70 results about "Braided stent" patented technology

A braided stent (1) for transluminal implantation in body lumens is self-expanding and has a radial expanded configuration in which the angle α between filaments is acute. Some or all of filaments (6,7) are welded together in pairs at each end (4,5) of the stent to provide beads (8), thereby strengthening the stent and assisting its deployment from a delivery device. The stent is preferably completely coated using a biocompatible polymeric coating, said polymer preferably having pendant phosphoryl choline groups. A method of making the stent by braiding and welding is described as well as a delivery device for deploying the device.The present invention provides a biocompatible crosslinked coating and a crosslinkable coating polymer composition for forming such a coating. The biocompatible crosslinked coating may be formed by curing a polymer of 23 mole % (methacryloyloxy ethyl)-2-(trimethylammonium ethyl) phosphate inner salt, 47 mole % lauryl methacrylate, 5 mole % γtrimethoxysilyl propyl methacrylate and 25 mole % of hydroxy propyl methacrylate. The crosslinkable coating polymer may include 23 mole % (methacryloyloxy ethyl)-2-(trimethylammonium ethyl) phosphate inner salt, 47 mole % lauryl methacrylate, 5 mole % γtrimethoxysilyl propyl methacrylate and 25 mole % of hydroxy propyl methacrylate.<?insert-end id="INS-S-00001" ?>

A method of braiding a stent includes braiding a number of elongate filaments around a mandrel using tensioned braiding carriers without spooling the filaments to the tensioned braiding carriers to form a braided stent having atraumatic ends.

A braided stent to be implanted in a blood vessel comprises a hollow body which is stretchable in its longitudinal direction and whose circumferential surface is formed by a braid of a multiplicity of filamentary elements which, in the expanded state of the braided stent, intersect a plane, perpendicular to the longitudinal direction, at a braiding angle. The braided stent has a smaller braiding angle in a central portion than in its distal and proximal portions which adjoin the central portion in the longitudinal direction.

A stent loading and delivery system includes a delivery catheter having a catheter lumen, a stent loading assembly adjacent a distal end of the delivery catheter, and a braided stent disposed on the stent loading assembly. The stent loading assembly is configured to retain the stent in an expanded state until just prior to insertion into a patient at which time the stent loading assembly elongates and compresses the stent into a delivery configuration.

A braided stent comprises a filament having at least one circular zone and at least two non-circular zones. Embodiments of the braided stent have a proximal segment, a middle segment, and a distal segment, wherein a porosity of the middle segment is lower than, a respective porosity of the proximal and distal segments. In one embodiment, a radial pressure of the middle segment is separately controlled to be different from, e.g., less than, a radial pressure of the distal segment. In another embodiment, a stiffness of the middle segment is separately controlled to be different from, e.g., less than, a stiffness of the distal segment.

A stent and method for making the stent are provided. The stent comprises regions of differing numbers of braided filaments to provide a stent with different dimensions and / or properties in different regions along the stent length. A preferred stent comprises a first and second plurality of braided filaments each braided together. The second plurality of braided filaments is braided into the first plurality of braided filaments to form a region of different properties than the first. A preferred embodiment is a stent having a narrower diameter along a more flexible region and a broader diameter along a more rigid region. Also included is a method of constructing a braided stent in accordance with the above. The method comprises the steps of braiding a first plurality of filaments to form the flexible portion, combining a second plurality of filaments to the first plurality of filaments, and then braiding the second plurality of filaments with the first plurality of filaments to form the more rigid region from the combination of the first and second plurality of filaments, wherein the second plurality of filaments are braided only in the rigid region.

The present invention includes a braided stent and method of making the same. The braided stent has an integral retrieval and / or repositioning member. The stent includes a first open end, a second open end and a tubular body therebetween. The retrieval and / or repositioning member extends from and is interbraided into the braided tubular body. The retrieval and / or repositioning member includes an elongated portion extending from the first open end and a second section interlooping circumferentially about the first open end such that force exerted on the elongated portion causes radially contraction of the stent end and stent body.

