Patent ID: 8905969

Claim:
A medical fluid injection system comprising: an injector head comprising a pressurizing unit with a syringe having a chamber and a plunger adapted for movement within the chamber, and a source of motive force for causing the pressurizing unit to receive and/or deliver a medical fluid; a proximal fluid conduit operably engaged with an outlet of the pressurizing unit, the proximal fluid conduit being adapted to be placed in fluid communication with a distal fluid conduit via a fluid connector, thereby establishing a flow path; and a valve for providing fluid isolation along the proximal fluid conduit; wherein the injector head is adapted to perform a method of removing air from the flow path in response to a command from a user of the medical fluid injection system, the method comprising: delivering a first amount of a medical fluid from a pressurizing unit of the fluid injection system to the flow path; providing fluid isolation along the flow path between the fluid connector and the pressurizing unit; creating a vacuum in the pressurizing unit; removing the fluid isolation after creating the vacuum in the pressurizing unit; and delivering a second amount of the medical fluid from the pressurizing unit to the flow path.