System and method for providing information from a syringe to an injector

• US 6,475,192 B1
• Filed: 07/07/2000
• Issued: 11/05/2002
• Est. Priority Date: 08/17/1992
• Status: Expired due to Fees

• Current Assignee: Medrad Incorporated (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Reilly, David M., Gelblum, Eugene A., Havrilla, Joseph B., Kazousky, Daniel
• Primary Examiner(s): Nguyen, Anhtuan T.
• Assistant Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US09/611,939
• Time in Patent Office: 851 Days
• Field of Search: 604/49, 604/65, 604/67, 604/111, 604/118, 604/131, 604/189, 604/154, 604/151, 604/218, 604/152, 604/228, 604/187, 604/135, 604/500, 128/DIG.1, 235/375, 235/435, 235/448, 235/454, 235/462, 235/453, 116/227
• US Class Current: 604/189
• CPC Class Codes: A61M 2005/14553 comprising a pressure jacket
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/582 by tactile feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• 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: Y10S 128/01 Motorized syringe

Abstract

A front-loading syringe which comprises a movable plunger for injecting liquid contrast media, is rotatably mountable on a front wall of an injector housing with an interference fit and in sealed relationship with respect thereto, with or without a pressure jacket, by a first-quick release mechanism. At the same time, the plunger is connected to an injector drive mechanism by a second readily releasable mechanism. During the mounting operation, a sensor reads injection information from an indicator device on the syringe and feeds it to an injector control. An audible-and-tactile indicating mechanism also is activated when the syringe is essentially in the desired mounted position. The syringe may include reinforcing ribs which also function as volumetric gradations, and liquid media presence-or-absence indicating dots which appear circular against a liquid media background and oval-shaped against an air background. An injection end of the syringe comprises an injector portion of reduced diameter inside a screw-threaded attachment portion of larger diameter, and may include loop-shaped reinforcing handle portions.

Claims

1. A method of providing syringe information from a syringe comprising a body comprising at least one mounting flange, an encoding device and a plunger disposed within the body to an injector comprising a housing comprising at least one retaining flange, a motor operable to drive a piston, a sensor associated with the housing and a control unit in communication with the sensor and the motor, the method comprising:

rotating the syringe such that the at least one mounting flange is rotated to cause engagement with the at least one retaining flange on the injector housing;

reading the syringe information provided by the encoding device with the sensor as the syringe is rotated to cause engagement with the injector; and

forwarding the syringe information from the sensor to the control unit.

2. The method of claim 1 wherein the sensor is associated with the housing proximate to the at least one retaining flange.

3. The method of claim 1 wherein the encoding device is associated with the body of the syringe.

4. The method of claim 1, further comprising controlling the motor based on the syringe information.

5. The method of claim 4 wherein the control unit modifies the operation of the injector based on the syringe information.

6. The method of claim 1 wherein the encoding device comprises a bar code.

7. The method of claim 1 wherein the encoding device comprises a mechanically readable device.

8. The method of claim 7 wherein the mechanically readable device comprises a slot.

9. The method of claim 7 wherein the mechanically readable device comprises one or more projections.

10. The method of claim 1 wherein the encoding device comprises an optically readable device.

11. The method of claim 1 wherein the sensor comprises a switch.

12. The method of claim 1 wherein the encoding device comprises one or more raised surfaces.

13. The method of claim 1 wherein the syringe information comprises the dimensions of the syringe.

14. The method of claim 1 wherein the syringe information comprises the contents of the syringe.

15. The method of claim 1 wherein the syringe information comprises flow rates.

16. The method of claim 1 wherein the encoding device is associated with the plunger of the syringe.

17. A syringe for use with an injector comprising a housing containing a motor operable to drive a piston, a sensor and a control unit in communication with the sensor and the motor, the syringe comprising:

a body comprising a front end and a rear end;

a plunger disposed within said body and operable to be driven by the piston of the injector; and

an encoding device on said plunger and operable to provide syringe information to the sensor,

whereby the sensor is operable to read the syringe information provided by said encoding device and to forward the syringe information to the control unit of the injector, the control unit operable to receive the syringe information from the sensor and to control the motor of the injector based on the syringe information.

18. The syringe of claim 17 wherein said encoding device comprises a bar code.

19. The syringe of claim 17 wherein said encoding device comprises an optically readable device.

20. The syringe of claim 17 wherein the syringe information comprises liquid media information.

21. The syringe of claim 17 wherein the syringe information comprises liquid media injection information.

22. The syringe of claim 17, further comprising at least one mounting flange associated with the body.

23. The syringe of claim 22 wherein the at least one mounting flange is associated with the rear end of the body.

24. The syringe of claim 22, further comprising a flange member associated with the body between the at least one mounting flange and the front end of the body.