Syringe, injector and injector system

• US 6,048,334 A
• Filed: 02/20/1998
• Issued: 04/11/2000
• Est. Priority Date: 10/18/1996
• Status: Expired due to Fees

• Current Assignee: Medrad Incorporated (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Reilly, David M., Hirschman, Alan D.
• Primary Examiner(s): MCDERMOTT, CORRINE MARIE
• Application Number:
  US09/027,481
• Time in Patent Office: 781 Days
• Field of Search: 604/131, 604/151, 604/152, 604/154, 604/155, 604/207-211, 604/181, 604/187, 604/218, 604/224
• US Class Current: 604/154
• CPC Class Codes: A61M 2005/14573 with a replaceable reservoir for quick connection/disconnection with a driving system
• 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 5/1458 Means for capture of the plunger flange
• CPC Class Codes: A61M 5/31511 Piston or piston-rod constructions, e.g. connection of piston with piston-rod A61M5/5066 takes precedence

Abstract

A syringe for use with a powered injector includes an elongated body having an interior surface, a plunger movably mounted in the elongated body for pressurizing the fluid medium, and a plunger extension connected to the plunger and extending rearward from the plunger. The plunger extension includes at least one spine member operable to engage at least one engagement member on the interior surface of the elongated body. The at least one spine member and the at least one engagement member cooperate to prevent relative rotation between the plunger extension and the elongated body.

Claims

1. A syringe for use with a powered injector comprising a drive member having at least one injector attachment member, the syringe comprising:

an elongated body comprising at least one engagement member defining a slot on an interior surface thereof; and

a plunger movably mounted in the elongated body for pressurizing a fluid medium, the plunger comprising at least one spine member operable to engage the at least one engagement member on the interior surface of the elongated body and a plurality of plunger attachment members located over a range of axial positions on the plunger, one or more of the plunger attachment members operable to releasably engage the at least one injector attachment member on the drive member upon rotation of the plunger with respect to the drive member, the at least one spine member and the at least one engagement member cooperable to prevent relative rotation between the plunger and the elongated body.

2. The syringe of claim 1 wherein the at least one engagement member comprises at least one tab member extending from the interior surface of the elongated body.

3. The syringe of claim 2 wherein the at least one tab member is integrally formed with the elongated body.

4. The syringe of claim 2 wherein the at least one spine member comprises two spine members, and further wherein the at least one tab member extends between the two spine members.

5. The syringe of claim 1 wherein the at least one spine member and the at least one engagement member allow the plunger to axially move within the elongated body.

6. A syringe for use with an injector having a drive member, the syringe comprising:

an elongated body comprising at least one engagement member defining a slot on an interior surface thereof; and

a plunger movably mounted in the elongated body for pressurizing a fluid medium, the plunger comprising at least one spine member operable to engage the at least one engagement member on the interior surface of the elongated body and at least one plunger attachment member operable to releasably engage one or more of a plurality of injector attachment members located over a range of axial positions on the drive member upon rotation of the plunger with respect to the drive member, the at least one spine member and the at least one engagement member cooperable to prevent relative rotation between the plunger and the elongated body.

7. The syringe of claim 6 wherein the at least one engagement member comprises at least one tab member extending from the interior surface of the elongated body.

8. The syringe of claim 7 wherein the at least one tab member is integrally formed with the elongated body.

9. The syringe of claim 7 wherein the at least one spine member comprises two spine members, and further wherein the at least one tab member extends between the two spine members.

10. The syringe of claim 6 wherein the at least one spine member and the at least one engagement member allow the plunger to axially move within the elongated body.

11. An injection system comprising, in combination, an injector and a syringe, the injector comprising:

a housing; and

a drive member disposed within the housing, the drive member comprising a plurality of injector attachment members located over a range ot axial positions thereon;

the syringe comprising;

an elongated body comprising at least one engagement member defining a slot on an interior surface thereof; and

a plunger movably disposed in the elongated body for pressurizing a fluid medium, the plunger comprising at least one spine member operable to engage the at least one engagement member on the interior surface of the elongated body and a plurality of plunger attachment members located over a range of axial positions thereon, one or more of the plunger attachment members operable to releasably engage one or more of the injector attachment members upon rotation of the plunger with respect to the drive member, the at least one spine member and the at least one engagement member cooperable to prevent relative rotation between the plunger and the elongated body.

12. The injection system of claim 11 wherein the at least one engagement member comprises at least one tab member extending from the interior surface of the elongated body.

13. The injection system of claim 12 wherein the at least one tab member is integrally formed with the elongated body.

14. The injection system of claim 12 wherein the at least one spine member comprises two spine members, and further wherein the at least one tab member extends between the two spine members.

15. The injection system of claim 11 wherein the at least one spine member and the at least one engagement member allow the plunger to axially move within the elongated body.