Dual syringe injector system

• US 8,574,200 B2
• Filed: 03/12/2012
• Issued: 11/05/2013
• Est. Priority Date: 05/30/2002
• Status: Active Grant

• Current Assignee: Bayer Healthcare LLC (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Hack, Dennis P.
• Primary Examiner(s): BERDICHEVSKY, AARTI
• Application Number:
  US13/417,601
• Publication Number:
  US 20120226157A1
• Time in Patent Office: 603 Days
• Field of Search: 604/131, 604/134, 604/151, 604/152, 604/154, 604/187, 604/218, 604/219, 604/220, 604/228
• US Class Current: 604/218
• CPC Class Codes: A61M 2005/14208 with a programmable infusion control system, characterised by the infusion program
• 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
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence
• CPC Class Codes: A61M 5/31515 Connection of piston with piston rod

Abstract

Dual syringe injector systems are disclosed. An injector system may include a housing, a first and a second drive member within the housing and operable to engage a plunger of a first and a second syringe, respectively, a first and a second syringe retaining mechanism associated with the housing and adapted to engage the first and second syringe, respectively, a pressure sensing device connected the first and/or the second drive member and adapted to measure fluid pressure within a syringe when the syringe is engaged by a drive member, and a control system operably attached to the first and second drive members and the pressure sensor sensing device. The control system may be configured to individually control the first and second drive members simultaneously. The control system may be capable of causing sequential or simultaneous injection.

Claims

1. An injector comprising:

a housing;

a first drive member at least partially disposed within the housing and operable to engage a plunger of a first syringe;

a first syringe retaining mechanism associated with the housing, the syringe retaining mechanism adapted to releasably engage the first syringe;

a second drive member at least partially disposed within the housing and operable to engage a plunger of a second syringe;

a second syringe retaining mechanism associated with the housing, the syringe retaining mechanism adapted to releasably engage the second syringe;

a pressure sensing device operably connected to at least one of the first drive member or the second drive member, the pressure sensing device being adapted to measure fluid pressure within at least one of the first syringe and the second syringe when the respective syringe is engaged by the respective drive member; and

a control system operably attached to the first drive member, the second drive member, and the pressure sensing device, the control system being configured to individually control the first drive member and second drive member simultaneously, wherein the control system is capable of causing sequential injection or simultaneous injection.

2. The injector system of claim 1, wherein the first syringe comprises at least one of contrast and saline.

3. The injector system of claim 1, further comprising a fluid path configured to deliver fluid to a single injection site.

4. The injector system of claim 1, wherein the control system is capable of causing injection of fluid from the first syringe and the second syringe at different flow rates, pressures, or combinations thereof.

5. The injector system of claim 1, wherein the control system is capable of causing sequential injection in at least two phases.

6. The injector system of claim 1, further comprising a fluid path configured to deliver fluid to two or more different injection sites.

7. The injector system of claim 1, wherein each of the first syringe and the second syringe comprise a tubular body and wherein the respective plunger of each of the first syringe and the second syringe is slidably positioned within the respective tubular body.

8. The injector system of claim 1, further comprising one or more sensors configured to provide information about the first syringe, the second syringe, or combinations thereof.

9. The injector system of claim 1, further comprising a fluid path configured to deliver fluid from a reservoir to one of the first syringe or the second syringe.

10. The injector system of claim 1, further comprising one or more adapters configured to secure the first syringe, the second syringe, or combinations thereof to the housing.

11. The injector system of claim 1, further comprising a display operably connected to the control system.

12. The injector system of claim 11, wherein the display comprises a touch screen.

13. The injector system of claim 1, wherein each of the first drive member and the second drive member comprises a piston operably connected to the respective drive member and configured to contact a rearward or an inward surface of the respective plunger of at least one of the first syringe and the second syringe.

14. The injector system of claim 13, wherein each of the first drive member and the second drive member further comprises one or more retractable pins configured to form an abutting connection with one or more ledges, flanges or grooves formed around an interior circumference of the respective plunger.

15. The injector system of claim 13, wherein each of the first drive member and the second drive member further comprises a sensing pin operably connected to the respective piston and configured to contact the respective plunger during advancement of the piston.

16. The injector system of claim 15, further comprising a field sensor operably connected to the control system and configured to sense rearward movement of each sensing pin.

17. The injector system of claim 16, wherein the field sensor is an optical sensor.