Stent delivery system
First Claim
Patent Images
1. A stent delivery system comprising:
- a distal-side tube possessing a guide wire lumen;
a proximal-side tube;
a fixing tube fixed to a proximal portion of the distal-side tube and fixed to a distal portion of the proximal-side tube so as not to close a rear end opening of the distal-side tube;
a stent containing tubular member enclosing a distal portion of the distal-side tube and slidable toward the proximal portion of the distal-side tube;
at least one pulling wire extending inside the proximal-side tube, the at least one pulling wire having one end section fixed to the stent containing tubular member so that a proximal direction pulling force applied to the at least one pulling wire moves the stent containing tubular member in the proximal direction toward the proximal-side tube;
a cylindrically-shaped stent located in the stent containing tubular member, the stent being located in the stent containing tubular member in a compressed state in which the stent is compressed inwardly toward a central axis of the stent, the stent being expandable outwardly when released to outside the stent containing tubular member;
a stent proximal end lock section located on a distal side of the distal-side tube and abutting on a proximal end of the stent contained in the stent containing tubular member to restrict movement of the stent in the proximal direction;
a plurality of axially spaced apart distal-side priming slits passing through a side wall of the distal-side tube in proximity to the stent proximal end lock section;
a plurality of axially spaced apart proximal-side priming slits passing through the side wall of the distal-side tube on a proximal side of the distal-side tube; and
the plurality of axially spaced apart distal-side priming slits and the plurality of axially spaced apart proximal-side priming slits having a first configuration and a second configuration, a width of the plurality of axially spaced apart distal-side priming slits and a width of the plurality of axially spaced apart proximal-side priming slits being greater in the second configuration than in the first configuration;
the plurality of axially spaced apart distal-side priming slits and the plurality of axially spaced apart proximal-side priming slits configured to be opened and to thereby obtain the second configuration by injecting a liquid into the guide wire lumen of the distal-side tube, with a distal opening or a rear end opening of the guide wire lumen closed, such that, in the second configuration, the liquid passes through both the plurality of axially spaced apart distal-side priming slits and the plurality of axially spaced apart proximal-side priming slits;
wherein an axial distance between a proximal-most distal-side priming slit and a distal-most proximal-side priming slit is greater than a distance between axially adjacent distal-side priming slits and greater than a distance between axially adjacent proximal-side priming slits and the axial distance between the proximal-most distal-side priming slit and the distal-most proximal-side priming slit is devoid of priming slits; and
wherein at least some of the plurality of proximal-side priming slits are on a portion of the side wall of the distal-side tube disposed within a lumen of the fixing tube.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent delivery system includes a distal-side tube, a proximal-side tube, a fixing tube, a stent containing tubular member, a stent in the stent containing tubular member, and a pulling wire for moving the stent containing tubular member to the proximal side. The distal-side tube includes a distal-side priming slit provided in a side wall in proximity to a stent proximal end lock section and a proximal-side priming slit provided in a side wall on the proximal side of the distal-side tube. The slits are opened by injecting liquid, with the distal opening or the rear end opening of a guide wire lumen of the distal-side tube closed.
