17-04-2014 дата публикации
Номер: US20140107764A1
Принадлежит:
Arterius Ltd
A tubular stent ( 1 ) has first and second ends ( 2,3 ) and a longitudinal axis ( 4 ) therebetween. The tubular stent ( 1 ) is formed from a network of struts which defines a cylindrical surface about the longitudinal axis ( 4 ), the struts delineating a plurality of cells { 23, 30, 31, 32, 33 ) within the network, there being rows of cells parallel to the longitudinal axis ( 4 ). At least one cell in each row is a nodal cell ( 23 ). There is an increase in the maximum length parallel to the longitudinal axis ( 4 ) of cells from the at (east one nodal cell ( 23 ) to a first distal cell ( 30 ) in the row that is closer to the first or second end ( 2, 3 ) of the tubular stent ( 1 ). There is a second distal cell ( 31 ) in the row which has a different maximum length parallel to the longitudinal axis ( 4 ) from the nodal cell ( 23 ) and the first distal cell ( 30 ). The network of struts comprises a plurality of circumferential rings ( 6, 6′, 9, 9′, 13, 13′, 16, 16′, 17, 17 ′). Each ring ( 6, 6′, 9, 9′, 13, 13′, 16, 16′, 17, 17 ′) extends perpendicularly to the longitudinal axis ( 4 ) and the rings are located adjacent to each other parallel to the longitudinal axis ( 4 ) to define the cylindrical surface. The circumferential rings ( 6, 6′, 9, 9′, 13, 13′, 16, 16′, 17, 17 ′) are of a wave form. Each circumferential ring ( 6, 6′, 9, 9′, 13, 13′, 16, 16′, 17, 17 ′) has an amplitude parallel to the longitudinal axis ( 4 ), such that each wave form comprises a plurality of peaks ( 7, 10, 14, 18, 20 ) which extend towards the axial centre ( 5 ) of the tubular stent ( 1 ) and a plurality of troughs ( 8, 12, 29, 21, 36 ) which extend away from the axial centre ( 5 ) of the tubular stent ( 1 ).
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