DE3710794A1 - Implantable capsule connectable to the blood stream for transcutaneous introduction of substances or live cells which are exchanged with blood via diaphragms having a specific pore size - Google Patents
Implantable capsule connectable to the blood stream for transcutaneous introduction of substances or live cells which are exchanged with blood via diaphragms having a specific pore sizeInfo
- Publication number
- DE3710794A1 DE3710794A1 DE19873710794 DE3710794A DE3710794A1 DE 3710794 A1 DE3710794 A1 DE 3710794A1 DE 19873710794 DE19873710794 DE 19873710794 DE 3710794 A DE3710794 A DE 3710794A DE 3710794 A1 DE3710794 A1 DE 3710794A1
- Authority
- DE
- Germany
- Prior art keywords
- membrane
- blood
- implantable
- capsule
- pore size
- 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.)
- Granted
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
- A61F2/022—Artificial gland structures using bioreactors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
- A61M31/002—Devices for releasing a drug at a continuous and controlled rate for a prolonged period of time
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/02—Access sites
- A61M39/0208—Subcutaneous access sites for injecting or removing fluids
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Animal Behavior & Ethology (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Transplantation (AREA)
- Medicinal Chemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Chemical & Material Sciences (AREA)
- Pulmonology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Vascular Medicine (AREA)
- Prostheses (AREA)
- External Artificial Organs (AREA)
Abstract
Description
Zweck der Erfindung ist die Konstruktion einer implantierbaren Kapsel für medizi nische Anwendungen, mit folgenden Eigenschaften:The purpose of the invention is the construction of an implantable capsule for medical purposes African applications with the following properties:
- a) Unter die Haut implantierbar.a) Implantable under the skin.
- b) Mit zwei Anschlußmöglichkeiten versehen, von denen eine mit dem artiellen, die andere mit dem venösen System verbunden werden kann.b) Provided with two connection options, one of which has the artificial, the other can be connected to the venous system.
- c) Das Innere der Kapsel ist in zwei Kompartimente aufgeteilt, die über eine Membran bestimmter Wanddurchlässigkeit miteinander in Verbindung stehen.c) The interior of the capsule is divided into two compartments, each one Membrane of certain wall permeability are connected.
- d) Eines der beiden Kompartimente nach c) wird von Blut durchströmt, das mittels der Anschlußmöglichkeiten nach b) zu- und abgeführt wird.d) Blood flows through one of the two compartments according to c) the connection options according to b) is supplied and discharged.
- e) Das zweie Kompartiment nach c) ist der Punktion durch eine an der Kapsel ange brachten elastischen Membran zugänglich, so daß in dieses Kompartiment Stoffe eingebracht und wieder entfernt werden können.e) The second compartment according to c) is punctured by one on the capsule brought accessible elastic membrane, so that in this compartment fabrics can be introduced and removed again.
- f) Die in das unter e) beschriebene Kompartiment eingebrachten Stoffe stehen mit dem Blutstrom insoweit im Austausch, wie es die Porengröße der Wände der Membran wie in c) beschrieben, zuläßt, d. h., daß Stoffe, deren Moleküldurchmesser kleiner ist, als der Durchmesser der Poren der Membran, nach jeder Richtung ausge tauscht werden können.f) The substances brought into the compartment described under e) are available in exchange with the blood flow insofar as it corresponds to the pore size of the walls of the Membrane as described in c), d. that is, substances whose molecular diameter is smaller than the diameter of the pores of the membrane in every direction can be exchanged.
Ein Beispiel für die Ausführung einer solchen Kapsel zeigt Fig. 1:An example of the implementation of such a capsule is shown in FIG. 1:
Eine Kapsel (1), vorzugsweise aus gewebeverträglichem Kunststoff, ist auf einer Seite durch eine Membran (2) aus gummielastischen, sich nach der Punktion mit einer Kanüle wieder dicht verschließendem Material abgeschlossen.A capsule ( 1 ), preferably made of plastic that is compatible with tissue, is sealed on one side by a membrane ( 2 ) made of rubber-elastic material that closes again with a cannula after the puncture.
