Stent delivery system
First Claim
1. A stent delivery system comprising:
- a distal-side tube possessing a guide wire lumen through which a guide wire is adapted to extend;
a proximal-side tube having an interior;
a fixing tube fixed to a proximal portion of the distal-side tube and a distal portion of the proximal-side tube, the fixing tube possessing an opening communicating with the guide wire lumen;
a stent accommodation tubular member enclosing a distal side of the distal-side tube and slidable toward a proximal end of the distal-side tube, the stent accommodation tubular member possessing a proximal end;
a cylindrically-shaped stent accommodated inside the stent accommodation tubular member in a compressed condition and being expandable outwardly when the stent is discharged from the stent accommodation tubular member so the stent returns to a configuration exhibited by the stent before being accommodated in the stent accommodation tubular member in the compressed condition;
at least one pulling wire possessing one end portion fixed relative to the stent accommodation tubular member so that movement of the one end portion of the wire toward a proximal side of the stent accommodation tubular member causes movement of the stent accommodation tubular member toward the proximal side;
the distal-side tube comprising a stent proximal portion-locking portion which contacts a proximal end of the stent accommodated inside the stent accommodation tubular member to prevent the stent from moving toward the proximal side;
a slide tube disposed proximally of the proximal end of the stent accommodation tubular member, the slide tube not being fixed to the stent accommodation tubular member;
the slide tube being movable toward the proximal side, together with the stent accommodation tubular member, when the pulling wire is pulled toward the proximal side so the slide tube either is received inside the fixing tube or receives the fixing tube.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent delivery system includes a distal-side tube having a guide wire lumen, a proximal-side tube, a fixing tube at which a proximal portion of the distal-side tube and a distal portion of the proximal-side tube are fixed and which has an opening communicating with the guide wire lumen, a stent accommodation tubular member which encloses a distal side of the distal-side tube and is slidable toward a proximal end of the distal-side tube, a stent accommodated inside the stent accommodation tubular member, and a pulling wire whose one end portion is fixed to the stent accommodation tubular member and which extends inside the proximal-side tube for moving the stent accommodation tubular member toward a proximal side by being pulled toward the proximal side.
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Citations
20 Claims
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1. A stent delivery system comprising:
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a distal-side tube possessing a guide wire lumen through which a guide wire is adapted to extend; a proximal-side tube having an interior; a fixing tube fixed to a proximal portion of the distal-side tube and a distal portion of the proximal-side tube, the fixing tube possessing an opening communicating with the guide wire lumen; a stent accommodation tubular member enclosing a distal side of the distal-side tube and slidable toward a proximal end of the distal-side tube, the stent accommodation tubular member possessing a proximal end; a cylindrically-shaped stent accommodated inside the stent accommodation tubular member in a compressed condition and being expandable outwardly when the stent is discharged from the stent accommodation tubular member so the stent returns to a configuration exhibited by the stent before being accommodated in the stent accommodation tubular member in the compressed condition; at least one pulling wire possessing one end portion fixed relative to the stent accommodation tubular member so that movement of the one end portion of the wire toward a proximal side of the stent accommodation tubular member causes movement of the stent accommodation tubular member toward the proximal side; the distal-side tube comprising a stent proximal portion-locking portion which contacts a proximal end of the stent accommodated inside the stent accommodation tubular member to prevent the stent from moving toward the proximal side; a slide tube disposed proximally of the proximal end of the stent accommodation tubular member, the slide tube not being fixed to the stent accommodation tubular member; the slide tube being movable toward the proximal side, together with the stent accommodation tubular member, when the pulling wire is pulled toward the proximal side so the slide tube either is received inside the fixing tube or receives the fixing tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20)
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17. A stent delivery system comprising:
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a distal-side tube in which extends a guide wire lumen adapted to receive a guide wire to direct the stent delivery system to a desired site, the guide wire lumen extending from a distal end of the distal-side tube to a proximal end of the distal-side tube; a proximal-side tube at least partially axially overlapping the distal-side tube, the proximal-side tube possessing an interior; a fixing tube having a proximal portion fixed to the distal-side tube, the fixing tube possessing an opening communicating with the guide wire lumen; a stent accommodation tubular member surrounding a portion of the distal-side tube and possessing a proximal-most end located distally of a distal-most end of the proximal-side tube, the stent accommodation tubular member surrounding a space; a stent positioned in the space in a compressed condition and expandable outwardly when the stent is discharged from the space in the stent accommodation tubular member; a pulling wire; connecting means for connecting the pulling wire and the stent accommodation tubular member so that the stent accommodation tubular member is moved in the proximal direction when a pulling force in the proximal direction is applied to the pulling wire; a slide tube positioned axially between the stent accommodation tubular member and the fixing tube, the slide tube not being fixed to the stent accommodation tubular member, the slide tube being axially movable together with the stent accommodation tubular member and being axially movable relative to the fixing tube; the slide tube moving in the proximal direction relative to the fixing tube when the pulling wire is pulled in the proximal direction to cause axial overlap between the slide tube and the fixing tube that increases with continued movement of the slide tube in the proximal direction relative to the fixing tube. - View Dependent Claims (18, 19)
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Specification