WO1983003349A1 - Vascular prosthesis - Google Patents

Vascular prosthesis Download PDF

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Publication number
WO1983003349A1
WO1983003349A1 PCT/GB1983/000090 GB8300090W WO8303349A1 WO 1983003349 A1 WO1983003349 A1 WO 1983003349A1 GB 8300090 W GB8300090 W GB 8300090W WO 8303349 A1 WO8303349 A1 WO 8303349A1
Authority
WO
WIPO (PCT)
Prior art keywords
helix
corrugations
tube
pitch
prosthesis
Prior art date
Application number
PCT/GB1983/000090
Other languages
French (fr)
Inventor
Limited J. & P. Coats
Original Assignee
Hood, Robert, Gordon
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 Hood, Robert, Gordon filed Critical Hood, Robert, Gordon
Priority to DE1983900955 priority Critical patent/DE104199T1/en
Publication of WO1983003349A1 publication Critical patent/WO1983003349A1/en
Priority to DK531983A priority patent/DK531983A/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • 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
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/118—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having arrangements for particular purposes, e.g. electrically conducting

Definitions

  • vascular prosthesis and particularly a prosthesis in the form of a tube of textile material to be used for. replacing a portion of a blood vessel in a human or animal body.
  • Vascular prostheses are well known and are customarily constructed of knitted tubes formed with circumferential corrugations.
  • the corrugations are provided for two reasons, one to allow the prosthesis to be extended in length during fitting and the other
  • a vascular prosthesis according to the invention comprises a tube of textile material formed with corrugations in the form of a primary helix and is characterized in that secondary corrugations in the form of a secondary helix of opposite and greater pitch than the primary helix are superposed on the corrugations of the primary helix.
  • one helix is of left hand or S pitch and the other helix is of right hand or Z pitch.
  • the tube of textile material may be formed by warp knitting, by weaving or by braiding and is preferably seamless.
  • a prosthesis according to the invention may be formed by winding a thread in one direction around the tube while it is held on a rigid former to delineate the primary helix then winding another thread around the tube in the opposite direction and with a greater pitch to delineate the secondary helix then applying axial pressure in opposite directions from the two ends whereby to reduce the length of the tube and cause the portions of the tube between the thread convolutions to bulge outwardly and form the corrugations and while the tube is held in this position heat-treating the material to set the tube material and cause the corrugations to be permanent.
  • FIG. 1 denotes a tube of textile material
  • 2 denotes a primary helix
  • 3 denotes a secondary helix superposed on the primary helix 2.
  • the dimensions of a typical prosthesis according to the invention are: minimum internal diameter - 10 mm, pitch of primary helix - 10 turns/cm, pitch of secondary helix — 2 turns/cm, depth of corrugations - O. ⁇ mm.
  • the corrugation depth given provides the required degree of stiffness and resistance to buckling and collapse in a prosthesis of the minimum diameter.
  • a known prosthesis of the same minimum diameter having a single set of corrugations would have required corrugations of at least 1.2 mm depth with a pitch of about 7 turns/cm. t .
  • the invention having two sets of contra-pitch corrugations of low amplitude presents much less impedence to blood flow through the tube and also a greater evenness in build up of fibrous tissue than a known vascular prosthesis of the same degree of
  • grafts having a"single set of corrugations of high amplitude.
  • a prosthesis according to the invention formed with corrugations of the same amplitude as a known vascular prosthesis has a greater degree of stiffness and resistance to buckling and

Abstract

A vascular prosthesis for replacing a portion of a blood vessel in a human or animal body comprises a tube (1) of textile material formed with corrugations in the form of a primary helix (2) and secondary corrugations in the form of a secondary helix (3) of pitch opposite and greater than the pitch of the primary helix superposed on the corrugations of the primary helix.

