Abstract: In a method, system and device for treating aneurysm a member is placed around the aneurysm, the aneurysm can be treated and monitored. The member can comprise a sensor placed in relation to a wall portion of the aneurysm for generating a signal corresponding to a parameter related to the aneurysm or the treatment of the aneurism. For example the size of the aneurysm such as the diameter of the aneurysm can be monitored. Hereby changes in the aneurism can be detected and information about the changes of the aneurysm can be used when determining how to treat the aneurysm.