摘要:
An endoprothesis comprising a bioerodible body having local erosion rates of the body that vary as a continuous function of radial distance from the longitudinal axis.
摘要:
A stent comprises a plurality of circumferential bands. Circumferential bands which are adjacent one another are connected one to the other. The circumferential bands include peaks and troughs interconnected by bent struts. The bands may overlap or may be connected by connectors.
摘要:
In one embodiment of the invention, a stent may be provided comprising a first undulating band having alternating peaks and troughs, a second undulating band having alternating peaks and troughs, a first substantially longitudinal connector extending between the first and second undulating bands and a second very short connector extending between the first and second undulating bands, the first connector substantially longer than the second very short connector.
摘要:
A platinum enhanced radiopaque alloy particularly suitable for manufacture of implantable and/or intravascular medical devices. A stent is one preferred medical device which is a generally tubular structure that is expandable upon implantation in a vessel lumen to maintain flow therethrough. The stent is formed from the alloy which has improved radiopacity relative to present utilized stainless steel alloys. This alloy preferably contains from about 2 wt. % to about 50 wt. % platinum; from about 11 wt. % to about 18 wt. % chromium; about 5 wt. % to about 12 wt. % nickel and at least about 15 wt. % iron.
摘要:
A stent defines a plurality of holes with a therapeutic agent deposited therein and has a plurality of members where at least some of the members overlap when the stent is in the unexpanded state
摘要:
The present invention provides an apparatus and method for manufacturing polymeric thin-walled tubular members, which are well-suited for use as vascular grafts. The apparatus of the present invention enables extrusion of a tubular member having an extremely thin wall thickness so as to facilitate passage through tortuous vascular passageways. The apparatus achieves uniform wall thickness in a tubular member by establishing and maintaining axial alignment of a ram having a concentrically disposed guide rod therein with a die supported in concentric relation to the guide rod.
摘要:
A stent comprises a plurality of axially spaced serpentine bands. Each serpentine band has a proximal and distal end and consists of a plurality of interconnected struts. The struts are of substantially the same length. Serpentine bands which are adjacent one another are connected one to the other. The stent further comprises a plurality of wishbone connectors. Each wishbone connector connects two serpentine bands which are adjacent one another. The wishbone connectors have an elongate portion which is disposed between the two serpentine bands and does not overlap longitudinally with either of the two serpentine bands. The elongate portion has a proximal end and a distal end. The proximal end has two legs extending therefrom to one of the two serpentine bands and the distal end has two legs extending therefrom to the other of the two serpentine bands. At least one wishbone connector connects serpentine bands which are adjacent one another.