Bifurcation Stent Design with Over Expansion Capability
First Claim
1. A bifurcation stent comprising a main branch portion and a side branch portion, the main branch portion and the side branch portion interfacing about a frame, the stent having an unexpanded state in which the stent comprises a generally tubular wall defining a first lumen and an expanded state in which the said first lumen is radially enlarged and a side branch projects obliquely outward from the first lumen, the side branch defining a second lumen in fluid communication with the first lumen through an opening defined by said frame, whereinthe frame has a first stable configuration enclosing a first area when subjected to frame expansion stress within a first pressure range and the frame expands to a second configuration enclosing a second area larger than the first area when the frame is subjected to expansion stress above the first pressure range.
1 Assignment
0 Petitions
Accused Products
Abstract
A bifurcation having a main branch portion and a side branch portion which interface about a frame. The frame is expandable from a first configuration enclosing a first area to a second configuration enclosing a second area wherein the second area is larger than the first area.
62 Citations
20 Claims
-
1. A bifurcation stent comprising a main branch portion and a side branch portion, the main branch portion and the side branch portion interfacing about a frame, the stent having an unexpanded state in which the stent comprises a generally tubular wall defining a first lumen and an expanded state in which the said first lumen is radially enlarged and a side branch projects obliquely outward from the first lumen, the side branch defining a second lumen in fluid communication with the first lumen through an opening defined by said frame, wherein
the frame has a first stable configuration enclosing a first area when subjected to frame expansion stress within a first pressure range and the frame expands to a second configuration enclosing a second area larger than the first area when the frame is subjected to expansion stress above the first pressure range.
- 15. A bifurcation stent comprising a main branch portion and a side branch portion, the main branch portion and the side branch portion interfacing about a frame, the stent having an unexpanded state in which the stent comprises a generally tubular wall defining a first lumen and an expanded state in which the said first lumen is radially enlarged and a side branch projects obliquely outward from the first lumen, the side branch defining a second lumen in fluid communication with the first lumen through an opening defined by said frame, the frame being enlargeable from a first configuration enclosing a first area to a second configuration enclosing a second area, the second area being larger than the first area, the frame comprising three or more undulations each having an amplitude that can be modified to enlarge the frame area in the second configuration, and said undulations being located in a portion of the frame not shared with a contralateral expansion column of the stent.
Specification