Endoluminal stent
View Patent ↗An endoluminal stent ( 100 ) is described herein. In an embodiment, the endoluminal stent ( 100 ) includes a plurality of sinusoidal-shaped expandable ringlets ( 102 ) provided in parallel to form a tubular structure of the endoluminal stent ( 100 ). Further, adjacent ringlets ( 102 ) can be connected to each other by one or more asymmetrical offset connectors ( 108 ), the offset connectors ( 108 ) being non-linear in structure.
1. An endoluminal stent comprising:
a plurality of ringlets forming a lateral surface of the endoluminal stent, each of the plurality of ringlets having a sinusoidal structure along a length of the ringlet, wherein the sinusoidal structure is formed as contained in a cylindrical plane of the lateral surface of the endoluminal stent, wherein the plurality of ringlets are coaxial to each other and are provided along a central longitudinal axis; and
a plurality of connectors to couple adjacent ringlets, wherein one end of each corresponding connector of the plurality of connectors is coupled to one ringlet at a first junction and another end of the corresponding connector is coupled to an adjacent ringlet at a second junction, wherein an axis passing through the first junction and parallel to the central longitudinal axis is at an offset with respect to another axis passing through the second junction and parallel to the central longitudinal axis, wherein each of the plurality of connectors is of sinusoidal structure and at least one radius in the sinusoidal structure, being measured at a point at least halfway to a midpoint of a corresponding connector, is in a range of 0.4 mm to 0.7 mm,
wherein, for each corresponding connector, the first junction is located at a mid-portion of a connecting element that connects ends of two crown peaks that are oriented in opposite directions in the one ringlet and the second junction is located at a mid-portion of another connecting element that connects ends of two crown peaks that are oriented in opposite directions in the adjacent ringlet.
2. The endoluminal stent as claimed in claim 1 , wherein each of the plurality of ringlets comprise:
a plurality of arc-shaped first crowns; and
a plurality of arc-shaped second crowns, each of the plurality of arc-shaped first crowns and the arc-shaped second crowns having a first end and a second end and an orientation of the plurality of arc-shaped first crowns being opposite to the orientation of the plurality of arc-shaped second crowns.
3. The endoluminal stent as claimed in claim 1 , wherein the plurality of ringlets is made of a metal, a metal alloy, a biodegradable polymer, a biostable polymer, and any combination thereof.
4. The endoluminal stent as claimed in claim 1 , wherein the plurality of connectors are flexible.
5. The endoluminal stent as claimed in claim 1 , wherein material for making ringlets is selected from, but not limited to Stainless steel, Tantalum, Niobium, Magnesium alloys, Zinc alloys, L605, MP25N, Nitinol or a combination of thereof.
6. The endoluminal stent as claimed in claim 1 , wherein material for making ringlets is selected from, but not limited to L-lactide, Glycolide or combinations of thereof, poly(hydroxybutyrate), polyorthoesters, poly anhydrides, poly(glycolic acid), poly(glycolide), poly(L-lactic acid), poly(L-lactide), poly(D-lactic acid), poly(D-lactide), poly(caprolactone), poly(trimethylene carbonate), polyester amide, polyesters, polyolefins, polycarbonates, polyoxymethylenes, polyimides, polyethers, and copolymers and combinations thereof.
7. The endoluminal stent as claimed in claim 1 , has a coating selected from a biodegradable polymer coating, a biostable polymer coating, a passive coating, a therapeutic agent coating or a combination of thereof.