STENT DELIVERY SYSTEM
First Claim
1. A stent delivery system comprising:
- a tube body having a guide wire lumen;
a stent-containing tubular member enveloping a distal end portion of the tube body and being slidable relative to the tube body toward a proximal end of the tube body;
a stent contained in the stent-containing tubular member;
a wire having one end portion fixed to the stent-containing tubular member and operable to move the stent-containing tubular member in a proximal direction;
the tube body including a stent lock section abutting a proximal end of the stent contained in the stent-containing tubular member to restrict movement of the stent in the proximal direction;
the stent possessing a cylindrical shape and being contained in the stent-containing tubular member while in a compressed state in which the stent is compressed toward a center axis of the stent, and the stent being restored to a pre-compression shape through outward expansion when indwelled in a living body;
an operating section located proximally of the stent-containing tubular member;
the operating section including a wire winding mechanism for winding the wire to thereby move the stent-containing tubular member toward the proximal direction and a wire winding amount restriction mechanism for restricting a length of the wire pulled by the wire winding mechanism;
the wire winding mechanism including an operating section housing and an operating rotary roller having a portion exposed from the operating section housing which is operable by a user to rotate the operating rotary roller and wind the wire;
the wire winding mechanism including a winding shaft section coaxial and integral with the operating rotary roller, the one end portion of the wire being held on the winding shaft section;
the winding shaft section having a smaller outer diameter than the operating rotary roller;
the wire winding amount restriction mechanism including a driving gear coaxial and integral with the operating rotary roller and a driven gear rotated intermittently by the driving gear; and
the driven gear and the driving gear being configured as a stopper to stop rotation of the driving gear after rotation of the driving gear by a predetermined amount.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent delivery system includes: a distal-side tube; a proximal-side tube; a tubular member which contains a stent; a wire which has one end fixed to the tubular member; and an operating section which has a wire winding mechanism and a wire winding amount restriction mechanism for restricting the length of wire which is pulled. The operating section has an operating rotary roller; a winding shaft section and driving gear which are provided coaxially and integrally with the roller; and a driven gear which is intermittently rotated by the driving gear. The driving gear and the driven gear have the stopper function by which rotation of the driving gear is stopped after the driving gear is rotated a predetermined amount.
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Citations
20 Claims
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1. A stent delivery system comprising:
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a tube body having a guide wire lumen; a stent-containing tubular member enveloping a distal end portion of the tube body and being slidable relative to the tube body toward a proximal end of the tube body; a stent contained in the stent-containing tubular member; a wire having one end portion fixed to the stent-containing tubular member and operable to move the stent-containing tubular member in a proximal direction; the tube body including a stent lock section abutting a proximal end of the stent contained in the stent-containing tubular member to restrict movement of the stent in the proximal direction; the stent possessing a cylindrical shape and being contained in the stent-containing tubular member while in a compressed state in which the stent is compressed toward a center axis of the stent, and the stent being restored to a pre-compression shape through outward expansion when indwelled in a living body; an operating section located proximally of the stent-containing tubular member; the operating section including a wire winding mechanism for winding the wire to thereby move the stent-containing tubular member toward the proximal direction and a wire winding amount restriction mechanism for restricting a length of the wire pulled by the wire winding mechanism; the wire winding mechanism including an operating section housing and an operating rotary roller having a portion exposed from the operating section housing which is operable by a user to rotate the operating rotary roller and wind the wire; the wire winding mechanism including a winding shaft section coaxial and integral with the operating rotary roller, the one end portion of the wire being held on the winding shaft section; the winding shaft section having a smaller outer diameter than the operating rotary roller; the wire winding amount restriction mechanism including a driving gear coaxial and integral with the operating rotary roller and a driven gear rotated intermittently by the driving gear; and the driven gear and the driving gear being configured as a stopper to stop rotation of the driving gear after rotation of the driving gear by a predetermined amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A stent delivery system comprising:
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a tube body having a guide wire lumen for receiving a guide wire to guide movement of the stent delivery system; a stent-containing tubular member surrounding a portion of the tube body and axially movable relative to the tube body; a compressed stent positioned in the stent-containing tubular member, the compressed stent expanding to a non-compressed state when removed from the stent-containing tubular member and indwelled in a living body; a wire having one end portion fixed to the stent-containing tubular member, the wire also possessing an opposite end portion; a rotary roller rotatably mounted in a housing and rotatably operable from outside the housing to rotate the operating rotary roller; a winding shaft coaxial with the rotary roller and fixed to the rotary roller to rotate together with the rotary roller, the opposite end portion of the wire being held on the winding shaft so that the wire is wound on the winding shaft during rotation of the rotary roller in one rotational direction to move the stent-containing tubular member proximally to allow the stent to be removed from the stent-containing tubular member; a driving gear coaxial and integral with the rotary roller to rotate with the rotary roller about a first rotation axis, the driving gear including an engaging portion which rotates together with the driving gear; a driven gear positioned adjacent the driving gear and rotatable about a second rotation axis non-coaxially arranged relative to the first rotation axis; the engaging portion of the driving gear engaging the driven gear during rotation of the driving gear to cause the driven gear to rotate; and the driven gear including a stop portion engageable by the engaging portion of the driving gear after the driving gear has rotated a predetermined amount so that further rotation of the driving gear is stopped when the engaging portion engages the stop, the predetermined amount of rotation of the driving gear being an amount that winds a portion of the wire on the winding shaft so that the stent-containing tubular member is moved proximally to allow the stent to be removed from the stent-containing tubular member. - View Dependent Claims (19, 20)
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Specification