auricle plugging device comprises a plugging device body and a connector, the top end of the connector is provided with a signal supply module, and the signal supply module is located in the plugging device body; according to the left atrial appendage plugging device, after the inductor in the nut generates a voltage signal, the signal can be transmitted to the low-noise operational amplifier and amplified, meanwhile, the electromagnetic interference between the noise of a circuit and the outside world is restrained, and the plugging device can be used for plugging the left atrial appendage of the left atrial appendage of the left atrial appendage. The physical deformation is converted into corresponding electric signals, the electric signals are transmitted to an in-vitro receiving terminal through an antenna, and a doctor can indirectly judge the recovery condition of the atrial contraction function of the patient according to the pressure signal trend.

A surgical anchor device for being anchored on the mucous membrane of the inner wall of the intestine, the device having a temporary anchor element presenting anchoring that can be modified in a controlled manner and having a first substantially cylindrical multiply-perforated wall presenting properties of radial elasticity whereby the first wall presents an outer diameter that can be varied in controlled manner, wherein a portion of the inner surface of the first wall is lined with an independent leakproof inner sheath having only its longitudinal ends fastened to the anchor element to define a suction chamber between the inner sheath and the first wall, the temporary anchor element being coupled to a flexible or semi-rigid tube extending outside the anchor element, an open end of the injection-suction tube opening out into the suction chamber enabling air to be injected into or sucked out from the suction chamber.

The invention provides a covered stent system, which comprises: a) a covered stent comprising: i) a positioning assembly; ii) a first branch blood vessel windowing assembly, wherein the first branch blood vessel windowing assembly comprises a first sealing area and a first adjusting area; the first sealing area 111 comprises a third opening; the first adjusting area comprises a first opening, a second opening, a first reinforcing structure and a second reinforcing structure; and b) a first branch covered stent, wherein the first branch covered stent is used for being released in the first branch blood vessel windowing assembly.

An endoluminal stent and a stent system. The endoluminal stent (100) comprises a stent main body (10), a controlled-release structure (30) and a development assembly (40). The controlled-release structure (30) comprises a restraining unit (31) and a restraining point (33). The endoluminal stent (100) comprises a first region (100a) and a second region (100b) in a circumferential direction. It is defined that in a state where the endoluminal stent (100) naturally expands, a region of the endoluminal stent in the circumferential direction that can be spanned by the restraining unit (31) is the first region (100a), and a region in the circumferential direction that cannot be spanned by the restraining unit is the second region (100b). The restraining point (33) is arranged in the second region (100B), and the development assembly (40) is configured to indicate the position of the restraining point (33) in the circumferential direction. By providing the development assembly (40) to indicate the position of the restraining point (33) in the circumferential direction, the endoluminal stent (100) can be prevented from placing the second region, which is traversed by a limiting rod (73) on a lesser curvature side of a blood vessel when a controlled-release state is to be deactivated, thereby avoiding distal endoleak.

A system is provided for fenestration within a body lumen. The system includes an intraluminal device and a processor. The processor is configured to, from an imaging system, obtain a planning image including the lumen and a branch lumen extending from the lumen, and, in the planning image: identify a treatment device; identify a centerline of the branch lumen extending from the branch lumen to a desired puncture point on the treatment device; and identify a desired trajectory of the intraluminal device relative to the puncture point. The processor is also configured to, from a second imaging system, obtain a live procedural image including the lumen and the branch lumen; and in the live procedural image, identify the treatment device, the centerline of the branch lumen, the desired puncture point, the desired trajectory of the intraluminal device, and the actual trajectory of the intraluminal device.

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 orientable intravascular device having a “twelve o'clock” marker on a proximal and distal end for treating an aneurysm, including a packaging catheter with an identical fixed non-round shaped inner lumen, a pusher wire having an occlusion device releasably disposed on the distal end of said pusher wire, preloaded at a fixed circumferential orientation, with corresponding markers on the outside of said packaging catheter, a hub having an inner lumen that is shaped to marry with the outer lumen of the packaging catheter to deliver a delivery wire and occlusion stent in a predicted orientation, and maintaining such orientation as the wire and stent are advanced through said delivery catheter, and while said delivery catheter is withdrawn. Methods of using same are disclosed.

The invention discloses a blood flow maintaining device, an aorta covered stent system and a windowing method of an aorta covered stent, the blood flow maintaining device comprises a conveying sheath and a blood flow maintaining net basket, the conveying sheath comprises a sheath tube, and the blood flow maintaining net basket comprises a net basket and a pushing assembly; the net basket has an unfolded state and a folded state; the pushing assembly is connected with the net basket, and the pushing assembly is used for pushing the net basket in the sheathing canal; when the mesh basket is in an unfolded state after being released outwards from the far-end opening of the sheath tube, the mesh basket is suitable for supporting the aorta covered stent and forming a covered stent external blood flow channel on the outer side of the aorta covered stent. When the blood flow maintaining net basket is applied to an aortic arch intracavity isolation treatment operation, the net basket can ensure that the blood flow of each branch is not interrupted before branch windowing is completed, the requirements for hospital conditions and the operation level of an operator are reduced, the operation time is shortened, meanwhile, postoperative complications are reduced, and operation popularization is facilitated.

Systems and methods are described for modulating blood flow through a blood vessel. Devices may include one or more implantable devices comprising an expandable frame comprising a proximal end and a distal end and a longitudinal axis extending therethrough; a membrane comprising an inflow end and an outflow end, wherein the inflow end is at least partially installed within the distal end of the expandable frame; an actuator coupled to a control wire, the control wire being coupled to a portion of the membrane; a first magnet configured to induce rotation of the actuator to actuate the control wire to activate application of tension to the control wire and cause the membrane to radially collapse at the outflow end; and a second magnet configured to generate a changing magnetic field pole direction to cause rotation of the first magnet to cause the membrane to radially expand at the outflow end.

A covered stent and a preparation method thereof. The covered stent includes an inner-layer membrane, an outer-layer membrane, and a supporting framework located between the inner-layer membrane and the outer-layer membrane. The areas of the inner-layer membrane and the outer-layer membrane in supporting framework grids are mutually bonded. No extra adhesive is introduced into the covered stent, subsequent heating and melting are not needed to bond the inner-layer membrane and the outer-layer membrane of the supporting framework, and the covered stent has the advantages of being thin in membrane, small in pressing and holding outer diameter, high in bonding strength of the inner-layer membrane and the outer-layer membrane, good in mechanical property of the membranes and the like.

A prosthetic heart valve includes a collapsible stent and a valve assembly disposed within the stent. A first cuff is disposed adjacent the stent. A second cuff having a distal edge facing the outflow end of the stent is disposed about the stent radially outward of the first cuff and the stent. The stent may include a plurality of fingers each having a first end coupled to a corresponding cell of the stent and a free end adapted to extend radially outward of the corresponding cell. The distal edge of the second cuff may be coupled to the fingers at spaced locations around the circumference of the stent to position the distal edge radially outward from the corresponding cells at the spaced locations. Various stent struts may be tapered to reduce the stent circumference in the collapsed condition, and to improve the fatigue resistance and / or bendability of the stent.