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
  • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
  • A61M5/14526—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons the piston being actuated 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
  • 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
  • A61M2005/14506—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons mechanically driven, e.g. spring or clockwork
• • 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
  • A61M2005/14513—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons with secondary fluid driving or regulating the infusion
• • 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
  • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
  • A61M5/14566—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir for receiving a piston rod of the pump

Definitions

• the invention relates to a device for administering a fluid product, in particular to a device for the administration of a fluid product with a continuous delivery rate.
• a drive unit is combined with a conventional syringe.
• the syringe has a product container receiving the fluid product and a drive piston rod through which a product plug within the product container can be advanced. By means of an outlet opposite the product plug, the fluid product can be released from the syringe.
• the syringe also has a valve for regulating the fluid flow.
• the drive unit includes a liquid medium chamber, a second chamber that communicates with the first chamber, a piston, and a valve system. A force can be exerted on the piston by means of a spring, whereby the liquid medium is conducted from the first chamber into the second chamber and back.
• the valve system controls the movement of the piston in the forward or reverse direction and thus the discharge of the fluid product from the syringe.
• the known systems for administering fluid medicaments are generally intended for recycling. They therefore have a complex structure with a large number of components and are therefore expensive to produce. Furthermore, the change of the delivery device from an empty product container to a new filled product container must be controlled by the patient or an assistant. If handled incorrectly, it is possible, for example, to administer a defective dose to a patient.
• an object of the invention to provide an administering device for continuously administering a fluid medicament suitable for single use.
• An administering device is intended for a fluid product, primarily for a therapeutic drug such as insulin. However, it can also be used for other fluid products to be applied to a body tissue.
• the delivery device comprises a product container receiving the product to be dispensed and having an opening for dispensing the product from the product container at its forward distal end and a product plug at its rear proximal end.
• the product container used is preferably an ordinary ampoule, as used, for example, for hypodermic syringes or pens for rapid doses of small doses or injection shots.
• the product plug is movable relative to the product container and closes off the proximal end of the container in a fluid-tight manner.
• the administration device comprises a fluid reservoir for a drive fluid and a drive means, which acts on the fluid reservoir.
• the drive fluid is preferably an incompressible fluid.
• At least one of the fluid reservoir and the product container should be an incompressible chamber, more preferably the fluid reservoir and the product container are each formed by an incompressible chamber, for which they preferably have solid stable walls in a suitable geometric shape.
• the fluid reservoir has a drive plug, by which transmit the action of the drive means to the drive fluid within the fluid reservoir and the fluid reservoir is pressurized.
• drive means various known systems can also be used, such as mechanical springs, hydraulic drives or gas drives.
• a mechanical spring for example a mechanical compression spring, is preferably used as the drive means.
• the product plug of the product container is followed by a pressure chamber.
• the pressure chamber can be formed, for example, by one or more walls of the product container, the product plug and a closure of the container. The conclusion may in particular form a housing, preferably additionally by means of a seal.
• the pressure chamber can therefore be arranged, for example, at least partially, but preferably completely, within the product container.
• the product container is thus subdivided by the product plug into a chamber for the product and the pressure chamber.
• a fluid connection is provided between the fluid reservoir and the pressure chamber. Due to the fluid connection, the drive fluid can be conducted from the fluid reservoir into the pressure chamber.
• the drive means acts on the fluid reservoir so that the pressure chamber is pressurized via the fluid connection, which acts on the product plug and thus the product is discharged from the product container.
• a housing of the device forms a compartment for a product container received or receivable therein, a housing accommodating one or more or all of the components of the administering device may alternatively but directly form the product container itself.
• the fluid communication has a first state, a rest state, in which it is closed, i. in which no drive fluid can flow from the fluid reservoir into the pressure chamber.
• a connecting means is provided for bringing the fluid connection from the first closed resting state to a second opened state, an administration state, in which the fluid connection for the driving fluid is permeable.
• the connecting means therefore serves to connect the fluid reservoir, which contains the drive fluid, with the pressure chamber, which adjoins the product plug of the product container. Now acts in the second open state, the drive means on the fluid reservoir, or on the drive plug of the fluid reservoir, the drive fluid is passed through the fluid connection.
• the drive means is already biased in the administration device in the resting state. That is, the drive means acts constantly on the fluid reservoir, or the drive plug.
• the drive means is held by a holding or securing device, in the prestressed position.
• the holding device may be given by known locking systems, in which z. B. the drive plug of the drive fluid is held by a movable stop. The stop can z. B. be removed by a push button or slide.
• the holding device is formed by the closure of the fluid connection, for example by means of the closure membrane.
• the bias of the drive means can then be released by opening the fluid connection. In principle, however, it is also possible to tension the drive means only during or after opening the fluid connection.
• a housing which receives both the product container, the fluid reservoir, the pressure chamber and the fluid connection. It is advantageous if the housing with the fluid reservoir, the pressure chamber and the fluid connection forms a preassembled unit and the housing has a compartment into which the product container can be used if necessary, for example shortly before the required administration. In order to use the administration device according to the invention, it is then only necessary to insert the product container into the housing compartment. Particularly preferably, when inserting the product container into the housing, the connection means is actuated such that the fluid connection is brought from the idle state into the administration state.
• the drive means can be triggered with the aid of the product container and, as a result, the pressure chamber can be subjected to pressure.
• the compressive force begins to act on the drive plug such that the plug is displaced from the fluid reservoir and drive fluid flows from the fluid reservoir into the pressure chamber.
• a pressure is built up in the pressure chamber, which acts on the product plug and thus the fluid product is released through the opening in the product container.
• the fluid connection for closing comprises a closure membrane.
• the connecting means By piercing the sealing membrane, the fluid connection can be brought from the closed to the opened state.
• the connecting means then has a flow-through flow cross-section, preferably a tubular hollow element, for. B. a hollow needle with which the sealing membrane of the fluid communication pierced, preferably pierced, can.
• the connection means may form part of the fluid connection.
• the fluid connection is formed on the one hand by a narrow capillary, which flows out of the fluid reservoir, is directed inside the housing in the direction of the product container compartment and closed with the closure membrane at the end which opens into the compartment is, and on the other hand from the hollow needle of the connecting element is formed.
• the pressure in the pressure chamber can be determined by the dimensioning of the fluid connection.
• the pressure in the pressure chamber depends on the passage area or the diameter, the fluid connection and the length of the capillary. He is independent of the pressure of the drive element on the fluid reservoir, or the drive plug.
