# US 10,117,761 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 10,117,761 B2 - Document ID: US10117761B2 - Status: Granted - Kind: B2 - Application number: 14/974,069 - Filed: 2015-12-18 - Published: 2016-06-23 - Granted: 2018-11-06 - Earliest claimed: 2014-12-19 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientific Scimed, Inc. - Inventors: Seamus F. O'Shaughnessy; Gary J. Leanna; Jason Weiner; Dane T. Seddon; Sean P. Fleury - Web page: https://patentgrep.com/patent/US10117761B2 ## CPC - A61F 2/848: having means for fixation to the vessel wall, e.g. barbs - A61F 2/04: Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts (A61F2/18, A61F2/20 take precedence; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95) - A61F 2/86: Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure - A61F 2/92: Stents in the form of a rolled-up sheet expanding after insertion into the vessel {, e.g. with a spiral shape in cross-section} - B21C 37/065: {starting from a specific blank, e.g. tailored blank} - A61F 2/91: made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes - A61F 2002/0081: {directly machined on the prosthetic surface, e.g. holes, grooves (A61F2/30771 takes precedence)} - A61F 2002/825: {having longitudinal struts} - A61F 2002/8483: {Barbs} - A61F 2002/8486: {provided on at least one of the ends} - A61F 2220/0016: with sharp anchoring protrusions, e.g. barbs, pins, spikes - A61F 2230/0023: triangular - A61F 2240/001: Designing or manufacturing processes - 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) - B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL ## Abstract An endoprosthesis includes an expandable tubular framework having a first end, a second end, and a lumen extending therethrough along a longitudinal axis. The expandable tubular framework includes a plurality of interconnected struts. The interconnected struts include a radially outward face which includes a plurality of anti-migration grooves defining anti-migration teeth formed therebetween. The anti-migration teeth are configured to engage tissue to resist migration of the endoprosthesis within a body lumen. ## Claims ### Claim 1 An endoprosthesis comprising: an expandable tubular framework having a first end, a second end, and a lumen extending therethrough along a longitudinal axis, the lumen defining an inner surface, the expandable tubular framework including a plurality of interconnected struts and openings extending between the inner surface and a radially outward surface of the interconnected struts, wherein an entirety of the expandable tubular framework is formed from a monolithic tubular member subsequent removal of material from the tubular member to form the openings; wherein the radially outward surface of the interconnected struts includes a plurality of anti-migration grooves defining anti-migration teeth formed therebetween, wherein a portion of the interconnected struts is devoid of anti-migration teeth, the portion devoid of anti-migration teeth having a first thickness measured between the inner surface and the radially outward surface, wherein a point defining a radially outward-most extent of the anti-migration teeth is located on the radially outward surface of the interconnected struts such that a second thickness measured between the inner surface and the point defining the radially outward-most extent of the anti-migration teeth is the same as the first thickness; wherein the anti-migration teeth are configured to engage tissue to resist migration of the endoprosthesis within a body lumen. ### Claim 2 (depends on 1) The endoprosthesis of claim 1, wherein each of the anti-migration teeth include a first flank and a second flank converging toward the first flank. ### Claim 3 (depends on 2) The endoprosthesis of claim 2, wherein the first flank slopes radially outward toward the first end at an acute angle with respect to the longitudinal axis. ### Claim 4 (depends on 3) The endoprosthesis of claim 3, wherein the second flank slopes radially outward toward the first end at an acute angle with respect to the longitudinal axis. ### Claim 5 (depends on 4) The endoprosthesis of claim 4, wherein the angle of the first flank is less than the angle of the second flank. ### Claim 6 (depends on 2) The endoprosthesis of claim 2, wherein the first flank and the second flank converge to a point along a line. ### Claim 7 (depends on 2) The endoprosthesis of claim 2, wherein the anti-migration teeth further include a flat surface intersecting both the first flank and the second flank. ### Claim 8 (depends on 2) The endoprosthesis of claim 2, wherein a first portion of the anti-migration teeth include at least one of the first and second flanks angled toward the first end, and a second portion of the anti-migration teeth include at least one of the first and second flanks angled toward the second end. ### Claim 9 (depends on 8) The endoprosthesis of claim 8, wherein the first portion of the anti-migration teeth are located proximate the first end and the second portion of the anti-migration teeth are located proximate the second end. ### Claim 10 (depends on 8) The endoprosthesis of claim 8, wherein the first portion of the anti-migration teeth are located proximate the second end and the second