EP1651292A1 - Device for the dosed delivery of a fluid - Google Patents

Device for the dosed delivery of a fluid

Info

Publication number
EP1651292A1
EP1651292A1 EP04737404A EP04737404A EP1651292A1 EP 1651292 A1 EP1651292 A1 EP 1651292A1 EP 04737404 A EP04737404 A EP 04737404A EP 04737404 A EP04737404 A EP 04737404A EP 1651292 A1 EP1651292 A1 EP 1651292A1
Authority
EP
European Patent Office
Prior art keywords
housing
chamber
liquid
infusion
pressure medium
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.)
Withdrawn
Application number
EP04737404A
Other languages
German (de)
French (fr)
Inventor
Bernhard GALLNBÖCK
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pro-Med Medizinische Produktions- und Handels-AG
Original Assignee
Pro-Med Medizinische Produktions- und Handels-AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pro-Med Medizinische Produktions- und Handels-AG filed Critical Pro-Med Medizinische Produktions- und Handels-AG
Publication of EP1651292A1 publication Critical patent/EP1651292A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/148—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons flexible, e.g. independent bags
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/148—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons flexible, e.g. independent bags
    • A61M5/1483—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons flexible, e.g. independent bags using flexible bags externally pressurised by fluid pressure
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M2005/14204—Pressure infusion, e.g. using pumps with gas-producing electrochemical cell

Definitions

  • the invention relates to a device for the metered delivery of a liquid, in particular an infusion liquid, with a housing which has a liquid chamber and a pressure medium chamber, via which a flexible wall of the liquid chamber can be acted upon from the outside with pressure medium.
  • the liquid chamber, the pressure medium chamber and a pressure gas generator are accommodated in a common housing.
  • the gas pressure generator consists of a reaction chamber which contains an organic acid, usually citric acid in the required concentration and a carbonate preparation, usually sodium carbonate with binders, separated from the container by a membrane, which is pressed into a tablet.
  • a reaction gas usually carbon dioxide, which is conducted via a hydrophobic, gas-permeable membrane and via a line into the pressure medium chamber from where the infusion liquid is pressurized via the flexible wall of the liquid chamber.
  • the infusion speed can take place via the gas pressure and / or via a control valve in the infusion line leading from the device to the patient.
  • Such devices for metered delivery An infusion liquid has the advantage that you can supply a patient with infusion liquid over a longer period of time at an almost constant pressure, the patient remaining mobile during the administration of the infusion since he can carry the device on his body.
  • a disadvantage of this known device is that it is only a disposable product, which is relatively expensive to produce and must be disposed of after use with increased effort.
  • the invention is therefore based on the object of providing a device for the metered delivery of a liquid, in particular an infusion liquid, which can be manufactured inexpensively, which is at least largely reusable and causes only low operating costs.
  • the invention solves this problem in that the housing consists of two detachably connected parts, one of which forms the pressure medium chamber and the other interchangeably receives the liquid chamber designed as a liquid-tight infusion bag, and in that the housing part with the pressure medium chamber relative to the housing part receiving the infusion bag sealed by a membrane and connected to a gas pressure source.
  • a reusable device for the metered delivery of a liquid is created in a simple manner in that medicinal products filled or diluted in infusion bags or, for example, plant protection agents or fertilizers for plants can be inserted into the device in a simple manner, with infusion bags being different Dimensions and filling quantity can be used in a device according to the invention.
  • the infusion bag Before the metered delivery of the liquid, only the infusion bag has to be inserted into the associated housing part and the two housing parts must then be firmly connected to one another, after which the pressure medium chamber is filled with a pressure medium in this way can be that it acts directly on the envelope of the infusion bag via the membrane and thus ensures the expulsion of the liquid or the infusion liquid from the liquid chamber at the desired pressure.
  • the fact that the housing part with the pressure medium chamber is sealed from the housing part receiving the infusion bag by a membrane and connected to a gas pressure source results in a particularly simple, less fault-prone and reusable construction of a device according to the invention, which also causes only low operating costs.
  • the gas pressure source is connected, for example, to the housing part forming the pressure medium chamber or inserted into a corresponding recess formed by the pressure medium chamber, which results in particularly compact conditions.
  • One of the two housing parts releasably connected to one another thus receives the pressure medium chamber sealed by a membrane and the other housing part accommodates the infusion bag, as a result of which the infusion bag can be changed particularly quickly and easily.
  • the two housing parts are connected to one another in an articulated manner and have a locking device on the opposite side, as a result of which the two housing parts are obviously mutually apparent, but are nevertheless captively connected and lockable.
  • the gas pressure generators known from WO 95/23641 A1 are particularly recommended, which are preferably connected to the pressure medium chamber via a control and / or pressure reducing valve, in order to ensure the most constant, adjustable pressure over the entire administration period of the infusion liquid and that To be able to interrupt gas supply to the pressure medium chamber at any time if necessary.
  • a conventional pressure relief valve can be provided as the pressure reducing valve. To regulate the ventilation or to reset the membrane or to divert the gas when changing the infusion bag or the gas pressure It is advantageous if the gas pressure source is exchangeably connected to the control or pressure reducing valve assigned to the housing.
  • FIG. 1 shows a device according to the invention in plan view
  • Fig. 2 shows the device of Fig. 1 in section along the line ll-ll and
  • FIG 3 shows the device from FIGS. 1 and 2 in a front view.
  • the housing 1 consists of two housing parts 6, 7 which are articulated on one side by means of two hinge joints 8 and on the opposite side have a locking device 9 with which the two housing parts 6, 7 can be fixed in their position in a mutually closed position are.
  • one housing part 6 interchangeably accommodates the pressure medium chamber 3 and the other housing part 7 the liquid-tight infusion bag 2.
  • the housing part 6 with the pressure medium chamber 3 is sealed off from the housing part 7 receiving the infusion bag 2 by the membrane 5 and connected via a line 10 to an exchangeable gas pressure source 11.
  • the membrane is glued, welded or the like to the associated housing part 6, for example in the region of the parting plane of the two housing parts 6, 7 the gas pressure source 11 and the pressure medium chamber 3, a control valve 12 and a pressure reducing valve 13 are arranged, with which the gas supply from the gas pressure source 11 to the pressure medium chamber 3 can be controlled and regulated and the gas pressure can be limited to a preset maximum value. Since after use of the device according to the invention only the gas pressure source 11 and the infusion bag 2 need to be changed and the rest of the device should be reusable, the gas pressure source 11 is connected to the control valve 12 assigned to the housing 1 via a plug-in coupling 14.
  • the gas pressure source 11 consists of a container 15 with a hydrophobic, gas-permeable membrane 16, which absorbs an organic acid 17, in particular citric acid, in the required concentration and with a tablet separated from the acid 17 via a film 18 or the like 19 pressed carbonate preparation, in particular from sodium carbonate with binders.
  • an infusion bag 2 is inserted into the opened housing 1 (see FIG. 3), the infusion tube 20 of which is closed, for example, with a clamp (not shown) and then the housing part 6 receiving the pressure medium chamber 3 with the housing part 7 receiving the infusion bag 2 locked.
  • the gas pressure source 11 is then activated in that the tablet 19 is brought into contact with the acid 17 by destroying the film 18, after which the pressure medium, in particular carbon dioxide, is produced as a result of the chemical reaction taking place.
  • the gas-permeable membrane 16 ensures that only gases get into the pressure medium chamber 3 and liquids are retained in the container 15.
  • the gas pressure source 11 is intended for single use, but under certain circumstances several infusion bags can be infused in direct succession with the same gas pressure source 11.
  • the gas is introduced from the container 15 via the control valve 12 into the pressure medium chamber 3, where the membrane 5 is attached to the flexible wall 4 of the Infusion bag 2 nestles and the infusion liquid contained in the infusion bag 2 with the desired pressure to expel the infusion liquid from the infusion bag 2 through the infusion tube 20.
  • the infusion bag 2 can be removed from the opened housing 1 and disposed of, and the gas pressure source 11 can be removed from the housing 1, after which the membrane 5 is moved back into its basic position when the control valve 12 is open. After inserting a new infusion bag 2 into the housing 1 and plugging in a new gas pressure source, the device according to the invention is ready for operation again.

Abstract

The invention relates to a device for the dosed delivery of a fluid, in particular an infusion fluid. Said device comprises a housing (1), which has a fluid chamber and a pressurised medium chamber (3), by means of which the exterior of a flexible wall (4) of the fluid chamber is impinged by a pressurised medium. The aim of the invention is to provide a re-usable infusion pump using simple means. To achieve this, the housing (1) consists of two housing parts (6, 7) that can be detachably interconnected, one housing part containing the pressurised medium chamber (3) and the other holding the fluid-tight infusion bag (2) that is configured as an interchangeable fluid chamber. The housing part (6) containing the pressurised medium chamber (3) is sealed off from the housing part (7) that holds the infusion bag (2) by a membrane (5) and is connected to a pressurised gas source (11).

Description

Vorrichtung zur dosierten Abgabe einer FlüssigkeitDevice for the metered delivery of a liquid
Technisches GebietTechnical field
Die Erfindung bezieht sich auf eine Vorrichtung zur dosierten Abgabe einer Flüssigkeit, insbesondere einer Infusionsflüssigkeit, mit einem Gehäuse, das eine Flüssigkeitskammer und eine Druckmittelkammer aufweist, über die eine flexible Wand der Flüssigkeitskammer von außen mit Druckmittel beaufschlagbar ist.The invention relates to a device for the metered delivery of a liquid, in particular an infusion liquid, with a housing which has a liquid chamber and a pressure medium chamber, via which a flexible wall of the liquid chamber can be acted upon from the outside with pressure medium.
Stand der TechnikState of the art
Bei einer derartigen bekannten Vorrichtung (WO 95/23 641 A1), sind die Flüssigkeitskammer, die Druckmittelkammer und ein Druckgasgenerator in einem gemeinsamen Gehäuse untergebracht. Der Gasdruckgenerator besteht aus einer Reaktionskammer, die eine organische Säure, meist Zitronensäure in der benötigten Konzentration und eine, von dem Behältnis durch eine Membran getrennte Carbonatzubereitung, meist Natriumcarbonat mit Bindemitteln, enthält, die zu einer Tablette gepreßt ist. Zum Aktivieren des Gasdruckgenerators wird die Membran zwischen der Säure und dem Carbonat getrennt, "wonach das Carbonat mit der Säure reagiert und in der Folge ein Reaktionsgas, meist Kohlendioxid, freigibt, das über eine hydrophobe, gasdurchlässige Membran und über eine Leitung in die Druckmittelkammer geleitet wird, von wo aus die Infusionsflüssigkeit über die flexible Wand der Flüssigkeitskammer mit Druck beaufschlagt wird. Die Infusionsgeschwindigkeit kann über den Gasdruck und/oder über ein Regelventil in der von der Vorrichtung zum Patienten führenden Infusionsleitung erfolgen. Derartige Vorrichtungen zur dosierten Abgabe einer Infusionsflüssigkeit haben den Vorteil, daß mit Ihnen einem Patienten Infusionsflüssigkeit über einen längeren Zeitraum mit einem nahezu konstanten Druck zugeführt werden kann, wobei der Patient während der Verabreichung der Infusion mobil bleibt, da er die Vorrichtung am Körper tragen kann. Als nachteilig hat es sich bei dieser bekannten Vorrichtung erwiesen, daß diese lediglich ein Einwegprodukt ist, das verhältnismäßig teuer in der Produktion kommt und nach Gebrauch mit erhöhtem Aufwand entsorgt werden muß.In such a known device (WO 95/23 641 A1), the liquid chamber, the pressure medium chamber and a pressure gas generator are accommodated in a common housing. The gas pressure generator consists of a reaction chamber which contains an organic acid, usually citric acid in the required concentration and a carbonate preparation, usually sodium carbonate with binders, separated from the container by a membrane, which is pressed into a tablet. To activate the gas pressure generator, the membrane is separated between the acid and the carbonate, "after which the carbonate reacts with the acid and subsequently releases a reaction gas, usually carbon dioxide, which is conducted via a hydrophobic, gas-permeable membrane and via a line into the pressure medium chamber from where the infusion liquid is pressurized via the flexible wall of the liquid chamber. The infusion speed can take place via the gas pressure and / or via a control valve in the infusion line leading from the device to the patient. Such devices for metered delivery An infusion liquid has the advantage that you can supply a patient with infusion liquid over a longer period of time at an almost constant pressure, the patient remaining mobile during the administration of the infusion since he can carry the device on his body. A disadvantage of this known device is that it is only a disposable product, which is relatively expensive to produce and must be disposed of after use with increased effort.
