STENT DELIVERY SYSTEM
First Claim
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1. A stent delivery system comprising:
- an inner member;
a sheath that is arranged outside the inner member so as to be movable in an axial direction with respect to the inner member;
a self-expandable stent that is arranged between the inner member and the sheath; and
a grip that includes a movement mechanism for moving the sheath in the axial direction with respect to the inner member,wherein the stent is contained in the sheath in an initial state, and the stent is released inside a living body lumen in accordance with a movement of the sheath in a proximal direction with respect to the inner member, andwherein the movement mechanism has a displacement member which is connected to the sheath, wherein the displacement member is movable along the axial direction of the stent delivery system and extends in the axial direction; and
a plurality of driving rotators which are arranged at intervals from each other in an extension direction of the displacement member, and move the displacement member in the extension direction in accordance with rotations of the plurality of driving rotators.
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Abstract
A stent delivery system is disclosed in which a stent is contained in a sheath in an initial state and the stent is released inside a living body lumen in accordance with a movement of the sheath in a proximal direction with respect to an inner member. A movement mechanism of the stent delivery system has a rack member which is connected to a proximal end of the sheath, and a plurality of pinions which move the rack member in accordance with rotations thereof.
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Citations
17 Claims
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1. A stent delivery system comprising:
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an inner member; a sheath that is arranged outside the inner member so as to be movable in an axial direction with respect to the inner member; a self-expandable stent that is arranged between the inner member and the sheath; and a grip that includes a movement mechanism for moving the sheath in the axial direction with respect to the inner member, wherein the stent is contained in the sheath in an initial state, and the stent is released inside a living body lumen in accordance with a movement of the sheath in a proximal direction with respect to the inner member, and wherein the movement mechanism has a displacement member which is connected to the sheath, wherein the displacement member is movable along the axial direction of the stent delivery system and extends in the axial direction; and a plurality of driving rotators which are arranged at intervals from each other in an extension direction of the displacement member, and move the displacement member in the extension direction in accordance with rotations of the plurality of driving rotators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification