Method of using a syringe plunger adapter

• US 8,986,251 B2
• Filed: 11/13/2007
• Issued: 03/24/2015
• Est. Priority Date: 11/22/2006
• Status: Expired due to Fees

• Current Assignee: Liebel-Flarsheim Company (Mallinckrodt plc)
• Original Assignee: Mallinckrodt LLC (Mallinckrodt plc)
• Inventors: Fago, Frank M.
• Primary Examiner(s): Sirmons, Kevin C
• Assistant Examiner(s): PATEL, PRITESH ASHOK
• Application Number:
  US12/296,142
• Publication Number:
  US 20090112087A1
• Time in Patent Office: 2,688 Days
• Field of Search: 604/131, 604/181, 604/500, 604/503, 604/507, 604/514
• US Class Current: 604/131
• CPC Class Codes: A61M 2005/14553 comprising a pressure jacket
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/14566 with a replaceable reservoir for receiving a piston rod of the pump
• CPC Class Codes: A61M 5/31515 Connection of piston with piston rod

Abstract

The invention relates to an adapter for a syringe plunger. The adapter of some embodiments may include a first side adapted to interface with a syringe plunger and an opposing a second side adapted to interface with a drive ram of a medical fluid injector. The adapter may include a peripheral side surface exhibiting a thickness and may include what may be characterized as at least one mating section adapted to engage with the syringe plunger. The mating section(s) may include a channel extending through the entire thickness of the adapter. In some embodiments, the mating section(s) may include a stop adjacent the channel that extends less than the entirety of the thickness of the adapter.

Claims

1. A method of operation for a medical fluid injector, the method comprising:

adapting a syringe plunger of a syringe so that the syringe may be utilized with a medical fluid injector, wherein the adapting comprises releasably interconnecting a plunger adapter and the syringe plunger, wherein the syringe plunger is disposed within a body of the syringe;

wherein the syringe plunger comprises a backer plate;

wherein the backer plate comprises a plurality of coupling mechanisms that are spaced from one another about a first longitudinal axis of the syringe plunger and that are disposed at a common location along this first longitudinal axis;

wherein the plunger adapter comprises a plurality of mating sections that are spaced from one another about a second longitudinal axis of the plunger adapter and that are disposed at a common location along this second longitudinal axis; and

wherein the releasably interconnecting comprises;

disposing the syringe plunger in a position where the backer plate of the syringe plunger projects toward the plunger adapter; and

rotating at least one of the syringe plunger and the plunger adapter relative to the other of the syringe plunger and plunger adapter after the disposing, wherein the rotating comprises causing each mating section of the plunger adapter to move into an engaged position with a corresponding coupling mechanism of the syringe plunger to connect the plunger adapter with the syringe plunger;

installing the syringe on the medical fluid injector after completion of the adapting;

contacting a drive ram engaging feature of the plunger adapter with a drive ram coupling mechanism of the medical fluid injector after the installing; and

moving the syringe plunger rearwardly while the plunger adapter and the syringe plunger remain releasably interconnected with one another, wherein the moving comprises pulling the plunger adapter rearward using a drive ram of the medical fluid injector and while the drive ram coupling mechanism remains in contact with the drive ram engaging feature of the plunger adapter.

2. The method of claim 1, wherein the disposing comprises aligning an alignment surface of a peripheral side surface of the plunger adapter with a protrusion on the backer plate of the syringe plunger, and wherein the rotating comprises distancing the alignment surface from the protrusion.

3. The method of claim 1, further comprising moving a peripheral tier of a peripheral side surface of the plunger adapter from a first position not engaged with a protrusion on the backer plate of the syringe plunger to a second position engaged with the protrusion during the rotating.

4. The method of claim 1, wherein the rotating comprises converging a stop on a peripheral side surface of the plunger adapter and a protrusion on the backer plate of the syringe plunger.

5. The method of claim 1, wherein the contacting a drive ram engaging feature is accomplished, at least in part, by moving at least one of the plunger adapter and the drive ram along a longitudinal axis of the drive ram.

6. The method of claim 1, wherein the moving comprises filling a syringe with medical fluid for use in a medical imaging procedure.

7. The method of claim 1, wherein the medical fluid comprises contrast media.

8. The method of claim 1, further comprising moving the syringe plunger forward while the plunger adapter and the syringe plunger remain releasably interconnected with one another, wherein moving the syringe plunger forward comprises pushing the plunger adapter forward using the drive ram of the medical fluid injector while the drive ram coupling mechanism remains in contact with the drive ram engaging feature of the plunger adapter.

9. The method of claim 8, wherein moving the syringe plunger forward comprises expelling medical fluid for use in a medical imaging procedure from the syringe.

10. The method of claim 9, wherein the medical fluid comprises contrast media.

11. A method of operation for a medical fluid injector, the method comprising:

adapting a syringe plunger for a syringe, the syringe plunger having a plurality of coupling mechanisms to be used with a medical fluid injector having a drive ram that does not include complimentary coupling mechanisms, wherein the adapting comprises releasably interconnecting a plunger adapter and the syringe plunger, wherein the syringe plunger is disposed within a barrel of the syringe;

wherein the syringe plunger comprises a backer plate;

wherein the backer plate comprises the plurality of coupling mechanisms and that are spaced from one another about a first longitudinal axis of the syringe plunger and that are disposed at a common location along this first longitudinal axis;

wherein the plunger adapter comprises a plurality of mating sections that are spaced from one another about a second longitudinal axis of the plunger adapter and that are disposed at a common location along this second longitudinal axis; and

wherein the releasably interconnecting comprises;

disposing the syringe plunger in a position where the backer plate of the syringe plunger projects toward the plunger adapter; and

rotating at least one of the syringe plunger and the plunger adapter relative to the other of the syringe plunger and plunger adapter after the disposing, wherein the rotating comprises causing each mating section of the plunger adapter to move into an engaged position with a corresponding coupling mechanism of the syringe plunger to connect the plunger adapter with the syringe plunger;

installing the syringe on the medical fluid injector after completion of the adapting; and

contacting a drive ram engaging feature of the plunger adapter with a drive ram coupling mechanism for a movable drive ram of a medical fluid injector after the installing.

12. The method of claim 11, wherein the contacting a drive ram engaging feature is accomplished, at least in part, by moving at least one of the plunger adapter and the drive ram along a longitudinal axis of the drive ram.

13. The method of claim 11, further comprising moving the syringe plunger within and relative to the barrel of the syringe while the plunger adapter and the syringe plunger remain releasably interconnected with one another.

14. The method of claim 13, wherein the moving comprises moving the syringe plunger rearwardly while the plunger adapter and the syringe plunger remain releasably interconnected with one another to draw medical fluid for use in a medical imaging procedure into the syringe.

15. The method of claim 14, wherein the medical fluid comprises contrast media.

16. The method of claim 13, wherein the moving comprises moving the syringe plunger forward while the plunger adapter and the syringe plunger remain releasably interconnected with one another.

17. The method of claim 16, wherein moving the syringe plunger forward comprises expelling medical fluid for use in a medical imaging procedure from the syringe.

18. The method of claim 17, wherein the medical fluid comprises contrast media.