EP0104199A1 - Vascular prosthesis - Google Patents
Vascular prosthesisInfo
- Publication number
- EP0104199A1 EP0104199A1 EP83900955A EP83900955A EP0104199A1 EP 0104199 A1 EP0104199 A1 EP 0104199A1 EP 83900955 A EP83900955 A EP 83900955A EP 83900955 A EP83900955 A EP 83900955A EP 0104199 A1 EP0104199 A1 EP 0104199A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- helix
- corrugations
- tube
- pitch
- primary
- 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.)
- Withdrawn
Links
- 230000002792 vascular Effects 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004753 textile Substances 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 210000004204 blood vessel Anatomy 0.000 abstract description 3
- KKEBXNMGHUCPEZ-UHFFFAOYSA-N 4-phenyl-1-(2-sulfanylethyl)imidazolidin-2-one Chemical compound N1C(=O)N(CCS)CC1C1=CC=CC=C1 KKEBXNMGHUCPEZ-UHFFFAOYSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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
- the tube of textile material may be formed by warp knitting, by weaving or by braiding and is preferably seamless.
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
Une prothèse vasculaire pour remplacer une section d'un vaisseau sanguin dans un corps humain ou animal comprend un tube (1) en matière textile formé avec des ondulations ayant la forme d'une hélice primaire (2), et des ondulations secondaires ayant la forme d'une hélice secondaire (3) et un pas opposé et supérieur au pas de l'hélice primaire, superposé sur les ondulations de l'hélice primaire.A vascular prosthesis for replacing a section of a blood vessel in a human or animal body comprises a tube (1) of textile material formed with undulations having the shape of a primary helix (2), and secondary undulations having the shape of a secondary propeller (3) and a pitch opposite and greater than the pitch of the primary propeller, superimposed on the undulations of the primary propeller.
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
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8208866 | 1982-03-25 | ||
| GB8208866 | 1982-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0104199A1 true EP0104199A1 (en) | 1984-04-04 |
Family
ID=10529291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83900955A Withdrawn EP0104199A1 (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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0272409A1 (en) * | 1986-10-31 | 1988-06-29 | Alcatel SEL Aktiengesellschaft | Polarized flat-type relay |
Families Citing this family (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 |
| AUPN228395A0 (en) * | 1995-04-11 | 1995-05-04 | Hart, Vincent G. | Artificial arterial-venous graft |
| US6863686B2 (en) | 1995-04-17 | 2005-03-08 | Donald Shannon | Radially expandable 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 |
| ES2206581T3 (en) * | 1995-06-07 | 2004-05-16 | Edwards Lifesciences Corporation | VASCULAR GRAFT WITH REINFORCEMENT TAPE AND EXTERNAL SUPPORT. |
| GB9828696D0 (en) | 1998-12-29 | 1999-02-17 | Houston J G | Blood-flow tubing |
| CA2429070C (en) | 2000-11-15 | 2007-08-14 | Mcmurray Fabrics, Inc. | Soft-tissue tubular prostheses with seamed transitions |
| US20040019375A1 (en) | 2002-07-26 | 2004-01-29 | Scimed Life Systems, Inc. | Sectional crimped graft |
| US7879085B2 (en) * | 2002-09-06 | 2011-02-01 | Boston Scientific Scimed, Inc. | ePTFE crimped graft |
| GB0406719D0 (en) * | 2004-03-25 | 2004-04-28 | Tayside Flow Technologies Ltd | A tubular conduit |
| GB2429650A (en) | 2005-09-06 | 2007-03-07 | Tayside Flow Technologies Ltd | A tubular graft |
| GB2475338A (en) | 2009-11-17 | 2011-05-18 | Tayside Flow Technologies Ltd | A tubular conduit with an internal and external helical formation |
| US11969335B2 (en) | 2020-04-28 | 2024-04-30 | Cook Medical Technologies Llc | Woven graft having a taper with a re-engaged warp end |
Family Cites Families (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 |
| US3479670A (en) * | 1966-10-19 | 1969-11-25 | Ethicon Inc | Tubular prosthetic implant having helical thermoplastic wrapping therearound |
| DE1988184U (en) * | 1968-03-27 | 1968-06-20 | Guenther Gubela | IRRIGATION AND DRAINAGE PIPE MADE OF THERMOPLASTIC PLASTIC. |
-
1983
- 1983-03-22 GR GR70855A patent/GR77133B/el unknown
- 1983-03-24 ES ES520934A patent/ES520934A0/en active Granted
- 1983-03-24 WO PCT/GB1983/000090 patent/WO1983003349A1/en not_active Application Discontinuation
- 1983-03-24 EP EP83900955A patent/EP0104199A1/en not_active Withdrawn
- 1983-03-24 JP JP58501095A patent/JPS6038135B2/en not_active Expired
- 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
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8303349A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0272409A1 (en) * | 1986-10-31 | 1988-06-29 | Alcatel SEL Aktiengesellschaft | Polarized flat-type relay |
Also Published As
| Publication number | Publication date |
|---|---|
| ES284568U (en) | 1985-09-16 |
| JPS59500502A (en) | 1984-03-29 |
| ES8403312A1 (en) | 1984-03-16 |
| JPS6038135B2 (en) | 1985-08-30 |
| DK531983D0 (en) | 1983-11-21 |
| GR77133B (en) | 1984-09-07 |
| WO1983003349A1 (en) | 1983-10-13 |
| IT8347996A0 (en) | 1983-03-25 |
| DK531983A (en) | 1983-11-21 |
| ES284568Y (en) | 1986-05-01 |
| ES520934A0 (en) | 1984-03-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19831220 |
|
| AK | Designated contracting states |
Designated state(s): AT BE CH DE FR GB LI LU NL SE |
|
| TCNL | Nl: translation of patent claims filed | ||
| EL | Fr: translation of claims filed | ||
| TCAT | At: translation of patent claims filed | ||
| DET | De: translation of patent claims | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19850607 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HOOD, ROBERT GORDON |