Reservoir for Collection and Reuse of Diverted Medium

A method for collecting and re-using a fluid medium derived from diversion of at least some of an injection of the medium to a selected site within a patient's body, the method comprising:

• providing a flow diverter assembly disposed in a fluid medium flow path between an injection syringe and a medium delivery catheter, the flow diverter assembly configured to divert at least a portion of a fluid medium injection from the medium flow path between the syringe and the delivery catheter, during injection;
• injecting medium into the selected site within the patient's body with the injection syringe;
• and
• simultaneously diverting at least a portion of the fluid medium through the flow diverter assembly and into a diversion reservoir, said diversion reservoir being fluidly coupled to a sterile medium container, and wherein the diversion reservoir is configured so as to preferentially allow re-use of the diverted medium in a reservoir chamber of the diversion reservoir prior to allowing use of medium in the sterile medium container;
• wherein at least a portion of the injected medium previously resided in the reservoir chamber.