WO2003090645A1 - Procede de realisation d'une prothese de valve cardiaque aortique ou mitrale et prothese de valve cardiaque aortique ou mitrale ainsi obtenue - Google Patents
Procede de realisation d'une prothese de valve cardiaque aortique ou mitrale et prothese de valve cardiaque aortique ou mitrale ainsi obtenue Download PDFInfo
- Publication number
- WO2003090645A1 WO2003090645A1 PCT/FR2003/001271 FR0301271W WO03090645A1 WO 2003090645 A1 WO2003090645 A1 WO 2003090645A1 FR 0301271 W FR0301271 W FR 0301271W WO 03090645 A1 WO03090645 A1 WO 03090645A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lips
- membrane
- textile
- prosthesis
- shaping
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
-
- 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
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
- A61F2/2415—Manufacturing methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/26—Mixtures of macromolecular compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/507—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials for artificial blood vessels
-
- 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
- A61F2/24—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body
- A61F2/2412—Heart valves ; Vascular valves, e.g. venous valves; Heart implants, e.g. passive devices for improving the function of the native valve or the heart muscle; Transmyocardial revascularisation [TMR] devices; Valves implantable in the body with soft flexible valve members, e.g. tissue valves shaped like natural valves
- A61F2/2418—Scaffolds therefor, e.g. support stents
Definitions
- the present invention relates to the field of medicine, in particular to reconstructive surgery, and in particular to cardiac surgery, more particularly to cardiac prostheses, and relates to a process for producing an aortic or mitral heart valve prosthesis.
- the invention also relates to an aortic or mitral heart valve prosthesis obtained by implementing this method.
- aortic heart valve prostheses is generally necessary to compensate for insufficiencies due to the degeneration of said valve, this more particularly for reasons of calcification due to an abnormal impregnation of the tissues by calcium salts following a degeneration of the fibers. collagen.
- These lips forming the valve are in fact subjected to a continuous movement of opening and closing of the aorta at a speed corresponding to the rhythm of the cardiac pulsation, so that any stiffening of the tissue constituting them irreparably leads to wear accelerated by fatigue.
- This wear of the heart valve will have two types of consequences, namely a valve symphysis creating an aortic narrowing responsible for an obstacle to the ejection of the left ventricle and destruction of the valves creating a diastolic reflux towards the left ventricle. Both of these effects lead to heart failure.
- mechanical prosthetic valves To repair shortcomings due to damage to the heart valve, the first methods used to build mechanical prosthetic valves consisted of making them in the form of a ball of biocompatible material housed in a retaining cage simultaneously forming a tight seat on the side facing the heart muscle, these valves being mounted at the outlet of the heart muscle, in the end of the artery comprising the reflux sinuses of the blood flow when the valve is closed.
- mechanical valves are constructed with one or more valves mounted on eccentric axes secured to a seat for attachment to the heart muscle.
- bioprostheses that is to say prostheses made from human organic tissue (homografts) or even porcine prostheses, that is to say porcine heart valves .
- the biological sheets of such prostheses are generally very well supported in grafting. However, by the very fact of their constitution by organic tissues, they are subject to aging and natural degeneration. These biological sheets are mounted on a seat which generates a hemodynamic brake on ejection.
- valve prostheses in synthetic material, in particular in polyurethane or formed silicone.
- these valves present fatigue resistance problems with risks of rupture at the bending zones.
- the present invention aims to overcome these drawbacks by proposing a method for producing an aortic or mitral heart valve prosthesis and a heart valve prosthesis thus obtained, making it possible to obtain a perfectly biocompatible prosthesis with excellent hold. to aging.
- the process for producing an aortic or mitral heart valve prosthesis is characterized in that it essentially consists in producing said prosthesis by shaping a textile material.
- the subject of the invention is also a prosthesis for an aortic or mitral heart valve, obtained by implementing this method, characterized in that it is essentially constituted by a textile material.
