DE2700531C2 - Rahmengerüst für eine Herzklappe - Google Patents
Rahmengerüst für eine HerzklappeInfo
- Publication number
- DE2700531C2 DE2700531C2 DE2700531A DE2700531A DE2700531C2 DE 2700531 C2 DE2700531 C2 DE 2700531C2 DE 2700531 A DE2700531 A DE 2700531A DE 2700531 A DE2700531 A DE 2700531A DE 2700531 C2 DE2700531 C2 DE 2700531C2
- Authority
- DE
- Germany
- Prior art keywords
- approaches
- sections
- framework
- ring
- heart valve
- 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.)
- Expired
Links
- 210000003709 heart valve Anatomy 0.000 title claims description 16
- 238000013459 approach Methods 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 229910000639 Spring steel Inorganic materials 0.000 claims 2
- 230000004323 axial length Effects 0.000 claims 1
- 239000007943 implant Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 2
- 210000001765 aortic valve Anatomy 0.000 description 2
- 229910000701 elgiloys (Co-Cr-Ni Alloy) Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 101150055869 25 gene Proteins 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000000560 biocompatible material Substances 0.000 description 1
- 238000013130 cardiovascular surgery Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 210000004115 mitral valve Anatomy 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 210000000591 tricuspid valve Anatomy 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
- A61F2/24—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
-
- 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
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0075—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S623/00—Prosthesis, i.e. artificial body members, parts thereof, or aids and accessories therefor
- Y10S623/90—Stent for heart valve
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (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)
Description
45
40
Die Erfindung betrifft ein Rahmengerüst für eine Herzklappe nach dem Oberbegriff des Patentanspruches
1, wie es aus S. Sugie et al., »The Journal of Thoracic
and Cardiovascular Surgery«, Bd. 57, S. 455—463
(1969), bekannt ist
Grundsätzlich sind mit einem Rahmengerüst bzw. einem Stützrahmen versehene bioprosthetische Herzklappen
bekannt, weiche klappenförmige Implantate halten, die entweder xenogene (heterogene) oder allotrope
(homologe) Implantate sein können.
Derartige Implantate sind im allgemeinen auf entsprechenden Rahmengerüsten angebracht, bei welchen
durch einen entsprechenden Ring eine starre öffnung, wie beispielsweise aus der FR-PS 203 88 43 bekannt ist,
festgelegt wird.
Bei dem bekannten gattungsgemäßen Rahmengerüst (S. Sugie et al.) sind die Ansätze haarnadelartig gestaltet,
wobei die Schenkel der Ansätze praktisch direkt aneinanderliegend
verlaufen, so daß sie nicht nach innen gebogen weiden können, um eine Änderung des Offnungsdurchmessers
des Rahmengerüstes zu ermöglichen. Neben dieser konfigurationsbedingten Steifigkeit
trägt auch das Material Titan, das zur Herstellung verwendet wird, dazu bei, eine Änderung und Anpassung
des Öffnungsdurchmessers des Rahmengerüstes zu unterbinden.
Der Erfindung liegt daher die Aufgabe zugrunde, ein in radialer Richtung elastisches Rahmengerüst zu schafdas
Rahmengerüst äußerst einfach und zuverlässig herzustellen.
Die Erfindung wird nachfolgend beispielsweise anhand der Zeichnung beschrieben; in dieser z'jigt
F i g. 1 eine perspektivische DarcsrHung einer bioprosthetischen
Herzklappe;
F i g. 2 eine perspektivische Darstellung, welche das aus Draht bestehende Rahmengerüst für eine Herzklappe
veranschaulicht;
In der F i g. 1 ist mit dem Bezugszeichen 10 eine bioprosthetische
Herzklappe in ihrer Gesamtheit bezeichnet weiche zur Implantation in einer Aortenposition
ausgebildet ist Ob diese Herzklappe 10 dazu dient eine natürliche Aortenklappe oder eine Mitralklappe oder
aber eine Trikuspidalklappe zu ersetzen, hängt in weitem
Umfang von der Größe der Herzklappe und von der Konstruktion ihrer Nahtmanschette oder Verbindungsmanschette
oder des entsprechenden Rahmengerüstes ab. Erfindungsbezogen haben alle drei Typen von
Klappen im wesentlichen dieselben Merkmale, und es ist in der vorliegenden Beschreibung deshalb eine Aortenklappe
zur Veranschaulichung als Beispiel gewählt
Die Herzklappe 10 weist ein Rahmengerüst 11 und ein klappenförmiges Implantat 12 auf. Als Implantat 12
eignet sich ein entsprechend präpariertes xenogenes Schweineimplantat.
