Single-head power injector with contrast media leakage management

• US 10,342,916 B2
• Filed: 03/02/2016
• Issued: 07/09/2019
• Est. Priority Date: 03/03/2015
• Status: Active Grant

• Current Assignee: Liebel-Flarsheim Company (Mallinckrodt plc)
• Original Assignee: Liebel-Flarsheim Company (Mallinckrodt plc)
• Inventors: Small, James R., McGraw, Robert J.
• Primary Examiner(s): Farrar, Lauren P
• Application Number:
  US15/551,558
• Publication Number:
  US 20180021505A1
• Time in Patent Office: 1,224 Days
• CPC Class Codes: A61M 2005/14553 comprising a pressure jacket
• CPC Class Codes: A61M 2005/3101 Leak prevention means for proximal end of syringes, i.e. syringe end opposite to needle mounting end
• CPC Class Codes: A61M 2005/3125 specific display means, e.g. to indicate dose setting
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/31 Details

Abstract

A power injector (200) is disclosed that includes a number of features to address leakage of contrast media from a syringe that may occur while operating the power injector (200), for instance when loading fluid into a syringe after being installed on a powerhead (210) of the injector (200) and/or when purging air from such a syringe. One or more drainage channels (240) may be incorporated on a faceplate mounting (234) which in turn receives a faceplate (310), which in turn receives a syringe. A cover assembly (260) may utilize a form-in-place gasket (274) between its top cover (262) and its bottom cover (290). A bezel (330) includes an overlay (334) that is disposed over a touch screen display (380) that is aligned with a display aperture (264) through the top cover (262), and the bezel (330) may include a gasket (350) to seal against the top cover (262).

Claims

1. A power injector comprising:

a first drive source;

a powerhead comprising a drive ram that is interconnected with said first drive source and that is movable along a reference axis in at least a first direction through operation of at least said first drive source, wherein said powerhead further comprises a front plate, and wherein said front plate comprises a ram aperture, aligned with said drive ram, and at least one drainage channel;

a syringe mount installed on said powerhead; and

a flowpath that extends from said ram aperture to an exterior of said power injector when a syringe is interconnected with said syringe mount, wherein said flowpath comprises said at least one drainage channel and with said at least one drainage channel extending to said exterior of said power injector.

2. The power injector of claim 1, wherein said at least one drainage channel comprises a first drainage channel with first and second ends that are spaced along a length dimension of said first drainage channel and with said length dimension corresponding with a direction of flow along said first drainage channel, wherein said first end of said first drainage channel is positioned closer to said reference axis than said second end of said first drainage channel, and wherein said second end of said first drainage channel is disposed at a lower elevation than said first end of said drainage channel when said reference axis is disposed in a horizontal orientation.

3. The power injector of claim 1, wherein said front plate comprises a face that is spaced from an end of said ram aperture along said reference axis, wherein said ram aperture and said face project in a common direction, and wherein said at least one drainage channel is formed on said face.

4. The power injector of claim 3, wherein said face comprises a first groove, wherein said at least one drainage channel comprises said first groove.

5. The power injector of claim 3, wherein said face is disposed within a plane that is at least generally perpendicular to said reference axis.

6. The power injector of claim 1, wherein said front plate further comprises a first surface and a front face, wherein said first surface and said front face are disposed in different orientations, wherein said first surface is disposed in proximity to said ram aperture and defines one portion of said flowpath, and wherein each said drainage channel is formed on said front face and defines a different portion of said flowpath.

7. The power injector of claim 6, wherein said first surface is arcuate.

8. The power injector of claim 6, wherein said first surface is disposed at least generally parallel with said reference axis along which said drive ram moves, and wherein said front face is disposed within a plane that is at least generally perpendicular to said reference axis.

9. The power injector of claim 6, wherein said first surface is positioned along only a portion of a perimeter of said ram aperture.

10. The power injector of claim 1, wherein each said drainage channel is an open, concave structure.

11. The power injector of claim 1, wherein each said drainage channel projects away from said powerhead.

12. The power injector of claim 1, wherein each said drainage channel projects in a direction in which said drive ram moves for a fluid discharge operation.

