| 摘要 |
A stent, in particular a coronary stent, for expansion from a first condition into an expanded second condition in which it holds a vessel in an expanded state, comprising a tubular body whose peripheral surface ( 1 ) is formed by a number of support portions ( 2 ) which extend in the longitudinal direction of the stent and which comprise bar elements ( 3 ) which are connected by way of connecting bars ( 4 ), wherein there is provided a number of support portion groups ( 1.1 ) with at least a first support portion ( 2.1 ) and a second support portion ( 2.2, 2.3 ) in adjacent relationship in the peripheral direction of the stent, whose bar elements ( 3.1, 3.2, 3.3 ) extend in a meander configuration in the longitudinal direction of the stent, and wherein the first engagement points ( 4.1, 4.2 ) of first connecting bars ( 4 ) engage the first support portion ( 2.1 ) and the second engagement points ( 4.2, 4.4 ) of the first connecting bars ( 4 ) engage the second support portion ( 2.2, 2.3 ), wherein the first and second engagement points ( 4.1, 4.3, 4.2, 4.4 ) of the first connecting bars ( 4 ) are spaced from each other in the longitudinal direction of the stent and the first connecting bars ( 4 ) are of such a configuration and arrangement that the spacing between the first and second engagement points ( 4.1, 4.3, 4.2, 4.4 ) of the first connecting bars ( 4 ) in the longitudinal direction of the stent changes upon expansion of the stent to compensate for the reduction in length of the support portions. |
