The invention proposes a kind of for operating the scheme of injecting systems, the injecting systems include presser unit and at least one supply station to presser unit supply medical fluid, supply station include for accommodate at least one container of the medical fluid, with container and presser unit be in fluid communication with for medical fluid to be conveyed to patient conveying device and the clamping components to be used to adjust the flow for the medical fluid for passing through conveying device associated with conveying device. Method includes the following steps: operation presser unit is completed until the first injection process Injecting systems are maintained at dormant state before starting the second injection process And presser unit is operated until the second injection process is completed. The step of keeping injecting systems to stand by includes the steps that being configured for releasing clamping conveying device on clamping components.
