| 摘要 |
An endovascular stent system (10) includes first and second generally tubular stents members (20, 22), which are shaped so as to define first and second interface sections (40, 42), respectively, which are securely coupleable to each other. The first interface section (40) is shaped so as to define an opening (44). The second interface section (42) is shaped so as to define a neck portion (50). When the first and second stent members (20, 22) are coupled together, the neck portion (50) is at least in part defined by: (a) first ones (72) of structural elements (70), positioned at respective first circumferential locations, which are configured to apply, to the opening (44), distally- and radially-outwardly-directed forces, without applying any proximally-directed forces, and (b) separate from the first structural elements (72), second ones (74) of the structural elements (70), positioned at respective second circumferential locations different from the first circumferential locations, which are configured to apply, to the opening (44), a proximally- and radially-outwardly-directed forces, without applying any distally-directed forces. |
| 主权项 |
1. Apparatus comprising a multi-component endovascular stent system, which comprises first and second generally tubular stents members, which (a) are configured to assume respective radially-compressed states for transluminal delivery, and respective radially-expanded states for intraluminal fixation, and (b) comprise structural elements, wherein the second stent member has proximal and distal ends,
wherein the first and the second stent members are shaped so as to define first and second interface sections, respectively, which are securely coupleable to each other when the first and the second stent members are in their respective radially-expanded states, wherein the first interface section is shaped so as to define an opening having a structural circumference defined by one or more of the structural elements of the first stent member, wherein the second interface section is shaped so as to define a neck portion longitudinally flanked by proximal and distal portions, which neck portion is generally radially narrower than the proximal and the distal portions, wherein, when the first and the second stent members are coupled together in their respective radially-expanded states, the neck portion is at least in part defined by:
first ones of the structural elements of the second stent member, which are positioned at respective first circumferential locations, wherein each of at least a portion of the first structural elements longitudinally spans the structural circumference, and is configured to apply, to the structural circumference of the first interface section, a distally- and radially-outwardly-directed force, without applying any proximally-directed force, andseparate from the first structural elements, second ones of the structural elements of the second stent member, which are positioned at respective second circumferential locations different from the first circumferential locations, wherein each of at least a portion of the second structural elements longitudinally spans the structural circumference, and is configured to apply, to the structural circumference of the first interface section, a proximally- and radially-outwardly-directed force, without applying any distally-directed force, and wherein all of the first circumferential locations are circumferentially offset from all of the second circumferential locations. |
