Serpentine coiled ladder stent
OwnerJacob Richter, Gregory Pinchasikinventors
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Abstract
A serpentine coiled ladder stent is provided, in which the coil is formed from a wound strip of cells, wherein the sides of the cells are serpentine. Thus, the stent is comprised of a strip helically wound into a series of coiled windings, wherein the strip is formed of at least two side bands connected to each other, for example by a series of cross struts. The cross struts may be positioned slightly askew. Each side band is formed in a serpentine pattern comprising a series of bends, wherein upon expansion of the stent, the bends of the side bands open to increase the length of each of the individual cells in the helical direction, thereby lengthening the strip in the helical direction to allow the stent to expand without any significant unwinding of the strip.
Claims20
A stent comprised of a strip helically wound into a series of coiled windings, the strip having a longitudinal axis, wherein the strip has at least two side bands, wherein each of the at least two side bands is formed in a serpentine pattern comprising a series of bends, wherein the at least two side bands of the strip are connected to each other by cross struts, wherein the cross struts are not perpendicular to the longitudinal axis of the strip, and wherein upon expansion of the stent, the bends of the at least two side bands open to lengthen the strip in the helical direction to allow the stent to expand without any significant unwinding of the strip.
A strip used to form a helically wound stent, comprising
- at least two side bands formed in a serpentine pattern;
- and
- cross struts connecting the side bands, wherein the cross struts are slightly askew to a direction perpendicular to a longitudinal axis of the strip.
A stent comprised of a strip helically wound into a series of coiled windings, wherein the strip is formed from a series of square cells, and wherein in the unexpanded state, the sides of the square cells are collapsed to form a serpentine continuum.
Dependencies are inferred from the claim text.