Retrievable stent system
AssigneeBoston Scientific Scimed, Inc.
InventorsMartyn G. Folan, Thomas M. Keating
Life of this patent
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Abstract
A system for treating a body lumen including a first stent configured to be positioned in a body lumen and a second stent configured to be positioned in the lumen of the first stent prior to removing the first stent from the body lumen. The first stent includes a liner disposed radially inward of the tubular scaffold of the first stent to permit tissue ingrowth within a tissue ingrowth region defined between the liner and the tubular scaffold. The retrieval stent is configured to be expanded within the previously implanted first stent to cause tissue to recede from the tissue ingrowth region to facilitate removal of the first stent from the body lumen.
Claims20
A method of treating a body lumen, the method comprising:
- advancing a retrieval stent into the lumen of an implanted stent disposed along an inner surface of the body lumen, wherein a portion of tissue defining the inner surface of the body lumen has grown into the implanted stent, and wherein the implanted stent includes:
- a liner disposed within the lumen of the implanted stent, wherein the liner is configured to be radially spaced from a medial region of the implanted stent to define a tissue ingrowth region along a portion of the implanted stent;
- deploying the retrieval stent within the lumen of the implanted stent, wherein an outer surface of the retrieval stent exerts an outward radial force along the ingrown tissue region of the implanted stent, and wherein the retrieval stent causes the ingrown tissue to recede.
A system for treating a body lumen, comprising:
- a first stent including:
- a first tubular scaffold, the first tubular scaffold including an inner surface, an outer surface, a first end region, a second end region, a medial region extending between the first end region and the second end region, and a lumen extending from the first end region to the second end region;
- and
- a liner disposed within the lumen of the first tubular scaffold, wherein first regions of the inner surface of the first tubular scaffold are in direct contact with first portions of the liner, thereby preventing tissue ingrowth, and second regions of the inner surface of the first tubular scaffold are spaced-apart from the liner thereby defining tissue ingrowth regions;
- and
- a second stent including:
- a second tubular scaffold and a covering disposed on the second tubular scaffold;
- wherein the second stent is configured to be positioned within the first stent such that expansion of the second stent causes the tissue ingrowth to recede.
Dependencies are inferred from the claim text.