摘要:
An endovascular prosthesis that includes a stent and a woven graft material. The stent is connected to the graft material by direct attachment of the stent to the graft material at thermoplastically fused regions of the graft material.
摘要:
An endovascular prosthesis that includes a stent and a woven graft material. The stent is connected to the graft material by direct attachment of the stent to the graft material at thermoplastically fused regions of the graft material.
摘要:
A variable curvature stent limb is disclosed herein. A stent derived from a plurality of these variable curvature stent limbs may be highly compressible, such that it is compatible with a low-profile delivery device. This stent may be useful over a wider range of body vessel diameters and may possess a greater fatigue life, since this stent may provide a more controlled constant radial force.
摘要:
An attachment system for attaching an intravascular device to a vessel wall of a body vessel is disclosed. The attachment system includes an intravascular device and biological attachment material connected to the intravascular device. The biological attachment material is configured to attach the intravascular device to the vessel wall.
摘要:
An attachment system for attaching an intravascular device to a vessel wall of a body vessel is disclosed. The attachment system includes a tubular expandable body defining a lumen therethrough. The tubular expandable body is configured to move between an expanded state to contact the body vessel and a collapsed state for delivery or retrieval. The tubular expandable body is configured to contact the vessel wall along the length of the tubular expandable body in the expanded state when deployed in the body vessel. An intravascular device is held to the exterior side of the tubular expandable body and is configured to contact the vessel wall when the tubular expandable body is in the expanded state and the system is deployed within a body vessel.
摘要:
A self-expanding or otherwise expandable artificial valve prostheses for deployment within a body passageway, such as a vessel or duct of a patient. The valve prostheses include a support structure having an outer frame, a supporting member and a valve leaflet. The portion of the valve leaflet is supported by the supporting member and is positioned away from the wall of the body passageway when the device is deployed within the body passageway.
摘要:
An attachment system for attaching an intravascular device to a vessel wall of a body vessel is disclosed. The attachment system has an intravascular device having a first end and a second end. The intravascular device defines a longitudinal axis along a length thereof. Several struts are connected to one or more ends of the intravascular device. Each strut is configured to move along a strut path relative to the longitudinal axis between an expanded state for engaging the vessel wall and a collapsed state for delivery or retrieval. Each strut has a free end configured to engage the vessel wall in the expanded state.
摘要:
A stent for use in a medical procedure having opposing sets of curved apices, where the curved section of one set of apices has a radius of curvature that is greater than the curved section of the other set of apices. One or more such stents may be attached to a graft material for use in endovascular treatment of, for example, aneurysm, thoracic dissection, or other body vessel condition.
摘要:
A hybrid stent (100) includes at least one resilient ring (105) comprising a superelastic wire (102) formed in a sinusoidal pattern of alternating crests (110) and troughs (115) about a circumference of the ring (105). A plurality of malleable cannula segments (120) overlie the superelastic wire at the crests and troughs. Each of the cannula segments (120) includes a bend (125) and has an inner diameter sized to allow relative motion between the wire (102) and the cannula segment (120). The hybrid stent (100) may also include a plurality of gaps (130), where each gap (130) is defined by a spacing between opposing cannula segments (120). Deformation of the malleable cannula segments (120) dominates a response of the stent to substantially uniform radial forces, and deformation of the resilient ring (105) dominates a response of the stent to radially nonuniform crushing forces.
摘要:
Various stents and stent-graft systems for treatment of medical conditions are disclosed. In one embodiment, an exemplary stent-graft system may be used for endovascular treatment of a thoracic aortic aneurysm. The stent-graft system may comprise proximal and distal components, each comprising a graft having proximal and distal ends, where upon deployment the proximal and distal components at least partially overlap with one another to provide a fluid passageway therebetween. The proximal component may comprise a proximal stent having a plurality of proximal and distal apices connected by a plurality of generally straight portions, where a radius of curvature of at least one of the proximal apices may be greater than the radius of curvature of at least one of the distal apices. The distal component may comprise a proximal z-stent coupled to the graft, where the proximal end of the graft comprises at least scallop formed therein that generally follows the shape of the proximal z-stent. Further, the distal component may comprise at least one z-stent stent coupled to the distal end of the graft and extending distally therefrom that reduces proximal migration of the distal component.