Darstellung der ErfindungPresentation of the invention
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung zur dosierten Abgabe einer Flüssigkeit, insbesondere einer Infusionsflüssigkeit, zu schaffen, die kostengünstig gefertigt werden kann, die zumindest größtenteils wiederverwendbar ist und nur geringe Betriebskosten verursacht.The invention is therefore based on the object of providing a device for the metered delivery of a liquid, in particular an infusion liquid, which can be manufactured inexpensively, which is at least largely reusable and causes only low operating costs.
Die Erfindung löst diese Aufgabe dadurch, daß das Gehäuse aus zwei miteinander lösbar verbundenen Teilen besteht, von denen der eine die Druckmittelkammer ausbildet und der andere die als flüssigkeitsdichter Infusionsbeutel ausgebildete Flüssigkeitskammer auswechselbar aufnimmt, und daß der Gehäuseteil mit der Druckmittelkammer gegenüber dem den Infusionsbeutel aufnehmenden Gehäuseteil durch eine Membran abgedichtet und an eine Gasdruckquelle angeschlossen ist.The invention solves this problem in that the housing consists of two detachably connected parts, one of which forms the pressure medium chamber and the other interchangeably receives the liquid chamber designed as a liquid-tight infusion bag, and in that the housing part with the pressure medium chamber relative to the housing part receiving the infusion bag sealed by a membrane and connected to a gas pressure source.
Mit der Erfindung wird auf einfache Art und Weise eine wiederverwendbare Vorrichtung zur dosierten Abgabe einer Flüssigkeit geschaffen, indem in Infusionsbeutel abgefüllte bzw. verdünnte Arzneimittel oder beispielsweise Pflanzenschutzmittel bzw. Dünger für Pflanzen in einfacher Art und Weise in die Vorrichtung eingesetzt werden können, wobei Infusionsbeutel unterschiedlicher Dimensionen und Füllmenge in einer erfindungsgemäßen Vorrichtung zum Einsatz kommen können. Vor dem dosierten Abgeben der Flüssigkeit muß lediglich der Infusionsbeutel in das zugehörige Gehäuseteil eingesetzt und müssen die beiden Gehäuseteile anschließend fest miteinander verbunden werden, wonach die Druckmittelkammer derart mit einem Druckmittel gefüllt werden kann, daß es über die Membran direkt auf die Hülle des Infusionsbeutels einwirkt und somit für das Austreiben der Flüssigkeit bzw. der Infusionsflüssigkeit aus der Flüssigkeitskammer mit dem gewünschten Druck sorgt. Dadurch, daß der Gehäuseteil mit der Druckmittelkammer gegenüber dem den Infusionsbeutel aufnehmenden Gehäuseteil durch eine Membran abgedichtet und an eine Gasdruckquelle angeschlossen ist, ergibt sich eine besonders einfache, wenig störungsanfällige und widerverwendbare Konstruktion einer erfindungsgemäßen Vorrichtung, die zudem nur geringe Betriebskosten verursacht. Die Gasdruckquelle wird beispielsweise an das die Druckmittelkammer ausbildende Gehäuseteil angeschlossen oder in eine von der Druckmittelkammer ausgebildete, entsprechende Ausnehmung eingesetzt, wodurch sich besonders kompakte Verhältnisse ergeben.With the invention, a reusable device for the metered delivery of a liquid is created in a simple manner in that medicinal products filled or diluted in infusion bags or, for example, plant protection agents or fertilizers for plants can be inserted into the device in a simple manner, with infusion bags being different Dimensions and filling quantity can be used in a device according to the invention. Before the metered delivery of the liquid, only the infusion bag has to be inserted into the associated housing part and the two housing parts must then be firmly connected to one another, after which the pressure medium chamber is filled with a pressure medium in this way can be that it acts directly on the envelope of the infusion bag via the membrane and thus ensures the expulsion of the liquid or the infusion liquid from the liquid chamber at the desired pressure. The fact that the housing part with the pressure medium chamber is sealed from the housing part receiving the infusion bag by a membrane and connected to a gas pressure source results in a particularly simple, less fault-prone and reusable construction of a device according to the invention, which also causes only low operating costs. The gas pressure source is connected, for example, to the housing part forming the pressure medium chamber or inserted into a corresponding recess formed by the pressure medium chamber, which results in particularly compact conditions.
