Patent ID: 8920430
Filing Date: 2014-12-30
Classification: A61B,A61F

Abstract:
1. A method for treating a bifurcation or trifurcation aneurysm occurring on a first artery, the first artery and a second artery joining to a third artery, the method comprising: inserting a medical device such that it is at least partially located in the first artery and is at least partially located in the third artery; expanding the medical device from a first position to a second position, said medical device is expanded radially outwardly to the second position such that the exterior surface of said medical device engages with the inner surface of the first and third arteries so as to maintain a fluid pathway through said arteries; and positioning the medical device such that a membrane of the medical device is located against an aneurysm neck of the aneurysm to obstruct blood circulation to the aneurysm when the medical device is expanded to the second position, and at least a portion of the membrane is secured to the medical device to maintain the position of the membrane relative to the medical device when expanded to the second position; wherein the membrane is permeable and porous, the size of the pores of the membrane and the ratio of the material surface area of the membrane being such that blood supply to perforators and/or microscopic branches of main brain arteries is permitted to improve healing of the first artery but blood supply to the aneurysm is reduced.