234 results about "Stent grafting" patented technology

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.

An endoluminal prosthesis including a stent-graft formed of a stent and a base graft. The stent-graft is expandable in a radial direction of the endoluminal prosthesis and exhibits a self-expansion force in the radial direction such that the stent-graft is self-expanding in the radial direction from a compacted condition to a self-expanded condition. The endoluminal prosthesis further includes a radially restraining sleeve member having first and second ends and a middle portion, where each of the first and second ends are fixedly coupled to the stent-graft through a heat application process. The radially restraining sleeve member is adjustable to an adjusted diameter in the radial direction in a range of diameters between the self-expanded condition of the stent-graft and the maximum expanded condition of the stent graft through the application of an external force.

The invention relates to a conveying device, a catheter assembly comprises an inner core tube and an outer sheath tube, the inner core tube is movably assembled in a sheath tube inner cavity of the outer sheath tube, a restraining shaft cavity is formed between the outer wall of the inner core tube and the inner wall of the outer sheath tube and used for restraining a stent graft, and an adjusting assembly comprises an adjusting wire body. The adjusting line body is movably arranged in a collecting shaft cavity between the inner core tube and the outer sheath tube in a penetrating mode and used for being detachably connected with the far-end area of the small bent side of the stent graft. And an operator pulls the adjusting wire body outside the living body to adjust the position of the far-end area of the small bent side of the stent graft. In the adjusting process, the large bent side of the stent graft keeps still, the small bent side of the stent graft deviates towards the near end by a certain angle, an operator can judge whether the small bent side of the stent graft is adjusted to the expected form or not through auxiliary means such as DSA radiography, and finally the far-end area of the small bent side of the stent graft forms a good adherence effect. And the'beak 'phenomenon is solved.

To provide stent graft systems and methods of placing such stent graft systems for treating aortic aneurysms.SOLUTION: A stent graft system 100 includes a stent graft, an inflatable fill structure 130, and a cuff 140. The inflatable fill structure 130 at least partially surrounds the stent graft. In various arrangements, the inflatable fill structure 130 has a cavity that is bifurcated. A portion of the cavity is configured to receive a branch stent graft for connection to the stent graft. The cuff 140 is fillable and is located outside of the inflatable fill structure 130, and makes it possible to provide a seal with a wall of a blood vessel. The cuff 140 and the inflatable fill structure 130 are separately fillable from each other to different pressures with a fill medium. In various arrangements, the cuff has a tapered shape such that it is wider at one end than at an opposite end when filled with a fill medium.SELECTED DRAWING: Figure 1

The invention discloses a windowing covered stent blood vessel conveying system, and belongs to the field of medical instruments, the windowing covered stent blood vessel conveying system comprises a fixing rod, a membrane sleeve, a fixator and a handle assembly, and the fixing rod is provided with a convex part used for being connected with a windowing covered stent blood vessel in a matched mode; the membrane sleeve is used for covering a windowing covered stent blood vessel, and a plurality of wire penetrating holes are formed in the two sides of the membrane sleeve. The fixer is flexibly connected with the fixing rod; according to the fixing device, connection with the windowing covered stent blood vessel is achieved through the fixing rod and the fixing device, excessive shortening of the windowing covered stent blood vessel can be prevented in the constriction and release process, the released windowing covered stent blood vessel is distributed more evenly, and in addition, the fixing device can be used for fixing the windowing covered stent blood vessel. By means of the branch blood vessel positioner, accurate positioning of the branch blood vessel can be achieved conveniently, and the problem that the branch blood vessel is difficult to align is solved.

A stent graft delivery system includes a handle, a guidewire catheter extending distally from the handle, at least one tube, and at least one wire extending through the at least one tube, wherein each wire of the stent graft delivery system is configured as a loop at the distal end of the tube. The stent graft delivery system can be employed to implant stent grafts in a patient to thereby treat, for example, an aortic aneurysm spanning a region of an aorta that includes at least one arterial branch.