Der eine der beiden miteinander lösbar verbundenen Gehäuseteile nimmt somit die durch eine Membran abgedichtete Druckmittelkammer und der andere Gehäuseteil den Infusionsbeutel auf, wodurch ein Wechsel der Infusionsbeutel besonders rasch und einfach durchgeführt werden kann. Zudem empfiehlt es sich gemäß einer vorteilhaften Ausgestaltungsform der Erfindung, wenn die beiden Gehäuseteile miteinander auf einer Seite gelenkig verbunden sind und auf der gegenüberliegenden Seite eine Verriegelungseinrichtung aufweisen, wodurch die beiden Gehäuseteile zwar gegeneinander offenbar, aber dennoch unverlierbar miteinander verbunden und verriegelbar sind.One of the two housing parts releasably connected to one another thus receives the pressure medium chamber sealed by a membrane and the other housing part accommodates the infusion bag, as a result of which the infusion bag can be changed particularly quickly and easily. In addition, it is recommended according to an advantageous embodiment of the invention if the two housing parts are connected to one another in an articulated manner and have a locking device on the opposite side, as a result of which the two housing parts are obviously mutually apparent, but are nevertheless captively connected and lockable.
Als Gasdruckquelle empfehlen sich insbesondere die aus der WO 95/23641 A1 bekannten Gasdruckgeneratoren, die vorzugsweise über ein Steuer, und/oder Druckminderventil an die Druckmittelkammer angeschlossen sind, um über den gesamten Verabreichungszeitraum der Infusionsflüssigkeit für einen möglichst konstanten, einstellbaren Druck zu sorgen und die Gaszufuhr zur Druckmittelkammer bei Bedarf jederzeit unterbrechen zu können. Als Druckminderventil kann im einfachsten Fall ein herkömmliches Überdruckventil vorgesehen sein. Zur Regelung der Entlüftung bzw. zum Rücksetzen der Membrane bzw. zum Umleiten des Gases bei Wechsel des Infusionsbeutels oder des Gasdruckge- nerators ist es von Vorteil, wenn die Gasdruckquelle auswechselbar mit dem dem Gehäuse zugeordneten Steuer- bzw. Druckminderventil verbunden ist.As a gas pressure source, the gas pressure generators known from WO 95/23641 A1 are particularly recommended, which are preferably connected to the pressure medium chamber via a control and / or pressure reducing valve, in order to ensure the most constant, adjustable pressure over the entire administration period of the infusion liquid and that To be able to interrupt gas supply to the pressure medium chamber at any time if necessary. In the simplest case, a conventional pressure relief valve can be provided as the pressure reducing valve. To regulate the ventilation or to reset the membrane or to divert the gas when changing the infusion bag or the gas pressure It is advantageous if the gas pressure source is exchangeably connected to the control or pressure reducing valve assigned to the housing.
Kurze Beschreibung der ZeichnungBrief description of the drawing
In der Zeichnung ist die Erfindung anhand eines schematischen Ausführungsbeispieles dargestellt. Es zeigen:In the drawing, the invention is shown using a schematic embodiment. Show it:
Fig. 1 eine erfindungsgemäße Vorrichtung in Draufsicht,1 shows a device according to the invention in plan view,
Fig. 2 die Vorrichtung aus Fig. 1 im Schnitt nach der Linie ll-ll undFig. 2 shows the device of Fig. 1 in section along the line ll-ll and
Fig. 3 die Vorrichtung aus Fig. 1 und 2 in Vorderansicht.3 shows the device from FIGS. 1 and 2 in a front view.
