摘要:
The invention relates to a suction stent for introduction into a hollow organ of the human or animal body, preferably into the gastrointestinal tract, in particular the intestine, comprising a tubular hollow body which is open in the longitudinal direction and made of biocompatible material, the tubular hollow body having a fixed diameter at least in its central portion; and a porous shapeable material, preferably a sponge material, which is biocompatible and shapeable in the radial direction, the porous shapeable material radially sheathing the tubular hollow body at least in a section of the tubular hollow body. Further, the invention relates to a method for sealing a leakage, especially an anastomosis, of the hollow organ.
摘要:
A stent-graft system includes a graft member (30) and separate coupling stent (50) that are adapted to be delivered separately to a location within a patient's body where they are coupled to form a stent-graft composite in-situ. The system thus allows for serial introduction of the graft member (30) and coupling stent through an introducer sheath (10) providing access to the location, instead of being delivered as the composite assembly together, thus allowing substantially reduced size of the introducer sheath (10). Particular embodiments provide highly beneficial improvements for treating AAA's, allowing for Seldinger puncture access techniques versus the conventional highly invasive "cut down" access procedures required by conventional pre-formed AAA stent-graft composite systems.
摘要:
A method, and related composition and apparatus for repairing a tissue site. The method involves the use of a curable polyurethane biomaterial composition having a plurality of parts adapted to be mixed at the time of use in order to provide a flowable composition and to initiate cure. The flowable composition can be delivered using minimally invasive means to a tissue site and there fully cured provide a permanent and biocompatible prosthesis for repair of the tissue site. Further provided are a mold apparatus, e.g., in the form of a balloon or tubular cavity, for receiving a biomaterial composition, and a method for delivering and filling the mold apparatus with a curable composition in situ to provide a prosthesis for tissue repair.
摘要:
This invention is an intraluminal grafting stent (10) that includes a collapsible tube member (12) having a first end (14) and a second end (16). An outer wall (18) and an inner wall (20) extend between the ends. A first end wall (22) and a second end wall (24) extend between the outer wall and the inner wall. The outer, inner, first end and second end walls form a chamber (26). A permeable film layer (30) extends between the first end wall and the second end wall in the chamber. The film layer, outer wall, and end walls define a space (32). A composite material (34) is positioned in the chamber between the inner wall and the permeable film layer. An opening (40) is positioned in one of the end walls to allow for the introduction of a reagent (60) into the defined space. The reagent reacts with the composite material to cause the composite material to harden after the stent has been positioned in a blood vessel.
摘要:
A method and apparatus for molding polymeric structures in vivo is disclosed. The structures comprise polymers that may be heated to their molding temperature by absorption of visible or near-visible wavelengths of light. By providing a light source that produces radiation of the wavelength absorbed by the polymeric material, the material may be selectively heated and shaped in vivo without a corresponding heating of adjacent tissues or fluids to unacceptable levels. The apparatus comprises a catheter (10) having a shaping element (12) positioned near its distal end. An emitter (15) provided with light from at least one optical fiber (18) is positioned within the shaping element. The emitter serves to provide a moldable polymeric article (19) positioned on the shaping element with a substantially uniform light field, thereby allowing the article to be heated and molded at a desired treatment site in a body lumen.
摘要:
Methods and devices for treating a luminal pathology affecting an anatomical lumen of a patient comprising forming, in situ, a continuous cohesive layer of covalently-crosslinked hydrogel in a luminal wall of the anatomical lumen.
摘要:
A delivery system for forming a stent in-situ may comprise an elongate shaft having a proximal end and a distal end and a lumen extending from the proximal end towards the distal end of the elongate shaft. A plurality of apertures may be positioned adjacent to a distal end region of the elongate shaft. The plurality of apertures may extend from an outer surface to an inner surface of the elongate shaft and be in fluid communication with the lumen. A port may be affixed to the proximal end of the elongate shaft and in fluid communication with the lumen.
摘要:
Disclosed herein is a unique family of medical implants which are engineered outside of a subject's body into a form which may be manipulated in vivo. The implants comprise a region of at least one weldable material which allows welding of the implant to a polymeric material introduced into the body prior to, together with or after the implant has been positioned.
摘要:
Novel medical devices and uses thereof for lining a blood vessel and/or treating an aneurysm are disclosed herein. The device comprises a non-metallic expandable tubular structure, implantable in a body vessel and being made, at least in part, from a polymeric system characterized by a stiffness which changes upon stimulation under physiological conditions. Novel polymeric systems are further disclosed herein, which are configured to produce a polymeric material upon stimulation under physiological conditions, such that a stiffness of said polymeric material is higher than a stiffness of said system. Uses of polymer systems in the manufacture of a device are further disclosed.