Covered endoprosthesis with improved branch drainage
An endoprosthesis may include an expandable framework including a body portion disposed between a first end and a second end, and a bowl portion disposed along the body portion; and a polymeric cover disposed on at least a portion of the expandable framework. The bowl portion may include an inner surface and an outer surface spaced apart radially outward from the inner surface. The bowl portion may extend radially outward from the body portion. The inner surface of the bowl portion may be devoid of the polymeric cover.
1 . An endoprosthesis, comprising:
an expandable framework having a lumen extending from a first end of the expandable framework to a second end of the expandable framework, the expandable framework including:
a body portion disposed between the first end and the second end, and
a bowl portion disposed along the body portion between the first end and the second end; and
a polymeric cover disposed on at least a portion of the expandable framework;
wherein the bowl portion extends radially outward from the body portion;
wherein the polymeric cover is disposed over the expandable framework from the first end to the second end of the expandable framework including the body portion and an outer surface of the bowl portion, except that an inner surface of the bowl portion within an interior of the bowl portion is devoid of the polymeric cover to permit fluid to flow from the interior of the bowl portion through the expandable framework into the lumen at a location between the first end and the second end.
2 . The endoprosthesis of claim 1 , wherein the polymeric cover includes a first portion extending from the first end toward the bowl portion and a second portion extending from the second end towards the bowl portion.
3 . The endoprosthesis of claim 2 , wherein the second portion of the polymeric cover extends into the interior of the bowl portion.
4 . The endoprosthesis of claim 2 , wherein the first portion of the polymeric cover extends along the outer surface of the bowl portion.
5 . The endoprosthesis of claim 2 , wherein the first portion of the polymeric cover longitudinally overlaps the second portion of the polymeric cover.
6 . The endoprosthesis of claim 5 , wherein the first portion is spaced apart radially outward from the second portion where the first portion of the polymeric cover longitudinally overlaps the second portion of the polymeric cover.
7 . The endoprosthesis of claim 1 , wherein the bowl portion is integrally formed with the body portion.
8 . The endoprosthesis of claim 7 , wherein the bowl portion includes an outer wall and an inner wall everted into the interior of the bowl portion from the outer wall, wherein the outer wall defines the outer surface of the bowl portion and the inner wall defines the inner surface of the bowl portion.
9 . The endoprosthesis of claim 8 , wherein the inner wall of the bowl portion is disposed radially outward of the body portion.
10 . The endoprosthesis of claim 1 , wherein the bowl portion includes an outer circumferential rim spaced radially outward from the body portion.
11 . The endoprosthesis of claim 10 , further comprising at least one radiopaque marker disposed along the outer circumferential rim.
12 . The endoprosthesis of claim 1 , wherein the bowl portion includes an open end facing toward the second end.
13 . The endoprosthesis of claim 1 , wherein the expandable framework includes only a single bowl portion.
14 . An endoprosthesis, comprising:
an expandable framework including:
a body portion disposed between a first end and a second end, and
only a single bowl portion disposed along the body portion; and
a polymeric cover disposed on at least a portion of the expandable framework;
wherein the bowl portion includes an inner surface and an outer surface spaced apart radially outward from the inner surface;
wherein the bowl portion extends radially outward from the body portion;
wherein the inner surface of the bowl portion is devoid of the polymeric cover.
15 . The endoprosthesis of claim 14 , wherein the polymeric cover includes a first portion and a second portion discontinuous with the first portion, the first portion extending from the first end toward the bowl portion and along the outer surface of the bowl portion, and the second portion extending from the second end towards the bowl portion and into an interior of the bowl portion.
16 . An endoprosthesis, comprising:
an expandable framework including:
a body portion disposed between a first end and a second end, and
a bowl portion disposed along the body portion; and
a polymeric cover disposed on at least a portion of the expandable framework;
wherein the bowl portion includes an inner surface and an outer surface spaced apart radially outward from the inner surface;
wherein the bowl portion extends radially outward from the body portion;
wherein the inner surface of the bowl portion is devoid of the polymeric cover;
wherein the polymeric cover includes a first portion and a second portion discontinuous with the first portion, the first portion extending from the first end toward the bowl portion and along the outer surface of the bowl portion, and the second portion extending from the second end towards the bowl portion and into an interior of the bowl portion.