Syringe interfaces and syringe adapters for use with medical injectors

• US 20040116893A1
• Filed: 07/16/2003
• Published: 06/17/2004
• Est. Priority Date: 01/18/2001
• Status: Active Grant

• Current Assignee: Bayer Healthcare LLC (Bayer AG), Tamakotomo Holdings Company LLC (Intellectual Ventures LLC)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Williams, Glen P, Berry, David H, Spohn, Michael A., Dedig, James Albert
• Granted Patent: US 7,273,477 B2
• Time in Patent Office: Days
• US Class Current: 604/500
• 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 5/1458 Means for capture of the plunger flange

Abstract

A syringe interface or adapter includes a first retaining member that pivots about an axis generally perpendicular to and offset from the axis of an injector piston when the syringe interface is attached to the injector. The first retaining member pivots in a rearward direction to engage a portion of the syringe flange. The syringe interface further includes a second retaining member slideably positioned within a passage in the syringe interface to slide in a direction generally perpendicular to the axis of the piston when the syringe interface is attached to the injector to engage a portion of the syringe flange. The first retaining member and the second retaining member preferably cooperate to engage the syringe flange around the entire perimeter of the syringe flange. The first retaining member is preferably biased toward an open position. The syringe interface can also include a rear portion having an attachment mechanism to attach the syringe interface to the injector.

Claims

1. A syringe interface for releasably attaching a syringe comprising a flange to an injector comprising a piston, the syringe interface comprising:

a housing defining a passage; and

a retaining member movably disposed within the passage, the retaining member operable to move in a direction generally perpendicular to an axis of the piston to engage at least a portion of the syringe flange.

2. The syringe interface of claim 1 wherein the housing further comprises a rear portion comprising an attachment mechanism, the attachment mechanism adapted to attach the syringe interface to the injector.

3. The syringe interface of claim 2 wherein the attachment mechanism comprises one or more mounting flanges.

4. The syringe interface of claim 3 wherein the attachment mechanism further comprises at least one extending projection.

5. The syringe interface of claim 1 wherein the housing further comprises one or more indicators operable to provide information about the syringe to the injector.

6. The syringe interface of claim 1, further comprising a second retaining member operably associated with the housing, the second retaining member operable to pivot about an axis generally perpendicular to and offset from the axis of the piston to engage a portion of the syringe flange.

7. The syringe interface of claim 6 wherein the second retaining member pivots in a rearward direction.

8. The syringe interface of claim 6 wherein the retaining member and the second retaining member cooperate to engage the syringe flange around the entire perimeter of the syringe flange.

9. The syringe interface of claim 6 wherein the second retaining member is biased toward an open position.

10. The syringe interface of claim 6, further comprising a contact member operably associated with the second retaining member, the contact member operable to cause the second retaining member to pivot about the axis generally perpendicular to and offset from the axis of the piston.

11. The syringe interface of claim 1 wherein the retaining member comprises a generally U-shaped abutment member operable to engage at least a portion of the syringe flange.

12. An injector comprising the syringe interface of any of claims 1-11.

13. A method of attaching a syringe comprising a flange to the syringe interface of any of claims 1-11, comprising:

inserting the syringe flange into the housing of the syringe interface; and

moving the retaining member in a direction generally perpendicular to an axis of an injector piston to engage at least a portion of the syringe flange.

14. The method of claim 13, further comprising:

pivoting the second retaining member about an axis generally perpendicular to and offset from the axis of the injector piston to engage a portion of the syringe flange.

15. The method of claim 13, further comprising:

rotating the syringe to attach a plunger of the syringe to the injector piston.

16. A syringe interface for releasably attaching a syringe comprising a flange to an injector comprising a piston, the syringe interface comprising:

a rear portion;

a forward portion that is rotatable relative to the rear portion; and

a carriage slideably connected to the syringe interface in a direction generally parallel to an axis of the piston, the carriage comprising a seating member adapted to engage the syringe flange.

