STENT DELIVERY SYSTEM
First Claim
1. A stent delivery system comprising:
- a distal-side tube possessing a guide wire lumen which opens at opposite ends to permit passage of a guide wire to guide the stent delivery system to a target site in a living body, the distal-side tube possessing a proximal end portion;
a proximal-side tube connected to the proximal end portion of the distal-side tube, the proximal-side tube possessing a distal end portion;
a stent-accommodating tube body surrounding at least a portion of the distal-side tube and the distal end portion of the proximal-side tube, the stent-accommodating tube body possessing a distal end portion having an inner surface spaced outwardly from an outer surface of the portion of the distal-side tube so that a space exists between the outer surface of the portion of the distal-side tube and the inner surface of the distal end portion of the stent-accommodating tube body;
a stent accommodated in the space between the outer surface of the portion of the distal-side tube and the inner surface of the distal end portion of the stent-accommodating tube body so that the stent surrounds the portion of the distal-side tube and is covered by the distal end portion of the stent-accommodating tube body;
the stent including a side-wall provided with a plurality of through openings, the stent being compressed inwardly while accommodated in the space and covered by the distal end portion of the stent-accommodating tube body and being restorable to a pre-compression shape by expanding outwardly when the stent-accommodating tube is moved proximally relative to the distal-side tube to release the stent;
an elongated rack member positioned in a housing and fixed to a proximal end of the stent-accommodating tube body;
a rotatably mounted operation roller operatively engaging the rack so that operative rotation of the operation roller moves the rack member relative to the housing to thus move the stent-accommodating tube body; and
a stent holder positioned in the space between the outer surface of the portion of the distal-side tube and the inner surface of the distal end portion of the stent-accommodating tube body, the stent holder holding the proximal end portion of the stent so that when a distal end portion of the stent is exposed outside the stent-accommodating tube body and is no longer covered by the stent-accommodating tube body by virtue of the stent-accommodating tube body being moved in a proximal direction relative to the distal-side tube through rotation of the operation roller in one rotational direction, the exposed distal end portion of the stent is re-accommodated inside and covered by the distal end portion of the stent-accommodating tube body through rotation of the roller in a rotational direction opposite the one rotational direction.
1 Assignment
0 Petitions
Accused Products
Abstract
A stent delivery system includes a body and an operation unit disposed at the proximal end of the body. The body includes a self-expanding stent, an inner tube body, and a stent-accommodating tube body in which the stent is accommodated. The inner tube body has a stent-holding part enabling the stent to be re-accommodated into the stent-accommodating tube body. The operation unit includes a rack member fixed to a proximal end of the stent-accommodating tube body, an operation rotary roller having a working gear wheel that engages the teeth of the rack member, thereby causing the rack member to move forward and backward; and a connector fixed to a proximal end portion of a proximal-side tube that penetrates the stent-accommodating tube body and protrudes from the proximal end of the stent-accommodating tube body.
61 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 which opens at opposite ends to permit passage of a guide wire to guide the stent delivery system to a target site in a living body, the distal-side tube possessing a proximal end portion; a proximal-side tube connected to the proximal end portion of the distal-side tube, the proximal-side tube possessing a distal end portion; a stent-accommodating tube body surrounding at least a portion of the distal-side tube and the distal end portion of the proximal-side tube, the stent-accommodating tube body possessing a distal end portion having an inner surface spaced outwardly from an outer surface of the portion of the distal-side tube so that a space exists between the outer surface of the portion of the distal-side tube and the inner surface of the distal end portion of the stent-accommodating tube body; a stent accommodated in the space between the outer surface of the portion of the distal-side tube and the inner surface of the distal end portion of the stent-accommodating tube body so that the stent surrounds the portion of the distal-side tube and is covered by the distal end portion of the stent-accommodating tube body; the stent including a side-wall provided with a plurality of through openings, the stent being compressed inwardly while accommodated in the space and covered by the distal end portion of the stent-accommodating tube body and being restorable to a pre-compression shape by expanding outwardly when the stent-accommodating tube is moved proximally relative to the distal-side tube to release the stent; an elongated rack member positioned in a housing and fixed to a proximal end of the stent-accommodating tube body; a rotatably mounted operation roller operatively engaging the rack so that operative rotation of the operation roller moves the rack member relative to the housing to thus move the stent-accommodating tube body; and a stent holder positioned in the space between the outer surface of the portion of the distal-side tube and the inner surface of the distal end portion of the stent-accommodating tube body, the stent holder holding the proximal end portion of the stent so that when a distal end portion of the stent is exposed outside the stent-accommodating tube body and is no longer covered by the stent-accommodating tube body by virtue of the stent-accommodating tube body being moved in a proximal direction relative to the distal-side tube through rotation of the operation roller in one rotational direction, the exposed distal end portion of the stent is re-accommodated inside and covered by the distal end portion of the stent-accommodating tube body through rotation of the roller in a rotational direction opposite the one rotational direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A stent delivery system comprising:
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a stent delivery system main body and an operation unit, the operation unit being disposed at a proximal end portion of the stent delivery system main body, the stent delivery system main body including; a substantially cylindrically-shaped stent possessing a center axis and having a multiplicity of side-wall openings, the stent being compressed toward its center axis upon insertion into a living body and being restorable to its pre-compression shape by expanding outward during indwelling in the living body, the stent possessing a proximal end portion; an inner tube body possessing a distal end portion, the inner tube body including a distal-side tube having a guide wire lumen, and a proximal-side tube connected to a proximal end portion of the distal-side tube; a stent-accommodating tube body possessing a distal end portion, the proximal-side tube penetrating the stent-accommodating tube body, the stent being accommodated in the distal end portion of the stent-accommodating tube body; the stent covering the distal end portion of the inner tube body; the stent being releasable by moving the stent-accommodating tube body in a proximal direction relative to the inner tube body; and the operation unit including; a housing; a shaft-shaped rack member accommodated in the housing and fixed to a proximal end of the stent-accommodating tube body, the rack member possessing teeth; a rotatably mounted operation rotary roller having a working gear wheel which engages the teeth of the rack member to move the rack member within the housing; and a connector fixed to a proximal end portion of the proximal-side tube and protruding proximally beyond the proximal end of the stent-accommodating tube body, the connector being held by the housing, and means for releasably holding the proximal end portion of the stent to permit re-accommodation of the stent into the stent-accommodating tube body by forward movement of the stent-accommodating tube body after partial exposure of the stent from the stent-accommodating tube body, the stent being releasable from the stent-accommodating tube body by moving the rack member toward the connector through rotation of the operation rotary roller in one rotational direction and, after partial exposure of the stent from the stent-accommodating tube body, the stent is re-accommodated into the stent-accommodating tube body by moving the rack member within the housing away from the connector through rotation of the operation rotary roller in a direction reverse to the one rotational direction. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification