Longitudinally Flexible Expandable Stent

Abstract

Segmented articulatabte stent of open structure comprised of end-connected struts of first and second lengths making up first and second segments with angular interconnects between adjacent first and second segments.

What is claimed is: 
     
         1 . An expandable stent, comprising:
 a plurality of first continuous substantially repeating patterns coursing along the stent in a helical manner and each consisting of a plurality of first circumferential segments alternating with a plurality of interconnecting constituents of the stent, the interconnecting constituents joining two or more other constituents of the stent,   each first circumferential segment having five linear struts connected to each other by four curved portions and being a contiguous element coursing in a circumferential manner about the stent and spanning between two interconnecting constituents; and   a plurality of second continuous substantially repeating patterns coursing along the stent in a helical manner and each consisting of a plurality of second circumferential segments alternating with the plurality of interconnecting constituents, wherein the other constituents include first and second circumferential segments,   each second circumferential segment having three linear struts connected to each other by two curved portions and being a contiguous element coursing in a circumferential manner about the stent and spans between two interconnecting constituents,   wherein a plurality of the first circumferential segments are connected to a plurality of the second circumferential segments to define a plurality of adjacent cylindrical band-like elements, the cylindrical band-like elements being contiguous patterns forming cylinders around a longitudinal axis of the stent.   
     
     
         2 . The stent of  claim 1 , wherein the stent is in an unexpanded state. 
     
     
         3 . The stent of  claim 1 , wherein the stent is in an expanded state. 
     
     
         4 . The stent of  claim 1 , wherein the curved portions of at least two adjacent cylindrical band-like elements are circumferentially offset from one another. 
     
     
         5 . The stent of  claim 1 , wherein each cylindrical band-like element defines a cylindrical ring. 
     
     
         6 . The stent of  claim 1 , wherein at least one of the interconnecting constituents forms an angle with respect to the longitudinal axis. 
     
     
         7 . The stent of  claim 6 , wherein the at least one interconnecting constituent forms an angle less than approximately 45 degrees with respect to the longitudinal axis. 
     
     
         8 . The stent of  claim 6 , wherein the at least one interconnecting constituent forms an angle of at least approximately 14 degrees with respect to the longitudinal axis. 
     
     
         9 . The stent of  claim 1 , further comprising first and second end segments straddling a main body of the stent. 
     
     
         10 . An expandable stent, comprising:
 a first continuous substantially repeating pattern coursing along the stent in a helical manner and consisting of a plurality of first circumferential segments alternating with a plurality of interconnecting constituents of the stent, the interconnecting constituents joining two or more other constituents of the stent,   each first circumferential segment having five linear portions connected to each other by four curved portions and being a contiguous element coursing in a circumferential manner about the stent and spanning between two interconnecting constituents;   a second continuous substantially repeating pattern coursing along the stent in a helical manner and consisting of a plurality of second circumferential segments alternating with the plurality of interconnecting constituents, wherein the other constituents include first and second circumferential segments,   each second circumferential segment having three linear portions connected to each other by two curved portions and being a contiguous element coursing in a circumferential manner about the stent and spans between two interconnecting constituents; and   a plurality of adjacent cylindrical band-like elements, each cylindrical band-like element including at least one of the first circumferential segments and at least one of the second circumferential segments,   wherein the cylindrical band-like elements are contiguous patterns forming cylinders around a longitudinal axis of the stent.   
     
     
         11 . The stent of  claim 10 , wherein the first continuous substantially repeating pattern defines a pitch different from a pitch defined by the second continuous substantially repeating pattern. 
     
     
         12 . The stent of  claim 10 , wherein the stent is in an unexpanded state. 
     
     
         13 . The stent of  claim 10 , wherein the first continuous substantially repeating pattern crosses the second continuous substantially repeating pattern. 
     
     
         14 . The stent of  claim 10 , wherein the curved portions of at least two adjacent cylindrical band-like elements are circumferentially offset from one another. 
     
     
         15 . The stent of  claim 10 , wherein at least one of the interconnecting constituents forms an angle with respect to the longitudinal axis. 
     
     
         16 . The stent of  claim 10 , further comprising first and second end segments straddling a main body of the stent. 
     
     
         17 . An expandable stent, comprising:
 a first continuous substantially repeating pattern coursing along the stent in a helical manner and consisting of a plurality of first circumferential segments alternating with a plurality of interconnecting constituents of the stent, the interconnecting constituents joining two or more other constituents of the stent,   each first circumferential segment having five linear segments connected to each other by four curved portions and being a contiguous element coursing in a circumferential manner about the stent and spanning between two interconnecting constituents,   the first continuous substantially repeating pattern defining a first pitch;   a second continuous substantially repeating pattern coursing along the stent in a helical manner and consisting of a plurality of second circumferential segments alternating with the plurality of interconnecting constituents, wherein the other constituents include first and second circumferential segments,   each second circumferential segment having three linear segments connected to each other by two curved portions and being a contiguous element coursing in a circumferential manner about the stent and spanning between two interconnecting constituents,   the second continuous substantially repeating pattern defining a second pitch different from the first pitch; and   a plurality of adjacent cylindrical band-like elements, each cylindrical band-like element including at least one of the first circumferential segments and at least one of the second circumferential segments,   
       wherein the cylindrical band-like elements are contiguous patterns forming cylinders around a longitudinal axis of the stent. 
     
     
         18 . The stent of  claim 17 , where each of the plurality of interconnecting constituents is angled with respect to the longitudinal axis. 
     
     
         19 . The stent of  claim 17 , wherein each cylindrical band-like element defines a cylindrical ring.