- Figure 1 is a perspective view of the prosthesis according to the invention
- Figure 2 is a perspective view of the stamping support of the prosthesis according to Figure 1
- Figure 3 is a side elevational view, on a larger scale, explaining the drawing operation
- Figure 4 is a plan view corresponding to Figure 3 and schematically showing the three lips of the prosthesis and the directions d stamping.
- FIG. 1 of the appended drawings represents a heart valve prosthesis 1 essentially constituted by three lips 2.
- This aortic or mitral heart valve prosthesis is advantageously produced, in accordance with the invention, according to a process which essentially consists in producing said prosthesis by shaping a textile material.
- the lips 2 of the heart valve prosthesis 1 are advantageously made by shaping a textile membrane.
- This textile membrane is a membrane of the type chosen from the group formed by the following assembly methods: fabric, nonwoven in the form of assembled fibers, nonwoven obtained by autofibrillation of a membrane by stretching and knitting.
- the shaping is carried out according to an operation chosen from the following group: concentric stamping, three-dimensional weaving, flat stamping, cutting by trimming and fixing and, optionally, thermofixation, prior mechanical deformation and application, at the level of the deformations, d '' a heat transfer fluid, application on a counter-form by a suction effect through said counter-form and heat-fixing by a supply of air or hot gas sucked through the textile membrane into the counter-form , heat transfer fluid pressing the textile membrane against a counterform.
- the shaping of the lips 2 can be carried out in a tubular element 1 into a textile membrane by a concentric drawing of three lips 2 of identical surfaces on a shaped part 3 reproducing the geometry of the lips 2 of a heart valve in the closed position of the artery, with prior cutting of said tubular element 1 on cylindrical segments 4 extending between the spokes of said lips 2.
- the tubular element 1 is held firmly above the segments 4 which are the subject of the preliminary cuts and can slide on the lower part of the shaped part 3 reproducing the geometry of the lips 2 to form said lips without deformation of plastic elongation of the fibers, but with deformation reduced membrane or mesh.
- the cut edges of the lips 2 are then provided with a means of protection and jointing between lips in the closed position of the valve.
- heat-fixing of said membrane thus deformed is then carried out, by passage through an oven at a temperature slightly above the glass transition temperature, then, after possible cooling, the valve prosthesis thus obtained is removed from the shaped part 3.
- the textile material used is advantageously constituted by polyester or polytetrafluoroethylene fibers taken alone or as a mixture or also by a self-fibrillated membrane by stretching polytetrafluoroethylene.
- each lip 2 extends over a circular segment having an opening angle of 120 ° on the perimeter, so that the free edge of each pocket delimited by each lip 2 will have a length, corresponding to twice the length of the radius of the lip, which will be slightly less than that defined by said opening angle on the perimeter, length which will correspond to twice the radius multiplied by ⁇ and divided by three.
- the edges of the lips tend, in cooperation with the circular segment delimiting each lip, to deform said pocket-shaped lips which fold up towards the sinus of the artery, which guarantees one of the conditions for closing the valve during the diastolic phase.
- the prior cutting of the tubular element 1 on cylindrical segments 4 extending between the radii of said lips 2 is preferably carried out, at the level of each lip 2, by means of a cutting device , not shown, with a blade or heater or other sectioning the tubular element of textile material 1 over the entire length of the segment with a positioning of said device slightly before the start of the simultaneous concentric drawing of the three lips 2 on the shaped part 3 .
- the firm holding of the tubular element 1 above the segments 4 during the preliminary cutting and the concentric drawing can be ensured, in known manner, by a simple flange not described in detail.
- This maintenance can make it possible, on the one hand, to create, in combination with the drawing support 3, cutting edges cooperating with the corresponding cutting device and, on the other hand, the blocking of the fabric on the entire perimeter of the upper part of said drawing support, so that during concentric stamping, the tubular element of textile material cannot move from top to bottom in the direction of the stamping punches, whereas the part of the tubular element made of textile material extending over the lower part of the stamping support 3 reproducing the geometry of the lips 2 can slide on this said lower part.
- FIG. 3 of the accompanying drawings This notion of holding the textile material on the upper part and the possibility of sliding on the lower part is shown more particularly in FIG. 3 of the accompanying drawings.
- the deformation of the textile material at the level of the stampings is carried out in a perfectly balanced manner over all of the stamped zones, the filling of the cavities of the lower part of the stamping support 3 being effected essentially by sliding.
- the stamping support structure 3 is preferably constituted by a cylindrical lower part comprising a central part molded with shapes corresponding to the shape of the lips 2 to be obtained and by a cylindrical upper part connected to the lower part by means of three retaining rods extending between them at 120 ° intervals and located at the junction of the spokes constituting said lips 2 with the corresponding angular segment, said upper part having, in the direction of the lower part, a perfectly flat surface and an advantageously cutting outer edge.
- the height of the rods will depend on the geometry of the pocket, formed in each lip 2, to be obtained and, in any case, must allow an optimal distribution of the deformations.
- the tubular element of textile material does not undergo cutting, so that the stamped part obtained has a lower part provided with the lips 2 and extended downwards by a cylindrical skirt , said cylindrical skirt with the lips 2 being connected by relatively small width wall elements to an upper cylindrical ring, the height of which can correspond to the height of the clamping flange of the annular element on the drawing support 3
- the width of these wall elements will be substantially equal to the diameter or the width of the retaining rods connecting the upper and lower parts of the drawing support 3.
- both the upper cylindrical ring and the lower cylindrical skirt can be adapted, as required, by cutting a strip of more or less significant textile material.
- the tubular element of textile material is blocked punctually, at three regular intervals of 120 ° on the lower part of the drawing support 3, by means of blocking means 5, such as retaining points (figure 3), these locking means 5 extending in the extension of the retaining rods connecting the upper and lower parts of said drawing support 3.
- blocking means 5 such as retaining points (figure 3)
- these locking means 5 make it possible to ensure during the operation of stamping and partial displacement of the textile material on the lower part of the stamping support 3, maintenance without wrinkling of the annular tube of textile material and more particularly to avoid wrinkling of this tube at the level of the wall elements connecting the upper tubular ring to the lower tubular skirt constituting the valve prosthesis.
- deformation by creasing of the lower tubular skirt is also avoided.
- the valve prosthesis obtained has both an exterior surface and a perfectly continuous interior surface.
- the fibrous structure constituting the tubular element of textile material can be formed, either in the form of a longitudinal strip closed on itself along a longitudinal generatrix by sewing, or under shape of a continuous, seamless tube.
- this fibrous structure can be provided with a coating of material or with material inserts improving its surface state or promoting rehabitation and / or having particular physiological properties.
- the fibrous structure may be provided, in particular, with a coating or inserts of drug substance with very slow dissolution, for example to avoid the formation of clots or else a colony of endothelial cells.
- the textile material constituting the valve prosthesis according to the invention is advantageously a microporous membrane allowing a weak exchange of fluids between the two faces of the lips 2.
- the establishment on the cut edges of the lips 2 of a means of protection and jointing between the lips in the closed position of the valve advantageously consists essentially of a treatment of the cut parts of each lip 2, namely joining radii to the corresponding circular segment, by depositing a material for covering the cut edges, in the form of a bead or the like.
- a material for covering the cut edges in the form of a bead or the like.
- an aortic or mitral heart valve prosthesis essentially by performing the setting formed by a three-dimensional weaving of three lips of identical surfaces reproducing the geometry of the lips of a heart valve in the closed position of the artery, this weaving being carried out with son of fibers of biocompatible synthetic textile material.
- this weaving being carried out with son of fibers of biocompatible synthetic textile material.
- an aortic or mitral heart valve prosthesis by shaping the lips 2 by stamping a textile membrane arranged at flat on a corresponding mold, then by cutting by trimming said lips and fixing and possibly thermofixing the membrane.
- the shaping of the lips 2 can also be carried out by slight prior mechanical deformation of the edge region of a textile membrane in the direction of a counter -form corresponding, then by application, at the deformations, of a heat transfer fluid.
- the heat transfer fluid used can be a gaseous fluid, steam, or a liquid fluid.
- the production of the lips 2 directly in the edge region makes it possible to confuse the edge of the lips 2 to be obtained with the edge of the textile membrane.
- no part of the membrane needs to be separated from the textile membrane at the level of the deformations of the lips 2, so that any risk of degradation of the membrane at this level, following cutting, is avoided.
- the valve obtained is particularly stable dimensionally and mechanically.
- the upper fixing ring can be omitted, so that the valve obtained has an even greater analogy with a natural valve.
- this mechanical deformation can be carried out by means of a punch moving the parts of the membranes in the direction of the corresponding recesses of the counterform, the final deformation and the thermofixation then being carried out by circulation of a heat-transfer fluid, after removal of the punches or the like.
- the free edge of this zone advantageously comprises a woven or knitted edge avoiding fraying of said edge.
- Such an embodiment is particularly important, because it makes it possible to eliminate any subsequent or previous treatment of the edge, which could result in a change in the mechanical characteristics of the membrane at the edge, or a change in the thickness of the membrane at this level.
- an aortic or mitral heart valve prosthesis which can very easily be implanted, by suturing or by means of expandable mechanical elements remaining permanently, or otherwise, and having a rigid structure.
- low bending favorable to the bending stress in fatigue and associated with a high tensile rigidity, favorable to the membrane stress.
- the structure of the textile membrane used makes it possible to respond optimally to the privileged stresses of the original valve, namely radial and circumferential, with a coupling between the two.
- the compliance of the textile valve therefore respects that of the actual valve.
- the various manufacturing methods make it possible to obtain a valve having a geometry identical to that of the human valve, therefore respecting hemodynamics.
- the almost equal length between the sum of the rays forming the two free edges of each lip 2 and the corresponding circular segment makes it possible to guarantee one of the conditions for closing the valve during the diastolic phase.
- the provision of the lower circular skirt, as well as, possibly, of the upper tubular ring makes it possible either to avoid the use of a frame, so that the flow is not disturbed by suturing.
- direct of the two cylindrical elements on the artery with an optimal orientation relative to the flow either to consider an implantation by use of a clamping and holding device in place by stent type expansion, or by means of an endoscopic suturing device, or even for implantation without disturbing the blood flow.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03740651.9A EP1499266B1 (fr) | 2002-04-23 | 2003-04-22 | Procede de realisation d une prothese de valve cardiaque aor tique ou mitrale et prothese de valve cardiaque aortique ou mitrale ainsi obtenue |
US10/512,567 US8043551B2 (en) | 2002-04-23 | 2003-04-22 | Method for producing an aortic or mitral heart valve prosthesis and resulting aortic or mitral heart valve |