Das Implantat 12 hat drei Ansätze 13,14,15, welche
entlang den Verbindungslinien 15 aneinandergrenzen.
Das Rahmengerüst 11 besteht im wesentlichen aus einem flexiblen Ringrahmen 16, welcher entsprechend
geformt, gepolstert und mit einem biokompatiblen Ma-
60
27 OO 531
3 4
terial derart abgedeckt wird, daß die fertiggestellte mens vermindert Somit ist der Ringrahmen 16 in der
Herzklappe innerhalb eines menschlichen Herzens posi- Lage, eine begrenzte Kontraktion sowie eine Expansion
tioniert werden kann und das Einwachsen von Gewebe auszuführen, wenn die U-Schenket 20 der Ansätze 17 bis
in das Material ermöglicht, mit welchem der Rahmen 19 und innen und nach außen gebogen werden,
abgedeckt ist Der Ringrahmen 16 weist eine ringförmi- 5 Außerdem sind die Verbindungsabschnitte 21 selbst
ge Konfiguration auf und besteht im wesentlichen aus in der Lage, eine begrenzte Biegung auszuführen. Insbeeinem
einzigen Stück Federdraht, welcher derart ge- sondere kann die Krümmung jedes bogenförmigen Verformt
ist, daß eine Triade oder ein mit drei Ansätzen 17, bindungsabschnhtes 21 etwas zunehmen oder abneh-18,19
versehenes Gebilde entsteht, wobei die Ansätze men. Eine derartige Biegung ermöglicht eine leichte,
17,18,19 über dem Umfang eip.es Ringes auf bsabstan- io jedoch bedeutsame Veränderung in den Positionen der
det voneinander angeordnet sind und sich in axialer Ansätze 17 bis 19 relativ zueinander und in bezug auf
Richtung erstrecken. - die Achse der Herzklappe 10, wie es durch die unterbro-
Fig.2 zeigt die U-förmig ausgebildeten Ansätze 17 chenen Linien in der Fig.3 veranschaulicht ist Die
bis 19. Gemäß F i g. 2 weist jeder Ansatz 17 bis 19 auge- Konfiguration der Öffnung des Ringrahmens kann damein
eine U-förmige Konfiguration auf, wobei die is her durch Kräfte verändert werden, die während jedes
Schenkel 20 an ihren unteren Enden, die auf Abstand Schlagen eines Herzens auftreten, in dem eine derartige
voneinander angeordnet sind, giatt in bogenförmige bioprosthetische Herzklappe 10 implantiert ist Das
Verbindungsabschnitte 21 übergehen. Die bogenförmi- Rahmengerüst kann daher in bestimmten Umfang degen
Verbindungsabschnitte 21 erstrecken sich in Um- formiert werden und hat die Fähigkeit, während des
fangsrichtung und sind jeweils mit benachbarten Sehen- 20 Herzschlages sich La geringem jedoch definiertem Umkeln
20 der Ansätze 17,18,19 verbunden. fang auszudehnen und zusammenzuziehen. Diese Fa-
Der Federdraht, aus welchem der Ringrahraen 16 ge- higkeit ist nicht nur dazu vorteilhak, eine verbesserte
formt ist, hat seine Endabschnitte 22 entlang φη bogen- Lebensdauer oder eine besonders Jangzvitige zuverläsförmigen
Verbindungsabschnitten 21 mit Hilfe einer sige Arbeitsweise eines xenogenen oder eine homoloentsprechenden
Hülse 23 verbunden. Sowohl die Lage 25 gen Implantates zu gewährleisten, sondern es besteht
