ES2614158T3 - Sistema para formar púas en una sutura - Google Patents

Sistema para formar púas en una sutura Download PDF

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Publication number
ES2614158T3
ES2614158T3 ES10250848.8T ES10250848T ES2614158T3 ES 2614158 T3 ES2614158 T3 ES 2614158T3 ES 10250848 T ES10250848 T ES 10250848T ES 2614158 T3 ES2614158 T3 ES 2614158T3
Authority
ES
Spain
Prior art keywords
suture
assembly
barbed suture
suture system
knife
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
ES10250848.8T
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English (en)
Inventor
Nicholas Maiorino
Timothy Kosa
Mark Buchter
Keith Kroeber
Richard Casey Hart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covidien LP
Original Assignee
Covidien LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Covidien LP filed Critical Covidien LP
Application granted granted Critical
Publication of ES2614158T3 publication Critical patent/ES2614158T3/es
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/06Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
    • A61B17/06166Sutures
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00526Methods of manufacturing
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/06Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
    • A61B17/06166Sutures
    • A61B2017/06176Sutures with protrusions, e.g. barbs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/20Fence barb making
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49998Work holding
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/53Means to assemble or disassemble
    • Y10T29/53991Work gripper, anvil, or element
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/02Other than completely through work thickness
    • Y10T83/0207Other than completely through work thickness or through work presented
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/02Other than completely through work thickness
    • Y10T83/0267Splitting
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/04Processes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/505Operation controlled by means responsive to product

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Una estación de corte de púas (100) que comprende: un ensamblaje de transporte de sutura (200) para soportar por lo menos una primera sutura (10); por lo menos un primer ensamblaje de cuchillos (300) para formar púas (16) en la por lo menos primera sutura (10); y por lo menos una primera abrazadera y el ensamblaje de posición (400) para aproximar la por lo menos primera sutura (10) hacia el por lo menos primer ensamblaje de cuchillos (300); caracterizada por que: el ensamblaje de transporte de sutura (200) incluye por lo menos un primer par de motores rotativos (224, 226) configurados para rotar por lo menos la primera sutura (10) a lo largo de su eje longitudinal.

Description

imagen1
imagen2
imagen3
imagen4
imagen5

Claims (1)

  1. imagen1
ES10250848.8T 2009-04-29 2010-04-28 Sistema para formar púas en una sutura Active ES2614158T3 (es)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US17372309P 2009-04-29 2009-04-29
US173723P 2009-04-29
US726871 2010-03-18
US12/726,871 US8402621B2 (en) 2009-04-29 2010-03-18 System and method for forming barbs on a suture

Publications (1)

Publication Number Publication Date
ES2614158T3 true ES2614158T3 (es) 2017-05-29

Family

ID=42338225

Family Applications (2)

Application Number Title Priority Date Filing Date
ES16205651T Active ES2930031T3 (es) 2009-04-29 2010-04-28 Sistema para formar barbas en una sutura
ES10250848.8T Active ES2614158T3 (es) 2009-04-29 2010-04-28 Sistema para formar púas en una sutura

Family Applications Before (1)

Application Number Title Priority Date Filing Date
ES16205651T Active ES2930031T3 (es) 2009-04-29 2010-04-28 Sistema para formar barbas en una sutura

Country Status (7)

