Reinforcement device for intrasaccular treatment of an aneurysm

A method of deploying a reinforcement device in an aneurysm, comprising:

• positioning a distal portion of a catheter into an aneurysm sack or an aneurysm neck of the aneurysm;
• deploying, via the catheter, a first mesh element in a reinforcement device into the aneurysm to at least partially cover the aneurysm neck of the aneurysm;
• deploying a second mesh element in the reinforcement device into the first mesh element, wherein the second mesh element is nested into the first mesh element;
• detaching a cable or a tube from the reinforcement device;
• and
• removing the catheter from the aneurysm sack or the aneurysm neck, wherein the first mesh element and the second mesh element in the reinforcement device are arranged in a sequence and are spatially offset from each other along a sequence direction,
• wherein a given mesh element comprises a sack having a mesh wall, an opening defined by a border, and an orientation along a normal direction perpendicular to the opening,
• wherein the first mesh element and the second mesh element are mechanically coupled by a connector having a length, and
• wherein the connector is configured to allow the orientation of the second mesh element to change, independent of the orientation of the first mesh element, by rotating about a longitudinal direction in a plane of the opening and perpendicular to the orientation.