Patent ID: 7686789
Filing Date: 2010-03-30
Classification: A61B,A61M

Abstract:
1. A chemical liquid injection system at least comprising: a liquid syringe including a cylindrical cylinder member and a piston member slidably inserted into the cylinder member from the back thereof the cylinder member including an annular cylinder flange formed on an outer circumference of a trailing end; 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, wherein the liquid syringe has an RFID chip put on a predetermined position of the cylinder member for wirelessly transmitting recorded data, the chemical liquid injector includes a cylinder holding mechanism for holding the cylinder member, a piston driving mechanism for at least pressing the piston member into the held cylinder member, an RFID reader for wirelessly receiving the recorded data from the RFID chip, and a computer unit configured to allow operation of the piston driving mechanism only when the recorded data is wirelessly received, wherein the RFID reader continuously detects the RFID chip during injection, and if said detection is interrupted, injection operation by the piston driving mechanism is stopped, and the RFID chip can communicate with the RFID reader when the cylinder holding mechanism holds the cylinder member in a particular direction of rotation about the center, and the RFID chip cannot communicate with the RFID reader when the cylinder member is at a position after rotation to a predetermined angle from the particular direction.