Medical device
AssigneeMerlin Md Pte Ltd.
InventorsLeon Rudakov, Michael O'Connor, Deepak Gandhi
Life of this patent
Estimating the term…
Abstract
A method for treating an aneurysm can include inserting a medical device partially in a first artery and partially in a third artery. The device can be expanded radially outwardly from a first position to a second position to engage an inner surface of the first artery and an inner surface of the third artery, so as to maintain a fluid pathway through said arteries. Further, the device can be positioned such that, when the device is in the second position, a porous membrane of the device is located at a neck of the aneurysm.
Claims21
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 into the first and third arteries;
- radially expanding the medical device into apposition with inner surfaces of the first and third arteries;
- and
- positioning the medical device such that when expanded, a membrane of the medical device is located against a neck of the aneurysm to obstruct blood flow into the aneurysm, the membrane being secured to the medical device to maintain the position of the membrane relative to the medical device;
- 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.
A method for treating a bifurcation or trifurcation aneurysm, in a patient, occurring at a first artery, the first artery and a second artery joining to a third artery, the method comprising:
- inserting a medical device into the first artery and the third artery, the medical device comprising an expandable latticework frame having first and second struts that each define a radially outermost edge, a radially innermost edge, a circumferential strut width, and a wall thickness between the radially outermost and innermost edges, the medical device further comprising a porous membrane that extends around and between the first and second struts, the membrane having a single sheet web portion that, between the first and second struts, extends only within a central region being (i) bounded radially between the radially outermost edges and the radially innermost edges of the first and second struts and (ii) bounded circumferentially between the first and second struts, the web portion defining a web thickness that is less than the wall thickness of the first or second struts;
- radially expanding the device into apposition with inner surfaces of the first and third arteries so as to maintain a fluid pathway through said arteries;
- and
- positioning the device such that, when expanded, the porous membrane is located at a neck of the aneurysm;
- wherein the membrane is configured to (i) reduce blood supply into the aneurysm, and (ii) permit blood supply through pores of the membrane and into perforators and/or microscopic branches of the first artery so as not to inhibit blood supply functions of the perforators and/or microscopic branches.
A method for treating an aneurysm, in a patient, the method comprising:
- inserting a medical device in a first vessel, the medical device comprising (i) an expandable latticework frame having first and second struts that each define an axial strut width, a radially outermost edge, a radially innermost edge, and a wall thickness defined between the radially outermost edge and the radially innermost edge, and (ii) a comprises a single sheet porous membrane attached to the frame and extending circumferentially, between the first and second struts, only in a central region being (i) bounded circumferentially between the radially outermost edges and the radially innermost edges of the first and second struts and (ii) bounded axially between the first and second struts, a thickness of the membrane in the central region being less than the wall thickness of the first or second struts;
- positioning the device such that the device and membrane is located at a neck of the aneurysm;
- and
- expanding the device radially outwardly into apposition with an inner surface of the first vessel.
Dependencies are inferred from the claim text.