A stent and method for making the stent are provided. The stent comprises regions of differing numbers of braided filaments to provide a stent with different dimensions and / or properties in different regions along the stent length. A preferred stent comprises a first and second plurality of braided filaments each braided together. The second plurality of braided filaments is braided into the first plurality of braided filaments to form a region of different properties than the first. A preferred embodiment is a stent having a narrower diameter along a more flexible region and a broader diameter along a more rigid region. Also included is a method of constructing a braided stent in accordance with the above. The method comprises the steps of braiding a first plurality of filaments to form the flexible portion, combining a second plurality of filaments to the first plurality of filaments, and then braiding the second plurality of filaments with the first plurality of filaments to form the more rigid region from the combination of the first and second plurality of filaments, wherein the second plurality of filaments are braided only in the rigid region.

A stent for use in a body passageway includes a plurality of wires braided to form a self-expanding braided tubular structure. The braided wires form braiding angles along a length of the tubular structure. A portion of the wires are plastically deformed to reduce foreshortening of the braided structure.

The braided stent with a shortenable tether of the present invention includes a stent for use in a vessel having a vessel wall including a braided stent framework having a first framework end and a second framework end; and a plurality of shortenable tethers, each of the plurality of shortenable tethers having a first tether end and a second tether end, the plurality of shortenable tethers being disposed along a length of the braided stent framework and fixed to the braided stent framework at the first tether end and the second tether end. The plurality of shortenable tethers shorten in response to vessel conditions to urge the first framework end and the second framework end toward each other when the stent is deployed in the vessel to urge a circumference of the braided stent framework toward the vessel wall.

Branched braided stent or graft devices and processes for fabrication of the devices are disclosed in which a trunk portion and two hinge leg portions are fabricated in one piece braided from a single plurality of filaments, whereby the legs contain the full plurality of filaments and the trunk portion contains a subset of the same plurality of filaments. The fabrication process involves braiding the hinged legs on a mandrel while retaining loops of filament between the hinged leg portions for subsequent braiding of the trunk portion of the stent or graft.

A bifurcated, braided stent has a body that branches into a plurality of legs and is adapted for deployment in a lumen. At least a portion of each leg of the stent comprises a discrete plurality of continuous filaments braided together, and at least a portion of the body comprises one or more of the continuous filaments from each of the legs braided together. The stent can be used for treating a diseased bifurcated lumen of a human being by deploying the stent therein. The stent can be constructed by a process comprising braiding each plurality of filaments to form the leg sections, and braiding one or more filaments from each plurality of filaments together to form the body. The process may be performed by creating the legs first and then the body, or vice versa. The stent may be constructed on a mandrel using a braiding machine.

A stent and method for making the stent are provided. The stent comprises regions of differing numbers of braided filaments to provide a stent with different dimensions and / or properties in different regions along the stent length. A preferred stent comprises a first and second plurality of braided filaments each braided together. The second plurality of braided filaments is braided into the first plurality of braided filaments to form a region of different properties than the first. A preferred embodiment is a stent having a narrower diameter along a more flexible region and a broader diameter along a more rigid region. Also included is a method of constructing a braided stent in accordance with the above. The method comprises the steps of braiding a first plurality of filaments to form the flexible portion, combining a second plurality of filaments to the first plurality of filaments, and then braiding the second plurality of filaments with the first plurality of filaments to form the more rigid region from the combination of the first and second plurality of filaments, wherein the second plurality of filaments are braided only in the rigid region.

Implantable medical devices and prosthesis for rapid regeneration and replacement of tissues, and methods of making and using the devices, are described. The medical devices include a complex three-dimensional braided scaffold with a polymer composition and structure tailored to desired degradation profiles and mechanical properties. The composite three-dimensional braided scaffolds are braided from yarn bundles of biodegradable and bioresorbable polymeric fibers and / or filaments. Monofilament fibers and / or multifilament fibers can be twisted / plied in different combinations to form multifilament yarns, composite multifilament yarns, or composite yarns. The medical devices are useful as both structural prosthetics taking on the function of the tissue as it regenerates and as in vivo scaffolds for cell attachment and ingrowth.

An insertion system with a self-expanding braided stent (11) for implantation in a blood vessel has an outer sleeve (12) with a distal end (14) and a proximal end. An inner sleeve (16) arranged in the outer sleeve (12) is displaceable relative to the latter and protrudes, with a handling section, from the proximal end of the outer sleeve (12). Moreover, at the distal end (15), there is a tip (18) which is securely connected to a stent support (24) on which the braided stent (11) is arranged in its loaded state. The stent support (24) is arranged to be displaceable relative to the inner sleeve (16).