17 Citations
18 Claims
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1. A stent delivery system comprising:
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a distal-side tube possessing a guide wire lumen; a proximal-side tube; a fixing tube fixed to a proximal portion of the distal-side tube and fixed to a distal portion of the proximal-side tube so as not to close a rear end opening of the distal-side tube; a stent containing tubular member enclosing a distal portion of the distal-side tube and slidable toward the proximal portion of the distal-side tube; at least one pulling wire extending inside the proximal-side tube, the at least one pulling wire having one end section fixed to the stent containing tubular member so that a proximal direction pulling force applied to the at least one pulling wire moves the stent containing tubular member in the proximal direction toward the proximal-side tube; a cylindrically-shaped stent located in the stent containing tubular member, the stent being located in the stent containing tubular member in a compressed state in which the stent is compressed inwardly toward a central axis of the stent, the stent being expandable outwardly when released to outside the stent containing tubular member; a stent proximal end lock section located on a distal side of the distal-side tube and abutting on a proximal end of the stent contained in the stent containing tubular member to restrict movement of the stent in the proximal direction; a plurality of axially spaced apart distal-side priming slits passing through a side wall of the distal-side tube in proximity to the stent proximal end lock section; a plurality of axially spaced apart proximal-side priming slits passing through the side wall of the distal-side tube on a proximal side of the distal-side tube; and the plurality of axially spaced apart distal-side priming slits and the plurality of axially spaced apart proximal-side priming slits having a first configuration and a second configuration, a width of the plurality of axially spaced apart distal-side priming slits and a width of the plurality of axially spaced apart proximal-side priming slits being greater in the second configuration than in the first configuration; the plurality of axially spaced apart distal-side priming slits and the plurality of axially spaced apart proximal-side priming slits configured to be opened and to thereby obtain the second configuration by injecting a liquid into the guide wire lumen of the distal-side tube, with a distal opening or a rear end opening of the guide wire lumen closed, such that, in the second configuration, the liquid passes through both the plurality of axially spaced apart distal-side priming slits and the plurality of axially spaced apart proximal-side priming slits; wherein an axial distance between a proximal-most distal-side priming slit and a distal-most proximal-side priming slit is greater than a distance between axially adjacent distal-side priming slits and greater than a distance between axially adjacent proximal-side priming slits and the axial distance between the proximal-most distal-side priming slit and the distal-most proximal-side priming slit is devoid of priming slits; and wherein at least some of the plurality of proximal-side priming slits are on a portion of the side wall of the distal-side tube disposed within a lumen of the fixing tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A stent delivery system comprising:
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a distal-side tube possessing a guide wire lumen to receive a guide wire, the guide wire lumen being surrounded by a side wall of the distal-side tube, the guide wire lumen extending from an open distal end to an open proximal end so that a guide wire received in the guide wire lumen passes through the open distal end of the guide wire lumen and passes through the open proximal end of the guide wire lumen; a proximal-side tube; a fixing tube positioned axially between the distal-side tube and the proximal-side tube; a stent containing tubular member, a distal portion of the distal-side tube passing through the stent containing tubular member so that the distal-side tube and the stent containing tubular member axially overlap one another with an annular space between an inner surface of the stent containing tubular member and an outer surface of the distal-side tube, the stent containing tubular member being axially movable in a proximal direction relative to the distal-side tube; at least one pulling wire positioned in the proximal-side tube and possessing an end fixed to the stent containing tubular member so that a pulling force applied to the at least one pulling wire in the proximal direction moves the stent containing tubular member in the proximal direction; a cylindrically-shaped stent located in the annular space between the inner surface of the stent containing tubular member and the outer surface of the distal-side tube, the stent being compressed inwardly while in the annular space and being automatically expandable outwardly when released to outside the annular space; a stent proximal end lock section fixed to the distal-side tube, the stent proximal end lock section being positioned axially between a proximal end of the stent and a proximal-most end of the stent containing tubular member to restrict movement of the stent in the proximal direction; at least two distal-side priming slits and at least two proximal-side priming slits passing through the side wall of the distal-side tube, the at least two distal-side priming slits and the at least two proximal-side priming slits having a first configuration and a second configuration, a width of the at least two distal-side priming slits and a width of the at least two proximal-side priming slits being greater in the second configuration than in the first configuration, the at least two distal-side priming slits and the at least two proximal-side priming slits configured to be opened and to thereby obtain the second configuration upon injecting a liquid into the guide wire lumen while the open distal end or the open proximal end is closed, such that the liquid passes through both the at least two distal-side priming slits and the at least two proximal-side priming slits, the at least two distal-side priming slits and the at least two proximal-side priming slits being positioned between a proximal end of the stent containing tubular member and a distal end of the stent containing tubular member; the at least two distal-side priming slits and the at least two proximal-side priming slits passing through the side wall of the distal-side tube at a location between a distal end of the stent containing tubular member and a proximal end of the stent containing tubular member; and the at least two proximal-side priming slits disposed on a portion of the side wall of the distal-side tube located within a lumen of the fixing tube; wherein an axial distance between a proximal-most one of the at least two distal-side priming slits and a distal-most one of the at least two proximal-side priming slits is greater than a distance between axially adjacent distal-side priming slits and greater than a distance between axially adjacent proximal-side priming slits and the axial distance between the proximal-most one of the at least two distal-side priming slits and the distal-most one of the at least two proximal-side priming slits is devoid of any priming slits. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification