WO1983003349A1 - Vascular prosthesis - Google Patents
Vascular prosthesis Download PDFInfo
- 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
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
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Biomedical Technology (AREA)
- Pulmonology (AREA)
- Vascular Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Gastroenterology & Hepatology (AREA)
- Mechanical Engineering (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
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
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
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) | ES8403312A1 (en) |
GR (1) | GR77133B (en) |
IT (1) | IT8347996A0 (en) |
WO (1) | WO1983003349A1 (en) |
Cited By (13)
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) | 2020-04-28 | 2024-04-30 | Cook Medical Technologies Llc | Woven graft having a taper with a re-engaged warp end |
Families Citing this family (1)
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)
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 |
-
1983
- 1983-03-22 GR GR70855A patent/GR77133B/el unknown
- 1983-03-24 EP EP83900955A patent/EP0104199A1/en not_active Withdrawn
- 1983-03-24 ES ES520934A patent/ES8403312A1/en not_active Expired
- 1983-03-24 JP JP58501095A patent/JPS6038135B2/en not_active Expired
- 1983-03-24 WO PCT/GB1983/000090 patent/WO1983003349A1/en not_active Application Discontinuation
- 1983-03-25 IT IT8347996A patent/IT8347996A0/en unknown
- 1983-11-21 DK DK531983A patent/DK531983A/en not_active Application Discontinuation
- 1983-12-01 ES ES1983284568U patent/ES284568Y/en not_active Expired
Patent Citations (4)
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)
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) | 2020-04-28 | 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 |
---|---|
ES520934A0 (en) | 1984-03-16 |
GR77133B (en) | 1984-09-07 |
JPS59500502A (en) | 1984-03-29 |
ES284568U (en) | 1985-09-16 |
JPS6038135B2 (en) | 1985-08-30 |
DK531983D0 (en) | 1983-11-21 |
EP0104199A1 (en) | 1984-04-04 |
IT8347996A0 (en) | 1983-03-25 |
ES8403312A1 (en) | 1984-03-16 |
DK531983A (en) | 1983-11-21 |
ES284568Y (en) | 1986-05-01 |
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