Country Link
US (5) US8402621B2 (es)
EP (2) EP3195810B1 (es)
JP (2) JP5584514B2 (es)
CN (2) CN101874747B (es)
AU (1) AU2010201323B2 (es)
CA (1) CA2699160C (es)
ES (2) ES2930031T3 (es)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2550978B1 (en) 2007-09-27 2014-04-30 Ethicon, LLC A system for cutting a retainer in a suture
EP2249712B8 (en) 2008-02-21 2018-12-26 Ethicon LLC Method and apparatus for elevating retainers on self-retaining sutures
US8402621B2 (en) 2009-04-29 2013-03-26 Covidien Lp System and method for forming barbs on a suture
US9044224B2 (en) 2010-04-12 2015-06-02 Covidien Lp Barbed medical device and method
EP2566401B1 (en) 2010-05-04 2018-06-20 Ethicon LLC Laser cutting system and methods for creating self-retaining sutures
CN103200882A (zh) 2010-11-09 2013-07-10 伊西康有限责任公司 紧急自固位缝合线和包装
RU2659454C2 (ru) 2011-03-23 2018-07-02 ЭТИКОН ЭлЭлСи Самоудерживающиеся нити с регулируемой петлей
US9011133B2 (en) 2011-04-29 2015-04-21 Covidien Lp Apparatus and method of forming barbs on a suture
US9687227B2 (en) 2011-04-29 2017-06-27 Covidien Lp Apparatus and method of forming barbs on a suture
US8640331B2 (en) 2011-05-31 2014-02-04 Covidien Lp Barbed sutures
US9241709B2 (en) 2011-05-31 2016-01-26 Covidien Lp Barbed sutures
US20130172931A1 (en) 2011-06-06 2013-07-04 Jeffrey M. Gross Methods and devices for soft palate tissue elevation procedures
US10650177B2 (en) 2012-12-20 2020-05-12 Comsol Ab System and method for creating application interfaces for multiphysics modeling
US9597426B2 (en) 2013-01-25 2017-03-21 Covidien Lp Hydrogel filled barbed suture
CN103144131B (zh) * 2013-03-20 2015-01-21 东华大学 自锁紧式缝合线制备装置及其制备方法
KR101550103B1 (ko) * 2013-11-07 2015-09-03 김춘동 수술용 실의 돌기 형성장치 및 그 방법
KR101719256B1 (ko) * 2014-03-21 2017-03-23 유원석 고착형 미늘 봉합사 및 그 제조방법
US10500303B2 (en) 2014-08-15 2019-12-10 Tepha, Inc. Self-retaining sutures of poly-4-hydroxybutyrate and copolymers thereof
KR101611880B1 (ko) * 2014-11-20 2016-04-14 이인숙 와이어 가공 장치
CN104608172B (zh) * 2015-02-12 2017-07-07 刘宁 一种在缝合线上形成单向或者双向倒刺的装置
EP3085820B1 (en) 2015-04-22 2017-12-20 Sofradim Production A method for forming a barbed suture and the barbed suture thus obtained
EP3085332B1 (en) 2015-04-23 2019-02-27 Sofradim Production Package for a surgical mesh
TWI595866B (zh) * 2016-08-11 2017-08-21 Feather line manufacturing equipment
CN106192122B (zh) * 2016-08-31 2018-12-04 浙江鸿辰新材料科技有限公司 树枝型纤维丝及成型装置
CN106725674A (zh) * 2016-12-14 2017-05-31 天津昕黎科技有限公司 一种医疗装置复合倒刺加工用的装置及加工方法
CN107336271B (zh) * 2017-03-09 2023-06-23 上海英诺伟医疗器械股份有限公司 一种引流管截取装置和方法
KR101841392B1 (ko) * 2017-06-19 2018-05-04 박범수 리프팅 시술용 원실 터닝장치
CN107199585B (zh) * 2017-07-31 2024-03-12 许芮 一种线材倒刺裁切成型装置
AU2018346453A1 (en) * 2017-10-06 2020-04-16 Thread & Lift Surgical thread
CN108466303A (zh) * 2018-05-25 2018-08-31 浙江益医疗器械有限公司 一种整形美容用锯齿线自动切线机
CN108836408A (zh) * 2018-07-04 2018-11-20 于云龙 一种用于埋线提拉的锯齿缝合线(带刺)及其制作方法
CN110849238B (zh) * 2019-12-05 2021-04-09 江西龙腾生物高科技有限公司 一种医用胶原蛋白缝合线线体长度测量装置
CN111134748B (zh) * 2020-01-03 2021-06-15 浙江微度医疗器械有限公司 一种在缝合线上形成单向或者双向倒刺的装置及方法
CN111184545B (zh) * 2020-01-08 2021-04-16 浙江微度医疗器械有限公司 一种在缝合线上形成鱼骨的装置及方法
CN113069161B (zh) * 2021-03-18 2022-10-04 南京普立蒙医疗科技有限公司 一种提高良品率的倒刺缝合线切割设备
CN113413184B (zh) * 2021-06-28 2022-07-05 梁一凡 一种倒刺线切割机器
CN115256524B (zh) * 2022-06-07 2024-06-21 南通华利康医疗器械有限公司 一种压线式缝合线倒刺切割机构
CN115213947B (zh) * 2022-06-07 2024-04-19 南通华利康医疗器械有限公司 一种缝合线倒刺加工机构
WO2024033763A1 (en) 2022-08-10 2024-02-15 Covidien Lp Looped suture devices and methods of forming looped suture devices