A branched graft method includes securing a first end of a branch graft into a first conduit and subsequently moving the second end into a second conduit. The first conduit may be a branch vessel, such as a renal artery and the second conduit may be a main graft that extends over an aortic aneurysm. The branch graft may be deployed starting at an offset distance from the first end, thereby preventing the deployed portion from insertion into the first conduit and predetermining the insertion length into the target vessel. The first end may then be deployed to secure the first end to the first conduit. A branch graft may be a self-expanding stent graft having one or more ripcords, and / or a serpentine ripcord that enables non-linear deployment of the branch graft, or deployment that does not progress from one end to the opposing end.

This document provides implantable intraluminal stent graft medical devices. In some embodiments, the stent graft devices provided herein are implantable in bodily conduits that have side branches, and the stent graft devices are operable to allow the flow of fluids between the conduit and the side branches. In some embodiments, the walls of the stent graft devices provided herein include compliant channels which allow for fluid communication between the interior and the exterior of the stent graft devices. In some embodiments, the compliant channels are configured to inhibit or reduce tissue ingrowth, tissue bridging, and / or endothelialization.

A stent assembly that is assembled in situ by separate delivery of two nested stents is configured to maintain a lumen in a bifurcated vessel. The stent assembly includes a first stent with a first opening at a first end, a second opening at a second end, and an intermediate opening on a lateral side of the first stent between the first and second openings. The stent assembly further includes a second stent with a first opening at a first end, a second opening at a second end and an intermediate opening on a lateral side of the second stent between the first and second openings. A portion of the second stent with the intermediate opening is nested within the first stent.

The present invention relates to a TIPS stent-graft comprising a tubular member having a lumen extending therethrough, the tubular member comprising a balloon-inflatable central section and first and second self-expanding sections sandwiching the central section, the lumen extending through the first section, the central section and the second section, the stent-graft being selectively collapsible of the central section.

An endovascular branch coupler stent graft includes a tubular stent assembly defining a central opening and four branch channels disposed in the central opening and attached to the tubular stent assembly. The four branch channel extends along the length of tubular stent assembly. Each branch channel is configured to receive a covered stent for catheterizing a branch vessel. Similarly, the central opening configured to receive a primary stent graft for reinforcing weakened sections of a subject's aorta.

The present application discloses a stent graft and a method for navigating the stent graft to a branch vessel, the stent graft comprising a main body and at least one lateral side branch connected to the main body, a stent graft system and a method for implanting the stent graft, including interconnecting the stent grafts.

A delivery system for an implantable device includes an elongate member and a main body coupled to the elongate member. The main body has a main body wall defining a main body lumen and a side branch portal through the main body wall. A guide member extends along at least a portion of the elongate member, into the main body lumen, and through the side branch portal. A guide member retainer assembly includes a retainer coupled to the guide member and defining a retainer eyelet. A release wire extends through a portion of the main body wall and the retainer eyelet to engage the retainer eyelet, restricting the guide member from being retracted along the elongate member by the engagement between the release wire and the retainer eyelet.

A tubular prosthetic device for implantation into a body lumen includes a first part including a tubular lumen and a second part including an attachment member. The second part is secured to the first part via various configurations, where the device is capable of being reduced to a diameter less than the diameter of traditional devices, for ease of use during implantation.Methods of using the device are also provided.

The present invention is related to a drug-coated covered stent the drug coated covered stent is a novel medical device designed to address Type III coronary artery perforations during percutaneous coronary intervention (PCI). This system combines a balloon-expandable stent covered with a biocompatible graft material and coated with cytotoxic drugs at its ends to prevent excess tissue growth and promote endothelialization. through a rapid exchange delivery system, the DCCS can be precisely positioned and expanded within the artery, sealing tears and promoting healing. The device's ultrathin profile and high flexibility enable navigation through tortuous vessels. Key components are a blocking balloon (201), second guidewire (203), covered stent (205), proximal and distal shafts of the delivery system (1, 2, 3, 15 4), stent (5), graft material (6), cytotoxic drug coatings (8, 9), and endothelialization (11). This innovative solution offers a promising approach to managing coronary artery perforations, potentially reducing the need for surgical interventions.

