# US 2019/0167453 A1 · Controlled ingrowth feature for antimigration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0167453 A1 - Document ID: US20190167453A1 - Status: Published application - Kind: A1 - Application number: 16/263,353 - Filed: 2019-01-31 - Published: 2019-06-06 - Earliest claimed: 2014-10-02 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientific Scimed, Inc. - Inventors: Harris Colby; Stan R. Gilbert; John A. Hingston; William Bertolino; Claude O. Clerc; Petru Andrei - Web page: https://patentgrep.com/patent/US20190167453A1 ## CPC - A61F 2/848: having means for fixation to the vessel wall, e.g. barbs - A61F 2/0077: {Special surfaces of prostheses, e.g. for improving ingrowth (A61F2/30767 takes precedence)} - A61F 2/07: Stent-grafts - A61F 2/90: characterised by a net-like or mesh-like structure - A61F 2/915: with bands having a meander structure, adjacent bands being connected to each other - A61F 2/88: the wire-like elements formed as helical or spiral coils - A61F 2/89: the wire-like elements comprising two or more adjacent rings flexibly connected by separate members - A61F 2220/0008: Fixation appliances for connecting prostheses to the body - A61F 2230/0013: Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped - A61F 2230/0069: cylindrical - A61F 2250/0026: differing in surface structures - A61F 2250/0051: differing in tissue ingrowth capacity, e.g. made from both ingrowth-promoting and ingrowth-preventing parts - 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 A tubular prosthesis that includes a scaffolding formed by at least one scaffolding filament; a cover; and at least one controlled ingrowth feature constructed and arranged to abut an inner surface of a lumen wall when the prosthesis is implanted in the body lumen. The controlled ingrowth feature may extend inwards or outwards from the prosthesis outer surface. The controlled ingrowth feature may be formed by a scaffolding filament; by a separate filament; by the cover; and combinations thereof. ## Claims ### Claim 1 A stent comprising: a tubular scaffolding expandable from a compressed delivery state to an expanded implanted state, the scaffolding extending between first and second ends of the stent, the scaffolding having an outer surface and an inner surface, wherein the scaffolding defines a plurality of openings extending between the inner and outer surfaces; and a cover disposed on the scaffolding, the stent including a first portion in which the cover covers and contacts at least one of the inner and outer surfaces of the scaffolding, and a second portion in which a section of the cover extends inward of the scaffolding and is spaced radially inward away from the inner surface of the scaffolding to define a controlled tissue ingrowth feature. ### Claim 2 (depends on 1) The stent of claim 1, wherein the controlled tissue ingrowth feature is formed only by the cover. ### Claim 3 (depends on 1) The stent of claim 1, wherein in the first portion of the stent, the cover covers only the outer surface of the scaffolding. ### Claim 4 (depends on 3) The stent of claim 3, wherein an outer surface of the stent is defined only by the cover. ### Claim 5 (depends on 1) The stent of claim 1, wherein the first and second portions alternate along a length of the stent. ### Claim 6 (depends on 1) The stent of claim 1, wherein in the first portion of the stent, the cover covers both the inner and outer surfaces of the scaffolding. ### Claim 7 (depends on 1) The stent of claim 1, wherein the section of the cover defining the controlled tissue ingrowth feature spans a single scaffold opening. ### Claim 8 (depends on 7) The stent of claim 7, wherein the single scaffold opening has a size greater than scaffold openings in the first portion of the stent. ### Claim 9 (depends on 1) The stent of claim 1, wherein the section of the cover defining the controlled tissue ingrowth feature spans a plurality of scaffold openings. ### Claim 10 (depends on 1) The stent of claim 1, wherein the cover occludes the scaffolding openings and prevents tissue ingrowth into a lumen of the stent. ### Claim 11 (depends on 1) The stent of claim 1, wherein the scaffolding comprises a braided mesh of filaments. ### Claim 12 (depends on 11) The stent of claim 11, wherein at least one of the filaments extending through the second portion is exposed from the cover. ### Claim 13 (depends on 1) The stent of claim 1, wherein the second portion includes a plurality of controlled tissue ingrowth features. ### Claim 14 (depends on 1) The stent of claim 1, wherein an entirety of the cover has a uniform thickness. ### Claim 15 A tubular stent having a lumen extending therethrough, the stent comprising: a tubular mesh scaffolding having a plurality of openings extending from an outer surface of the scaffolding to an inner surface of the scaffolding; and a cover disposed on the tubular mesh scaffolding, the cover occluding the openings and preventing tissue ingrowth into the lumen of the stent, a first portion of the cover extending axially across a first set of openings in the scaffolding, and a second portion of the cover extending radially inward of a second set of openings in the scaffolding and spaced radially inward away from the inner surface of the scaffolding to define a plurality of controlled tissue ingrowth features. ### Claim 16 (depends on 15) The stent of claim 15, wherein the plurality of controlled tissue ingrowth features are formed only by the cover. ### Claim 17 (depends on 15) The stent of claim 15, wherein filaments of the tubular mesh scaffolding defining the second set of openings are exposed from the cover. ### Claim 18 (depends on 15) The stent of claim 15, wherein the plurality of controlled tissue ingrowth features each span a single opening in the scaffolding. ### Claim 19 (depends on 15) The stent of claim 15, wherein the plurality of controlled tissue ingrowth features each span a plurality of openings in the scaffolding. ### Claim 20 A stent comprising: a tubular scaffolding formed of a plurality of filaments defining a plurality of openings therebetween, the plurality of openings extending from an outer surface to an inner surface of the tubular scaffolding; and a cover disposed on the scaffolding, the stent including a first portion in which a first section of the cover is in contact with filaments of the tubular scaffolding defining a first subset of the plurality of openings and extends across the first subset of the plurality of openings, and a second portion in which a second section of the cover extends inward of a second subset of openings of the plurality of openings and is spaced radially inward away from the inner surface of the scaffolding to define a controlled tissue ingrowth feature; wherein filaments of the tubular scaffolding defining the second subset of openings are exposed from the cover.