DE10327904B3 - Production of a heart valve prosthesis comprises pulsing a nutrient solution through a section of vein containing a valve in a bioreactor - Google Patents
Production of a heart valve prosthesis comprises pulsing a nutrient solution through a section of vein containing a valve in a bioreactor Download PDFInfo
- Publication number
- DE10327904B3 DE10327904B3 DE2003127904 DE10327904A DE10327904B3 DE 10327904 B3 DE10327904 B3 DE 10327904B3 DE 2003127904 DE2003127904 DE 2003127904 DE 10327904 A DE10327904 A DE 10327904A DE 10327904 B3 DE10327904 B3 DE 10327904B3
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- Germany
- Prior art keywords
- nutrient solution
- valve
- vein
- heart valve
- section
- 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 - Fee Related
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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
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3683—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment
-
- 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
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3604—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix characterised by the human or animal origin of the biological material, e.g. hair, fascia, fish scales, silk, shellac, pericardium, pleura, renal tissue, amniotic membrane, parenchymal tissue, fetal tissue, muscle tissue, fat tissue, enamel
- A61L27/3625—Vascular tissue, e.g. heart valves
-
- 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
- A61L27/36—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix
- A61L27/3641—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix characterised by the site of application in the body
- A61L27/3645—Connective tissue
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dermatology (AREA)
- Medicinal Chemistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Botany (AREA)
- Public Health (AREA)
- Vascular Medicine (AREA)
- Molecular Biology (AREA)
- Cardiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Urology & Nephrology (AREA)
- Zoology (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zur Herstellung biologischer Herzklappenprothesen.The invention relates to a method for the production of biological heart valve prostheses.
Es sind bereits Herzklappenprothesen bekannt, die für den operativen Herzklappenersatz zur Behandlung von Herzklappenerkrankungen eingesetzt werden. Man unterscheidet dabei mechanische von biologischen Herzklappenprothesen.They are already heart valve prostheses known for the operative heart valve replacement for the treatment of heart valve diseases be used. A distinction is made between mechanical and biological Prosthetic heart valves.
Mechanische Herzklappenprothesen sind Herzklappen, die aus extrem beständigen Materialien wie Metall und Kunststoff bestehen. Der Nachteil dieser An von Prothesen besteht darin, dass die körperfremden Materialien der Herzklappe Thrombosen verursachen. Deshalb müssen Patienten, die solche Prothesen tragen, blutgerinnungshemmende Medikamente einnehmen, die zu einer herabgesetzten Blutgerinnungsfähigkeit führen. Weil solche Antikoagulantien zu schwerwiegenden Nebenwirkungen führen können, bedarf die Einnahme einer kontinuierlichen Überwachung.Mechanical prosthetic heart valves are heart valves that are made of extremely durable materials such as metal and plastic. The disadvantage of this type of prostheses is in that the stranger Materials of the heart valve cause thrombosis. Therefore, patients who wear such prostheses, anticoagulant drugs ingesting, leading to decreased blood clotting ability to lead. Because such anticoagulants can lead to serious side effects taking continuous surveillance.
Biologische Herzklappenprothesen sind überwiegend natürliche Herzklappen vom Schwein oder in Form einer Herzklappe in ein Gerüst eingenähtes Rinderperikardgewebe. Sämtliche Materialien werden hierzu einer chemischen Behandlung unterzogen, die die Festigkeit des Gewebes erhöht und die Abwehrreaktion des Körpers gegen das Fremdgewebe reduziert. Neben den Abwehrreaktionen des Körpers besteht der Nachteil dieser An von Prothesen in der beschränkten Lebensdauer. Danach muss die gealterte Herzklappenprothese durch eine neue Prothese ersetzt werden.Biological heart valve prostheses are predominant natural Pork heart valves or bovine pericardial tissue sewn into a scaffold in the form of a heart valve. All For this purpose, materials are subjected to a chemical treatment, which increases the strength of the tissue and the immune response of the body reduced against the foreign tissue. In addition to the body's defense reactions the disadvantage of this type of prostheses in the limited life. After that, the aged prosthetic heart valve must be replaced by a new prosthesis be replaced.
Ein Verfahren zum Herstellen einer Herzklappe aus tierischem Material ist aus der WO 82/02829 A1 bekannt.A method of making one Heart valve made of animal material is known from WO 82/02829 A1.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung einer biologischen Herzklappenprothese mit guter Verträglichkeit zu schaffen.The invention is based on the object Process for the production of a biological heart valve prosthesis with good tolerance to accomplish.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst, die Unteransprüche geben bevorzugte Ausgestaltungen der Erfindung wieder.This object is achieved by the Features of claim 1 solved the subclaims represent preferred embodiments of the invention.
Das Verfahren greift hierfür auf funktionsfähige, lebende Venenklappen zurück, die im Verlauf des Verfahrens auf eine zur Verwendung als Herzklappenprothese geeignete Ausprägung gebracht werden. Vorzugsweise wird aus demselben zu behandelnden Patienten ein eine Venenklappe enthaltender Venenabschnitt aus der tiefen Beinvene, die ohne Begleiterscheinungen entbehrlich ist, entnommen. Eine Abstoßungsreaktion bei der Transplantation der Venenklappe als Herzklappenprothese nach Durchführung des Verfahrens kann so ausgeschlossen werden, da es sich bei der Venenklappe um autologes Gewebe handelt. Die Venenklappe ist jedoch vom Durchmesser zu klein, als das sie z.B. für den Pulmonalklappenersatz eingesetzt werden könnte.For this purpose, the process uses functional, living ones Venous valves back, which during the course of the procedure for use as a prosthetic heart valve suitable expression to be brought. It is preferably to be treated from the same Patients a vein section containing a venous valve from the deep leg vein, which can be dispensed with without side effects, taken. A rejection reaction in the transplantation of the venous valve as a heart valve prosthesis after implementation The procedure can be excluded because it is the Venous valve is autologous tissue. However, the venous valve is from Diameter too small to e.g. for the pulmonary valve replacement could be used.
