WO1999030638A1 - Endoprothese coronaire - Google Patents
Endoprothese coronaire Download PDFInfo
- Publication number
- WO1999030638A1 WO1999030638A1 PCT/FR1998/002710 FR9802710W WO9930638A1 WO 1999030638 A1 WO1999030638 A1 WO 1999030638A1 FR 9802710 W FR9802710 W FR 9802710W WO 9930638 A1 WO9930638 A1 WO 9930638A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- membrane
- coronary
- molecular weight
- endoprosthesis according
- molecules
- 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.)
- Ceased
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
- A61F2/07—Stent-grafts
Definitions
- the present invention relates to a coronary stent for vascular support.
- FR2727854 describes a self-expanding endoprosthesis, intended for the maintenance of walls of anatomical canals.
- the object of the present invention is to avoid this drawback by proposing a stent preventing, or at least reducing, cell proliferation.
- the invention relates in its most general sense to a stent covered by a single-layer micro-porous membrane forming a screen.
- This membrane is a passive membrane, that is to say without action of release of drugs or active substances.
- This membrane is preferably unidirectional, that is to say that it allows certain molecules of a molecular weight less than the diameter of the holes in the membrane to pass in one direction only, from the vascular wall to the arterial lumen.
- the membrane is hydrophilic.
- the coronary endoprosthesis according to the invention is covered with a membrane allowing the passage of molecules with a molecular weight which can vary from 1000 to 60000 depending on the diameter of the pores of the membrane.
- the membrane has a thickness of between 0.1mm and 0.2mm.
- the membrane is a dialysis membrane.
- the membrane is treated by ion bombardment, in order to precisely adjust the diameter of these pores.
- the endoprosthesis is formed by an openwork metallic structure having meshes alternating with a network of wires or shoring walls.
- This metallic structure is generally expandable using a balloon.
- the outer surface of this metallic structure is covered by a porous membrane (dialysis) with a thickness of 0.1mm.
- This membrane is a biocompatible membrane made up of a sieve allowing the passage of molecules whose molecular weight can vary from
- This membrane can be formed by a dialysis membrane for hemodialysis usually having the form of flat sheets, sheathed or hollow fiber sheets of polysaccharide ether. This membrane is deposited on the expandable support structure.
- the membrane may also be a polysulfone membrane in the form of a hollow fiber comprising, on its inner surface, a layer of dense skin having no observable pores and on its outer surface micropores having an average pore diameter of 50 to 500 mm with a fractional surface porosity of 5 to 50%.
- a membrane capable of coating the support structure is a membrane in the form of a hollow fiber for the dialysis of blood, formed by spinning in the molten state of a block copolymer.
- Another membrane adapted to the invention is a synthetic membrane or one based on modified cellulose.
- These can be polyacrylonitrite type membranes, for example a copolymer of acrylonitrite, methacrylate, methylene and acrylic acid or a copolymer of acrylonitrile and a salt such as sodium methallyl sulfonate. It has a homogeneous symmetrical structure and a hydrophilic behavior. The average pore size is around 30 angstroms, the maximum opening is around 55 angstroms. It allows the diffusion of small molecules and the convective transfer of larger molecules.
- the membrane has a high hydraulic permeability and a high permeability to solutes in the molecular weight range between 1000 and 60,000 daltons.
- the sieving coefficient from 0 to a molecular weight of 35,000 daltons.