als auch die Art der Verbindung sind von Bedeutung, darüber hinaus durch diese Eigenschaft auch die Mögwenn
eine besonders lange Lebensdauer des Rahmen- lichkeit, daß die Ansätze mit einem Gleitverschluß an
gerüstes gewährleistet sein solL Es hat sich gezeigt daß ihren freien Rändern geschlossen werden können, und
die mittlere Zone eines bogenförmigen Verbindungsab- zwar in einer Weise, die der physiologischen Arbeitsschnittes 21 ein Bereich ist, in welchem verhältnismäßig 30 weise sehr nahekommt
geringe Spannungen auftreten, und die Verwendung ei-
ner Hülse 23, welche durch Krimpen mit den Enden des Hierzu 2 Blatt Zeichnungen
bei der praktisch keine Materialprobleme auftreten, die
dicht ist und bei welcher auch keine Errnüdungsbrüche 35
zu befürchten sind, wie sie bei einer Schweißverbindung
erstaunlich rasch vorkommen können.
dicht ist und bei welcher auch keine Errnüdungsbrüche 35
zu befürchten sind, wie sie bei einer Schweißverbindung
erstaunlich rasch vorkommen können.
. Der Federdraht weist geeigneterweise einen kreisförmigen Querschnitt auf und hat mit Ausnahme des Bereiches
der Hülse 23 über seine gesamte Längsausdehnung 40
einen im wesentlichen gleichförmigen Durchmesser. Jeder U-förmige Ansatz 17, 18,19 hat eine abgerundete
oder glatt gekrümmte Oberseite. Ir. ähnlicher Weise
sind die unteren Enden der U-Schenkel derart nach außen gebogen, daß ein glatter Obergang zu den Verbin- 45
dungsabschnitten 21 erfolgt
einen im wesentlichen gleichförmigen Durchmesser. Jeder U-förmige Ansatz 17, 18,19 hat eine abgerundete
oder glatt gekrümmte Oberseite. Ir. ähnlicher Weise
sind die unteren Enden der U-Schenkel derart nach außen gebogen, daß ein glatter Obergang zu den Verbin- 45
dungsabschnitten 21 erfolgt
Das Rahmengerüst 11 besteht zfeckmäßigerweise
aus einem Federdrahtmaterial, welches nicht korrodiert,
eine hohe Ermüdungsfestigkeit aufweist und biokompatibel ist Ein besonders geeignetes Material hierfür ist so
ein Stahl. Speziell hat sich ein Stahl der Firma Elgiloy,
Elgin, Illinois, USA, mit der Bezeichnung »Elgiloy« bewährt Es können jedoch auch andere geeignete rostfreie Stähle oder Legierungen verwendet werden, sofern sie die oben genannten Eigenschaften aufweisen. 55
aus einem Federdrahtmaterial, welches nicht korrodiert,
eine hohe Ermüdungsfestigkeit aufweist und biokompatibel ist Ein besonders geeignetes Material hierfür ist so
ein Stahl. Speziell hat sich ein Stahl der Firma Elgiloy,
Elgin, Illinois, USA, mit der Bezeichnung »Elgiloy« bewährt Es können jedoch auch andere geeignete rostfreie Stähle oder Legierungen verwendet werden, sofern sie die oben genannten Eigenschaften aufweisen. 55
Es ist ersichtlich, daß die bogenförmigen Verbindungsabschnitte 21 in der Anordnung den Umriß des
Öffnungsringes der Herzklappe 10 festlegen. Da die