Deshalb wird im Folgenden der Venenabschnitt in einen Bioreaktor mit Nährlösung eingesetzt, wobei in einem Kreislauf Nährlösung pulsatil durch den Venenabschnitt gepumpt wird. Dabei pulsiert die Nährlösung im Kreislauf bevorzugt mit einer Frequenz ähnlich der Herzfrequenz. Als Reaktion auf langsames, kontinuierliches oder schrittweises Erhöhen des Flusses oder Drucks passt sich der Venenabschnitt mit der enthaltenden Venenklappe den Durchflussbedingungen durch Wachstum an. Dabei wird der Fluss oder Druck überprüft und an einen Wert unterhalb einer funktionellen Klappeninsuffizienz eingestellt. Es sei in diesem Zusammenhang daraufhin gewiesen, dass ein Zusammenhang zwischen Fluss und Druck besteht. Eine Veränderung des Flusses führt bei konstantem Widerstand auch zu einer Veränderung des Druckes und umgekehrt. Deshalb führt die Modifikation einer der beiden Regelgrößen auch zur Veränderung der zweiten Regelgröße.Therefore, in the following the vein section placed in a bioreactor with nutrient solution, whereby in a nutrient solution pulsatile is pumped through the vein section. The nutrient solution pulsates in the Circulation preferred with a frequency similar to the heart rate. As Respond to slowly, continuously, or gradually increasing the Flow or pressure matches the vein section with the containing one Venous valve adapts to flow conditions through growth. Doing so the flow or pressure checked and on set a value below a functional valve insufficiency. In this connection it should be pointed out that a connection between flow and pressure. A change in the flow leads to constant resistance to a change in pressure and vice versa. Therefore leads the Modification of one of the two control variables also for change the second controlled variable.
In einer besonders bevorzugten Ausgestaltung der Erfindung werden der Nährlösung Wachstumshormone und/oder Signaltransduktoren beigefügt, die eine gezielte Wachstumsförderung bewirken.In a particularly preferred embodiment the invention, growth hormones are the nutrient solution and / or signal transducers attached, which provide targeted growth promotion cause.
Nach Erreichen einer für die Verwendung als Herzklappenprothese vorteilhaften Form und Ausprägung, wird die mit dem Verfahren der vorliegenden Erfindung modifizierte Venenklappe entnommen und steht für die Verwendung als biologische Herzklappenprothese zur Verfügung.After reaching one for use as a heart valve prosthesis advantageous shape and expression the venous valve modified by the method of the present invention taken and stands for use as a biological prosthetic heart valve.
Claims (6)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003127904 DE10327904B3 (en) | 2003-06-20 | 2003-06-20 | Production of a heart valve prosthesis comprises pulsing a nutrient solution through a section of vein containing a valve in a bioreactor |
EP04738622A EP1641501A1 (en) | 2003-06-20 | 2004-06-05 | Method for the production of biological heart valve prostheses |
PCT/DE2004/001168 WO2004112858A1 (en) | 2003-06-20 | 2004-06-05 | Method for the production of biological heart valve prostheses |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003127904 DE10327904B3 (en) | 2003-06-20 | 2003-06-20 | Production of a heart valve prosthesis comprises pulsing a nutrient solution through a section of vein containing a valve in a bioreactor |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10327904B3 true DE10327904B3 (en) | 2004-07-29 |
Family
ID=32603266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2003127904 Expired - Fee Related DE10327904B3 (en) | 2003-06-20 | 2003-06-20 | Production of a heart valve prosthesis comprises pulsing a nutrient solution through a section of vein containing a valve in a bioreactor |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1641501A1 (en) |
DE (1) | DE10327904B3 (en) |
WO (1) | WO2004112858A1 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1982002829A1 (en) * | 1981-02-04 | 1982-09-02 | Pop D Popa Ioan | Cardiac valvular bioprosthesis and the proceeding of achievement |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19919625C2 (en) * | 1999-04-29 | 2002-10-31 | Symetis Ag Zuerich | In vitro method for producing a homologous heart valve and valve that can be produced by this method |
US6592618B2 (en) * | 2000-02-29 | 2003-07-15 | The Brigham And Women's Hospital, Inc. | In vitro modification of cardiac valvular xenografts |
-
2003
- 2003-06-20 DE DE2003127904 patent/DE10327904B3/en not_active Expired - Fee Related
-
2004
- 2004-06-05 EP EP04738622A patent/EP1641501A1/en not_active Withdrawn
- 2004-06-05 WO PCT/DE2004/001168 patent/WO2004112858A1/en not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1982002829A1 (en) * | 1981-02-04 | 1982-09-02 | Pop D Popa Ioan | Cardiac valvular bioprosthesis and the proceeding of achievement |
Also Published As
Publication number | Publication date |
---|---|
WO2004112858A1 (en) | 2004-12-29 |
EP1641501A1 (en) | 2006-04-05 |
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Legal Events
Date | Code | Title | Description |
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8100 | Publication of the examined application without publication of unexamined application | ||
8364 | No opposition during term of opposition | ||
R082 | Change of representative |
Representative=s name: BOEHMERT & BOEHMERT ANWALTSPARTNERSCHAFT MBB -, DE Representative=s name: BOEHMERT & BOEHMERT, DE |
|
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee | ||
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: C12N0005080000 Ipc: C12N0005071000 |