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 Prism Tripod includes a planar base including a supported portion and a cantilever portion. Preferably the base includes a cantilever axis, and a point axis, wherein the cantilever axis within the cantilever portion and the point axis within the supported portion. The prism tripod including at least three legs supporting the base and a laser holder for supporting a locating device and a laser. The base is adapted to demountably receive the laser holder along the cantilever axis, wherein the laser and locating device mounted along the cantilever axis.
摘要:
A mold for forming a balloon of a balloon catheter including a body portion defining a body region of a mold cavity and distal and proximal end caps defining tapering regions and neck regions of the mold cavity. During the molding process, the mold cavity is visible from an exterior surface of the body portion, which is transparent or translucent. The distal and proximal end caps are metal and can be precision machined in the tapering and neck regions of the mold cavity in order to achieve more accurate molded balloon dimensions. Also disclosed is a method for making a balloon of a balloon catheter using the mold and a balloon made therefrom.
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 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 particle embedded polymer stent and method of manufacture, which includes a stent delivery system having a catheter; a balloon operably attached to the catheter; and a polymer stent disposed on the balloon, the stent comprising struts interconnected to form a tubular body. Each of the struts includes in cross section a drug-free core region; and a drug region surrounding and immediately adjacent to the core region, the drug region including drug particles. The drug-free core region and the drug region are made of a single polymer, the single polymer having a drug-safe softening temperature.
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.