Verbindungsabschnitte 21 durch die als Saumhalter dienenden Ansätze 17,18,19 unterbrochen sind und da die 60
unteren Enden jedes Paares von U-Schenkeln 20 im
Abstand zueinander angeordnet sind, wobei die U-Schenkel 20 nach innen zur Mitte der Herzklappe 10
gebogen sein können, wie es aus der F i g. 4 ersichtlich
ist wird der Abstand zwischen benachbarten, segment- 65
artigen Verbindungsabschnitten 21, bezogen auf die U-Form der Ansätze 17 bis 19, verringert. Es wird dadurch
der effektive Umfang Lzw. Durchmesser des Ringrah-
Öffnungsringes der Herzklappe 10 festlegen. Da die
Verbindungsabschnitte 21 durch die als Saumhalter dienenden Ansätze 17,18,19 unterbrochen sind und da die 60
unteren Enden jedes Paares von U-Schenkeln 20 im
Abstand zueinander angeordnet sind, wobei die U-Schenkel 20 nach innen zur Mitte der Herzklappe 10
gebogen sein können, wie es aus der F i g. 4 ersichtlich
ist wird der Abstand zwischen benachbarten, segment- 65
artigen Verbindungsabschnitten 21, bezogen auf die U-Form der Ansätze 17 bis 19, verringert. Es wird dadurch
der effektive Umfang Lzw. Durchmesser des Ringrah-
Claims (4)
1. Rahmengerüst für eine Herzklappe mit einem entlang dem Umfang einer Ringkonfiguration ange- s
ordneten Ringrahme.i (16), von dem in bezug auf die Ringkonfiguration nach der einen Seite in axialer
Richtung Ansätze (17,18,19) abstehen, die in Ringrahmenabschnitte
übergehen, die als gewölbte Verbindungsabschnitte (21) zwischen benachbarten An- to
Sätzen (17,18,19) ausgebildet sind, dadurch gekennzeichnet,
daß die Ansätze (17,18,19) jeweils U-förmig ausgebildet sind, daß die U-Schenkel
gerundet in die Ringrahmenabschnitte übergehen, daß zwischen den U-Schenkeln eines Ansatzes (17,
!8,19) jeweils ein Freiraum gebildet ist und daß die Ansätze (17,18,19) und die Verbindungsabschnitte
(21) aus einem Federstahldraht bestehen, dessen Endabschnitte (22) in der Mitte eines der gewölbten
Verbindungsabschnitte (21) mittels einer rohrförmigen Hülse £3) miteinander verbunden sind, weiche
sich über die Endabschnitte (22) erstreckt
2. Rahmengerüst nach Anspruch 1, dadurch gekennzeichnet,
daß die Hülse (23) an den beiden Endabschnitten (22) durch eine Krimpverbindung befe- 2s
stigtist
3. Rahmengerüst nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß jeder gewölbte Verbindungsabschnitt (21) sich mit einem Hauptteil seiner Länge
entlang einer Ebene senkrecht zur Achse des Rahmengerüsts (11) erstreckt
4. Rahmei^crüst nach Anspruch 3, dadurch gekennzeichnet,
daß jeder der Ansätze (17,18,19) des
Ringrahmens (16) an seinem oberen Ende abgerun-
Diese Aufgabe wird bei einem Rahmengerüst nach dem Oberbegriff des Patentanspruches 1 durch die in
dessen kennzeichnendem Teil enthaltenen Merkmale gelöst
Besondere Ausführungsarten der Erfindung ergeben sich aus den Patentansprüchen 2—4.
Durch die Erfindung wird somit ein flexibles bzw. verhältnismäßig leicht biegbares und einfach herstellbares
Rahmengenist geschaffen, welches während des Herzschlages seine Abmessungen und seine Konfiguration
in bestimmten Umfang ändern kann. Gemäß der Erfindung ist der wesentliche Vorteil erreichbar, daß das
Rahmengerüst in Reaktion auf Kräfte in einem bestimmten Umfang nachgeben kann, wenn derartige
Kräfte die Tendenz haben, die Konfiguration und speziell den Umfang des Öffnungsringes in radialer Richtung
zu verändern. Eine derartige Flexibilität und leichte Verformbarkeit ermöglicht es, daß die blattartigen
Ansätze an ihren freien Rändern mit einem gleitbaren Verschlußelement eine entsprechend gute Abdichtung
bewirken können, und zwar in ähnlicher Weise, wie es
physiologisch geschieht Dadurch wird nicht nur die Arbeitsweise verbessert, sondern es werden insbesondere
auch die Zuverlässigkeit und die Lebensdauer wesentlich erhöht
Besonders vorteilhaft ist die Biegemöglichkeit der U-Schenkel der Ansätze aufeinander zu und voneinander
weg, so daß dadurch die vom Ringrahmen gebildete Durchmesseröffnung variierbar ist, ohne daß dabei die
axiale Länge des Ringrahmens und der daran angebrachten Herzklappe merklich beeinflußt wird. Die Verbindung
des Federstahldrahtes in der Mitte eines der Verbindungsabschnitte mittels einer rohrförmigen Hül-
det ist und daß die U-Schenkel '20) über einen Teil 35 se, vorzugsweise als Krimpverbindung, ermöglicht es,
ihrer Länge parallel zueinander angeordnet sind.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64790076A | 1976-01-09 | 1976-01-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2700531A1 DE2700531A1 (de) | 1977-07-14 |
| DE2700531C2 true DE2700531C2 (de) | 1985-04-04 |
Family
ID=24598706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2700531A Expired DE2700531C2 (de) | 1976-01-09 | 1977-01-07 | Rahmengerüst für eine Herzklappe |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US4106129A (de) |
| JP (1) | JPS595299B2 (de) |
| AU (1) | AU503001B2 (de) |
| BR (1) | BR7608469A (de) |
| CA (1) | CA1069652A (de) |
| DE (1) | DE2700531C2 (de) |
| FR (1) | FR2337543A1 (de) |
| GB (1) | GB1538204A (de) |
| MX (1) | MX144006A (de) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7320704B2 (en) | 2004-05-05 | 2008-01-22 | Direct Flow Medical, Inc. | Nonstented temporary valve for cardiovascular therapy |
| US7641686B2 (en) | 2004-04-23 | 2010-01-05 | Direct Flow Medical, Inc. | Percutaneous heart valve with stentless support |
| US7935144B2 (en) | 2006-10-19 | 2011-05-03 | Direct Flow Medical, Inc. | Profile reduction of valve implant |
| US8133213B2 (en) | 2006-10-19 | 2012-03-13 | Direct Flow Medical, Inc. | Catheter guidance through a calcified aortic valve |
| US8568477B2 (en) | 2005-06-07 | 2013-10-29 | Direct Flow Medical, Inc. | Stentless aortic valve replacement with high radial strength |
| US9308360B2 (en) | 2007-08-23 | 2016-04-12 | Direct Flow Medical, Inc. | Translumenally implantable heart valve with formed in place support |
Families Citing this family (578)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR206762A1 (es) * | 1976-01-01 | 1976-08-13 | Pisanu A | Bioprotesis de bajo perfil derivada de la valvula aortica heterologa de porcino |
| US4297749A (en) * | 1977-04-25 | 1981-11-03 | Albany International Corp. | Heart valve prosthesis |
| GB2056023B (en) * | 1979-08-06 | 1983-08-10 | Ross D N Bodnar E | Stent for a cardiac valve |
