Medical device
First Claim
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1. A medical device 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 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; and
a porous membrane that extends around and between the first and second struts, the membrane having a single-layer 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;
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.
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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.
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Citations
18 Claims
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1. A medical device 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 device comprising:
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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; and a porous membrane that extends around and between the first and second struts, the membrane having a single-layer 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; 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A stent device for treating an aneurysm, in a patient, the device comprising:
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an expandable latticework frame having 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, the frame defining a plurality of central regions that are each (i) bounded radially between the radially outermost edges and the radially innermost edges of respective, adjacent struts and (ii) bounded circumferentially and axially between the respective, adjacent struts; and a single-layer porous membrane attached to the frame and extending circumferentially only in the central regions between the struts, wherein a thickness of the membrane in the central regions is less than the wall thickness of the struts. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification