Syringe adapter for front-loading medical injector

• US 5,520,653 A
• Filed: 09/01/1995
• Issued: 05/28/1996
• Est. Priority Date: 09/01/1995
• Status: Expired due to Term

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Reilly, David M., Havrilla, Joseph B.
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): VANOVER, PERRY
• Application Number:
  US08/522,777
• Time in Patent Office: 270 Days
• Field of Search: 604/151-155, 604/181, 604/187, 604/131, 604/134, 604/140, 604/143, 604/218, 604/228, 604/232, 128/655, 128/DIG. 1
• US Class Current: 604/152
• 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 5/14566 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
• CPC Class Codes: Y10S 128/01 Motorized syringe

Abstract

The adapters of the present invention are used for releasably attaching syringes of various types having a body, a plunger reciprocally mounted therein, and a flange near the rear end of the syringe body, to a front-loading injector head. In a preferred embodiment, the adapter includes a syringe carrier having a front end, a rear end, and syringe retaining channel located between the carrier front and rear ends for engaging at least a portion of the syringe flange; mounting flanges near the carrier rear end for releasably mounting the carrier in a desired position relative to the front wall of the injector head; a follower reciprocally mounted within the carrier having a front end engagable with the syringe plunger when the syringe is installed in the carrier; and a drive head opening communicating with a pair of drive head slots positioned proximate to the rear end of the follower for releasably mounting the follower in a desired position relative to the drive head of the injector head.

Claims

1. An adapter for releasably attaching a syringe to a front-loading injector head, wherein the syringe includes a body, and a plunger reciprocally mounted therein, and wherein the injector head includes a front wall, an opening formed therein, and a drive member having a drive head reciprocally mounted within the injector head and extendible through the opening, the adapter comprising:

a syringe carrier having a front end, a rear end, and syringe retaining means located between the carrier front end and rear end for engaging at least a portion of the syringe to retain the syringe within at least a portion of the carrier during an injection procedure;

first readily releasable mounting means positioned proximate to the carrier rear end for mounting the carrier in a desired position relative to the front wall of the injector head;

a follower reciprocally mounted within the carrier and including a front end and a rear end, the front end engagable with the syringe plunger when the syringe is installed in the carrier; and

second readily releasable mounting means positioned proximate to the rear end of the follower for mounting the follower in a desired position relative to the drive head.

2. The adapter of claim 1 wherein

the syringe retaining means is positioned proximate to the carrier front end.

3. The adapter of claim 1 wherein

the syringe retaining means is positioned proximate to the carrier rear end.

4. The adapter of claim 1 wherein

the syringe retaining means includes a channel for receiving at least a portion of a flange disposed proximate to a rear end of the syringe body.

5. The adapter of claim 1 wherein the carrier further comprises:

a front retaining wall positioned proximate to the carrier front end for engaging at least a portion of a front tapered section of the syringe.

6. The adapter of claim 1 wherein

the first readily releasable mounting means is engagable with a first readily releasable receiving means positioned proximate the injector head opening to form a first interlocking mechanism which is activated and released upon rotation of the carrier relative to the front wall of the injector head.

7. The adapter of claim 1 wherein

the first readily releasable mounting means includes at least one mounting flange extending radially outward proximate to the rear end of the carrier, the mounting flange releasably engagable with at least one receiving flange extending radially inward proximate to the opening in the front wall of the injector head upon rotation of the carrier relative to the front wall of the injector head.

8. The adapter of claim 7 wherein

the mounting flange includes indication means for providing information identifying at least one of the syringe and adapter loaded onto the injector head.

9. The adapter of claim 1 wherein

the follower includes means for releasably receiving at least a portion of a plunger extension extending from a rear end of the plunger.

10. The adapter of claim 9 wherein

the plunger extension includes a plunger rod attached at a first end to the plunger and having a flange disposed proximate to a second end of the plunger rod;

and

the means for releasably receiving at least a portion of the plunger extension includes means for releasably receiving at least a portion of the plunger rod flange.

11. The adapter of claim 10 wherein

the means for releasably receiving at least a portion of the plunger rod flange includes a channel formed proximate to the front end of the follower.

12. The adapter of claim 9 wherein

the plunger extension includes a stem attached at a first end to the plunger and knob attached to a second end of the stem;

and

the means for releasably receiving at least a portion of the plunger extension includes means for releasably receiving at least a portion of the stem and knob.

13. The adapter of claim 12 wherein

the means for releasably receiving at least a portion of the stem and knob includes a channel formed proximate to the front end of the follower, the channel radially extending from an edge of the follower to a center of the follower.

14. The adapter of claim 1 wherein

the second readily releasable mounting means is engagable with the injector drive head to form a second interlocking mechanism which is activated and released upon rotation of the carrier relative to the front wall of the injector head.

15. The adapter of claim 1 wherein

the second readily releasable mounting means includes a drive head opening and a pair of drive head slots communicating therewith, the drive head opening and drive head slots releasably engagable with the drive head upon rotation of the carrier relative to the front wall of the injector head.

16. A syringe system for use with a front-loading injector head wherein the injector head includes a front wall and an opening formed therein, and a drive member having a drive head reciprocally mounted within the injector head and extendible through the opening, the system comprising:

a syringe including a body, and a plunger reciprocally mounted therein; and

an adapter for receiving the syringe and including

a carrier having a front end, a rear end, and syringe retaining means located between the carrier front and rear ends for engaging at least a portion of the syringe to retain the syringe within the carrier during an injection procedure;

first readily releasable mounting means positioned proximate to the carrier rear end for mounting the carrier in a desired position relative to the front wall of the injector housing;

a follower reciprocally mounted within the carrier and including a front end and a rear end, the front end engagable with the syringe plunger when the syringe is installed in the carrier; and

second readily releasable mounting means positioned proximate to the rear end of the follower for mounting the follower in a desired position relative to the drive head.

17. The syringe system of claim 16 wherein

the first readily releasable mounting means is engagable with a first readily releasable receiving means positioned proximate the injector head opening to form a first interlocking mechanism which is activated and released upon rotation of the carrier relative to the front wall of the injector head.

18. The syringe system of claim 16 wherein

the follower includes means for releasably receiving at least a portion of a plunger extension extending from a rear end of the plunger.

19. The syringe system of claim 18 wherein

the means for releasably receiving at least a portion of the plunger extension includes a channel formed proximate to the front end of the follower.

20. The syringe system of claim 16 wherein

the second readily releasable mounting means is engagable with the injector drive head to form a second interlocking mechanism which is activated and released upon rotation of the carrier relative to the front wall of the injector head.