14 results about "Braided stent" patented technology

The invention provides a braided stent, the ends of at least two adjacent braided wires which are spiral in the same direction in the braided stent are connected through a connecting structure, and the connecting structure is of a smooth structure; in this way, looseness and deformation of the end of the woven stent can be reduced, the risk of load shedding and withdrawing failure can be reduced, and the end of the stent is soft, moderate in supporting force and low in pushing resistance.

A stent with varying porosity is described. The stent can be comprised of multiple stents attached together. A braided stent may have selected regions of increased thickness. The stent may be comprised of wires that are welded together at their ends in order to minimize vessel trauma. The stent may comprise a helically wound radiopaque wire wound through the stent.

This invention provides a braided support and a braided support system. The braided support is a tubular braided mesh structure and has an expanded state and a compressed state. The braided support includes at least one first rib and at least one first developing element, wherein the first rib is composed of at least two filaments, and the first developing element is disposed on at least one of the first ribs. The braided support system of this invention is woven from two or more filaments that contain some or all of the developing material, which can improve the developability of the braided support while maintaining a relatively small ratio of developing braids to non-developing braids, i.e., without affecting the radial support force or the opening of the support.

This relates to stents for implantation in body tubal lumens and related methods. [Solution] The stent is an elongated tubular member expandable from a radially folded configuration to a radially expanded configuration, comprising a first plurality of filaments extending in a first helical direction and a second plurality of filaments extending in a second helical direction, wherein the first plurality of filaments extending in the first helical direction and the second plurality of filaments extending in the second helical direction overlap to form a plurality of cells arranged in rows extending circumferentially around the elongated tubular member. At least some of the cells in one or more rows are adapted to provide the stent with increased flexibility.

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.

The application relates to a tension-controllable wire-feeding device for braiding a stent, which comprises a monitoring console, an automatic wire-feeding mechanism, a detection mechanism, a wire-feeding pen and a mold fixing block; the mold fixing block is used for placing or rotating a stent mold, and cooperates with the wire-feeding pen in a manual holding state to braid different waveform stents; a micro pressure sensor on the wire-feeding pen is located on a wire clamping block where a first handle and a second handle contact, is used for detecting pressure and transmitting a pressure value to the monitoring console for processing; the detection mechanism detects the apparent structure and wire winding curvature of the stent in real time, and is used for quality screening of the formed stent; the application realizes the man-machine cooperative braiding of the stent with controllable wire-feeding tension and controllable wire-feeding track with the aid of the detection mechanism, improves the traditional manual method of the manual braiding of the stent, and improves the production efficiency of the manual work and the quality of the stent.

The application discloses a thrombus taking device with a composite mesh structure, a support body of which adopts a woven structure and is arranged in a multi-segment structure and comprises a support outer layer and an inner layer. The outer layer is a large-mesh thrombus embedding structure, which is beneficial to the large thrombus to burst in to provide strong anchoring force and realize efficient embedding; the inner layer is a small-mesh leakage prevention structure, which is used for intercepting the thrombus fragments falling off in the thrombus taking process and preventing secondary embolism. The thrombus taking device takes into account the embedding and leakage prevention of the thrombus through the composite mesh structure, and the success rate and safety of thrombus taking are improved. The woven structure and the multi-segment design reduce the contact area and pulling damage of the support and the blood vessel wall, the soft spring arranged at the distal end can buffer the contact stress and reduce the risk of blood vessel intima damage. Meanwhile, the small-mesh independent unit of the inner layer, the multi-segment leakage prevention thrombus bundle port or the double-layer leakage prevention thrombus structure enhances the radial support force of the middle part of the woven support, guarantees the adhesion and embedding stability of the woven support in the tortuous blood vessel, avoids the displacement of the support or the falling off of the thrombus, and is beneficial to improving the prognosis of patients.