Durch eine Öffnung (4) der Kapsel tritt ein Rohr oder Schlauch (8) ein, durch eine weitere Öffnung (3) tritt ein zweites Rohr oder Schlauch (7) aus.A tube or hose ( 8 ) enters through an opening ( 4 ) of the capsule, and a second tube or hose ( 7 ) exits through a further opening ( 3 ).
Rohr oder Schlauch (8) können mit dem artiellen Teil des Blutkreislaufs verbunden werden, Rohr oder Schlauch (7) mit dem venösen Teil. Tube or tube ( 8 ) can be connected to the artificial part of the bloodstream, tube or tube ( 7 ) to the venous part.
Im Innern der Kapsel teilt sich das Rohr oder der Schlauch (8) in ein Bünden (6) von Kapillaren (5) auf, welches mit dem auswechselbaren Kammerinhalt in Kontakt steht. Dieses Bündel vereinigt sich wieder und mündet in Rohr oder Schlauch (7).Inside the capsule, the tube or hose ( 8 ) divides into a bundle ( 6 ) of capillaries ( 5 ) which is in contact with the replaceable chamber contents. This bundle reunites and ends in a tube or hose ( 7 ).
Wegen der Druckdifferenz zwischen artiellem und venösem System kommt ein Blutstrom zustande, der sich im Innern der Kapsel auf die einzelnen Kapillaren aufteilt.Because of the pressure difference between the artificial and venous system comes a blood flow occurs, which is inside the capsule on the individual capillaries divides.
Um eindeutige Strömungsrichtung des Blutstroms zu gewährleisten, kann ein Rück schlagventil (14) vorgesehen werden.In order to ensure a clear flow direction of the blood flow, a check valve ( 14 ) can be provided.
Die Aufteilung des Blutstroms in Kapillaren wird gewählt, um Störunmgen durch Gerin nung zu vermeiden. Das erste Kompartiment entspricht dem Innenraum der Kapillaren (5), das zweite dem Raum innerhalb der Kapsel (1), aber außerhalb der Kapillaren (5).The division of the blood flow into capillaries is chosen in order to avoid interference from coagulation. The first compartment corresponds to the interior of the capillaries ( 5 ), the second to the space inside the capsule ( 1 ), but outside the capillaries ( 5 ).
Eine weitere vorteilhafte Ausgestaltung ist in Fig. 2 dargestellt.Another advantageous embodiment is shown in FIG. 2.
Die Bezeichnungen 1, 2, 3, 4, 7, 8, 14 entsprechen denen in Fig. 1. Anstatt durch Kapilla ren (5) wie in Fig. 1 dargestellt, fließt das Blut hier durch Vertiefungen (10), die in den Träger (9) eingearbeitet sind und die mittels einer Membran (12) abgedeckt sind.The designations 1, 2, 3, 4, 7, 8, 14 correspond to those in Fig. 1. Instead of capillaries ( 5 ) as shown in Fig. 1, the blood flows here through depressions ( 10 ), which in the carrier ( 9 ) are incorporated and are covered by a membrane ( 12 ).
Bei dieser Ausführungsform entspricht das erste Kompartiment dem Raum in den Ver tiefungen (10) unter der Membran (12), das zweite dem Raum innerhalb der Kapsel (1) oberhalb von Membran (12).In this embodiment, the first compartment corresponds to the space in the recesses ( 10 ) below the membrane ( 12 ), the second to the space inside the capsule ( 1 ) above the membrane ( 12 ).
Eine weitere vorteilhafte Ausgestaltung ist in Fig. 3 dargestellt.Another advantageous embodiment is shown in FIG. 3.
Die Bezeichnungen 1, 2, 3, 4, 7, 8, 14 entsprechen denen in Fig. 1 und Fig. 2.The designations 1, 2, 3, 4, 7, 8, 14 correspond to those in Fig. 1 and Fig. 2.