Weg zur Ausführung der ErfindungWay of carrying out the invention
Eine erfindungsgemäße Vorrichtung zur dosierten Abgabe einer Infusionsflüssigkeit umfaßt ein Gehäuse 1 , das eine flexible Flüssigkeitskammer in Form eines Infusionsbeutels 2 aufnimmt und eine Druckmittelkammer 3 aufweist, über die eine flexible Wand 4 des Infusionsbeutels 2 von außen über eine Membran 5 mit Druckmittel beaufschlagbar ist. Das Gehäuse 1 besteht aus zwei Gehäuseteilen 6, 7, die miteinander auf einer Seite mittels zweier Scharniergelenke 8 gelenkig verbunden sind und auf der gegenüberliegenden Seite eine Verriegelungseinrichtung 9 aufweisen, mit der die beiden Gehäuseteile 6, 7 in gegeneinander geschlossener Stellung zueinander in ihrer Lage festlegbar sind.A device according to the invention for the metered delivery of an infusion liquid comprises a housing 1, which receives a flexible liquid chamber in the form of an infusion bag 2 and has a pressure medium chamber 3, via which a flexible wall 4 of the infusion bag 2 can be acted upon from the outside via a membrane 5 with pressure medium. The housing 1 consists of two housing parts 6, 7 which are articulated on one side by means of two hinge joints 8 and on the opposite side have a locking device 9 with which the two housing parts 6, 7 can be fixed in their position in a mutually closed position are.
Von den beiden miteinander lösbar verbundenen Gehäuseteilen 6, 7 nimmt der eine Gehäuseteil 6 die Druckmittelkammer 3 und der andere Gehäuseteil 7 den flüssigkeitsdichten Infusionsbeutel 2 auswechselbar auf. Der Gehäuseteil 6 mit der Druckmittelkammer 3 ist gegenüber dem den Infusionsbeutel 2 aufnehmenden Gehäuseteil 7 durch die Membran 5 abgedichtet und über eine Leitung 10 an eine auswechselbare Gasdruckquelle 11 angeschlossen. Die Membran ist mit dem zugehörigen Gehäuseteil 6 beispielsweise im Bereich der Trennebene der beiden Gehäuseteile 6, 7 verklebt, verschweißt od. dgl.. Zwischen der Gasdruckquelle 11 und der Druckmittelkammer 3 sind ein Steuer- 12 und ein Druckminderventil 13 angeordnet, mit denen die Gaszufuhr von der Gasdruckquelle 11 zur Druckmittelkammer 3 gesteuert bzw. geregelt und der Gasdruck auf einen voreinstellbaren maximalen Wert begrenzt werden kann. Da nach einem Gebrauch der erfindungsgemäßen Vorrichtung lediglich die Gasdruckquelle 11 und der Infusionsbeutel 2 gewechselt werden müssen und die übrige Vorrichtung wiederverwendet werden können soll, ist die Gasdruckquelle 11 über eine Steckkupplung 14 auswechselbar mit dem dem Gehäuse 1 zugeordneten Steuerventil 12 verbunden.Of the two detachably connected housing parts 6, 7, one housing part 6 interchangeably accommodates the pressure medium chamber 3 and the other housing part 7 the liquid-tight infusion bag 2. The housing part 6 with the pressure medium chamber 3 is sealed off from the housing part 7 receiving the infusion bag 2 by the membrane 5 and connected via a line 10 to an exchangeable gas pressure source 11. The membrane is glued, welded or the like to the associated housing part 6, for example in the region of the parting plane of the two housing parts 6, 7 the gas pressure source 11 and the pressure medium chamber 3, a control valve 12 and a pressure reducing valve 13 are arranged, with which the gas supply from the gas pressure source 11 to the pressure medium chamber 3 can be controlled and regulated and the gas pressure can be limited to a preset maximum value. Since after use of the device according to the invention only the gas pressure source 11 and the infusion bag 2 need to be changed and the rest of the device should be reusable, the gas pressure source 11 is connected to the control valve 12 assigned to the housing 1 via a plug-in coupling 14.