The present invention discloses a stent graft, comprising a plurality of coils, wherein the plurality of coils are arranged in an axial direction; a membrane, wherein the membrane is arranged on the plurality of coils, wherein the membrane and the plurality of coils form a hollow tubular structure with openings at both ends, wherein the membrane is woven from wires; and a restraining member, wherein the restraining member is provided at the edge of at least one open end of the hollow tubular structure, wherein the end of the membrane is covered by the restraining member, thereby restraining the wires at the end of the membrane. According to the stent graft of the present application, by providing a restraining member at the opening of at least one end of the hollow tube formed by the membrane and the plurality of coils, the end of the membrane is covered by the restraining member, thereby restraining the wires at the end of the membrane, thereby effectively preventing the trimmed wires at the edge of the membrane from extending through the pores of the restraining member, preventing the burr fibers at the edge of the membrane from irritating and damaging the blood vessels at the implantation site, and reducing unnecessary damage to the patient.

Disclosed is a stent graft, including a graft body, a sealing stent at the proximal end of the graft body and completely overlapped by the graft body, and a diameter reducing loop arrangement. The sealing stent includes proximal apices at a proximal end thereof and distal apices at a distal end thereof. The diameter reducing loop arrangement includes a loop element. The loop element includes a first end, a second end, and a strand section from the first end to the second end. The first end is attached to the distal end of the sealing stent. The loop element is configured to pass circumferentially around the distal end of the sealing stent and have a release wire pass through a loop at the second end. The diameter reducing loop arrangement is configured to constrict the distal apices of the sealing stent and cause the sealing stent to adopt a substantially conical or frustoconical shape.

Methods and devices for customizing perforations of a stent graft and re-sheathing the stent graft into a delivery system. A fenestration tool may be used to create a fenestration at a desired location on the stent graft. The fenestration tool has a harpoon that pierces the graft material, and a blade holder that surrounds the harpoon and spins to create a circular fenestration based on physician controls. To re-sheath the stent graft, the physician can slide a funnel over the stent graft, causing the stent graft to constrict and enter an attached crimp tube. The physician can remove this funnel and attach a second funnel to the stent graft cover. Manipulation of a handle of the delivery system can move the stent graft cover and attached funnel to force the constricted stent graft out of the crimp tube and into the cover.

The present invention provides a stent graft, comprising a proximal end closed area, a concave guide area and a distal end closed area arranged in sequence, the proximal end closed area and the distal section closed area are provided with a plurality of closed rings, the concave guide area is provided with a plurality of guide rings, the coating is attached to the closed rings and the guide rings, the guide ring comprises: a support ring and a concave ring, the concave ring comprises a flat band and a normal band, the support ring is connected to the concave ring and is located outside the flat band, the coating is concave inwardly along the circumference of the local area of ​​the stent graft and attached to the flat band to form a concave coating. The concave ring of the present invention can fix the free concave coating while maintaining its concave shape, preventing the concave coating and the pre-opening from being displaced by the impact of blood flow, the support ring has a supporting function, and the short wave rod connected to the concave ring can effectively enhance the stability of the long wave rod, which can reduce the difficulty of the doctor's operation.

A method of providing support in an aortic region. The method includes wrapping a landing band around an outside of a portion of an aortic vessel in a vicinity of a sinotubular junction (STJ) to form a wrapped portion of the aortic vessel. The method further includes securing the landing band to form a secured landing band. The method also includes endovascularly delivering a stent graft in a radially constricted configuration into the aortic vessel. The method also includes deploying the stent graft to a radially expanded configuration such that the stent graft contacts the wrapped portion of the aortic vessel. The method also includes connecting the stent graft in the radially expanded configuration to the secured landing band.

The subject of the invention is a self-expanding, covered at least partially by a coating (16), endoluminal prosthesis, comprising: - a stent-valve part (1"), containing a metal frame (10) and an aortic valve (14) secured inside it, - a stent-graft part (1'), containing a metal frame (8, 8'), - an intermediate part (4), joining the stent-valve part (1") with the stent-graft part (1') and having less stiffness than the stent-valve part (1") and the stent-graft part (1'), wherein the stent graft part (1') comprises a tapered section (13) narrowing inwardly towards the intermediate part (4), the tapered section (13) is equipped with at least one branch (5', 5") covered by a coating (16).

