Method of preparing for a fluid injection procedure using a medical injector and a syringe

• US 20040133183A1
• Filed: 09/23/2003
• Published: 07/08/2004
• Est. Priority Date: 02/07/2000
• Status: Abandoned Application

• Current Assignee: Medrad Incorporated (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Trocki, Mark, Rhinehart, Edward J., Cowan, Kevin P., Sciulli, Francis J., Dedig, James A., Hitchins, Mark W., Rygg, Steven C., Parks, Robert D., Fuchs, Larry J.
• Application Number:
  US10/670,154
• Publication Number:
  US 20040133183A1
• Time in Patent Office: Days
• US Class Current: 604/500
• CPC Class Codes: A61M 2039/1077 Adapters, e.g. couplings adapting a connector to one or several other connectors
• CPC Class Codes: A61M 2205/60 with identification means
• CPC Class Codes: A61M 2205/6063 Optical identification systems
• CPC Class Codes: A61M 2205/6072 Bar codes
• CPC Class Codes: A61M 39/10 Tube connectors; Tube couplings A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014
• 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 5/28 Syringe ampoules or carpules, i.e. ampoules or carpules provided with a needle
• CPC Class Codes: A61M 5/31515 Connection of piston with piston rod
• CPC Class Codes: A61M 5/31576 Constructional features or modes of drive mechanisms for piston rods

Abstract

A method of preparing for an injection procedure preferably includes: mounting a syringe comprising a distal end and a plunger on an injector comprising a piston; sensing that the syringe is mounted on the injector; advancing the piston of the injector to engage the plunger of the syringe and to advance the plunger to the distal end thereof; and retracting the piston to retract the plunger and aspirate fluid into the syringe. Preferably, the method includes determining whether the syringe is an empty syringe, a preloaded syringe or a prefilled syringe.

Claims

1. A method of preparing for an injection procedure, the method comprising:

mounting a syringe comprising a distal end and a plunger on an injector comprising a piston;

sensing that the syringe is mounted on the injector;

advancing the piston of the injector to engage the plunger of the syringe and to advance the plunger to the distal end thereof; and

retracting the piston to retract the plunger and aspirate fluid into the syringe.

2. The method of claim 1 wherein the step or act of advancing the plunger operates to expel air from the syringe.

3. The method of claim 1 wherein the step or act of retracting the plunger operates to fill the syringe with an amount of fluid.

4. The method of claim 1, further comprising the step of advancing the piston to prime the syringe and a tube connected to the syringe.

5. The method of claim 4, further comprising the step of advancing the piston to expel fluid from the syringe.

6. The method of claim 1, further comprising the step of retracting the piston after the syringe is removed from the injector.

7. The method of claim 1 wherein the step of advancing the piston to engage the plunger is automatically conducted by the injector.

10. The method of claim 1 wherein the steps or acts of advancing and retracting are conducted automatically by the injector.

8. A method of preparing for an injection procedure, the method comprising:

mounting a syringe comprising a distal end and a plunger on an injector comprising a piston;

sensing that the syringe is mounted on the injector determining whether the syringe is an empty syringe, a preloaded syringe or a prefilled syringe;

advancing the piston of the injector to engage the plunger of the syringe;

advancing the piston of the injector to advance the plunger to the distal end of the syringe if the syringe is an empty syringe;

retracting the piston to retract the plunger and aspirate fluid into the syringe if the syringe is an empty syringe; and

advancing the piston to prime the syringe for the injection procedure.

9. The method of claim 8 wherein the steps or acts of advancing and retracting are conducted automatically by the injector.