Bei dieser Ausführungsform fließt das Blut durch eine an der Innenwand an der Kapsel (1) schraubenförmig angeordneten Kapillare (15). Das erste Kompartiment entspricht dem Innenraum der Kapillare (15), das zweite dem Raum innerhalb der Kapsel (1), aber außerhalb der Kapillare (15).In this embodiment, the blood flows through a capillary ( 15 ) arranged helically on the inner wall of the capsule ( 1 ). The first compartment corresponds to the interior of the capillary ( 15 ), the second to the space inside the capsule ( 1 ), but outside the capillary ( 15 ).
Bei einem bevorzugten Anwendungsfall werden die implantierte und an den Blutstrom angeschlossene Kapsel per transcutane Punktion lebende Pankreas-A-Zellen heterologe nen oder xerogenen Ursprungs zusammen mit einer Nähr- oder Trägerlösung eingebracht. Die Poren der Wände der Kapillaren (5, 15) bzw. die Poren der Membran (12) sind so be messen, daß Nährstoffe und Sauerstoff auf dem Blut zu der Zellkultur gelangen können kleines Molekül, und kann, bei geeigneter Porengröße der Kapillarwände, ins Blut abge geben werden.In a preferred application, the capsule implanted and connected to the blood stream by transcutaneous puncture, live pancreatic A cells of heterologous or xerogenic origin are introduced together with a nutrient or carrier solution. The pores of the walls of the capillaries ( 5, 15 ) or the pores of the membrane ( 12 ) are so be measured that nutrients and oxygen on the blood can get to the cell culture small molecule, and, with a suitable pore size of the capillary walls, ins Blood will be given.
Ein ähnliches Prinzip hat die Natur bei der Plazenta verwirklicht, deren trennende Barriere ebenfalls Immunprozesse weitgehend ausschließt.Nature has implemented a similar principle in the placenta, its separating Barrier also largely excludes immune processes.
Das Implantat stellt also in dieser Anwendungsform einen Ersatz für eine insuffiziente innersekretorische Funktion einer Bauchspeicheldrüse dar.In this form of application, the implant therefore provides a replacement for an insufficient one intra-secretory function of a pancreas.
Durch die leichte Zugänglichkeit des Kapselinnenraumes können die Zellen beliebig eingebracht, ausgetauscht, entfernt oder Stoffe hinzugefügt werden.Due to the easy accessibility of the interior of the capsule, the cells can be placed anywhere introduced, exchanged, removed or substances added.
Diese Anordnung ist nicht auf Pankreas-A-Zellen beschränkt. Es können, bei geeigneter Wahl der Porengröße der Kapillarwände, andere Zellen von innersekretorischen Drüsen Anwendung finden, beispielsweise Zellen der Nebenniere oder der Schilddrüse.This arrangement is not limited to pancreatic A cells. It can, if appropriate Choice of the pore size of the capillary walls, other cells of the secretory glands Find application, for example cells of the adrenal gland or the thyroid.
Prinzip und Vorteil der Anordnung ist, daß Zellen in freiem Stoffaustausch mit einem fremden Körper stehen können, ohne daß wesentliche Immunprozesse stattfinden.The principle and advantage of the arrangement is that cells exchange freely with one another foreign bodies can stand without essential immune processes taking place.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873710794 DE3710794C2 (en) | 1987-03-31 | 1987-03-31 | Implantable capsule with rubber-elastic puncture membrane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873710794 DE3710794C2 (en) | 1987-03-31 | 1987-03-31 | Implantable capsule with rubber-elastic puncture membrane |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3710794A1 true DE3710794A1 (en) | 1988-11-17 |
DE3710794C2 DE3710794C2 (en) | 1995-02-02 |
Family
ID=6324531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19873710794 Expired - Fee Related DE3710794C2 (en) | 1987-03-31 | 1987-03-31 | Implantable capsule with rubber-elastic puncture membrane |
Country Status (1)
