摘要:
A tubular stent includes cylindrical rings disposed adjacent to each other and coupled to each other by a plurality of longitudinal segments. Each cylindrical ring includes circumferentially oriented toggle lock struts. The toggle lock struts include a first arm and a second arm coupled together at an elbow. When the stent is in a compressed configuration for delivery, the toggle lock struts are bent at the elbow such that the first arm is disposed at an angle of less than 180 degrees relative to the second arm. Upon radial expansion of the stent, the toggle lock struts are unbent to a straight configuration and permitted to relax slightly beyond the straight configuration to a locked configuration such that the angle between the first arm and the second arm changes from less than 180 degrees to more than 180 degrees.
摘要:
A tubular stent includes cylindrical rings disposed adjacent to each other and coupled to each other by a plurality of longitudinal segments. Each cylindrical ring includes circumferentially oriented toggle lock struts. The toggle lock struts include a first arm and a second arm coupled together at an elbow. When the stent is in a compressed configuration for delivery, the toggle lock struts are bent at the elbow such that the first arm is disposed at an angle of less than 180 degrees relative to the second arm. Upon radial expansion of the stent, the toggle lock struts are unbent to a straight configuration and permitted to relax slightly beyond the straight configuration to a locked configuration such that the angle between the first arm and the second arm changes from less than 180 degrees to more than 180 degrees.
摘要:
A catheter and a guidewire exchange system includes a catheter and a guide member. The catheter includes a lumen extending through the shaft and sized to receive the guidewire, and a longitudinal guideway enabling transverse access from the shaft exterior surface to the lumen. The guide member includes a housing, a catheter passageway extending through the housing and adapted to slidably receive the catheter, a guidewire passageway extending from one end of the housing into the catheter passageway and including a tube adapted to merge the guidewire transversely through the guideway and into the first lumen, and an fluid flow reduction body that is positioned in the guidewire passageway and impedes fluid flow therethrough.
摘要:
A catheter and guide wire exchange system including a catheter that has a guide wire lumen with a guide way extending along a length of the proximal shaft. A guide member is slidably disposed about the proximal shaft for directing a guide wire into or out of the guide way and the guide wire lumen. A transition section joins the trilumen proximal shaft to a coaxial distal shaft.
摘要:
A catheter and guide wire exchange system including a catheter having a guide wire lumen with a guide way extending along the length of a stiffened proximal shaft portion, and a guide member slidably disposed about the proximal shaft for directing a guide wire into or out of the guide way and the guide wire lumen. The guide member may be slid along the proximal shaft portion and the guide wire in zipper-like fashion so that the guide wire is contained within the guide wire lumen distal to the guide member and with the guide wire and catheter being separated proximal of the guide member.
摘要:
A covered stent including an endovascular implant having a polymeric stent structure with an integrally formed membrane-like graft component, also referred to as a stent-graft, and methods of manufacturing the one-piece stent-graft by an injection molding process. A molding system for creating the polymeric stent structure is injected with a melt stream of moldable material that is forced between a parting line of the molding system to create a thin, flexible membrane-like structure within the open areas or interstitial spaces of the molded stent structure. The stent-graft so created is a one-piece, unified structure molded from a polymeric material in a single manufacturing step.
摘要:
A rapid exchange catheter includes an exchange joint that is coupled between a proximal shaft and first and second distal shafts. The exchange joint includes a proximal end that is configured to be coupled to the proximal shaft, and a distal end that is configured to be coupled to the first distal shaft and the second distal shaft. The distal end includes a first portion that includes a first guidewire lumen, and a second portion that includes a second guidewire lumen. The exchange joint also includes a guidewire port that is configured to provide access for a first guidewire into the first distal inner lumen via the first guidewire lumen and a second guidewire into the second distal inner lumen via the second guidewire lumen.
摘要:
A delivery system for a stent includes a catheter having an elongated inner member and at least one flexible, longitudinally oriented outer member that is operably attached to the distal portion of the inner member. A stent is placed concentrically around the flexible outer member, near the distal end of the catheter. When the elongated inner member is retracted, the flexible outer member folds longitudinally adjacent to the lumen of the stent causing the stent to be deployed. Another aspect according to the invention provides a method for delivering a stent to a treatment site within the vascular system.
摘要:
A covered stent including an endovascular implant having a polymeric stent structure with an integrally formed membrane-like graft component, also referred to as a stent-graft, and methods of manufacturing the one-piece stent-graft by an injection molding process. A molding system for creating the polymeric stent structure is injected with a melt stream of moldable material that is forced between a parting line of the molding system to create a thin, flexible membrane-like structure within the open areas or interstitial spaces of the molded stent structure. The stent-graft so created is a one-piece, unified structure molded from a polymeric material in a single manufacturing step.
摘要:
A method of making a polymeric stent includes providing a molding apparatus including a central core pin and a plurality of slides, wherein each of the slides includes grooves on an inner surface the slide, wherein the grooves are formed in the shape of the stent. A molten polymer is injected into the grooves and allowed to solidify. The slides are moves away from the central core pin and the solidified polymer, in the shape of a stent, is removed. The central core also may or may not include corresponding grooves depending on the desired cross section of struts and crowns of the stent.