Delivery device for delivering a stent device
First Claim
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1. A delivery device for delivering a stent device to a target treatment site, comprising:
- a stent device having a longitudinal axis, a lumen extending axially through the stent device, an inner surface defining the lumen and an outer surface, wherein the stent device is in a radially reduced profile, delivery configuration and is expandable to a radially increased profile, deployed configuration;
an inner member extending axially through the lumen of the stent device;
an outer sheath holding the stent device in the delivery configuration and axially retractable to release the stent device to expand to the deployed configuration; and
anchorage configured to hold the stent device axially to the inner member as the outer sheath is dragged over an outer surface of the stent device;
the anchorage being such that a distal axial portion of the stent device is held to the inner member to a greater extent than a remaining axial length of the stent device;
the anchorage comprises a stop for limiting axial movement of the stent device by abutting against a surface of the stent device, the stop being spaced a predetermined axial distance from the surface so that the remaining portion of the stent device is able to move the predetermined distance with the outer sheath during retraction of the outer sheath,wherein the stop is arranged to abut a proximal end surface of the stent device and is spaced proximally from the surface by the predetermined distance.
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Abstract
A delivery device (12) for delivering a stent device (3) in a reduced profiled delivery configuration is provided. A distal region (9) of the stent device is axially anchored to an inner catheter (2) by annular rings (5, 6) about the inner catheter. A remaining portion (10) of the stent device is spaced radially from the inner catheter. A proximal stop (4) is spaced axially from a proximal end of the stent device. The stent device is maintained in the reduced profile delivery configuration by a retractable outer sheath (1).
132 Citations
20 Claims
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1. A delivery device for delivering a stent device to a target treatment site, comprising:
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a stent device having a longitudinal axis, a lumen extending axially through the stent device, an inner surface defining the lumen and an outer surface, wherein the stent device is in a radially reduced profile, delivery configuration and is expandable to a radially increased profile, deployed configuration; an inner member extending axially through the lumen of the stent device; an outer sheath holding the stent device in the delivery configuration and axially retractable to release the stent device to expand to the deployed configuration; and anchorage configured to hold the stent device axially to the inner member as the outer sheath is dragged over an outer surface of the stent device; the anchorage being such that a distal axial portion of the stent device is held to the inner member to a greater extent than a remaining axial length of the stent device; the anchorage comprises a stop for limiting axial movement of the stent device by abutting against a surface of the stent device, the stop being spaced a predetermined axial distance from the surface so that the remaining portion of the stent device is able to move the predetermined distance with the outer sheath during retraction of the outer sheath, wherein the stop is arranged to abut a proximal end surface of the stent device and is spaced proximally from the surface by the predetermined distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A stent delivery device, comprising:
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a stent; an inner member extending axially through a lumen of the stent; an outer sheath holding the stent in a delivery configuration, the outer sheath axially retractable to release the stent to expand to a deployed configuration; and anchorage configured to hold the stent axially to the inner member as the outer sheath is retracted, the anchorage including; structure to hold a distal portion of the stent to a greater extent than a remaining length of the stent proximal of the distal portion; and a stop to limit axial movement of the stent by abutting against a proximal end of the stent, the stop spaced a predetermined distance from the stent proximal end to permit movement of the remaining length of the stent during retraction of the outer sheath.
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Specification