Country | Link |
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DE (1) | DE3710794C2 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993000129A1 (en) * | 1991-06-20 | 1993-01-07 | Milosevic Zeljko | Implantable port |
EP0571525A1 (en) * | 1991-02-11 | 1993-12-01 | OMMAYA, Ayub K. | Spinal fluid driven artificial organ |
DE4229526A1 (en) * | 1992-09-07 | 1994-03-10 | Juergen Dr Schrezenmeir | Transplant capsule comprising tissue or cells and oxygen carriers - to introduce e.g. insulin producing cells into human body; has long life span owing to internal oxygen supply |
WO1994020076A1 (en) * | 1993-03-01 | 1994-09-15 | Giampapa Vincent C | Subcutaneous implantable multiple agent delivery system |
EP0652735A1 (en) * | 1992-07-30 | 1995-05-17 | The University Of Toledo | Bioartificial pancreas |
CN1101185C (en) * | 1999-01-28 | 2003-02-12 | 中国医学科学院生物医学工程研究所 | Release-controlling medicinal capsule able to form on-wall porous structure in body |
WO2005089671A1 (en) * | 2004-03-19 | 2005-09-29 | Microislet, Inc. | Implantable intravascular delivery device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3797485A (en) * | 1971-03-26 | 1974-03-19 | Alza Corp | Novel drug delivery device for administering drug into blood circulation in blood vessel |
US4402694A (en) * | 1981-07-16 | 1983-09-06 | Biotek, Inc. | Body cavity access device containing a hormone source |
DE3518841A1 (en) * | 1985-05-24 | 1986-11-27 | Siemens AG, 1000 Berlin und 8000 München | Piercable septum for an implantable medicament metering device |
-
1987
- 1987-03-31 DE DE19873710794 patent/DE3710794C2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3797485A (en) * | 1971-03-26 | 1974-03-19 | Alza Corp | Novel drug delivery device for administering drug into blood circulation in blood vessel |
US4402694A (en) * | 1981-07-16 | 1983-09-06 | Biotek, Inc. | Body cavity access device containing a hormone source |
DE3518841A1 (en) * | 1985-05-24 | 1986-11-27 | Siemens AG, 1000 Berlin und 8000 München | Piercable septum for an implantable medicament metering device |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0571525A1 (en) * | 1991-02-11 | 1993-12-01 | OMMAYA, Ayub K. | Spinal fluid driven artificial organ |
EP0571525A4 (en) * | 1991-02-11 | 1994-04-13 | Ayub K. Ommaya | |
US5385582A (en) * | 1991-02-11 | 1995-01-31 | Ommaya; Ayub K. | Spinal fluid driven artificial organ |
US5391164A (en) * | 1991-05-03 | 1995-02-21 | Giampapa; Vincent C. | Subcutaneous implantable multiple-agent delivery system |
WO1993000129A1 (en) * | 1991-06-20 | 1993-01-07 | Milosevic Zeljko | Implantable port |
EP0652735A1 (en) * | 1992-07-30 | 1995-05-17 | The University Of Toledo | Bioartificial pancreas |
EP0652735A4 (en) * | 1992-07-30 | 1995-08-09 | Univ Toledo | Bioartificial pancreas. |
DE4229526A1 (en) * | 1992-09-07 | 1994-03-10 | Juergen Dr Schrezenmeir | Transplant capsule comprising tissue or cells and oxygen carriers - to introduce e.g. insulin producing cells into human body; has long life span owing to internal oxygen supply |
DE4229526B4 (en) * | 1992-09-07 | 2006-02-16 | Schrezenmeir, Jürgen, Dr. | Device for receiving and introducing biologically active tissues or cells into the human body |
WO1994020076A1 (en) * | 1993-03-01 | 1994-09-15 | Giampapa Vincent C | Subcutaneous implantable multiple agent delivery system |
CN1101185C (en) * | 1999-01-28 | 2003-02-12 | 中国医学科学院生物医学工程研究所 | Release-controlling medicinal capsule able to form on-wall porous structure in body |
WO2005089671A1 (en) * | 2004-03-19 | 2005-09-29 | Microislet, Inc. | Implantable intravascular delivery device |
Also Published As
Publication number | Publication date |
---|---|
DE3710794C2 (en) | 1995-02-02 |
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Legal Events
Date | Code | Title | Description |
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8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |