Patent ID: 7828776

Claim:
A chemical liquid injection system at least comprising: a liquid syringe including a cylinder member filled with a liquid and a piston member slidably inserted into the cylinder member; and a chemical liquid injector for injecting the liquid into a patient by relatively moving the cylinder member and the piston member of the liquid syringe replaceably mounted thereon, using a liquid injection mechanism, wherein the liquid syringe has data storing means on which liquid-identification data for the filled liquid and an injection pattern for varying the injection rate with time are recorded, and the chemical injector further comprises operation control means configured to control the liquid injection mechanism by changing the operation rate of the liquid injection mechanism with time in accordance with the injection pattern, wherein the chemical liquid injector includes: liquid data acquiring means for acquiring the data from the data storing means; patient chart data acquiring means for acquiring data on contra-indicated liquid from an external electronic chart, wherein at least identification data for the contra-indicated liquid for injection are registered as the data on contra-indicated liquid in the electronic chart for each of the patients; data comparing means for comparing the acquired liquid-identification data and the acquired data on contra-indicated liquid; and alarm notifying means for notifying an alarm when the liquid-identification data matches the data on contra-indicated liquid.