A delivery system for delivering a self-expandable braided stent is disclosed. The delivery system includes a handle containing a roller assembly. The roller assembly includes a roller, a base plate, a connecting shaft, and a slider block. The slider block is supported on the inner tube. The delivery system includes a hypotube fixedly coupled to the slider block and coaxially receiving the inner tube. The stent is mounted on the hypotube in a crimped state. An outer sheath is disposed over the hypotube to cover the stent. When the roller rotates, the slider block allows forward and rearward movement of the hypotube along a longitudinal axis 'x' over the inner tube relative to the outer sheath.

The invention discloses a hyperelastic Ti-Ni woven stent based on a selective laser melting forming technology and a preparation method of the hyperelastic Ti-Ni woven stent, and belongs to the technical field of stent manufacturing. The method comprises the following steps: S1, generating a printing model by utilizing modeling software according to a structure model determined by the woven stent; s2, slicing the printing model by utilizing slicing software to generate a printing file; s3, proportioning the material ball powder and adding the material ball powder into a laser forming printing device; s4, the laser forming printing device carries out printing according to the printing file; s5, annealing and quenching; s6, pickling, and removing a pickling solution after pickling to obtain a final bracket; in this way, the method is used for simply and rapidly manufacturing the superelastic Ti-Ni woven stent.

A hybrid braided stent includes a stent body (20). The stent body (20) is a single-layer structure. The stent body (20) is a tubular structure formed by interweaving a plurality of filaments. The end areas of at least two of the plurality of filaments are different.

The utility model discloses a knitting support for manual knitting, which comprises an adjusting and fixing mechanism and an adjusting plate mounted in the adjusting and fixing mechanism, a lifting mechanism is arranged at the bottom of the adjusting and fixing mechanism, a lifting footstock is arranged at the top of the lifting mechanism, and the adjusting and fixing mechanism comprises a supporting base. Fixing supports are symmetrically installed on one side of the supporting base, a first motor cover is fixedly installed on one side of the supporting base, an adjusting motor is fixedly installed on one side of the interior of the first motor cover, and the output end of the adjusting motor is fixedly connected with a first chain wheel transmission assembly. Through the characteristic that a first sliding block is in sliding connection with a vertical sliding frame, the position of the first sliding block can be adjusted, braided wires can be hung through the first sliding block, meanwhile, the braided wires can be clamped in an opening of an opening threaded column through the opening threaded column at the top of a second sliding block, and locking is conducted through a locking threaded sleeve; and the braided wire can be conveniently fixed.

A knitted stent extending along a central longitudinal axis may comprise a filament forming a plurality of cells arranged in a plurality of columns and a plurality of rows. The plurality of rows may extend parallel to the central longitudinal axis. The plurality of columns may extend circumferentially around the central longitudinal axis. The plurality of rows may include a plurality of loop rows and a plurality of rung rows interposed between adjacent loop rows. Each cell within the plurality of loop rows may include a circumferential loop element connected to two longitudinally oriented connector elements. The plurality of rung rows may include a plurality of circumferential rung elements connected to adjacent loop rows. A majority of the plurality of loop rows may include open cells having an open end. At least one of the plurality of loop rows may include a plurality of closed cells having a closed end.

The utility model relates to a kind of vein stents with high compliance, distal end braided stent is formed by wire with coating weaving, with high compliance, stent expanded diameter is slightly larger than target vein pipe diameter but smaller than proximal end laser engraved stent;Distal end braided stent includes wire, and coating located outside wire, coating is divided into inside coating and outside coating, inside coating curvature ratio is greater than outside coating, the surface roughness of inside coating is smaller than outside coating;A group of metal connecting short rod is connected by welding proximal end laser engraved stent and braided stent two parts.This stent has different structure and mechanical characteristics in different anatomical and kinematic characteristics vein segments, better adaptability, can better meet the needs of non-thrombotic iliofemoral vein stenosis occlusive disease patient iliofemoral vein stent implantation in stent fixation, cross joint placement stent.

Described herein is a braided stent having have a plurality of different segments that can reduce or eliminate foreshortening and allow the proximal end of the stent to more reliably open when deployed in a curved vessel. The segments can be connected together by interlocking loops positioned at the end of each segment and can be formed of one or more radially progressing wave patterns.