MEDICAL LIQUID INJECTION DEVICE

• US 20110054397A1
• Filed: 03/17/2007
• Published: 03/03/2011
• Est. Priority Date: 03/31/2006
• Status: Active Grant

• Current Assignee: Debiotech S.A.
• Original Assignee: Debiotech S.A.
• Inventors: Menot, Sébastien, Schneeberger, Niklaus, Neftel, Frédéric
• Granted Patent: US 8,298,183 B2
• Time in Patent Office: Days
• US Class Current: 604/110
• CPC Class Codes: A61M 2005/14264 with means for compensating influence from the environment
• CPC Class Codes: A61M 2005/14268 with a reusable and a disposable component
• CPC Class Codes: A61M 2205/0244 Micromachined materials, e.g. made from silicon wafers, microelectromechanical systems [MEMS] or comprising nanotechnology
• CPC Class Codes: A61M 5/14224 Diaphragm type
• CPC Class Codes: A61M 5/16854 by monitoring line pressure

Abstract

Medical liquid injection device comprising the following distinct elements: a container (1), an outlet channel (14) and a pumping unit (5); said container (1) comprising a rigid wall on which said pumping unit (5) is rigidly fixed; said rigid wall furthermore including a passage (4) which forms a direct fluid connection between said pumping unit (5) and said container (1); said outlet channel (14) being directly connected to said pumping unit (5) in such a way that a fluid initially kept in said container (1) may first flow through said pumping unit (5) and then reach said outlet channel (14), said medical liquid injection device furthermore comprising an inlet (16), distinct from said outlet channel (14), and disposable elements.

Claims

1. Medical liquid injection device comprising the following distinct elements:

a container, an outlet channel and a pumping unit;

said container comprising a rigid wall on which said pumping unit is rigidly fixed;

said rigid wall furthermore including a passage which forms a direct fluid connection between said pumping unit and said container, said outlet channel being directly connected to said pumping unit in such a way that a fluid initially kept in said container may first flow through said pumping unit and then reach said outlet channel, said medical liquid injection device furthermore comprising an inlet, distinct from said outlet channel, and disposable elements.

2. Medical liquid injection device according to claim 1 wherein said inlet is adapted to act as refilling means.

3. Medical liquid injection device according to claim 1 furthermore comprising a connector and an infusion line that can be connected and disconnected from said outlet channel.

4. Medical liquid injection device according to claim 3 wherein said inlet is in close vicinity to the outlet channel and the connector of the infusion line is formed such that it blocks the access to the inlet while connected.

5. Medical liquid injection device according to claim 1 furthermore comprising non-disposable elements.

6. Medical liquid injection device according to claim 1 characterized by the fact that it is designed to have a pre-determined usage period which is not longer than the labeled life time of use of a drug present in said container.

7. Medical liquid injection device according to claim 6 comprising usage preventing means which are adapted to prevent the usage of the device after said pre-determined usage period.

8. Medical liquid injection device according to claim 5 wherein the non-disposable elements comprise electronic control parts.

9. Medical liquid injection device according to claim 8 wherein said electronic control parts are adapted to prevent usage of the device after a pre-determined period.

10. Medical liquid injection device according to claim 9 wherein said electronic control parts are adapted to recognize the identity of the disposable parts in order to prevent reuse after said pre-determined period.

11. Medical liquid injection device according to claim 9 wherein said electronic control parts are adapted to determine if said disposable parts have been used previously.

12. Medical liquid injection device according to claim 1 wherein said container has a variable volume.

13. Medical liquid injection device according to claim 12 wherein said container comprises a movable wall, for instance a flexible wall.

14. Medical liquid injection device according to claim 12 comprising a control element that prevents injection into a user when the container is pressurized.

15. Medical liquid injection device according to claim 14 wherein said control element is a three ports valve connected to said pumping unit, to said outlet and communicating with said container.

16. Medical liquid injection device according to claim 15 wherein said three ports valve is adapted to open only when the pressure on the port connected on the pumping unit is higher than the pressure in or around the container.

17. Medical liquid injection device according to claim 1 furthermore comprising a pressure sensor.

18. Medical liquid injection device according to claim 17 wherein said pressure sensor is adapted to measure the liquid pressure inside said container.

19. Medical liquid injection device according to claim 18 comprising display means which are adapted to communicate the container filling level to user, said filling level being obtained from said pressure sensor.

20. Medical liquid injection device according to claim 18 comprising first alarm means to alert a user in case of excessive filling, said first alarm means being connected to said pressure sensor.

21. Medical liquid injection device according to claim 18 comprising second alarm means for detecting potentially dangerous states of reservoir pressure, said second alarm means being connected to said pressure sensor.

22. Medical liquid injection device according to claim 18 comprising third alarm means for detecting when the container is empty, said third alarm means being connected to said pressure sensor.

23. Medical liquid injection device according to claim 12 wherein said container is fabricated as a rigid shell having a concave surface forming a cavity and a flexible membrane covering the cavity.

24. Medical liquid injection device according to claim 23 wherein said rigid shell comprises a channel that connects the interior of said container with the external environment.

25. Medical liquid injection device according to claim 23 wherein said rigid shell comprises several channels.

26. Medical liquid injection device according to claim 23 wherein said flexible membrane is formed to conform to the cavity to allow the container to be emptied without substantial under pressure.

27. Medical liquid injection device according to claim 23 comprising an inlet wherein said inlet and said outlet are disposed in said rigid shell.

28. Medical liquid injection device according to claim 23 wherein said flexible membrane is covered with a concave cover shell.

29. Medical liquid injection device according to claim 28 wherein said concave cover shell is rigid and thereby limits the container filling volume.

30. Medical liquid injection device according to claim 23 wherein the shape of the cavity in the covering shell is the mirror image of the cavity in the container such that the membrane also conforms to the cover shell in the full state.

31. Medical liquid injection device according to claim 28 adapted in a way so that the volume between the flexible membrane and the cover shell is ventilated for pressure equilibration when the container volume varies.

32. Medical liquid injection device according to claim 28 wherein the cover shell is reinforced to protect said flexible membrane from mechanical pressures.

33. Medical liquid injection device according to claim 32 wherein said flexible membrane contains a weak zone that breaks in case of dangerous over pressures.

34. Medical liquid injection device according to claim 29 comprising limiting means situated between said flexible membrane and said cover shell for reducing the filling volume.

35. Medical liquid injection device according to claim 34 wherein the position of said limiting means is adjustable in order to vary the volume reduction.