portion of the anti-migration teeth are located proximate the first end. ### Claim 11 (depends on 8) The endoprosthesis of claim 8, wherein the expandable tubular framework is devoid of anti-migration teeth between the first portion of anti-migration teeth and the second portion of anti-migration teeth. ### Claim 12 An endoprosthesis comprising: an expandable tubular framework having a first end, a second end, and a lumen extending therethrough along a longitudinal axis, the lumen defining an inner surface, the expandable tubular framework including a plurality of interconnected struts and openings extending between the inner surface and a radially outward surface of the interconnected struts, wherein an entirety of the expandable tubular framework is formed from a monolithic tubular member subsequent removal of material from the tubular member; wherein the radially outward surface includes a plurality of anti-migration grooves cut into the radially outward surface of the interconnected struts to define anti-migration teeth formed therebetween; wherein the anti-migration teeth include a first flank and a second flank converging toward the first flank, wherein the second flank of a first anti-migration tooth meets the first flank of an adjacent second anti-migration tooth at a point defining a lower end of the groove between the first and second teeth; wherein a first portion of the anti-migration teeth adjacent the first end of the expandable tubular framework are angled in a first direction and a second portion of the anti-migration teeth adjacent the second end of the expandable tubular framework are angled in a second direction opposite the first direction; wherein the anti-migration teeth are configured to engage tissue to resist migration of the endoprosthesis within a body lumen. ### Claim 13 (depends on 12) The endoprosthesis of claim 12, wherein the first portion of the anti-migration teeth include the first and second flanks angled toward the first end, and the second portion of the anti-migration teeth include the first and second flanks angled toward the second end. ### Claim 14 (depends on 12) The endoprosthesis of claim 12, wherein the first flank of the first portion of the anti-migration teeth slopes radially outward toward the first end at a first acute angle with respect to the longitudinal axis and the first flank of the second portion of the anti-migration teeth slopes radially outward toward the second end at the first acute angle with respect to the longitudinal axis. ### Claim 15 (depends on 14) The endoprosthesis of claim 14, wherein the second flank of the first portion of the anti-migration teeth slopes radially outward toward the first end at a second acute angle with respect to the longitudinal axis and the second flank of the second portion of the anti-migration teeth slopes radially outward toward the second end at the second acute angle with respect to the longitudinal axis. ### Claim 16 (depends on 15) The endoprosthesis of claim 15, wherein the first acute angle is less than the second acute angle. ### Claim 17 (depends on 12) The endoprosthesis of claim 12, wherein the anti-migration teeth further include a flat surface intersecting both the first flank and the second flank. ### Claim 18 A method of forming an endoprosthesis, comprising: forming an expandable tubular framework from a monolithic tubular member, the expandable tubular framework having a first end, a second end, and a lumen extending therethrough along a longitudinal axis, the lumen defining an inner surface, the expandable tubular framework including a plurality of interconnected struts and openings extending between the inner surface and a radially outward surface of the interconnected struts, wherein an entirety of the expandable tubular framework is formed from the monolithic tubular member subsequent removal of material from the tubular member; and forming a plurality of anti-migration grooves in the radially outward facing surface, thereby defining a plurality of anti-migration teeth between adjacent anti-migration grooves, wherein a portion of the interconnected struts is devoid of anti-migration teeth, the portion devoid of anti-migration teeth having a first thickness measured between the inner surface and the radially outward facing surface, wherein a point defining a radially outward-most extent of the anti-migration teeth is located on the radially outward surface of the interconnected struts such that a second thickness measured between the inner surface and the point defining the radially outward-most extent of the anti-migration teeth is the same as the first thickness. ### Claim 19 (depends on 18) The method of claim 18, wherein: the anti-migration teeth include a first flank and a second flank converging toward the first flank; the first flank slopes radially outward toward the first end at an acute angle from the longitudinal axis; the second flank slopes radially outward toward the first end at an acute angle from the longitudinal axis; and the angle of the first flank is less than the angle of the second flank. ### Claim 20 (depends on 18) The method of claim 18, wherein the anti-migration teeth further include a flat surface intersecting both the first flank and the second flank.