Die Gasdruckquelle 11 besteht aus einem Behältnis 15 mit einer hydrophoben, gasdurchlässigen Membran 16, die eine organische Säure 17, insbesondere Zitronensäure, in der benötigten Konzentration aufnimmt und mit einer von der Säure 17 über eine Folie 18 od. dgl. getrennten, zu einer Tablette 19 verpreßten Carbonatzubereitung, insbesondere aus Natriumcarbonat mit Bindemitteln.The gas pressure source 11 consists of a container 15 with a hydrophobic, gas-permeable membrane 16, which absorbs an organic acid 17, in particular citric acid, in the required concentration and with a tablet separated from the acid 17 via a film 18 or the like 19 pressed carbonate preparation, in particular from sodium carbonate with binders.
Zur Verwendung der erfindungsgemäßen Vorrichtung wird in das geöffnete Gehäuse 1 (siehe Fig. 3) ein Infusionsbeutel 2 eingelegt, dessen Infusionsschlauch 20 beispielsweise mit einer nicht dargestellten Klemme verschlossen wird und anschließend der die Druckmittelkammer 3 aufnehmende Gehäuseteil 6 mit dem den Infusionsbeutel 2 aufnehmenden Gehäuseteil 7 verriegelt. Hernach wird die Gasdruckquelle 11 dadurch aktiviert, daß die Tablette 19 durch ein Zerstören der Folie 18 mit der Säure 17 in Kontakt gebracht wird, wonach in Folge der stattfindenden chemischen Reaktion das Druckmittel, insbesondere Kohlendioxid, produziert wird. Die gasdurchlässige Membran 16 sorgt dafür, daß lediglich Gase in die Druckmittelkammer 3 gelangen und Flüssigkeiten im Behälter 15 zurückgehalten werden. Grundsätzlich ist die Gasdruckquelle 11 zur einmaligen Verwendung bestimmt, es können jedoch unter gewissen Umständen mehrere Infusionsbeutel in direkter Abfolge mit derselben Gasdruckquelle 11 infundiert werden. Dies ist abhängig vom Beutelvolumen und der Infusionsgeschwindigkeit. Nach dem Start der Reaktion in der Gasdruckquelle 11 wird das Gas aus dem Behälter 15 über das Steuerventil 12 in die Druckmittelkammer 3 eingeleitet, wo sich die Membran 5 an die flexible Wand 4 des Infusionsbeutels 2 anschmiegt und die im Infusionsbeutel 2 enthaltene Infusionsflüssigkeit mit dem gewünschten Druck zum Austreiben der Infusionsflüssigkeit aus dem Infusionsbeutel 2 durch den Infusionsschlauch 20 beaufschlagt. Nach Abschluß des Infusionsvorganges kann der Infusionsbeutel 2 aus dem geöffneten Gehäuse 1 entnommen und entsorgt sowie die Gasdruckquelle 11 vom Gehäuse 1 abgenommen werden, wonach die Membran 5 bei geöffnetem Steuerventil 12 in ihre Grundstellung zurückverlagert wird. Nach einem Einlegen eines neuen Infusionsbeutels 2 in das Gehäuse 1 und einem Anstecken einer neuen Gasdruckquelle ist die erfindungsgemäße Vorrichtung neuerlich betriebsbereit. To use the device according to the invention, an infusion bag 2 is inserted into the opened housing 1 (see FIG. 3), the infusion tube 20 of which is closed, for example, with a clamp (not shown) and then the housing part 6 receiving the pressure medium chamber 3 with the housing part 7 receiving the infusion bag 2 locked. The gas pressure source 11 is then activated in that the tablet 19 is brought into contact with the acid 17 by destroying the film 18, after which the pressure medium, in particular carbon dioxide, is produced as a result of the chemical reaction taking place. The gas-permeable membrane 16 ensures that only gases get into the pressure medium chamber 3 and liquids are retained in the container 15. Basically, the gas pressure source 11 is intended for single use, but under certain circumstances several infusion bags can be infused in direct succession with the same gas pressure source 11. This depends on the bag volume and the infusion speed. After the start of the reaction in the gas pressure source 11, the gas is introduced from the container 15 via the control valve 12 into the pressure medium chamber 3, where the membrane 5 is attached to the flexible wall 4 of the Infusion bag 2 nestles and the infusion liquid contained in the infusion bag 2 with the desired pressure to expel the infusion liquid from the infusion bag 2 through the infusion tube 20. After completion of the infusion process, the infusion bag 2 can be removed from the opened housing 1 and disposed of, and the gas pressure source 11 can be removed from the housing 1, after which the membrane 5 is moved back into its basic position when the control valve 12 is open. After inserting a new infusion bag 2 into the housing 1 and plugging in a new gas pressure source, the device according to the invention is ready for operation again.

