STENT DELIVERY SYSTEM
First Claim
1. A stent delivery system comprising:
- an inner tube;
a stent which is compressed toward a center axis and disposed on a distal side of the inner tube as the stent is inserted into a lumen of a living body, and which can be restored into a pre-compression shape by expanding outward as the stent is indwelled in the lumen of the living body;
an outer tube disposed on an outer surface side of the inner tube, and configured to release the stent to the exterior by moving proximally relative to the inner tube; and
an operating unit for moving the outer tube in an axial direction relative to the inner tube,wherein the operating unit includes a housing, and a protector different from the housing, enclosing an outer circumferential side of the inner tube connected to the housing between the proximal end of the inner tube and the proximal end of the outer tube.
1 Assignment
0 Petitions
Accused Products
Abstract
In an operating unit constituting a stent delivery system, a protector for preventing an inner tube body from deforming is provided between a rack member and a containing groove guiding the rack member (so as to be movable. The protector, for example is a bellows shaped cylinder so as to be freely extendable and covers an outer circumferential side of the inner tube body. At the time of releasing a stent, the protector is compressed due to the movement of the rack member toward the proximal side and the inner tube body is prevented from deforming due to the protector, because an inner circumferential surface of the protector comes into contact with the inner tube body.
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Citations
20 Claims
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1. A stent delivery system comprising:
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an inner tube; a stent which is compressed toward a center axis and disposed on a distal side of the inner tube as the stent is inserted into a lumen of a living body, and which can be restored into a pre-compression shape by expanding outward as the stent is indwelled in the lumen of the living body; an outer tube disposed on an outer surface side of the inner tube, and configured to release the stent to the exterior by moving proximally relative to the inner tube; and an operating unit for moving the outer tube in an axial direction relative to the inner tube, wherein the operating unit includes a housing, and a protector different from the housing, enclosing an outer circumferential side of the inner tube connected to the housing between the proximal end of the inner tube and the proximal end of the outer tube. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A stent delivery system comprising:
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an inner tube possessing a proximal end and a distal end; an outer tube possessing a proximal end and a distal end; a stent positioned between an outer surface of the distal end of the inner tube and an inner surface of the distal end of the outer tube in a collapsed state of the stent, the stent being configured to expand radially outwardly from the collapsed state by moving the outer tube proximally relative to the inner tube; an operating unit operably connected to the outer tube and configured to move the outer tube proximally in an axial direction relative to the inner tube, wherein the operating unit includes a housing possessing an inner surface; a protector different from the housing positioned on the outer surface of the inner tube between the proximal end of the inner tube and the proximal end of the outer tube, the protector possessing an outer surface; and the protector possessing an inner surface facing the outer surface of the inner tube, and the outer surface of the protector being spaced from the inner surface of the housing. - View Dependent Claims (12, 13, 14, 15)
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16. A stent delivery system comprising:
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an inner tube possessing a proximal end and a distal end; an outer tube possessing a proximal end and a distal end; a stent positioned between an outer surface of the distal end of the inner tube and an inner surface of the distal end of the outer tube in a collapsed state of the stent, the stent being configured to expand radially outwardly from the collapsed state by moving the outer tube proximally relative to the inner tube; an operating unit including a housing, a connection body and a protector; the connection body possessing a distal-most end and a proximal-most end, the outer tube being connected to the distal-most end of the connection body and protector being connected to the proximal-most end of the connection body; the protector surrounding the outer surface of the inner tube between a proximal-most end of the inner tube and the proximal end of the outer tube; and an axial dimension of the protector being reduced when the connection tube is moved axially towards the proximal-most end of the inner tube. - View Dependent Claims (17, 18, 19, 20)
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Specification