Endoprosthesis for hepaticogastrostomy use

An endoprosthesis extending axially along a central longitudinal axis between a first end and a second end, comprising:

• a body portion;
• and
• a flared portion extending between the body portion and the first end;
• wherein the body portion and the flared portion are formed from a single wire extending from the first end to the second end;
• wherein the body portion comprises an undulating arrangement of first struts and second struts defining peaks and valleys, wherein the body portion comprises:
• a first circumferential end segment extending circumferentially around the central longitudinal axis at a first body end, wherein centroids of the first struts and the second struts disposed within the first circumferential end segment lie within a first plane oriented generally perpendicular to the central longitudinal axis;
• a second circumferential end segment extending circumferentially around the central longitudinal axis at a second body end, wherein centroids of the first struts and the second struts disposed within the second circumferential end segment lie within a second plane oriented generally perpendicular to the central longitudinal axis;
• and
• a plurality of circumferential segments extending helically around the central longitudinal axis between the first circumferential end segment and the second circumferential end segment;
• wherein the flared portion comprises a plurality of knitted circumferential segments extending circumferentially around the central longitudinal axis from the body portion to the first end.

An endoprosthesis having a first end and a second end, comprising:

• a body portion extending axially along a central longitudinal axis from the second end toward the first end;
• a first end portion extending axially along a central longitudinal axis from the first end toward the second end;
• and
• a flanged portion extending between the body portion and the first end portion;
• wherein the body portion, the first end portion, and the flanged portion are formed from a single wire extending from the first end to the second end;
• wherein the body portion comprises an undulating arrangement of first struts and second struts defining peaks and valleys, wherein the body portion comprises:
• a first circumferential end segment extending circumferentially around the central longitudinal axis at a first body end, wherein the first circumferential end segment is oriented generally perpendicular to the central longitudinal axis;
• a second circumferential end segment extending circumferentially around the central longitudinal axis at a second body end, wherein the second circumferential end segment is oriented generally perpendicular to the central longitudinal axis;
• and
• a plurality of circumferential segments extending helically around the central longitudinal axis between the first circumferential end segment and the second circumferential end segment;
• wherein the flanged portion comprises a plurality of knitted circumferential segments extending circumferentially around the central longitudinal axis from the body portion to the first end portion;
• wherein the plurality of knitted circumferential segments extends circumferentially around the central longitudinal axis within the first end portion from the flanged portion to the first end.