• the fluid connection has a diameter of 0.5 to 3 mm.
• the capillary within the housing meandering or labyrinthine, z. B. in loops, to arrange. Thereby, the Kapillarweg between fluid space and pressure chamber can be extended and the pressure in the pressure chamber can be regulated by selecting a specific capillary length.
• the connecting means forms in a preferred first embodiment in the state in which the fluid reservoir is connected to the product reservoir, only a portion of the fluid connection.
• only the connecting means in the connected state forms the fluid connection.
• said hollow element piercing through the closure membrane can form the fluid connection alone.
• Said closure membrane can form a wall of the fluid reservoir in the second embodiment.
• the administering device of the present invention is preferably intended for single use.
• a user inserts the product container into the housing with the remaining device components, whereby in preferred embodiments the pressure chamber is connected to the fluid reservoir.
• the administration is triggered by the insertion at the same time. No further manipulations are required to start the device or to control the amount of administration. After completion of the administration, i. as soon as the product container is emptied, the connection to the patient can be interrupted and the entire administration device can be disposed of.
• the administering device it is also possible to make the administering device reusable. If, for example, the drive means is tensioned or charged only during or after or after insertion of the product container, the administration device can be repeatedly charged and used by reinserting a product container. Also, the drive means may be biased prior to insertion of a new product container.
• the connecting means is actuated upon insertion of the product container into the housing from the product stopper. As described, thereby the fluid connection can be brought from a closed state to an open state. At the same time it is also possible to form the connecting means such that the product plug is displaced within the product container during insertion of the container into the housing in the distal direction of the product container.
• the connecting means pushes the product plug by a distance that allows venting of the product container. For this, only a small movement of the product plug inside the product container is necessary. Possible air pockets within the product container are thereby removed through the front opening of the product container and the delivery device may be connected directly to an administration line leading to the patient.
• the frictional force to overcome the snug fit of the product plug in the product container is greater than the force necessary to bring the fluid connection from the closed to the open state, ie to puncture the closure membrane.
• the membrane is then first pierced and thus the fluid connection between the fluid reservoir and the pressure chamber is opened and then the product plug is displaced distally by a venting distance. Due to the pressure building up in the pressure chamber, the feed of the product plug begins immediately and thus the product administration.
• a method is claimed, according to which in a device for administering a fluid product, preferably a continuous administration, the administration and / or a venting process for venting a product container is triggered by the insertion of a product container.
• Figure 1 A firstShsfoim of a delivery device according to the present invention in a resting state
• FIG. 2 shows the administration device according to FIG. 1 in an administration state
• FIG. 3 The delivery device during administration
• FIG. 4 shows a second embodiment of an administration device according to the present invention.
• FIG. 1 shows a first embodiment of an administration device according to the present invention.
• the administering device comprises a housing (1) in which a product container in the form of an ampoule (2), a fluid reservoir (3), a drive means in the form of a spring (4), a fluid connection (5) and a connecting means (6) housed are.
• the driving fluid used is preferably water whose physical parameters are well known. In principle, however, it is also possible to use other fluids which differ, for example, in viscosity.
• the ampoule (2) is filled with the fluid product (7). It has at its front distal end an opening (8) and at its rear proximal end a product plug (9). In Figure 1, the ampoule (2) is not yet fully inserted into the housing (1) and the administering device is in the resting state.
• the ampoule (2) and the fluid reservoir (3) with the spring (4) are arranged next to each other in parallel offset within the housing.
• the fluid connection (5) forms a cross-connection within the housing (1). By this arrangement, the overall length of the administering device can be kept small.
• the fluid connection (5) is laid in several loops over the surface of the housing (1) (not visible in the figure).
• the connecting means (6) is provided within the housing (1) as a movable element.
• the connecting means (6) is movable along the longitudinal axis of the ampoule. It is arranged between the ampoule (2) and the fluid connection (5) and has a hollow needle (10).
• the fluid connection (5) is permanently connected at one end to the fluid reservoir (3) and is closed at the other end by a sealing membrane.
• the hollow needle (10) of the connecting element (6) is arranged with respect to the sealing membrane with axially small distance.
• the connecting means (6) is advantageously provided centrally opposite the product plug (9).
• the system of the spring (4), the fluid reservoir (3), the fluid connection (5) and the closure membrane forms a closed fluid system at rest.
• the spring (4) is already in the pretensioned state within the system. It therefore exerts a pressure on the fluid reservoir with the drive fluid even when at rest.
• the sealing membrane is therefore designed such that it can withstand this pressure.
• the ampoule (2) is fully inserted into the housing (1) of the administering device.
• the product plug (9) comes to lie on the connecting means (6).
• the product plug (9) first pushes the connecting element (6) in the direction of the closure membrane until the hollow needle (10) pierces the membrane and abuts the connecting element (6) on a displacement stop.
• the sliding stop can be formed by the housing.
• the connecting means (6) can not move further in the direction of the longitudinal axis of the ampoule relative to the housing.
• the ampoule (2) can be inserted even further in the direction of insertion into the housing (1), while the product plug (9) which bears against the connecting means (6) is displaced relative to the wall of the ampoule (2).
• the product plug (9) which bears against the connecting means (6) is displaced relative to the wall of the ampoule (2).
• the volume within the ampoule (2) for the fluid product (7) is reduced and there is a vent, or a small release of the fluid product from the ampoule (2) through the opening (8 ) instead of.
• a small displacement of a few millimeters is sufficient.
• the ampoule (2) is as far into the housing (1) pushed in until it also abuts a displacement stop within the housing.
• the ampoule (2) pushes the circumference of its proximal end against a seal (11).
• To secure the ampoule (2) within the housing (1) can advantageously be provided a locking or locking.
• the administering device is now in an administration state in which there is a fluid connection (5) through the piercing of the closure membrane in the open state.
• the administering device is shown in the administration state after the administration of a certain amount of product.
• the pressure chamber (12) is visible, which is formed by the wall of the ampoule (2), the product plug (9), the connecting means (6) and the seal (11). Since the spring (4) is already preloaded inside the housing, by opening the fluid connection (5), the drive fluid from the fluid reservoir (3) flows through the fluid connection (5) through the hollow needle (10) into the pressure chamber (12). The flow rate through the fluid connection (5) depends on the diameter and the length of the fluid connection (5). The pressure exerted on the product plug (9) is therefore independent of variants of the pressure of the drive element, i. the spring (4). By choosing the diameter and the length of the fluid connection (5), the delivery rate of the administering device can be determined, which then remains the same throughout the administration of the fluid product (7) from the ampoule (2).
• the vial is completely deflated and the delivery device may be discarded.
• Figure 4 shows a further embodiment of the present invention, wherein within the housing (1) the ampoule (2), the fluid reservoir (3) and the drive spring (4) are arranged along the same axis.
• the administering device has a narrow elongated shape. The operation corresponds to the function of the embodiment of Figures 1-3.
• the connecting means (6) already alone, namely the hollow needle (10), the entire fluid connection (5) between the fluid reservoir (3) and the pressure chamber at the proximal side of the product plug (9).