A self-expanding braided stent includes at least a distal radial expansion ring added to a distal end of the stent body to increase a radial expansion force of the self-expanding braided stent in deployment of the stent, and to facilitate advancement of the stent through a delivery sheath by a core advancement wire. A proximal radial expansion ring is optionally added to a proximal end of the stent body to allow the stent to be recaptured following partial deployment by retraction of the core advancement wire, prior to full deployment of a proximal portion of the stent body.

An insertion system with a self-expanding braided stent (11) for implantation in a blood vessel has an outer sleeve (12) with a distal end (14) and a proximal end. An inner sleeve (16) arranged in the outer sleeve (12) is displaceable relative to the latter and protrudes, with a handling section, from the proximal end of the outer sleeve (12). Moreover, at the distal end (15), there is a tip (18) which is securely connected to a stent support (24) on which the braided stent (11) is arranged in its loaded state. The stent support (24) is arranged to be displaceable relative to the inner sleeve (16).

A braided stent includes coiled distal and proximal anchors adapted to be disposed in the kidney and bladder, respectively. The stent is threaded onto an elongate member which is advanced distally to position the stent through the ureter. The stent may be releasably coupled to a guidewire and advanced distally by a tubular positioner threaded over the guidewire. Retracting the guidewire into the positioner releases the stent and completes deployment. The stent may include a distal nosepiece which may be inserted through a side port and into a first lumen of a dual lumen tube. A rod in the first lumen is advanced forward to engage the nosepiece and thus move the stent distally. Retraction of the rod disengages the stent and thus completes deployment. A second lumen in the tube receives a guidewire which may be moved independently of the rod and stent.

An expansion ring for a braided stent includes a plurality of elongated forked frame elements forming the expansion ring. Each of the frame elements includes first and second legs extending in one direction and connected together at a junction portion forming a fulcrum allowing compression of the frame elements, and each of the frame elements are threaded through interstices in a tubular body of the braided stent so that the junction portions engage the tubular body of the braided stent. Each of the frame elements is connected sequentially to adjacent frame elements at the ends of the first and second legs, and the expansion ring has a compressed configuration with a first diameter and an expanded configuration with a second diameter larger than the first diameter.

The invention relates to a woven stent. The woven stent is formed by weaving a plurality of wires, and is characterized in that: the wires at the end of the woven stent are divided into a plurality of strands according to the number of the wires of the woven stent, wherein all the wires in each strand of wires are fixed together. By the woven stent, the wires at the end of the woven stent can be effectively prevented from being scattered, and adherence to the wall and infusion performance of the stent are improved.

The invention discloses an intravascular prosthesis. Particularly, the prosthesis comprises i layers of tubular intravascular stents, wherein 2<=i<=8, and the prosthesis is used for treating aortic dissection and arterial aneurysm lesion, particularly ascending aortic aneurysm; the tubular intravascular stents are divided into dense mesh weaved stents and sparse mesh weaved stents, the dense meshweaved stents are large in mesh density, and the sparse mesh weaved stents are small in mesh density; the quantity of the dense mesh weaved stents is m, wherein 1<=m<=4; the quantity of the sparse mesh weaved stents is n, wherein 1<=n<=4, and i=m+n; the dense mesh weaved stents and the sparse mesh weaved stents are coaxially stacked together in the circumferential direction, are used for cooperatively supporting the blood vessel and mutually limit axial stretching or shortening deformation of the stents. By means of the prosthesis in the blood vessel, through a stent interventional operation,the aortic dissection can be effectively treated, particularly the aortic dissection or arterial aneurysm incapable of being subjected to interventional treatment by current clinical medicine.

The invention belongs to the technical field of medical apparatus and instruments, and particularly relates to a hybrid braided stent. The hybrid braided stent comprises a stent body, and the stent body is of a single-layer structure. The stent body is of a cylindrical structure formed by weaving at least two wire bodies in a staggered mode, and end areas of the at least two wire bodies are not completely the same. The stent body of the hybrid braided stent is formed by weaving at least two wire bodies in a staggered mode, and the end areas of the at least two wire bodies are different. The wire bodies with large end areas enable the stent body to have good supporting force, so that the stent body is tightly attached to a blood vessel, and the good positioning is achieved. The wire bodieswith small end areas enable meshes of the stent body to be small, after the stent body is installed in the blood vessel, plaques are stressed more evenly and are not prone to breakage, and even if theplaques are broken, the stent body can effectively prevent fragments of the plaques from flowing to the downstream of the blood vessel. In conclusion, compared with the prior art, the use safety of the sent body is better.