Disposable front loadable syringe and injector

• US 7,998,133 B2
• Filed: 04/23/2008
• Issued: 08/16/2011
• Est. Priority Date: 11/17/2004
• Status: Active Grant

• Current Assignee: Liebel-Flarsheim Company (Mallinckrodt plc)
• Original Assignee: Mallinckrodt Incorporated (Mallinckrodt plc)
• Inventors: Fago, Frank M., Lewis, Frank M.
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): Bouchelle; Laura A
• Application Number:
  US12/107,988
• Publication Number:
  US 20080215007A1
• Time in Patent Office: 1,210 Days
• Field of Search: 604/131, 604/181, 604/523, 604/533, 604/154
• US Class Current: 604/533
• CPC Class Codes: A61M 2005/14553 comprising a pressure jacket
• CPC Class Codes: A61M 2005/3103 Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle
• 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 5/344 using additional parts, e.g. clamping rings or collets
• CPC Class Codes: A61M 5/346 friction fit A61M5/344 takes precedence

Abstract

A syringe for an injector that has at its nozzle end a connection to the fluid delivery tubing that prevents, reduces, or eliminates fluid leaks, by virtue of a ridge on the external surfaces of the connector which engage to tubing. Furthermore, the syringe and injector are configured to permit the syringe to be oriented in more than one manner on the injector.

Claims

1. A syringe comprising:

a syringe case comprising;

a proximal end and an opposing remote end;

a discharge neck located at the remote end of the syringe case; and

tubing connector located at a remote end of the discharge neck, the tubing connector comprising;

a taper comprising a proximal end, an opposing distal end, an annular first ridge disposed at the distal end of the taper about a peripheral circumference of the taper and spaced from a proximal end of the taper, and an annular second ridge disposed between said proximal and distal ends about a peripheral circumference of the taper; and

an internal threaded section disposed about the taper at least in the portion of said taper including said annular first ridge and annular second ridge, wherein the internal threaded section is substantially immobile relative to the taper; and

a plunger disposed within an internal cavity of the syringe case.

2. The syringe of claim 1, wherein the taper is at least a six degree taper.

3. The syringe of claim 1, further comprising:

a pressure cap connected to a front wall of the syringe case.

4. The syringe of claim 1, wherein the syringe case is formed of molded plastic material.

5. The syringe of claim 1, further comprising:

a medical fluid disposed within an internal syringe cavity of the syringe case.

6. The syringe of claim 5, wherein the medical fluid is contrast media.

7. An injector assembly for injecting medical fluid into a patient, comprising:

an electrically powered injector; and

a syringe mounted to the injector, the syringe comprising;

a unitary, single piece syringe case comprising;

a proximal end and an opposing remote end;

a discharge neck located at the remote end of the syringe case; and

tubing connector located at a remote end of the discharge neck, the tubing connector comprising;

a taper comprising a proximal end, an opposing distal end, an annular first ridge disposed at the distal end of the taper about a peripheral circumference of the taper and spaced from a proximal end of the taper, and an annular second ridge disposed about a peripheral circumference of the taper; and

an internal threaded section disposed about the taper at least in the portion of said taper including said annular first ridge and said annular second ridge, wherein the internal threaded section is substantially immobile relative to the taper; and

a plunger disposed within an internal cavity of the syringe case.

8. The injector assembly of claim 7, wherein the second ridge is disposed between the proximal end and the distal end of the taper.

9. The injector assembly of claim 7, wherein the taper is at least a six degree taper.

10. The injector assembly of claim 7, further comprising:

a pressure cap connected to a front wall of the syringe case.

11. The injector assembly of claim 7, wherein the syringe case is formed of molded plastic material.

12. The injector assembly of claim 7, further comprising:

a medical fluid disposed within an internal syringe cavity of the syringe case.

13. The injector assembly of claim 12, wherein the medical fluid is contrast media.