Landscapes
- Health & Medical Sciences (AREA)
- Gastroenterology & Hepatology (AREA)
- Pulmonology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU15680/99A AU1568099A (en) | 1997-12-12 | 1998-12-11 | Coronary prosthesis |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9715801A FR2772258A1 (fr) | 1997-12-12 | 1997-12-12 | Endoprothese coronaire |
| FR97/15801 | 1997-12-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999030638A1 true WO1999030638A1 (fr) | 1999-06-24 |
Family
ID=9514558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1998/002710 Ceased WO1999030638A1 (fr) | 1997-12-12 | 1998-12-11 | Endoprothese coronaire |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU1568099A (fr) |
| FR (1) | FR2772258A1 (fr) |
| WO (1) | WO1999030638A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6428569B1 (en) | 1999-11-09 | 2002-08-06 | Scimed Life Systems Inc. | Micro structure stent configurations |
| US7060089B2 (en) | 2002-01-23 | 2006-06-13 | Boston Scientific Scimed, Inc. | Multi-layer stent |
| US7226475B2 (en) | 1999-11-09 | 2007-06-05 | Boston Scientific Scimed, Inc. | Stent with variable properties |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4374669A (en) * | 1975-05-09 | 1983-02-22 | Mac Gregor David C | Cardiovascular prosthetic devices and implants with porous systems |
| US5069945A (en) * | 1986-10-20 | 1991-12-03 | Memtec America Corporation | Ultrapous thin-film membranes |
| US5383928A (en) * | 1992-06-10 | 1995-01-24 | Emory University | Stent sheath for local drug delivery |
| US5578075A (en) * | 1992-11-04 | 1996-11-26 | Michael Peck Dayton | Minimally invasive bioactivated endoprosthesis for vessel repair |
| US5639278A (en) * | 1993-10-21 | 1997-06-17 | Corvita Corporation | Expandable supportive bifurcated endoluminal grafts |
| US5653760A (en) * | 1993-08-30 | 1997-08-05 | Saffran; Bruce N. | Method and apparatus for managing macromolecular distribution |
| WO1997042911A1 (fr) * | 1996-05-15 | 1997-11-20 | Medtronic, Inc. | Extenseur intraluminal |
| EP0815806A2 (fr) * | 1996-06-27 | 1998-01-07 | Cordis Corporation | Implant endovasculaire à porosité contrÔlée |
-
1997
- 1997-12-12 FR FR9715801A patent/FR2772258A1/fr active Pending
-
1998
- 1998-12-11 AU AU15680/99A patent/AU1568099A/en not_active Abandoned
- 1998-12-11 WO PCT/FR1998/002710 patent/WO1999030638A1/fr not_active Ceased
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4374669A (en) * | 1975-05-09 | 1983-02-22 | Mac Gregor David C | Cardiovascular prosthetic devices and implants with porous systems |
| US5069945A (en) * | 1986-10-20 | 1991-12-03 | Memtec America Corporation | Ultrapous thin-film membranes |
| US5383928A (en) * | 1992-06-10 | 1995-01-24 | Emory University | Stent sheath for local drug delivery |
| US5578075A (en) * | 1992-11-04 | 1996-11-26 | Michael Peck Dayton | Minimally invasive bioactivated endoprosthesis for vessel repair |
| US5578075B1 (en) * | 1992-11-04 | 2000-02-08 | Daynke Res Inc | Minimally invasive bioactivated endoprosthesis for vessel repair |
| US5653760A (en) * | 1993-08-30 | 1997-08-05 | Saffran; Bruce N. | Method and apparatus for managing macromolecular distribution |
| US5639278A (en) * | 1993-10-21 | 1997-06-17 | Corvita Corporation | Expandable supportive bifurcated endoluminal grafts |
| WO1997042911A1 (fr) * | 1996-05-15 | 1997-11-20 | Medtronic, Inc. | Extenseur intraluminal |
| EP0815806A2 (fr) * | 1996-06-27 | 1998-01-07 | Cordis Corporation | Implant endovasculaire à porosité contrÔlée |
Non-Patent Citations (1)
| Title |
|---|
| "ADVERTISEMENT", NTIS TECH NOTES, 1 January 1991 (1991-01-01), pages 86, XP000383525 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6428569B1 (en) | 1999-11-09 | 2002-08-06 | Scimed Life Systems Inc. | Micro structure stent configurations |
| US7226475B2 (en) | 1999-11-09 | 2007-06-05 | Boston Scientific Scimed, Inc. | Stent with variable properties |
| US7879082B2 (en) | 1999-11-09 | 2011-02-01 | Boston Scientific Scimed, Inc. | Micro structure stent configurations |
| US7060089B2 (en) | 2002-01-23 | 2006-06-13 | Boston Scientific Scimed, Inc. | Multi-layer stent |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2772258A1 (fr) | 1999-06-18 |
| AU1568099A (en) | 1999-07-05 |
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