| abstract |
An occlusion system (10) treats an aneurysm (16) in a parent vessel (14). The parent vessel (14) defines a lumen (12) that has a lumen wall. The aneurysm (16) has a neck (18) in communication with the lumen (12). The occlusion system (10) includes a stent configured for deployment in the parent vessel (14). The stent has at least a first portion (20) and a second portion (22). The first portion (20) is permeable to blood flow and is arranged such that, when the stent is deployed, the first portion (20) is spaced from the neck (18) of the aneurysm (16). The second portion (22) is less permeable to blood flow than the first portion (20) and is arranged such that, when the stent is deployed, the second portion (22) overlies the neck (18) of the aneurysm (16). |