# US 11,098,422 B2 · Method for forming a barbed suture and the barbed suture thus obtained > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,098,422 B2 - Document ID: US11098422B2 - Status: Granted - Kind: B2 - Application number: 16/208,728 - Filed: 2018-12-04 - Published: 2019-04-11 - Granted: 2021-08-24 - Earliest claimed: 2015-04-22 - Assignees: Sofradim Production - Applicants: Sofradim Production - Inventors: Pierre Bailly; Alfredo Meneghin; Sebastien Francois; Xavier Couderc - Web page: https://patentgrep.com/patent/US11098422B2 ## CPC - D04B 21/202: {warp knitted yarns} - A61B 17/06166: {Sutures (suture materials A61L17/00; manufacture of artificial threads D01D; treatment of threads D06M)} - B26D 3/08: Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising - A61B 2017/00526: {Methods of manufacturing} - A61B 2017/06176: {with protrusions, e.g. barbs} - D10B 2509/04: Sutures - D04B: KNITTING - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - B26D: CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING (for growing crops or plants A01D, A01G; for fodder or straw A01F; for bulk butter A01J; for dough A21C; slaughtering A22B; for tobacco, cigars or cigarettes A24; marking-out, perforating or making buttonholes A41H25/00; manufacturing footwear A43D; brushmaking A46D; surgery A61B; disintegrating, mincing or shredding in general B02C; cutting wire, making pins or nails B21F, B21G; of the kind used formetal B23; cutting by abrasive fluid jets B24C5/02; hand-held cutting tools B26B; perforating, cutting-out, stamping-out or punching, or severing by means other than cutting B26F; for wood B27; for stone B28D; working of plastics or substances in a plastic state B29; making boxes, cartons, envelopes or bags, of paper or similarly worked materials, e.g. metal foil, B31B; article or web delivery apparatus incorporating cutting or line-perforating devices B65H35/00; for leather or upholstery B68, C14B; for glass C03B; making matches C06F; for peat C10F; for sugar C13B45/00; for textile materials D06H; civil engineering, building, mining, see Section E; for light guides G02B6/25; cutting processed photographic material G03D15/04) - D10B: INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES ## Abstract The invention relates to a method for forming a barbed suture (10) comprising: a) producing a knit by knitting together i) a set of chain stitch yarns (1) producing chain stitches and ii) a set of monofilament weft yarns completing weft stitches with at least one of said chain stitches, thereby producing at least one weft stitched chain stitch (6), b) cutting the knit along the warp direction on both sides of said weft stitched chain stitch, so as to isolate said weft stitched chain stitch from the rest of the produced knit, the chain stitch yarn of said at least one weft stitched chain stitch forming the elongate body (9) of the barbed suture and the monofilament cuts (7) extending from said weft stitches of said one weft stitched chain stitch forming the barbs (8) of said barbed suture. ## Claims ### Claim 1 A barbed suture comprising an elongate body made of a yarn of a first biocompatible material, provided with barbs extending substantially radially out from said elongate body, said barbs being monofilament cuts made of a second biocompatible material, where said monofilament cuts are stitched to said yarn forming said elongate body. ### Claim 2 (depends on 1) The barbed suture of claim 1, wherein the elongate body comprises a plurality of chain stitches formed from chain stitch yarns. ### Claim 3 (depends on 2) The barbed suture of claim 2, wherein the chain stitch yarns are monofilament yarns. ### Claim 4 (depends on 2) The barbed suture of claim 2, wherein the chain stitch yarns are multifilament yarns. ### Claim 5 (depends on 4) The barbed suture of claim 4, wherein the multifilament chain stitch yarns have a tensile strength ranging from about 25 cN/dTex to about 40 cN/dTex. ### Claim 6 (depends on 2) The barbed suture of claim 2, wherein at least one of the chain stitches is combined with a weft stitch of a weft yarn to form a weft stitched chain stitch along the elongate body. ### Claim 7 (depends on 6) The barbed suture of claim 6, wherein the chain stitch of the weft stitched chain stitch forms the elongate body and the monofilament cuts are formed from the weft stitch of the weft stitched chain stitch. ### Claim 8 (depends on 6) The barbed suture of claim 6, wherein the chain stitch yarns are polyethylene multifilament yarns having a tensile strength of about 35 cN/dTex and the weft yarns are polypropylene monofilaments. ### Claim 9 (depends on 6) The barbed suture of claim 6, wherein the weft stitched chain stitch is heat-set. ### Claim 10 (depends on 6) The barbed suture of claim 6, wherein the weft stitched chain stitch is twisted. ### Claim 11 (depends on 6) The barbed suture of claim 6, wherein the weft stitched chain stitch is stretched. ### Claim 12 (depends on 1) The barbed suture of claim 1, wherein the first biocompatible material and the second biocompatible material are each selected from the group consisting in polyethylene, polypropylene, polyester such as polyethylene terephthalates, polyamide, silicone, polyether ether ketone (PEEK), polyarylether ether ketone (PAEK) polylactic acid (PLA), polycaprolactone (PCL), polydioxanone (PDO), trimethylene carbonate (TMC), polyvinyl alcohol (PVA), polyhydroxyalkanoate (PHA), polyglycolic acid (PGA), copolymers of these materials, and mixtures thereof. ### Claim 13 A barbed suture comprising a knit elongate body including at least one weft stitched chain stitch, and at least one barb extending from the knit elongate body, the at least one barb including a monofilament cut formed from a weft stitch of the weft stitched chain stitch. ### Claim 14 (depends on 13) The barbed suture of claim 13, wherein the knit elongate body further comprises a plurality of chain stitches formed from chain stitch yarns. ### Claim 15 (depends on 14) The barbed suture of claim 14, wherein the chain stitch yarns are monofilament yarns. ### Claim 16 (depends on 14) The barbed suture of claim 14, wherein the chain stitch yarns are multifilament yarns. ### Claim 17 (depends on 16) The barbed suture of claim 16, wherein the multifilament chain stitch yarns have a tensile strength ranging from about 25 cN/dTex to about 40 cN/dTex. ### Claim 18 (depends on 14) The barbed suture of claim 14, wherein the chain stitch yarns are polyethylene multifilament yarns having a tensile strength of about 35 cN/dTex and the weft stitch is formed from weft yarns made of polypropylene monofilaments. ### Claim 19 (depends on 13) The barbed suture of claim 13, wherein the weft stitched chain stitch is heat-set. ### Claim 20 (depends on 13) The barbed suture of claim 13, wherein the weft stitched chain stitch is twisted. ### Claim 21 (depends on 13) The barbed suture of claim 13, wherein the weft stitched chain stitch is stretched. ### Claim 22 (depends on 13) The barbed suture of claim 13, wherein one or more of the elongate body or the at least one barb is made from a bioabsorbable material. ### Claim 23 (depends on 13) The barbed suture of claim 13, wherein an integrity of the elongate body is unaffected by the one or more barbs.