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• Health & Medical Sciences (AREA)
• Hematology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Vascular Medicine (AREA)
• Engineering & Computer Science (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Fluid Mechanics (AREA)
• Physics & Mathematics (AREA)
• Heart & Thoracic Surgery (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)
• Medical Preparation Storing Or Oral Administration Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=35427285

Family Applications (1)

Country Status (7)

Families Citing this family (28)

Family Cites Families (10)

• 2005
  • 2005-04-25 CH CH00724/05A patent/CH699723B1/de not_active IP Right Cessation
• 2006
  • 2006-04-24 AU AU2006239707A patent/AU2006239707B9/en not_active Ceased
  • 2006-04-24 JP JP2008506902A patent/JP4660589B2/ja not_active Expired - Fee Related
  • 2006-04-24 WO PCT/CH2006/000221 patent/WO2006114012A1/de not_active Application Discontinuation
  • 2006-04-24 EP EP06721923A patent/EP1890744A1/de not_active Withdrawn
  • 2006-04-24 CN CN2006800137845A patent/CN101287510B/zh not_active Expired - Fee Related
• 2007
  • 2007-10-24 US US11/923,339 patent/US7789858B2/en not_active Expired - Fee Related
• 2010
  • 2010-07-29 US US12/846,103 patent/US8277413B2/en not_active Expired - Fee Related
• 2012
  • 2012-08-15 US US13/585,999 patent/US20120310208A1/en not_active Abandoned

Non-Patent Citations (1)

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