# US 10,307,273 B2 · Stent with anti-migration features > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,307,273 B2 - Document ID: US10307273B2 - Status: Granted - Kind: B2 - Application number: 15/055,510 - Filed: 2016-02-26 - Published: 2016-09-08 - Granted: 2019-06-04 - Earliest claimed: 2015-03-03 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientific Scimed, Inc. - Inventors: Timothy L. Rubesch; John A. Hingston; Michael D. Amos; Terry V. Brown - Web page: https://patentgrep.com/patent/US10307273B2 ## CPC - A61F 2/848: having means for fixation to the vessel wall, e.g. barbs - A61F 2/90: characterised by a net-like or mesh-like structure - A61F 2002/041: {Bile ducts} - A61F 2002/047: {Urethrae} - A61F 2002/048: {Ureters} - A61F 2002/072: {Encapsulated stents, e.g. wire or whole stent embedded in lining} - A61F 2002/8483: {Barbs} - A61F 2210/0076: multilayered, e.g. laminated structures - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) ## Abstract An implantable medical device for implantation within a passageway of a patient comprises a stent including a plurality of wires, at least one of the plurality of wires having a cross-section having a first tapered point, and a covering layer having an inner diameter and an outer diameter. In some embodiments, the plurality of wires may be disposed at least partially around the covering layer. Additionally in some embodiments, the first tapered point may extend outward further than the outer diameter of the covering layer. ## Claims ### Claim 1 An implantable medical device for implantation within a passageway of a patient, the device comprising: a tubular framework including a plurality of interwoven wires, at least one of the plurality of interwoven wires comprising a cross-section having a first tapered point, the cross-section of the at least one wire taken transverse to a longitudinal length of the wire such that the first tapered point extends along the longitudinal length of the wire; a covering layer having a central longitudinal axis and an inner diameter and an outer diameter; wherein the covering layer covers at least a portion of the framework and extends between adjacent wires of the plurality of interwoven wires included in the portion of the framework, and wherein the first tapered point extends outward further than the outer diameter of portions of the covering layer that extend between the adjacent wires. ### Claim 2 (depends on 1) The implantable medical device of claim 1, wherein the at least one of the plurality of interwoven wires has a cross-section having a second tapered point. ### Claim 3 (depends on 2) The implantable medical device of claim 2, wherein the second tapered point extends inward further than the outer diameter of the portions of the covering layer that extend between the adjacent wires. ### Claim 4 (depends on 2) The implantable medical device of claim 2, wherein the second tapered point extends inward further than the inner diameter of the portions of the covering layer that extend between the adjacent wires. ### Claim 5 (depends on 2) The implantable medical device of claim 2, wherein the cross-section of the at least one of the plurality of interwoven wires further comprises a third tapered point. ### Claim 6 (depends on 2) The implantable medical device of claim 2, wherein the first tapered point extends outward in a direction opposite the second tapered point. ### Claim 7 (depends on 1) The implantable medical device of claim 1, wherein the cross-section of the at least one of the plurality of interwoven wires is triangular. ### Claim 8 (depends on 1) The implantable medical device of claim 1, wherein the cross-section of the at least one of the plurality of interwoven wires further comprises a rectangular projection. ### Claim 9 An implantable medical device for implantation within a passageway of a patient, the device comprising: a tubular framework including a plurality of interwoven wires, at least one of the plurality of interwoven wires comprising a cross-section having a first tapered point oriented radially outward from a central longitudinal axis of the framework, the cross-section of the at least one wire taken transverse to a longitudinal length of the wire such that the first tapered point extends along the longitudinal length of the wire; and a covering layer disposed over the framework and extending between adjacent wires of the plurality of interwoven wires, the covering layer having an inner diameter and an outer diameter; wherein the first tapered point is embedded in the covering layer and forms a radially outward extending bump in an outer wall surface of the covering layer extending radially outward of the outer diameter of the covering layer. ### Claim 10 (depends on 9) The implantable medical device of claim 9, wherein the at least one of the plurality of interwoven wires has a cross-section having a second tapered point. ### Claim 11 (depends on 10) The implantable medical device of claim 10, wherein the second tapered point extends inward further than the outer diameter of portions of the covering layer that extend between the adjacent wires. ### Claim 12 (depends on 10) The implantable medical device of claim 10, wherein the second tapered point extends inward further than the inner diameter of portions of the covering layer that extend between the adjacent wires. ### Claim 13 (depends on 10) The implantable medical device of claim 10, wherein the cross-section of the at least one of the plurality of interwoven wires further comprises a third tapered point. ### Claim 14 (depends on 9) The implantable medical device of claim 9, wherein the cross-section of the at least one of the plurality of interwoven wires is triangular. ### Claim 15 (depends on 9) The implantable medical device of claim 9, wherein an inner diameter of the framework is radially inward of the inner diameter of the covering layer. ### Claim 16 (depends on 9) The implantable medical device of claim 9, wherein the at least one of the plurality of interwoven wires includes a face parallel to the central longitudinal axis. ### Claim 17 (depends on 16) The implantable medical device of claim 16, wherein the face is radially inward of the inner diameter of portions of the covering layer that extend between the adjacent wires. ### Claim 18 An implantable medical device for implantation within a passageway of a patient, the device comprising: a tubular framework including a plurality of interwoven wires, at least one of the plurality of interwoven wires comprising a cross-section having a first tapered point oriented radially outward from a central longitudinal axis of the framework, the cross-section of the at least one wire taken transverse to a longitudinal length of the wire such that the first tapered point extends along the longitudinal length of the wire; and a covering layer disposed over a portion of the framework and extending between adjacent wires of the plurality of interwoven wires included in the portion of the framework; wherein the first tapered point extends radially outward further than an outer diameter of portions of the covering layer that extend between the adjacent wires, and wherein the first tapered point is embedded in the covering layer and forms a radially outward extending bump in an outer wall surface of the covering layer that extends radially outward further than the first tapered point. ### Claim 19 (depends on 18) The implantable medical device of claim 18, wherein the cross-section of the at least one of the plurality of interwoven wires has a second tapered point. ### Claim 20 (depends on 18) The implantable medical device of claim 18, wherein the cross-section of the at least one of the plurality of interwoven wires is triangular.