Description

YA§CULAR_P_ROSTHESIS
At The subject of this invention is a vascular prosthesis and particularly a prosthesis in the form of a tube of textile material to be used for. replacing a portion of a blood vessel in a human or animal body.
5 Vascular prostheses are well known and are customarily constructed of knitted tubes formed with circumferential corrugations. The corrugations are provided for two reasons, one to allow the prosthesis to be extended in length during fitting and the other
10 to provide rigidity against collapsing or buckling while maintaining adequate flexibility. For that reason it has heretofore been necessary to provide for any given diameter of graft corrugations of a certain minimum amplitude. The corrugations always present some
15 impedence to the flow of blood through the implanted .graft and for that reason it is desirable to have the amplitude of the corrugations as low as possible while providing the desired degree of stiffness and resistance to buckling and collapse.
20 It would obviously be of great advantage in the use of vascular grafts if there could be provided a corrugated tube having the same characteristics of stiffness and resistance to buckling and collapse but with a much lower amplitude of corrugations in
25 proportion to its diameter, or a greater degree of stuffness and resistance to buckling and collapse for a given proportion of amplitude of corrugations to internal diameter and it is an object of the present invention to provide such a vascular prosthesis.
30 A vascular prosthesis according to the invention comprises a tube of textile material formed with corrugations in the form of a primary helix and is characterized in that secondary corrugations in the form of a secondary helix of opposite and greater pitch than the primary helix are superposed on the corrugations of the primary helix.
For removal of doubt it is explained that one helix is of left hand or S pitch and the other helix is of right hand or Z pitch.
The tube of textile material may be formed by warp knitting, by weaving or by braiding and is preferably seamless.
A prosthesis according to the invention may be formed by winding a thread in one direction around the tube while it is held on a rigid former to delineate the primary helix then winding another thread around the tube in the opposite direction and with a greater pitch to delineate the secondary helix then applying axial pressure in opposite directions from the two ends whereby to reduce the length of the tube and cause the portions of the tube between the thread convolutions to bulge outwardly and form the corrugations and while the tube is held in this position heat-treating the material to set the tube material and cause the corrugations to be permanent.
A practical embodiment of a vascular prosthesis according to the invention is illustrated in the accompanying drawing in which 1 denotes a tube of textile material,2 denotes a primary helix and 3 denotes a secondary helix superposed on the primary helix 2.
The dimensions of a typical prosthesis according to the invention are: minimum internal diameter - 10 mm, pitch of primary helix - 10 turns/cm, pitch of secondary helix — 2 turns/cm, depth of corrugations - O.δ mm. The corrugation depth given provides the required degree of stiffness and resistance to buckling and collapse in a prosthesis of the minimum diameter. A known prosthesis of the same minimum diameter having a single set of corrugations
Figure imgf000004_0001
would have required corrugations of at least 1.2 mm depth with a pitch of about 7 turns/cm. t .
It has been found by practical experiment that a vascular prosthesis as described according to
5 the invention having two sets of contra-pitch corrugations of low amplitude presents much less impedence to blood flow through the tube and also a greater evenness in build up of fibrous tissue than a known vascular prosthesis of the same degree of
10 stiffness and resistance to buckling and collapse obtained from a single set of higher amplitude corrugations since the graft formed by a prosthesis of the invention provides a closer approach to a constant diameter blood vessel than do the previously known
15 grafts having a"single set of corrugations of high amplitude. Conversely a prosthesis according to the invention formed with corrugations of the same amplitude as a known vascular prosthesis has a greater degree of stiffness and resistance to buckling and
20 collapse .
y^ξ EJ '
' OMPI

Claims

1. A vascular prosthesis which comprises a tube (1) of textile material formed with corrugations in the form of a primary helix (2) is characterized in tha secondary corrugations in the form of a secondary helix (3) of a pitch opposite to and greater than the pitch of the primary helix (2) are superposed on the corrugations of the primary helix (2) .
2. A method of forming a prosthesis by winding a thread in one direction in the form of a helix (2) around a plain tube (1) of textile material which is subsequently compressed axially and heat set is characterized by additionally winding another thread around the tube in the opposite direction to form a secondary helix (3) having a pitch greater than the pitch of the first helix before axial pressure is applied to the tube.
SUBSTITUTE SHEET f OI.ΓPI
PCT/GB1983/000090 1982-03-25 1983-03-24 Vascular prosthesis WO1983003349A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE1983900955 DE104199T1 (en) 1982-03-25 1983-03-24 VESSEL PROSTHESIS.
DK531983A DK531983A (en) 1982-03-25 1983-11-21 CAR PROTECTION AND PROCEDURE FOR PREPARING A CAR PROTECTION

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8208866820325 1982-03-25
GB8208866 1982-03-25

Publications (1)

Publication Number Publication Date
WO1983003349A1 true WO1983003349A1 (en) 1983-10-13

Family

ID=10529291

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1983/000090 WO1983003349A1 (en) 1982-03-25 1983-03-24 Vascular prosthesis

Country Status (7)

Country Link
EP (1) EP0104199A1 (en)
JP (1) JPS6038135B2 (en)
DK (1) DK531983A (en)
ES (2) ES520934A0 (en)
GR (1) GR77133B (en)
IT (1) IT8347996A0 (en)
WO (1) WO1983003349A1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5282847A (en) * 1991-02-28 1994-02-01 Medtronic, Inc. Prosthetic vascular grafts with a pleated structure
WO1996032077A1 (en) * 1995-04-11 1996-10-17 The University Of Queensland Artificial graft prosthesis
WO1996040001A1 (en) * 1995-06-07 1996-12-19 Baxter International Inc. Externally supported tape reinforced vascular graft
US5641373A (en) * 1995-04-17 1997-06-24 Baxter International Inc. Method of manufacturing a radially-enlargeable PTFE tape-reinforced vascular graft
WO2004021931A1 (en) * 2002-09-06 2004-03-18 Boston Scientific Limited ePTFE CRIMPED GRAFT
US6863686B2 (en) 1995-04-17 2005-03-08 Donald Shannon Radially expandable tape-reinforced vascular grafts
US6994724B2 (en) 2000-11-15 2006-02-07 Mcmurray Fabrics, Inc. Soft-tissue tubular prostheses with seamed transitions
US20130129909A1 (en) * 2004-03-25 2013-05-23 Vascular Flow Technologies Limited Tubular Conduit
US8579961B2 (en) 2002-07-26 2013-11-12 Lifeshield Sciences Llc Sectional crimped graft
US9649186B2 (en) 2009-11-17 2017-05-16 Vascular Flow Technologies Limited Tubular conduit
US9737421B2 (en) 1998-12-28 2017-08-22 Vascular Flow Technologies Limited Blood-flow tubing
US9763769B2 (en) 2005-09-06 2017-09-19 Vascular Flow Technologies Limited Tubular graft
US11969335B2 (en) 2021-04-27 2024-04-30 Cook Medical Technologies Llc Woven graft having a taper with a re-engaged warp end