Family Cites Families (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6241747B1 (en) 1993-05-03 2001-06-05 Quill Medical, Inc. Barbed Bodily tissue connector
US8795332B2 (en) 2002-09-30 2014-08-05 Ethicon, Inc. Barbed sutures
US5732529A (en) * 1996-03-29 1998-03-31 Ethicon, Inc. Apparatus for feeding foil stock in a process for making sealed sterile packages
US6270517B1 (en) 2000-02-04 2001-08-07 Gregory R. Brotz Suture assembly and method
US6599310B2 (en) 2001-06-29 2003-07-29 Quill Medical, Inc. Suture method
US7056331B2 (en) 2001-06-29 2006-06-06 Quill Medical, Inc. Suture method
US6848152B2 (en) 2001-08-31 2005-02-01 Quill Medical, Inc. Method of forming barbs on a suture and apparatus for performing same
US20030149447A1 (en) 2002-02-01 2003-08-07 Morency Steven David Barbed surgical suture
US8100940B2 (en) 2002-09-30 2012-01-24 Quill Medical, Inc. Barb configurations for barbed sutures
US20040088003A1 (en) 2002-09-30 2004-05-06 Leung Jeffrey C. Barbed suture in combination with surgical needle
US7624487B2 (en) 2003-05-13 2009-12-01 Quill Medical, Inc. Apparatus and method for forming barbs on a suture
US20050161531A1 (en) 2004-01-28 2005-07-28 Greer Lester R.Jr. Texture material for covering a repaired portion of a textured surface
CA2566438C (en) 2004-05-14 2014-12-09 Angiotech Pharmaceuticals, Inc. Suture methods and devices
US8267961B2 (en) 2005-06-29 2012-09-18 Ethicon, Inc. Barbed suture
US20070224237A1 (en) 2006-03-24 2007-09-27 Julia Hwang Barbed sutures having a therapeutic agent thereon
US7850894B2 (en) 2006-05-04 2010-12-14 Ethicon, Inc. Tissue holding devices and methods for making the same
CH697273B1 (fr) 2006-07-26 2008-07-31 Detra Sa Dispositif d'échappement électromécanique et pièce d'horlogerie munie d'un tel dispositif
ES2329092T3 (es) 2006-09-06 2009-11-20 Tyco Healthcare Group, Lp Suturas de puas.
CA2665209C (en) 2006-10-03 2016-01-05 Alure Medical, Inc. Minimally invasive tissue support
US20080195147A1 (en) 2007-02-09 2008-08-14 Tyco Healthcare Group Lp Surface eroding barbed sutures
US20080221618A1 (en) 2007-03-09 2008-09-11 Gaoyuan Chen Co-extruded tissue grasping monofilament
ITRM20070162A1 (it) 2007-03-27 2008-09-28 Promoitalia Internat Srl Apparato di intaglio per fili chirurgici
US8915943B2 (en) 2007-04-13 2014-12-23 Ethicon, Inc. Self-retaining systems for surgical procedures
KR100880679B1 (ko) * 2007-04-30 2009-01-30 김종환 주름살 제거용 특수사 제조장치
US20080281357A1 (en) 2007-05-09 2008-11-13 An-Min Jason Sung Looped tissue-grasping device
US8747436B2 (en) 2007-06-13 2014-06-10 Ethicon, Inc. Bi-directional barbed suture
US8562644B2 (en) 2007-08-06 2013-10-22 Ethicon, Inc. Barbed suture with non-symmetric barbs
US8161618B2 (en) * 2007-09-17 2012-04-24 Tyco Healthcare Group Lp Method of forming barbs on a suture
US8273105B2 (en) * 2008-02-20 2012-09-25 Tyco Healthcare Group Lp Compound barb medical device and method
EP2249712B8 (en) 2008-02-21 2018-12-26 Ethicon LLC Method and apparatus for elevating retainers on self-retaining sutures
US20090248066A1 (en) 2008-03-28 2009-10-01 David Hjalmar Wilkie Elastic barbed suture and tissue support system
EP3530196A1 (en) 2008-04-15 2019-08-28 Ethicon, LLC Self-retaining sutures with bi-directional retainers or uni-directional retainers
EP2279013B1 (en) 2008-04-24 2015-08-05 Ethicon, LLC Shape-memory self-retaining sutures, methods of manufacture, and methods of use
US9011489B2 (en) 2008-05-14 2015-04-21 Boston Scientific Scimed, Inc. Surgical composite barbed suture
US8821539B2 (en) 2008-07-23 2014-09-02 Ethicon, Inc. Collapsible barbed sutures having reduced drag and methods therefor
US8402621B2 (en) 2009-04-29 2013-03-26 Covidien Lp System and method for forming barbs on a suture

Also Published As

Publication number Publication date
CN101874747B (zh) 2014-09-17
US20130218204A1 (en) 2013-08-22
US8402621B2 (en) 2013-03-26
US9572569B2 (en) 2017-02-21
US20150135928A1 (en) 2015-05-21
EP2245992B1 (en) 2017-01-04
JP5584514B2 (ja) 2014-09-03
CA2699160C (en) 2017-05-16
US20100275750A1 (en) 2010-11-04
US20170135694A1 (en) 2017-05-18
EP2245992A1 (en) 2010-11-03
CA2699160A1 (en) 2010-10-29
CN104188700B (zh) 2016-09-28
CN104188700A (zh) 2014-12-10
EP3195810B1 (en) 2022-11-02
US8966728B2 (en) 2015-03-03
AU2010201323A1 (en) 2010-11-18
ES2930031T3 (es) 2022-12-05
CN101874747A (zh) 2010-11-03
EP3195810A2 (en) 2017-07-26
JP5729790B2 (ja) 2015-06-03
AU2010201323B2 (en) 2014-05-08
JP2014158876A (ja) 2014-09-04
JP2010259786A (ja) 2010-11-18
US10278693B2 (en) 2019-05-07
US20190209169A1 (en) 2019-07-11
US11000273B2 (en) 2021-05-11
EP3195810A3 (en) 2017-09-06

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