Stents with temporary retaining bands
First Claim
Patent Images
1. An expandable stent for use in a body lumen comprising:
- an expandable stent framework, the stent framework expandable from a reduced diameter configuration to a fully expanded configuration;
and at least one stent retaining segment disposed about the stent framework, the stent retaining segment formed of at least one segment of material which is non-degradable in the body and at least one segment of degradable material joined together and constructed and arranged to fail upon degradation of at least a portion of the stent retaining segment, the stent retaining segment maintaining the stent framework in a less than fully expanded configuration prior to failure of the stent retaining segment.
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Accused Products
Abstract
A self-expanding stent is formed of a stent framework and retaining segments disposed about the framework. The retaining segments hold the stent in a partially or fully contracted state in a bodily vessel. The retaining segments are constructed to fail after a predetermined time or upon the application of a predetermined force. Upon failure of the segments, the stent expands in the bodily vessel.
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Citations
32 Claims
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1. An expandable stent for use in a body lumen comprising:
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an expandable stent framework, the stent framework expandable from a reduced diameter configuration to a fully expanded configuration;
and at least one stent retaining segment disposed about the stent framework, the stent retaining segment formed of at least one segment of material which is non-degradable in the body and at least one segment of degradable material joined together and constructed and arranged to fail upon degradation of at least a portion of the stent retaining segment, the stent retaining segment maintaining the stent framework in a less than fully expanded configuration prior to failure of the stent retaining segment. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An expandable stent comprising:
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an expandable stent framework, the stent framework expandable from a reduced diameter configuration to an initially deployed diameter configuration and being further expandable to a fully expanded configuration;
and at least one stent retaining segment disposed about the stent framework, the stent retaining segment constructed to fail in the body by erosion, the stent retaining segment maintaining the stent framework in the initially deployed diameter configuration, the stent retaining segment provided with one or more weakened regions to facilitate failure of the stent retaining segment. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An expandable stent comprising:
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an expandable stent framework, the stent framework expandable from a reduced diameter configuration to an initially deployed diameter configuration and being further expandable to a fully expanded configuration;
and at least one stent retaining segment made from a material disposed about the stent framework, the stent retaining segment maintaining the stent framework in the initially deployed diameter configuration, the stent retaining segment constructed and arranged to have at least one fatigue point thereon, the stent retaining segment narrowing at the fatigue point, the stent retaining segment constructed and arranged to fail by erosion of the at least one fatigue point. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A treatment method comprising the steps of:
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i) implanting an expandable prosthesis in a bodily lumen, the expandable prosthesis comprising 1) an expandable prosthesis framework, the prosthesis framework expandable from a reduced diameter configuration to a fully expanded configuration; and
2) a prosthesis retaining segment which is constructed to fail upon dissolution of at least a portion thereof, the prosthesis retaining segment formed at least in part of a biodegradable material joined to a material which is non-degradable in the body, the prosthesis retaining segment disposed about the prosthesis and maintaining the prosthesis framework in a reduced diameter configuration. - View Dependent Claims (27, 28)
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29. A treatment method comprising the steps of:
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implanting an expandable prosthesis in a bodily lumen, the expandable prosthesis comprising 1) an expandable prosthesis framework, the prosthesis framework expandable from a reduced diameter configuration to an initially deployed diameter configuration and being further expandable to a fully expanded configuration; and
2) a prosthesis retaining segment which is constructed to have at least one weakened point thereon to facilitate failure of the segment under a predetermined set of conditions, the prosthesis retaining segment disposed about the prosthesis and maintaining the prosthesis framework in the initially deployed diameter.
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30. An expandable medical endoprosthesis for implantation in a bodily vessel comprising:
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an expandable endoprosthesis framework expandable from a reduced diameter configuration to a fully expanded configuration;
and at least one degradable endoprosthesis retaining structure disposed about the endoprosthesis framework, the endoprosthesis retaining structure formed of at least one segment of material which is non-degradable in the body and at least one segment of degradable material joined together and constructed and arranged to fail upon degradation of at least a portion of the endoprosthesis retaining structure, the endoprosthesis retaining structure maintaining the endoprosthesis framework in a reduced diameter configuration prior to failure of the endoprosthesis retaining structure. - View Dependent Claims (31, 32)
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Specification