The covered stent comprises a first stent body, a second stent body and a covering film, the covering film and the first stent body are combined to form a lumen structure with the two ends open and the middle provided with a groove, the first stent body comprises a plurality of first wave rings and at least one second wave ring, the first wave rings are located at the two ends of the first stent body, and the second wave rings are located at the two ends of the second stent body. The second wave ring is located in the middle of the first support and is opposite to the groove in the radial direction. The second stent is of a net-shaped structure formed by weaving metal wires or cutting a metal tube, or the second stent comprises a plurality of third wave rings arranged at intervals or non-intervals, at least part of the second stent is contained in the groove and connected with the first wave rings or the covering film, and the second stent has the radial supporting performance; a distance is kept between the bottom surface of the groove and the opening of the branch blood vessel. The covered stent can avoid or slow down the opening, attached to the branch blood vessel, of the bottom face of the groove.

A stent graft assembly including a main body and a branch coupling extending radially from the main body. A proximal end of the single branch stent device is configured to seal in an ascending portion of an aorta. The assembly further includes a modular stent device including a proximal end and a distal end. The proximal end of the modular stent graft is configured to couple to a distal end of the single branch stent device. The modular stent device includes a main body configured to couple inside the main body of the single branch stent device. The modular stent device includes a bypass gate and an artery leg. The modular stent device is configured to bifurcate at a bifurcation point from the main body to the bypass gate and the artery leg outside of and distal the distal end of the single branch stent device.

Systems and methods for reloading a stent graft delivery device are disclosed. Additionally, a kit including a patient-specific fenestration template, fenestration rings and sutures can be provided for forming fenestrations in a preexisting, or generic, stent graft with the fenestrated stent graft then reloaded within the sheath of the delivery device for deployment within a patient.

To provide a prothesis device which can be arranged in a natural blood vessel.SOLUTION: A stent graft prothesis which repairs a deficit natural blood vessel includes a tubular fabric member having a first end and a second end. At least one of the ends is supported by a combination of two cooperating ring stents having different configurations. The tubular fabric member is attached to the ring stents at the time of being selected. At least one of the ring stents can be compressed in a folded "saddle" shape having two projections and two recesses. The other of the ring stents crosses at four points on the "saddle" shaped ring stent. Each of the points are in a region between the projection and recess of the folded "saddle" shape. When developed, the other ring stent is selected from a ring stent provided with one or more of a circular or cylindrical shaped, or a saddle shaped, or a V-shaped hinge part having a curved part therebetween.SELECTED DRAWING: Figure 1

The utility model provides an aorta abdominalis graft infection stent extraction device, which comprises a main body, a stent recovery clamp and an operating handle, an accommodating cavity is arranged in the main body, the accommodating cavity is exposed at the front end of the main body, the surface of the main body is smooth, the operating handle is positioned at the rear end of the main body, and the stent recovery clamp is arranged in the accommodating cavity. The operation handle pushes and pulls the support recovery clamp. The main body comprises an outer layer, an inner layer and a barb recovery part, the inner layer is arranged in the outer layer, and the front end of the inner layer is located on the rear side of the front end of the outer layer; the barb recovery part is located between the inner layer and the outer layer, and the barb recovery part is connected with the front end of the inner layer, so that the safety of taking out the stent graft is guaranteed, and damage to the aorta wall is avoided.

A stent graft device that includes a frame, a cover material covering the frame, and an anchoring member having an adjustable geometry is provided. The anchoring member may be incorporated as part of the frame or coupled thereto. The anchoring member may be formed of a material having a tensile strength such that it can be bent, straightened, or otherwise changed in shape. Tissue growth over and / or around the anchoring member anchors the stent graft device within a lumen. During removal of the stent graft device, the geometry of the anchoring member changes to allow the anchoring member to be removed from the tissue growth along a removal path with minimal trauma. The design and / or shape of the anchoring member is not particularly limited so long as the anchoring member has an adjustable geometry that permits tissue overgrowth and subsequent removal from the tissue overgrowth with minimal trauma.