Stent graft delivery system
First Claim
1. A system for treating an aneurysm in a blood vessel, the system comprising:
- an elongate flexible shaft having a proximal region and a distal region;
a first double-walled filling structure disposed over the distal region of the shaft, the filling structure having an outer wall and an inner wall, wherein the filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a first substantially tubular lumen to provide a path for blood flow across the aneurysm;
at least a first expandable scaffold disposed at least partly within the filling structure during delivery, the first scaffold radially expandable within at least a portion of the tubular lumen of the filling structure, wherein the first scaffold and the first double-walled filling structure are distinctly separate elements; and
one or more tethers coupling the first scaffold to the first filling structure, wherein the one or more tethers are configured to limit axial movement of the first filling structure relative the first scaffold so that the first scaffold and the first filling structure remain concentric with each other along the first flexible shaft during delivery and deployment of the first scaffold and the first double-walled filling structure, wherein the one or more tethers comprise a first releasable coupling mechanism that limits axial movement of the first filling structure relative the first scaffold.
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Accused Products
Abstract
A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
378 Citations
21 Claims
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1. A system for treating an aneurysm in a blood vessel, the system comprising:
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an elongate flexible shaft having a proximal region and a distal region; a first double-walled filling structure disposed over the distal region of the shaft, the filling structure having an outer wall and an inner wall, wherein the filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a first substantially tubular lumen to provide a path for blood flow across the aneurysm; at least a first expandable scaffold disposed at least partly within the filling structure during delivery, the first scaffold radially expandable within at least a portion of the tubular lumen of the filling structure, wherein the first scaffold and the first double-walled filling structure are distinctly separate elements; and one or more tethers coupling the first scaffold to the first filling structure, wherein the one or more tethers are configured to limit axial movement of the first filling structure relative the first scaffold so that the first scaffold and the first filling structure remain concentric with each other along the first flexible shaft during delivery and deployment of the first scaffold and the first double-walled filling structure, wherein the one or more tethers comprise a first releasable coupling mechanism that limits axial movement of the first filling structure relative the first scaffold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A system for treating an aneurysm in a blood vessel, the system comprising:
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an elongate flexible shaft having a proximal region and a distal region; a first double-walled filling structure disposed over the distal region of the shaft, the filling structure having an outer wall and an inner wall, wherein the filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a first substantially tubular lumen to provide a path for blood flow across the aneurysm; at least a first expandable scaffold disposed at least partly within the filling structure during delivery, the first scaffold radially expandable within at least a portion of the tubular lumen of the filling structure, wherein the first scaffold and the first double-walled filling structure are distinctly separate elements; a plurality of tether loops coupling the first scaffold to the first filling structure, the plurality of tether loops being distributed about a proximal end of each of the first filling structure and the first scaffold so as to limit axial movement of the first filling structure relative the first scaffold during delivery so that the first scaffold and the first filling structure remain concentric with each other during delivery and deployment; and a first releasable coupling mechanism configured to limit relative movement of the first double-walled filling structure and the first expandable scaffold and release from the elongate flexible shaft to facilitate delivery and deployment. - View Dependent Claims (20, 21)
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Specification