| RO78309A2 (ro) * | 1981-02-04 | 1983-02-01 | Spitalul Clinic,Ro | Bioproteza valvulara cardiaca si procedeu de realizare |
| US4816029A (en) * | 1981-05-07 | 1989-03-28 | Medtronic, Inc. | Stent for aortic heart valve |
| US4345340A (en) * | 1981-05-07 | 1982-08-24 | Vascor, Inc. | Stent for mitral/tricuspid heart valve |
| US4372743A (en) * | 1981-06-22 | 1983-02-08 | American Hospital Supply Corp. | Low-pressure fixation of valvular tissue intended for implantation |
| US4364126A (en) * | 1981-07-28 | 1982-12-21 | Vascor, Inc. | Heart valve with removable cusp protector band |
| US4501030A (en) * | 1981-08-17 | 1985-02-26 | American Hospital Supply Corporation | Method of leaflet attachment for prosthetic heart valves |
| US4865600A (en) * | 1981-08-25 | 1989-09-12 | Baxter International Inc. | Mitral valve holder |
| US7018407B1 (en) * | 1981-10-29 | 2006-03-28 | Medtronic | Valve holder for tricuspid heart valve |
| US4451936A (en) * | 1981-12-21 | 1984-06-05 | American Hospital Supply Corporation | Supra-annular aortic valve |
| EP0084395B1 (de) * | 1982-01-20 | 1986-08-13 | Martin Morris Black | Künstliche Herzklappen |
| US4680031A (en) * | 1982-11-29 | 1987-07-14 | Tascon Medical Technology Corporation | Heart valve prosthesis |
| US4892541A (en) * | 1982-11-29 | 1990-01-09 | Tascon Medical Technology Corporation | Heart valve prosthesis |
| GB8300636D0 (en) * | 1983-01-11 | 1983-02-09 | Black M M | Heart valve replacements |
| US4629459A (en) * | 1983-12-28 | 1986-12-16 | Shiley Inc. | Alternate stent covering for tissue valves |
| IT1208326B (it) * | 1984-03-16 | 1989-06-12 | Sorin Biomedica Spa | Protesi valvolare cardiaca provvista di lembi valvolari di tessuto biologico |
| DE3426300A1 (de) * | 1984-07-17 | 1986-01-30 | Doguhan Dr.med. 6000 Frankfurt Baykut | Zweiwegeventil und seine verwendung als herzklappenprothese |
| US4759758A (en) * | 1984-12-07 | 1988-07-26 | Shlomo Gabbay | Prosthetic heart valve |
| DE3507109A1 (de) * | 1985-03-01 | 1986-09-04 | Naučno-issledovatel'skij institut chirurgii imeni A.V. Višnevskogo Akademii medicinskich nauk SSSR, Moskau/Moskva | Herzklappenprothese |
| CH672247A5 (de) * | 1986-03-06 | 1989-11-15 | Mo Vysshee Tekhnicheskoe Uchil | |
| SE453258B (sv) * | 1986-04-21 | 1988-01-25 | Medinvent Sa | Elastisk, sjelvexpanderande protes samt forfarande for dess framstellning |
| US4725274A (en) * | 1986-10-24 | 1988-02-16 | Baxter Travenol Laboratories, Inc. | Prosthetic heart valve |
| US4851000A (en) * | 1987-07-31 | 1989-07-25 | Pacific Biomedical Holdings, Ltd. | Bioprosthetic valve stent |
| US5133732A (en) | 1987-10-19 | 1992-07-28 | Medtronic, Inc. | Intravascular stent |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1268484A (en) * | 1968-06-28 | 1972-03-29 | Brian John Bellhouse | Improvements relating to non-return valves particularly as prosthetics |
| FR2038843A5 (en) * | 1969-03-31 | 1971-01-08 | Dassault Electronique | Aortic valve support |
| US3714671A (en) * | 1970-11-30 | 1973-02-06 | Cutter Lab | Tissue-type heart valve with a graft support ring or stent |
| US3755823A (en) * | 1971-04-23 | 1973-09-04 | Hancock Laboratories Inc | Flexible stent for heart valve |
| JPS4940999A (de) * | 1972-08-25 | 1974-04-17 | ||
| JPS5737340B2 (de) * | 1973-11-15 | 1982-08-09 |
-
1976
- 1976-11-10 CA CA265,368A patent/CA1069652A/en not_active Expired