17. The syringe interface of claim 16 wherein the rear portion comprises an attachment mechanism operable to attach the syringe interface to the injector.

18. A syringe interface for releasably attaching a syringe comprising a flange to an injector comprising a piston, the syringe interface comprising:

a rear portion;

a forward portion that is rotatable relative to the rear portion; and

a plurality of engagement members disposed around a passage in the syringe interface through which the piston passes, whereby rotation of the forward portion causes at least a portion of the engagement members to move radially inward to engage the syringe flange.

19. The syringe interface of claim 18 wherein the rear portion comprises an attachment mechanism operable to attach the adapter to the injector.

20. A syringe interface for releasably attaching a syringe comprising a flange to an injector comprising a piston, the syringe interface comprising:

a first retaining member slideably positioned within a first passage in the syringe interface to slide in a direction generally perpendicular to the axis of the piston; and

a second retaining member slideably positioned within a second passage in the syringe interface to slide in a direction generally perpendicular to the axis of the piston, the first retaining member generally opposing the second retaining member, the first retaining member and the second retaining member being adapted to engage the syringe flange and retain the syringe within the syringe interface.

21. The syringe interface of claim 20, further comprising a rear portion comprising an attachment mechanism operable to attach the adapter to the injector.

22. The syringe interface of claim 20 wherein the first retaining member and the second retaining member cooperate to engage the syringe flange around the entire perimeter of the syringe flange.

23. A syringe interface for releasably attaching a syringe comprising a flange to an injector comprising a piston, the syringe interface comprising:

a carriage slideably connected to the syringe interface in a direction generally parallel to the piston, the carriage comprising a seating member adapted to engage a portion of the syringe flange; and

a retaining member slideably positioned within a passage in the syringe interface to slide in a direction generally perpendicular to the axis of the piston, the carriage being slideable to a rearward position within the syringe interface at which the retaining member can be slid radially inward to engage another portion of the syringe flange and to retain the syringe within the syringe interface.

24. The syringe interface of claim 23, further comprising a rear portion comprising an attachment mechanism operable to attach the adapter to the injector.

25. The syringe interface of claim 23 wherein the carriage and the retaining member cooperate to engage the syringe flange around the entire perimeter of the syringe flange.

26. A syringe interface for releasably attaching a syringe comprising a flange to an injector comprising a piston, the syringe interface comprising:

a retaining member slideably positioned within a passage in the syringe interface to slide in a direction generally perpendicular to the axis of the piston to engage at least a portion of the syringe flange, the retaining member comprising a plurality of abutment members in which adjacent abutment members are movably attached to each other, the abutment members following a curved path when the retaining member is slid toward the axis of the piston to form an abutment with at least a portion of the syringe flange.

27. The syringe interface of claim 26, further comprising a rear portion comprising an attachment mechanism operable to attach the adapter to the injector.

28. The syringe interface of claim 26 wherein the retaining member comprises a first plurality of abutment members on one lateral side thereof and a second plurality of abutment members on a second lateral side thereof, adjacent abutment members of the first plurality of abutment member being movably attached to each other, adjacent abutment members of the second plurality of abutment members being movably attached to each other, each of the first plurality of abutment members and the second plurality of abutment members following a curved path when the retaining member is slid toward the axis of the piston to form an abutment with at least a portion of the syringe flange.

29. An injector comprising:

a mounting mechanism on a front of the injector;

a piston reciprocally movable through the mounting mechanism; and

an adapter operable to attach a syringe comprising a flange to the adapter, the adapter comprising;

a rear portion comprising an attachment mechanism adapted to attach the adapter to the mounting mechanism of the injector;

a first retaining member that pivots about an axis generally perpendicular to and offset from the axis of the piston when the adapter is attached to the injector, the first retaining member pivoting in a rearward direction to engage a portion of the syringe flange; and

a second retaining member slideably positioned within a passage in the adapter to slide in a direction generally perpendicular to the axis of the piston when the adapter is attached to the injector to engage a portion of the syringe flange.