Pull back sleeve system with compression resistant inner shaft
First Claim
Patent Images
1. A stent delivery system comprising:
- a substantially incompressible inner core having proximal and distal ends;
a stent concentrically arranged around the inner core near the distal end;
an outer sheath concentrically arranged around the inner core and positioned along the inner core proximal to the stent;
a retractable distal sheath concentrically arranged around the inner core toward the distal end thereof, the retractable distal sheath surrounding at least a portion of the stent and being positioned along the inner core distal to the outer sheath, such that the retractable distal sheath is slidably movable along the inner core and relative to the outer sheath and wherein the retractable distal sheath and a portion of the distal end of the outer sheath are overlapping; and
retracting means extending from the proximal end of the stent delivery system toward the distal end, and being connected to the retractable distal sheath for retracting the retractable distal sheath proximally toward the outer sheath such that the retracting means moves axially with respect to the outer sheath,whereby when the retracting means is retracted the retractable distal sheath is retracted freeing the stent for delivery.
2 Assignments
0 Petitions
Accused Products
Abstract
A stent delivery system for delivering a stent comprising, a stent disposed on the distal end of the catheter, and an inner core, wherein the inner core is resistant to appreciable compression or accordion. The catheter further comprising a first sheath covering a portion of the inner core, wherein at least a portion of the distal end of the inner core is left uncovered by the first sheath, a retractable sheath which covers at least a portion of the stent and a portion of the distal end of the inner core and a retracting means for retracting the distal sheath to release the stent.
348 Citations
16 Claims
-
1. A stent delivery system comprising:
-
a substantially incompressible inner core having proximal and distal ends; a stent concentrically arranged around the inner core near the distal end; an outer sheath concentrically arranged around the inner core and positioned along the inner core proximal to the stent; a retractable distal sheath concentrically arranged around the inner core toward the distal end thereof, the retractable distal sheath surrounding at least a portion of the stent and being positioned along the inner core distal to the outer sheath, such that the retractable distal sheath is slidably movable along the inner core and relative to the outer sheath and wherein the retractable distal sheath and a portion of the distal end of the outer sheath are overlapping; and retracting means extending from the proximal end of the stent delivery system toward the distal end, and being connected to the retractable distal sheath for retracting the retractable distal sheath proximally toward the outer sheath such that the retracting means moves axially with respect to the outer sheath, whereby when the retracting means is retracted the retractable distal sheath is retracted freeing the stent for delivery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A stent delivery system comprising:
-
a substantially incompressible inner core having proximal and distal ends, and being made from a wire coil with a predetermined pitch such that it is flexible in an uncompressed state, and will become rigid when compressed; a stent concentrically arranged around the inner core near the distal end; an outer sheath concentrically arranged around the inner core and positioned along the inner core proximal to the stent; a retractable distal sheath surrounding at least a portion of the stent and being positioned along the inner core distal to the outer sheath, such that the retractable distal sheath is slidably movable along the inner core and relative to the outer sheath and wherein the retractable distal sheath and a portion of the distal end of the outer sheath are overlapping;
, andretracting means extending from the proximal end of the stent delivery system toward the distal end within the outer sheath, and being connected to the retractable distal sheath for retracting the retractable distal sheath, such that the retracting means moves axially with respect to the outer sheath; whereby when the retracting means is retracted to free the stent for delivery, the retractable distal sheath is retracted, causing the wire coil to compress, making the wire coil substantially rigid, preventing the inner core from collapsing.
-
-
16. A stent delivery system comprising:
-
a substantially incompressible inner core having proximal and distal ends; a stent concentrically arranged around the inner core near the distal end; an outer sheath concentrically arranged around the inner core; a retractable distal sheath concentrically arranged around and slidably movable along the inner core toward the distal end thereof, the retractable distal sheath surrounding at least a portion of the stent and wherein the retractable distal sheath and a portion of the distal end of the outer sheath are overlapping; and a retracting pull back wire extending from the proximal end of the stent delivery system toward the distal end, and being connected to the retractable distal sheath at said distal end for retracting the retractable distal sheath proximally such that the retracting means moves axially with respect to the inner core, whereby when the retracting pull back wire is retracted the retractable distal sheath is retracted freeing the stent for delivery.
-
Specification