Patent ID: 8523813

Claim:
A medical fluid injector comprising: a first syringe having: a first barrel that includes a first discharge tip; and a first plunger disposed within and movable relative to the first barrel; a second syringe having: a second barrel that includes a second discharge tip; and a second plunger disposed within and movable relative to the second barrel; a first plunger drive ram configured to move the first plunger of the first syringe within and relative to the first barrel of the first syringe both toward and away from the first discharge tip of the first syringe; and a processor which controls movement of the first plunger drive ram, the processor being configured with a purge sequence designed to force air and/or gas from the first syringe via the first discharge tip prior to fluidly connecting the first syringe with a patient, the purge sequence comprising a set of instructions that is stored in memory, wherein the set of instructions for the purge sequence comprises instructions: to move the first plunger drive ram toward a first predetermined stop point to in turn move the first plunger within the first barrel of the first syringe and toward the first discharge tip of the first syringe; to stop the first plunger drive ram at the first predetermined stop point; and to enable a first low flow rate upon the first plunger drive ram reaching and stopping at the first predetermined stop point, wherein the first low flow rate is a flow rate during which a first medical fluid is expelled from the first discharge tip of the first syringe due to the first plunger drive ram moving the first plunger within the first barrel of the first syringe, and wherein the first low flow rate is no more than about 1 ml/sec; and wherein the processor being further configured with an injection protocol designed to inject medical fluid into a patient when the first syringe is fluidly connected with a patient.