363 results about "Stent grafting" patented technology

A stent graft delivery system for delivering an aortic prosthetic device includes a handle, an internal lead screw assembly within a track of a handle body of the handle, a lead screw nut that extends about the handle body and threadable engaged with the threaded portion of the internal lead screw assembly, a support member fixed to the handle body, a sheath extending about a portion of the support member and fixed to the internal lead screw assembly, and a hemostasis valve about the supporting member and between the sheath and the lead screw assembly.

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 stent graft system including a component having longitudinally extending outer surface and inner surface, the inner surface defining a lumen having a longitudinal axis, a plurality of stents distributed longitudinally along the component, and a plurality of suture loops, each suture loop attached to the inner outer surface, of the stent graft, a first suture loop spaced laterally and longitudinally relative to an adjacent suture loop when the component is in an expanded configuration, the plurality of suture loops aligned longitudinally along the stent graft when the stent graft is in a radially constricted configuration, at least one ligature having a proximal end and a distal end, the ligature extending through at least some of the plurality of suture loops, whereby tension on the at least one ligature longitudinally aligns the suture loops along the longitudinal axis of the component, thereby at least partially radially constricting the stent graft.

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 an endovascular stent comprising a tubular expandable lattice structure comprising a plurality of negative Poisson' s ratio (NPR) cells in connection with at least one row of positive Poisson's ratio (PPR) cells provided along a length of the stent. Each NPR cell may have a shape of a re-entrant (RE) hexagon. The stent may be automatically bent after expansion. The invention also relates to an endovascular stent graft comprising the endovascular stent and a liner provided around the endovascular stent.

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 invention relates to the technical field of medical instruments, in particular to a guide wire assembly for abdominal aortic aneurysm interventional therapy, which comprises a guide wire, the guide wire is used for being inserted into an abdominal aorta to serve as a delivery track of a covered stent, two groups of iliac arteries are arranged at the bottom end of the abdominal aorta, a tumor body is arranged on the outer side of the abdominal aorta, and a delivery head is arranged at the outer end of the guide wire. The outer side of the guide wire is sleeved with a first handle, a first rod body and a guide head, the two ends of the first rod body are fixedly connected with the first handle and the guide head respectively, a memory alloy frame is arranged on the covered stent, the guide wire assembly comprises a stent mounting mechanism and a function conversion mechanism, and the stent mounting mechanism comprises a stent release module and a positioning expansion module. The covered stent can be stably conveyed to the corresponding position in the guide wire by pushing the first handle, the covered stent can conveniently release a tumor body in the guide wire, the feeding stability can be conveniently improved, the covered stent can be released by pulling the third handle, and rapid forming of the covered stent is facilitated.

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 closure mechanism for closing a tubular portion of a graft that includes a closure element having aperture or looped ends. The closure element is provided around the circumference of a tubular length of graft material and is attached thereto. The closure element is biased into an annular profile by threading a release element through the ends holding them together. In its annular profile, the closure element thus holds the lumen of the tubular length of graft material in an open configuration. Withdrawal of the release element causes the closure element to take on a flat / linear profile, pulling the lumen closed as it does so. The closure mechanism can be used in a vascular implant such as a graft, stent graft, including tubular, bifurcated, and branched stent grafts, an occlusion device, or the like.

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 provides an abdominal aortic stent graft group, which relates to the field of medical devices, including a stable stent graft and a main stent graft; the stable stent graft includes a transverse straight stent graft segment, a longitudinal straight stent graft segment, a conical graft and an X-shaped stent; a portion of the X-shaped stent is fixedly connected to the conical graft, and another portion of the X-shaped stent is fixedly connected to the transverse straight stent graft segment and extends to the graft surface of the transverse straight stent graft segment away from the conical graft; the main stent graft includes a main cylindrical graft and a main stent, and at least one group of clamping pieces is fixedly connected to the distal surface of the main cylindrical graft; in the combined state, the distal opening of the main cylindrical graft is sleeved with the proximal opening of the longitudinal straight stent graft segment, and the flange of the clamping piece is clamped at the stent bend at the proximal end of the longitudinal straight stent graft segment. The present invention can be applied to abdominal aortic aneurysm endovascular repair surgery for patients with abdominal aortic aneurysms that do not involve the iliac artery and unilateral femoral artery access difficulties.

This invention provides a leak-proof fabric, a covered stent, and a processing method thereof, relating to the field of covered stent technology. The leak-proof fabric provided by this invention has a base area and a leak-proof area, which are integrally woven together. The leak-proof area is woven with foam components, which have a dehydration shrinkage state and a water absorption swelling state. The foam components are woven together, resulting in a tighter structure, more uniform water absorption and swelling, and no shedding. It is particularly suitable for use as a cover for covered stents, which can prevent endoleaks during endovascular repair surgery and promote platelet aggregation and fibrinogen deposition in blood vessels, thereby rapidly forming thrombi and helping to achieve vascular embolization.

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.

A stent graft of the present disclosure includes a graft having a cylindrical shape and an end stent connected to at least an axial end of the graft. The end stent includes a hooking portion hooked on a stent constraining mechanism of a delivery device so as to constrain expansion of the end stent, the hooking portion includes a part protruding from the axial end of the graft to an outer side in an axial direction, and a protrusion length of the part is configured to be shortened by expansion of the axial end of the graft together with the end stent. The variable range of the protrusion length of the hooking portion may include zero.

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.

A stent graft delivery system and method of assembling the same is disclosed. The stent graft delivery system includes a stent graft cover configured to maintain a stent graft in a constricted configuration, and is configured to slide relative to the stent graft to enable the stent graft to expand radially outwardly. The stent graft cover extends along a first central axis. A tapered tip defining an opening therethrough is configured to track along a guidewire. The opening extends along a second central axis that is offset from the first central axis. This provides a delivery system with an opening in a leading edge that is not center relative to the outer stent graft cover.

A stent graft system includes a primary body having a proximal end, a distal end, a first tubular graft material and multiple stents attached to the first tubular graft material. A first branch has a second tubular graft material forming a first branch lumen. The first branch traverses a first fenestration configured in the primary body with a first wire loaded therethrough. A second branch has a third tubular graft material and a second branch lumen. The second branch traverses a second fenestration configured in the primary body with a second wire loaded therethrough. A third branch has a fourth tubular graft material and a third branch lumen. The third branch traverses a third fenestration configured in the primary body with a third wire loaded therethrough. A method for placing a stent graft system is also described.