Chemical liquid injection system
First Claim
1. A chemical liquid injection system comprising:
- a liquid syringe having a piston member slidably inserted into a cylinder member having a tubular shape, the cylinder member has a cylinder flange formed on a trailing end of a cylinder body, and the cylinder flange has a pair of flat portions in parallel at opposite positions on its outer circumference; and
a chemical liquid injector for injecting a liquid into a patient by pressing the piston member into the cylinder member of the liquid syringe mounted interchangeably thereon,wherein an RFID tag including a tag antenna formed of a loop antenna is positioned on an outer circumference of the cylinder member, andthe chemical liquid injector includes a cylinder holding mechanism for holding the cylinder member, a piston driving mechanism for pressing the piston member into the held cylinder member, an RFID reader for receiving data from the RFID tag through electromagnetic induction via a pair of reader antennas formed of loop antennas and connected to each other, a processor configured to permit operation of the piston driving mechanism only when the data is received and an antenna placement portion for placing the paired reader antennas at opposite positions across the axis of the cylinder member and one of the reader antennas at a position opposite to the tag antenna generally in parallel while the cylinder member is appropriately held by the cylinder holding mechanism such that the flat portions of the cylinder flange are located at the top and the bottom.
1 Assignment
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Accused Products
Abstract
A chemical liquid injector comprises liquid syringe 200 and a chemical liquid injector. Liquid syringe 200 has cylinder member 210, a piston member and RFID tag 230 put on an outer circumference of cylinder member 210. The chemical liquid injector has cylinder holding mechanism 120 for holding cylinder member 210, a piston driving mechanism for driving the piston member and an RFID reader. The RFID reader has reader antennas 132L, 132R placed opposite to a tag antenna so as to be able to receive data from RFID tag 230 with cylinder member 210 is appropriately held by the cylinder holding mechanism. The piston driving mechanism is permitted to operate only when the RFID reader receives data from RFID tag 230.
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Citations
21 Claims
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1. A chemical liquid injection system comprising:
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a liquid syringe having a piston member slidably inserted into a cylinder member having a tubular shape, the cylinder member has a cylinder flange formed on a trailing end of a cylinder body, and the cylinder flange has a pair of flat portions in parallel at opposite positions on its outer circumference; and a chemical liquid injector for injecting a liquid into a patient by pressing the piston member into the cylinder member of the liquid syringe mounted interchangeably thereon, wherein an RFID tag including a tag antenna formed of a loop antenna is positioned on an outer circumference of the cylinder member, and the chemical liquid injector includes a cylinder holding mechanism for holding the cylinder member, a piston driving mechanism for pressing the piston member into the held cylinder member, an RFID reader for receiving data from the RFID tag through electromagnetic induction via a pair of reader antennas formed of loop antennas and connected to each other, a processor configured to permit operation of the piston driving mechanism only when the data is received and an antenna placement portion for placing the paired reader antennas at opposite positions across the axis of the cylinder member and one of the reader antennas at a position opposite to the tag antenna generally in parallel while the cylinder member is appropriately held by the cylinder holding mechanism such that the flat portions of the cylinder flange are located at the top and the bottom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification