# US 12,213,899 B2 · Stent > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,899 B2 - Document ID: US12213899B2 - Status: Granted - Kind: B2 - Application number: 18/402,217 - Filed: 2024-01-02 - Published: 2024-04-25 - Granted: 2025-02-04 - Earliest claimed: 2018-04-09 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientific Scimed, Inc. - Inventors: Gary Gilmartin; Martyn G. Folan; Geraldine Toner; Paul E. Tierney; David Collins - Web page: https://patentgrep.com/patent/US12213899B2 ## CPC - A61F 2/90: characterised by a net-like or mesh-like structure - 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 2/88: the wire-like elements formed as helical or spiral coils - D04B 1/225: {Elongated tubular articles of small diameter, e.g. coverings or reinforcements for cables or hoses} - D04C 1/06: Braid or lace serving particular purposes - A61F 2/966: with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod - A61F 2002/045: {Stomach, intestines} - A61F 2210/0014: using shape memory or superelastic materials, e.g. nitinol - A61F 2220/0075: sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable - A61F 2230/0045: Omega-shaped - A61F 2250/0007: for adjusting length - A61F 2250/001: for adjusting a diameter - A61F 2250/0012: for adjusting elasticity, flexibility, spring rate or mechanical tension - A61F 2250/0017: differing in yarn density - A61F 2250/0098: radio-opaque, e.g. radio-opaque markers - D10B 2509/06: Vascular grafts; stents - 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) - D04B: KNITTING - D04C: BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE (machines for making soles from strips of material A43D29/00; cane working B27J1/00) - D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES ## Abstract An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member configured to move between a collapsed configuration and an expanded configuration. The elongated tubular member may comprise at least one twisted filament, such as a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, or a plurality of helical filaments twisted with a plurality of longitudinal filaments. ## Claims ### Claim 1 A stent, the stent comprising: an elongated tubular member comprising a knitted filament having a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, the plurality of twisted knit stitches each include a loop portion and an overlapping base region, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration; wherein in the collapsed configuration the plurality of twisted knit stitches have a first profile and in the expanded configuration the plurality of twisted knit stitches have a second profile different from the first profile; and wherein the elongated tubular member comprises a plurality of rows, wherein some of the plurality of rows have a first number of twisted knit stitches and some of the plurality of rows have a second number of twisted knit stitches less than the first number of twisted knit stitches. ### Claim 2 (depends on 1) The stent of claim 1, wherein a length of the intermediate rung portions in the collapsed configuration is less than a length of the intermediate rung portions in the expanded configuration. ### Claim 3 (depends on 1) The stent of claim 1, wherein at least some of the plurality of twisted knit stitches are suspended from a twisted knit stitch in a preceding row. ### Claim 4 (depends on 1) The stent of claim 1, wherein at least some of the plurality of twisted knit stitches are suspended from an intermediate rung portion of a preceding row. ### Claim 5 (depends on 1) The stent of claim 1, wherein the elongated tubular member is formed from a single filament interwoven with itself to form the plurality of twisted knit stitches and intermediate rung portions. ### Claim 6 (depends on 1) The stent of claim 1, wherein the elongated tubular member has at least a first portion and a second portion, the second portion having a lower radial force in the expanded configuration than the first portion. ### Claim 7 (depends on 6) The stent of claim 6, wherein the plurality of rows extend circumferentially around the elongated tubular member, wherein the first portion includes some of the plurality of rows having the first number of twisted knit stitches and the second portion includes some of the plurality of rows having the second number of twisted knit stitches, wherein the twisted knit stitches form axially extending columns. ### Claim 8 (depends on 7) The stent of claim 7, wherein the plurality of rows in the first portion have a twisted knit stitch in every column and the plurality of rows in the second portion have a twisted knit stitch in every other column. ### Claim 9 (depends on 8) The stent of claim 8, wherein adjacent rows in the second portion have twisted knit stitches in alternating columns. ### Claim 10 (depends on 9) The stent of claim 9, wherein the twisted knit stitches in the second portion form a spiral pattern. ### Claim 11 (depends on 8) The stent of claim 8, wherein adjacent rows in the second portion have twisted knit stitches in aligned columns. ### Claim 12 (depends on 8) The stent of claim 8, further comprising a third portion having the same radial force as the first portion, wherein the second portion is disposed between the first and third portions. ### Claim 13 A stent, the stent comprising: an elongated tubular member comprising a knitted filament defining a plurality of twisted knit stitches with intermediate rung portions extending between adjacent twisted knit stitches, the plurality of twisted knit stitches each include a loop portion and an overlapping base region, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration; and wherein the elongated tubular member comprises a plurality of circumferential rows defining a first portion and a second portion, wherein the plurality of circumferential rows in the first portion define a first plurality of twisted knit stitches forming a plurality of axial columns, and the plurality of circumferential rows in the second portion define a second plurality of twisted knit stitches disposed in less than every column. ### Claim 14 (depends on 13) The stent of claim 13, wherein at least some of the plurality of twisted knit stitches are suspended from a twisted knit stitch in a preceding row and at least some of the plurality of twisted knit stitches are suspended from an intermediate rung portion of a preceding row. ### Claim 15 (depends on 13) The stent of claim 13, wherein the plurality of circumferential rows in the first portion have a twisted knit stitch in every column and the plurality of circumferential rows in the second portion have a twisted knit stitch in every other column. ### Claim 16 (depends on 13) The stent of claim 13, wherein adjacent rows in the second portion have twisted knit stitches in alternating columns. ### Claim 17 (depends on 13) The stent of claim 13, wherein the elongated tubular member is formed from a single filament interwoven with itself to form the plurality of twisted knit stitches and intermediate rung portions. ### Claim 18 A stent, the stent comprising: an elongated tubular member comprising a knitted filament defining a plurality of twisted knit stitches each including a loop portion and an overlapping base region, with intermediate rung portions extending between adjacent twisted knit stitches, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration; and wherein the elongated tubular member comprises a plurality of circumferential rows defining a first portion and a second portion, the second portion having a lower radial force in the expanded configuration than the first portion, wherein the plurality of circumferential rows in the first portion define a first plurality of twisted knit stitches forming a plurality of axial columns, and the plurality of circumferential rows in the second portion define a second plurality of twisted knit stitches in every other column.