Temporary stent system
First Claim
1. A stent delivery system comprising:
- a catheter having distal and proximal ends, said catheter defining at least one lumen extending therethrough and having two longitudinally displaced openings extending from the at least one lumen to an outer surface of the catheter;
a self expanding coil stent mounted on the outer surface of said catheter, said stent having proximal and distal ends, said stent having a mounted configuration with a first region having coils separated by a first spacing and a second region having coils separated by a second spacing, the first spacing being smaller than the second spacing;
restraining members structurally distinct from said stent and holding each of the proximal and distal ends of the stent to the catheter;
at least one release wire positioned in and extending longitudinally through the at least one lumen, wherein said restraining members extend through the longitudinally displaced openings to hold both ends of the stent, so that as the at least one release wire is withdrawn proximally, the coils of the stent self-unwind; and
said catheter defining one or more grooves positioned between the longitudinally displaced openings for retaining said stent in the mounted configuration with the first spacing at the first region and the larger second spacing at the second region.
4 Assignments
0 Petitions
Accused Products
Abstract
This application is directed to a stent delivery system for introducing a flexible, generally cylindrical, self-expandable stent. The system comprises a catheter having distal and proximal ends, the catheter defining at least one lumen extending therethrough and having at least three longitudinally displaced openings or sets of openings extending from a lumen to the surface of the catheter; a stent which comprises a generally cylindrical, expandable structure having proximal and distal ends and a flexible member extending proximally from the proximal end of the structure, the stent being wound circumferentially around the catheter, and having restraining means holding each of the proximal and distal ends of the stent to the catheter, and one or more restraining means holding at least a portion of the flexible member to the catheter surface; and one or two release wires positioned in and extending longitudinally through at least one lumen, the release wires cooperating with the restraining means so that as the release wire or wires are withdrawn proximally, the proximal and distal end sections of the stent are released in such a manner that coils of the stent unwind.
-
Citations
18 Claims
-
1. A stent delivery system comprising:
-
a catheter having distal and proximal ends, said catheter defining at least one lumen extending therethrough and having two longitudinally displaced openings extending from the at least one lumen to an outer surface of the catheter;
a self expanding coil stent mounted on the outer surface of said catheter, said stent having proximal and distal ends, said stent having a mounted configuration with a first region having coils separated by a first spacing and a second region having coils separated by a second spacing, the first spacing being smaller than the second spacing;
restraining members structurally distinct from said stent and holding each of the proximal and distal ends of the stent to the catheter;
at least one release wire positioned in and extending longitudinally through the at least one lumen, wherein said restraining members extend through the longitudinally displaced openings to hold both ends of the stent, so that as the at least one release wire is withdrawn proximally, the coils of the stent self-unwind; and
said catheter defining one or more grooves positioned between the longitudinally displaced openings for retaining said stent in the mounted configuration with the first spacing at the first region and the larger second spacing at the second region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18)
-
-
15. A stent delivery system comprising:
-
a catheter having distal and proximal ends, the catheter including a stent mounting location positioned adjacent the distal end;
a self expanding coil stent mounted at the stent mounting location of the catheter, the stent having proximal and distal ends, the stent including a first region having coils separated by a first spacing and a second region having coils separated by a second spacing, the first spacing being smaller than the second spacing;
the stent being secured to the catheter at connection locations located adjacent the proximal and distal ends of the stent;
at lease one release member positioned in and extending longitudinally through the catheter for releasing the stent such that the coils of the stent self-unwind; and
the catheter including one or more coil-spacers defined at an outer surface of the catheter at the stent mounting location, the coil-spacers being configured for preventing the stent from self-adjusting to a configuration with uniform spacing between the coils of the first and second regions when the stent is mounted at the stent mounting location, and wherein the one or more coil-spacers includes one or more grooves. - View Dependent Claims (16, 17)
-
Specification