Claims

P a t e n t a n s p r ü c h e : Patent claims:
1. Vorrichtung zur dosierten Abgabe einer Flüssigkeit, insbesondere einer Infusionsflüssigkeit, mit einem Gehäuse, das eine Flüssigkeitskammer und eine Druckmittelkammer aufweist, über die eine flexible Wand der Flüssigkeitskammer von außen mit Druckmittel beaufschlagbar ist, dadurch gekennzeichnet, daß das Gehäuse (1) aus zwei miteinander lösbar verbundenen Gehäuseteilen (6, 7) besteht, von denen der eine die Druckmittelkammer (3) enthält und der andere die als flüssigkeitsdichter Infusionsbeutel (2) ausgebildete Flüssigkeitskammer auswechselbar aufnimmt, und daß der Gehäuseteil (6) mit der Druckmittelkammer (3) gegenüber dem den Infusionsbeutel (2) aufnehmenden Gehäuseteil (7) durch eine Membran (5) abgedichtet und an eine Gasdruckquelle (11) angeschlossen ist.1. Device for the metered delivery of a liquid, in particular an infusion liquid, with a housing which has a liquid chamber and a pressure medium chamber, via which a flexible wall of the liquid chamber can be acted upon from the outside with pressure medium, characterized in that the housing (1) consists of two there are detachably connected housing parts (6, 7), one of which contains the pressure medium chamber (3) and the other interchangeably receives the liquid chamber designed as a liquid-tight infusion bag (2), and that the housing part (6) with the pressure medium chamber (3) opposite the housing part (7) receiving the infusion bag (2) is sealed by a membrane (5) and is connected to a gas pressure source (11).
2. Vorπchtung nach Anspruch 1 , dadurch gekennzeichnet, daß die Gasdruckquelle (11) über ein Steuer- (12) und/oder Druckminderventil (13) an die Druckmittelkammer (3) angeschlossen ist.2. Vorπchtung according to claim 1, characterized in that the gas pressure source (11) via a control (12) and / or pressure reducing valve (13) is connected to the pressure medium chamber (3).
3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Gasdruckquelle (11) auswechselbar mit dem dem Gehäuse (1) zugeordneten Steuer- (12) bzw. Druckminderventil (13) verbunden ist.3. Apparatus according to claim 1 or 2, characterized in that the gas pressure source (11) is interchangeably connected to the housing (1) associated control (12) or pressure reducing valve (13).
4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die beiden Gehäuseteile (6, 7) miteinander auf einer Seite gelenkig verbunden sind und auf der gegenüberliegenden Seite eine Verriegelungseinrichtung (9) aufweisen. 4. Device according to one of claims 1 to 3, characterized in that the two housing parts (6, 7) are hingedly connected to one another on one side and have a locking device (9) on the opposite side.
EP04737404A 2003-08-04 2004-08-03 Device for the dosed delivery of a fluid Withdrawn EP1651292A1 (en)

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AT0122403A AT413649B (en) 2003-08-04 2003-08-04 DEVICE FOR DOSED DISPENSING OF A LIQUID
PCT/AT2004/000274 WO2005011778A1 (en) 2003-08-04 2004-08-03 Device for the dosed delivery of a fluid

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AT413649B (en) 2006-04-15
CA2534379A1 (en) 2005-02-10
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US20060255063A1 (en) 2006-11-16
NZ544741A (en) 2008-10-31
JP2007501083A (en) 2007-01-25
KR20060057580A (en) 2006-05-26
US7753884B2 (en) 2010-07-13
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WO2005011778A1 (en) 2005-02-10
KR100886983B1 (en) 2009-03-04

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