- 1976-11-15 GB GB47554/76A patent/GB1538204A/en not_active Expired
- 1976-11-18 AU AU19755/76A patent/AU503001B2/en not_active Expired
- 1976-11-19 JP JP51140077A patent/JPS595299B2/ja not_active Expired
- 1976-12-08 FR FR7636928A patent/FR2337543A1/fr active Granted
- 1976-12-17 BR BR7608469A patent/BR7608469A/pt unknown
-
1977
- 1977-01-04 MX MX167576A patent/MX144006A/es unknown
- 1977-01-07 DE DE2700531A patent/DE2700531C2/de not_active Expired
- 1977-08-26 US US05/827,961 patent/US4106129A/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7641686B2 (en) | 2004-04-23 | 2010-01-05 | Direct Flow Medical, Inc. | Percutaneous heart valve with stentless support |
| US7320704B2 (en) | 2004-05-05 | 2008-01-22 | Direct Flow Medical, Inc. | Nonstented temporary valve for cardiovascular therapy |
| US7435257B2 (en) | 2004-05-05 | 2008-10-14 | Direct Flow Medical, Inc. | Methods of cardiac valve replacement using nonstented prosthetic valve |
| US7445630B2 (en) | 2004-05-05 | 2008-11-04 | Direct Flow Medical, Inc. | Method of in situ formation of translumenally deployable heart valve support |
| US7534259B2 (en) | 2004-05-05 | 2009-05-19 | Direct Flow Medical, Inc. | Nonstented heart valves with formed in situ support |
| US7556645B2 (en) | 2004-05-05 | 2009-07-07 | Direct Flow Medical, Inc. | Translumenally implantable heart valve with formed in place support |
| US10449040B2 (en) | 2004-05-05 | 2019-10-22 | Speyside Medical, LLC | Method of treating a patient using a retrievable transcatheter prosthetic heart valve |
| US8012201B2 (en) | 2004-05-05 | 2011-09-06 | Direct Flow Medical, Inc. | Translumenally implantable heart valve with multiple chamber formed in place support |
| US9510941B2 (en) | 2004-05-05 | 2016-12-06 | Direct Flow Medical, Inc. | Method of treating a patient using a retrievable transcatheter prosthetic heart valve |
| US8308796B2 (en) | 2004-05-05 | 2012-11-13 | Direct Flow Medical, Inc. | Method of in situ formation of translumenally deployable heart valve support |
| US8377118B2 (en) | 2004-05-05 | 2013-02-19 | Direct Flow Medical, Inc. | Unstented heart valve with formed in place support structure |
| US8568477B2 (en) | 2005-06-07 | 2013-10-29 | Direct Flow Medical, Inc. | Stentless aortic valve replacement with high radial strength |
| US8556881B2 (en) | 2006-10-19 | 2013-10-15 | Direct Flow Medical, Inc. | Catheter guidance through a calcified aortic valve |
| US8133213B2 (en) | 2006-10-19 | 2012-03-13 | Direct Flow Medical, Inc. | Catheter guidance through a calcified aortic valve |
| US9572661B2 (en) | 2006-10-19 | 2017-02-21 | Direct Flow Medical, Inc. | Profile reduction of valve implant |
| US7935144B2 (en) | 2006-10-19 | 2011-05-03 | Direct Flow Medical, Inc. | Profile reduction of valve implant |
| US9308360B2 (en) | 2007-08-23 | 2016-04-12 | Direct Flow Medical, Inc. | Translumenally implantable heart valve with formed in place support |
Also Published As
| Publication number | Publication date |
|---|---|
| US4106129A (en) | 1978-08-15 |
| FR2337543B1 (de) | 1983-01-07 |
| GB1538204A (en) | 1979-01-10 |
| CA1069652A (en) | 1980-01-15 |
| AU503001B2 (en) | 1979-08-16 |
| JPS5286296A (en) | 1977-07-18 |
| JPS595299B2 (ja) | 1984-02-03 |
| AU1975576A (en) | 1978-05-25 |
| DE2700531A1 (de) | 1977-07-14 |
| FR2337543A1 (fr) | 1977-08-05 |
| BR7608469A (pt) | 1977-12-20 |
| MX144006A (es) | 1981-08-18 |
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