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3637115A1 (en) * 1986-10-31 1988-05-05 Standard Elektrik Lorenz Ag POLED FLAT RELAY

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3029819A (en) * 1959-07-30 1962-04-17 J L Mcatee Artery graft and method of producing artery grafts
US3337673A (en) * 1958-07-31 1967-08-22 Us Catheter & Instr Corp Uniformly corrugated prosthesis and process of making same
GB1183497A (en) * 1966-10-19 1970-03-04 Ethicon Inc Surgical Prosthesis
CH486975A (en) * 1968-03-27 1970-03-15 Gubela Ag Process for the production of a pipe from thermoplastic synthetic material and pipe produced according to the process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337673A (en) * 1958-07-31 1967-08-22 Us Catheter & Instr Corp Uniformly corrugated prosthesis and process of making same
US3029819A (en) * 1959-07-30 1962-04-17 J L Mcatee Artery graft and method of producing artery grafts
GB1183497A (en) * 1966-10-19 1970-03-04 Ethicon Inc Surgical Prosthesis
CH486975A (en) * 1968-03-27 1970-03-15 Gubela Ag Process for the production of a pipe from thermoplastic synthetic material and pipe produced according to the process

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5607464A (en) * 1991-02-28 1997-03-04 Medtronic, Inc. Prosthetic vascular graft with a pleated structure
US5653745A (en) * 1991-02-28 1997-08-05 Medtronic, Inc. Prosthetic vascular graft with a pleated structure
US5282847A (en) * 1991-02-28 1994-02-01 Medtronic, Inc. Prosthetic vascular grafts with a pleated structure
WO1996032077A1 (en) * 1995-04-11 1996-10-17 The University Of Queensland Artificial graft prosthesis
US6863686B2 (en) 1995-04-17 2005-03-08 Donald Shannon Radially expandable tape-reinforced vascular grafts
US8062354B2 (en) 1995-04-17 2011-11-22 Edwards Lifesciences Corporation Radially-expandable PTFE tape-reinforced vascular grafts
US5641373A (en) * 1995-04-17 1997-06-24 Baxter International Inc. Method of manufacturing a radially-enlargeable PTFE tape-reinforced vascular graft
US5976192A (en) * 1995-06-07 1999-11-02 Baxter International Inc. Method of forming an externally supported tape reinforced vascular graft
WO1996040001A1 (en) * 1995-06-07 1996-12-19 Baxter International Inc. Externally supported tape reinforced vascular graft
US9737421B2 (en) 1998-12-28 2017-08-22 Vascular Flow Technologies Limited Blood-flow tubing
US10188532B2 (en) 1998-12-29 2019-01-29 Vascular Flow Technologies Limited Blood-flow tubing
US6994724B2 (en) 2000-11-15 2006-02-07 Mcmurray Fabrics, Inc. Soft-tissue tubular prostheses with seamed transitions
US8579961B2 (en) 2002-07-26 2013-11-12 Lifeshield Sciences Llc Sectional crimped graft
US7879085B2 (en) 2002-09-06 2011-02-01 Boston Scientific Scimed, Inc. ePTFE crimped graft
WO2004021931A1 (en) * 2002-09-06 2004-03-18 Boston Scientific Limited ePTFE CRIMPED GRAFT
US9456891B2 (en) * 2004-03-25 2016-10-04 Vascular Flow Technologies Limited Tubular conduit
US20130129909A1 (en) * 2004-03-25 2013-05-23 Vascular Flow Technologies Limited Tubular Conduit
US9763769B2 (en) 2005-09-06 2017-09-19 Vascular Flow Technologies Limited Tubular graft
US9649186B2 (en) 2009-11-17 2017-05-16 Vascular Flow Technologies Limited Tubular conduit
US11969335B2 (en) 2021-04-27 2024-04-30 Cook Medical Technologies Llc Woven graft having a taper with a re-engaged warp end

Also Published As

Publication number Publication date
DK531983D0 (en) 1983-11-21
EP0104199A1 (en) 1984-04-04
ES8403312A1 (en) 1984-03-16
ES520934A0 (en) 1984-03-16
DK531983A (en) 1983-11-21
ES284568U (en) 1985-09-16
IT8347996A0 (en) 1983-03-25
GR77133B (en) 1984-09-07
JPS59500502A (en) 1984-03-29
JPS6038135B2 (en) 1985-08-30
ES284568Y (en) 1986-05-01

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