13. The power injector of claim 1, wherein said at least one drainage channel comprises first and second drainage channels.

14. The power injector of claim 13, wherein said first and second drainage channels are oriented as the mirror image of one another.

15. The power injector of claim 13, wherein said first and second drainage channels diverge away from one another proceeding away from both said reference axis and said ram aperture.

16. The power injector of claim 1, further comprising a cover assembly, wherein said cover assembly comprises a top cover detachably connected with a bottom cover, wherein said top cover comprises a form-in-place gasket that is anchored to said top cover and that seals against said bottom cover.

17. The power injector of claim 16, wherein said form-in-place gasket is adhered to said top cover.

18. The power injector of claim 16, wherein said form-in-place gasket engages said bottom cover throughout an entirety of an interface between said top cover and said bottom cover.

19. The power injector of claim 16, wherein said top cover comprises a lower end that defines a lower perimeter of said top cover, and wherein said form-in-place gasket is recessed relative to said lower end and is located within an interior of said top cover.

20. The power injector of claim 19, wherein an overlap exists between said top cover and said bottom cover, and wherein said form-in-place gasket is disposed within an entirety of said overlap.

21. The power injector of claim 16, wherein said cover assembly comprises a rear wall, an aperture extending through said rear wall, and an annular rim that protrudes from said rear wall and that is disposed about the entire circumference of said aperture.

22. The power injector of claim 21, further comprising:

a knob that is aligned with said aperture through said rear wall of said cover assembly and that is interconnected with said drive ram for manual movement of said drive ram through manual rotation of said knob.

23. The power injector of claim 21, wherein said annular rim protrudes at least about 0.125 inches beyond said rear wall.

24. The power injector of claim 16, wherein said powerhead further comprises:

a touch screen display; and

a bezel comprising an overlay disposed over said touch screen display, and a bezel gasket disposed about a perimeter of said bezel, wherein said top cover engages said bezel gasket.

25. The power injector of claim 24, further comprising:

a printed circuit board; and

a display mounting bracket maintained in a fixed position relative to said printed circuit board, wherein said bezel detachably engages at least one of said display mounting bracket or said touch screen display.

26. The power injector of claim 1, wherein said front plate further comprises a base surface and a protrusion that extends from said base surface, wherein said ram aperture intersects with and terminates at said base surface, wherein said protrusion comprises a front face that is spaced from said base surface in a dimension corresponding with said reference axis, wherein said protrusion further comprises a first surface that is disposed at a lower extreme of said ram aperture when said reference axis is in a horizontal orientation and that extends from said base surface to said front face, and wherein said at least one drainage channel is formed on said front face and intersects said first surface.

27. The power injector of claim 1, wherein when said reference axis is horizontally disposed and with a horizontal reference plane extending through said reference axis:

1) one part of said ram aperture is positioned above said horizontal reference plane and another part of said ram aperture is positioned below said horizontal reference plane; and

     2) an entirety of each drainage channel, of said at least one drainage channel, is disposed below said reference plane.

28. A power injector comprising:

a first drive source;

a powerhead comprising a drive ram that is interconnected with said first drive source and that is movable along a reference axis in at least a first direction through operation of at least said first drive source, wherein said powerhead further comprises a front plate, wherein said front plate comprises a ram aperture, aligned with said drive ram, and at least one drainage channel, wherein said front plate further comprises a faceplate mounting, and wherein said at least one drainage channel is formed on said faceplate mounting; and

a syringe mount installed on said powerhead, wherein said syringe mount comprises a faceplate, wherein said faceplate detachably mounted to said faceplate mounting.

29. The power injector of claim 28, wherein said faceplate further comprises a syringe aperture aligned with said ram aperture, wherein a syringe is disposable within said syringe aperture, and wherein a syringe body of the syringe is maintainable in a fixed position relative to each of said faceplate and said powerhead.

30. The power injector of claim 28, wherein each said drainage channel is located between said front plate and said faceplate.