JP2003587286A JP4467310B2 (ja) | 2002-04-23 | 2003-04-22 | 大動脈弁または僧帽弁の人工心臓弁を製造するための方法、およびその結果得られる大動脈弁または僧帽弁の人工心臓弁 |
AU2003262806A AU2003262806A1 (en) | 2002-04-23 | 2003-04-22 | Method for producing an aortic or mitral heart valve prosthesis and resulting aortic or mitral heart valve |
CA2483921A CA2483921C (fr) | 2002-04-23 | 2003-04-22 | Procede de realisation d'une prothese de valve cardiaque aortique ou mitrale et prothese de valve cardiaque aortique ou mitrale ainsi obtenue |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/05086 | 2002-04-23 | ||
FR0205086A FR2838630A1 (fr) | 2002-04-23 | 2002-04-23 | Procede de realisation d'une prothese de valve cardiaque aortique ou mitrale et prothese de valve cardiaque aortique ou mitrale ainsi obtenue |
FR02/12030 | 2002-09-27 | ||
FR0212030A FR2838631B1 (fr) | 2002-04-23 | 2002-09-27 | Procede de realisation d'une prothese de valve cardiaque aortique ou mitrale et prothese de valve cardiaque aortique ou mitrale ainsi obtenue |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003090645A1 true WO2003090645A1 (fr) | 2003-11-06 |
Family
ID=28793284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/001271 WO2003090645A1 (fr) | 2002-04-23 | 2003-04-22 | Procede de realisation d'une prothese de valve cardiaque aortique ou mitrale et prothese de valve cardiaque aortique ou mitrale ainsi obtenue |
Country Status (7)
Country | Link |
---|---|
US (1) | US8043551B2 (fr) |
EP (1) | EP1499266B1 (fr) |
JP (1) | JP4467310B2 (fr) |
AU (1) | AU2003262806A1 (fr) |
CA (1) | CA2483921C (fr) |
FR (1) | FR2838631B1 (fr) |
WO (1) | WO2003090645A1 (fr) |
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- 2002-09-27 FR FR0212030A patent/FR2838631B1/fr not_active Expired - Fee Related
-
2003
- 2003-04-22 US US10/512,567 patent/US8043551B2/en not_active Expired - Fee Related
- 2003-04-22 JP JP2003587286A patent/JP4467310B2/ja not_active Expired - Fee Related
- 2003-04-22 CA CA2483921A patent/CA2483921C/fr not_active Expired - Fee Related
- 2003-04-22 EP EP03740651.9A patent/EP1499266B1/fr not_active Expired - Lifetime
- 2003-04-22 WO PCT/FR2003/001271 patent/WO2003090645A1/fr active Application Filing
- 2003-04-22 AU AU2003262806A patent/AU2003262806A1/en not_active Abandoned
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US2832078A (en) * | 1956-10-17 | 1958-04-29 | Battelle Memorial Institute | Heart valve |
CH510433A (de) * | 1968-09-20 | 1971-07-31 | Howard Sparks Charles | Form zur Züchtung von in den Körper eines Lebewesens einpflanzbarem Gewebe |
EP0331345A2 (fr) * | 1988-03-02 | 1989-09-06 | Pfizer Hospital Products Group, Inc. | Etoffe tissée triaxialement pour valvules cardiaques |
US5500015A (en) * | 1991-05-16 | 1996-03-19 | Mures Cardiovascular Research, Inc. | Cardiac valve |
US5713953A (en) * | 1991-05-24 | 1998-02-03 | Sorin Biomedica Cardio S.P.A. | Cardiac valve prosthesis particularly for replacement of the aortic valve |
FR2728457A1 (fr) * | 1994-12-21 | 1996-06-28 | Franceschi Claude | Valve artificielle pour vaisseau sanguin |
WO2001052776A1 (fr) * | 2000-01-17 | 2001-07-26 | Heineman Medical Research, Inc. | Prothese d'anneau aortique munie de sinus de forme adaptable |
Also Published As
Publication number | Publication date |
---|---|
FR2838631B1 (fr) | 2004-12-24 |
FR2838631A1 (fr) | 2003-10-24 |
JP4467310B2 (ja) | 2010-05-26 |
EP1499266A1 (fr) | 2005-01-26 |
CA2483921C (fr) | 2011-10-25 |
AU2003262806A1 (en) | 2003-11-10 |
US20050177227A1 (en) | 2005-08-11 |
US8043551B2 (en) | 2011-10-25 |
CA2483921A1 (fr) | 2003-11-06 |
EP1499266B1 (fr) | 2014-02-19 |
JP2005527283A (ja) | 2005-09-15 |
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