STENT DELIVERY SYSTEM
First Claim
Patent Images
1. A stent delivery system comprising:
- an inner tube body having a guide wire lumen configured to receive a guide wire to guide movement of the stent delivery system;
a stent-containing tube body surrounding a distal portion of the inner tube body so that a space exists between an outer surface of the inner tube body and an inner surface of the stent-containing tube body;
a hollow longitudinally extending stent positioned in the space between the outer surface of the inner tube body and the inner surface of the stent-containing tube body so that the inner tube body passes through the stent, the stent being compressed while positioned in the space and being automatically expandable outwardly when exposed outside the stent-containing tube body, the stent possessing an inner surface, an proximal-most end and a distal-most end;
an elastic member positioned in the space between the outer surface of the inner tube body and the inner surface of the stent-containing tube body, the elastic member contacting an inner surface of the stent only at a portion of the longitudinal extent of the stent so that the stent is clamped between the elastic member and the stent-containing tube body, the portion being located closer to the proximal-most end of the stent than the distal-most end of the stent; and
the stent-containing tube body being slidable proximally relative to the stent to expose the stent outside the stent-containing tube body and permit the stent to expand outwardly.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent delivery system includes a self-expanding stent, an inner tube body which has a guide wire lumen, and a sheath which has the stent contained within the tip section thereof. The stent can be discharged by moving the sheath to the base end side relative to the inner tube body. The inner tube body is provided at a position within the base end section of the stent and is provided with an elastic member for pressing the stent in the direction to the sheath. The stent is gripped by the elastic member and the sheath and is adapted to be slidable relative to the sheath.
57 Citations
20 Claims
-
1. A stent delivery system comprising:
-
an inner tube body having a guide wire lumen configured to receive a guide wire to guide movement of the stent delivery system; a stent-containing tube body surrounding a distal portion of the inner tube body so that a space exists between an outer surface of the inner tube body and an inner surface of the stent-containing tube body; a hollow longitudinally extending stent positioned in the space between the outer surface of the inner tube body and the inner surface of the stent-containing tube body so that the inner tube body passes through the stent, the stent being compressed while positioned in the space and being automatically expandable outwardly when exposed outside the stent-containing tube body, the stent possessing an inner surface, an proximal-most end and a distal-most end; an elastic member positioned in the space between the outer surface of the inner tube body and the inner surface of the stent-containing tube body, the elastic member contacting an inner surface of the stent only at a portion of the longitudinal extent of the stent so that the stent is clamped between the elastic member and the stent-containing tube body, the portion being located closer to the proximal-most end of the stent than the distal-most end of the stent; and the stent-containing tube body being slidable proximally relative to the stent to expose the stent outside the stent-containing tube body and permit the stent to expand outwardly. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A stent delivery system comprising:
-
a stent having a hollow shape, compressed toward a center axis of the stent during insertion into a living body, and restorable to its pre-compression shape by expanding outward when indwelled in the living body; an inner tube body having a guide wire lumen configured to receive a guide to assist guiding movement of the stent delivery system in the living body; a stent-containing tube body having a distal portion containing the stent, the stent covering a distal portion of the inner tube body, the stent being dischargeable from the stent-containing tube body by moving the stent-containing tube body proximally relative to the inner tube body; the inner tube body including an elastic member disposed at a position at least within a proximal portion of the stent and pressing the stent in a direction toward the stent-containing tube body; and the stent is clamped between the elastic member and the stent-containing tube body, and is slidable relative to the stent-containing tube body. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification