Patent ID: 8417320

Claim:
A power injector comprising: a syringe plunger driver comprising a motorized drive source and a plunger interface, wherein said plunger interface is movable in multiple directions by operation of said motorized drive source; and a syringe comprising an internal fluid discharge chamber, a syringe plunger movably disposed within said fluid discharge chamber, and a visual indicator member disposed outside of said internal fluid discharge chamber, wherein said syringe plunger driver interacts with said syringe plunger to move said syringe plunger in at least a first direction, wherein said visual indicator member is in a first state prior to movement of said syringe plunger by said syringe plunger driver, and wherein said visual indicator member is irreversibly changed to a second state in response to movement of said syringe plunger by said syringe plunger driver and a resulting pressurization within said internal fluid discharge chamber.