Devices and Methods for Occluding a Cerebral Aneurysm

摘要

This invention is a device to occlude a cerebral aneurysm which includes: a longitudinal lumen that is inserted into the parent blood vessel of an aneurysm; a flexible expandable member (such as a net or mesh) which is expanded within the aneurysm sack by the insertion of embolic members into that flexible expandable member; and a resilient expandable member (such as a cylindrical stent or ring stent) that is attached to a central portion of the flexible expandable member and expanded within the aneurysm sack in order to keep the flexible expandable member from slipping out of the aneurysm sack.

主权项

1. A device to occlude an aneurysm comprising:
a longitudinal lumen that is configured to be inserted into a blood vessel; a flexible expandable member that is configured to travel through the longitudinal lumen, be inserted into an aneurysm, and then be expanded within the aneurysm sack; wherein this flexible expandable member is sufficiently flexible to substantively conform to the contours of the walls of the aneurysm sack after the flexible expandable member is expanded within the aneurysm; a resilient expandable member that is configured to travel through the longitudinal lumen, be inserted into the aneurysm, and then be expanded within the aneurysm sack; wherein this resilient expandable member resists contraction after it has been expanded; and wherein expansion of the resilient expandable member resiliently holds a central portion of the flexible expandable member so that the flexible expandable member does not slip out of the aneurysm sack; and a plurality of individual embolic members that are configured to travel through the longitudinal lumen, be inserted into the flexible expandable member within the aneurysm, and accumulate within the flexible expandable member; wherein the flexible expandable member does not allow the embolic members to escape out from the flexible expandable member; and wherein accumulation of the plurality of embolic members inside the flexible expandable member causes the flexible expandable member to expand.