CHEMICAL LIQUID INFUSION SYSTEM

• US 20090149744A1
• Filed: 11/17/2005
• Published: 06/11/2009
• Est. Priority Date: 11/18/2004
• Status: Abandoned Application

• Current Assignee: Nemoto Kyorindo Company Limited
• Original Assignee: Nemoto Kyorindo Company Limited
• Inventors: Nemoto, Shigeru, Sakakibara, Masahiro, Ono, Seiichi
• Application Number:
  US11/719,600
• Publication Number:
  US 20090149744A1
• Time in Patent Office: Days
• US Class Current: 600/432
• CPC Class Codes: A61M 2205/3569 sublocal, e.g. between console and disposable
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/60 with identification means
• CPC Class Codes: A61M 2205/6054 Magnetic identification systems
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/14546 Front-loading type injectors
• CPC Class Codes: A61M 5/1456 with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
• CPC Class Codes: A61M 5/172 electrical or electronic A61M5/16804, A61M5/16831 take precedence

Abstract

A chemical solution injection system, wherein a RFID chip (230) is mounted on a chemical liquid syringe (200) in the state of being wrapped around the outer surface of the cylinder member (210) thereof. An amplification antenna (240) wrapped one turn around the outer surface of the cylinder member (210) is disposed at the front of the RFID chip (230) parallel with each other. Since the communication performance of the RFID chip is increased by the amplifying antenna, the RFID chip (230) of the chemical solution syringe (200) is allowed to satisfactorily communicate with the RFID reader (131) of injection head (110).

Claims

1. A chemical solution injection system at least comprising:

a chemical solution syringe including a cylindrical cylinder member and a columnar piston member slidably inserted into the cylinder member from the back thereof, the cylinder member including a tubular conduit portion formed at a front end and an annular cylinder flange formed at a rear end on outer circumference; and

a chemical solution injector for injecting the chemical solution into a patient by relatively moving the cylinder member and the piston member of the chemical solution syringe mounted interchangeably,

wherein the chemical solution syringe includes

a RFID (Radio Frequency Identification) chip having a predetermined elongated shape, wound on the outer circumference surface of the cylinder member, and an amplification antenna having a shape encircling the outer circumference surface of the cylinder member, placed in front of and in parallel with the RFID chip,

the chemical solution 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, and

a RFID reader for performing wireless communication with the RFID chip on the held cylinder member.

2. The chemical solution injection system according to claim 1, wherein the distance between centers of the RFID chip and the amplification antenna is generally an integral multiple of the wavelength of the wireless communication.

3. The chemical solution injection system according to claim 2, wherein the RFID chip and the RFID reader wirelessly communicate at a frequency of 2.45 GHz, and the distance between the centers of the RFID chip and the amplification antenna is approximately 12.5 mm.

4. The chemical solution injection system according to claim 1, wherein the distance between the centers of the RFID chips and the amplification antenna is ½

ⁿth (n is a natural number) of a wavelength of the wireless communication.

5. The chemical solution injection system according to claim 1, wherein, in the chemical solution syringe, a front end portion of the piston member is placed at a rear end portion of the cylinder member, and the RFID chip and the amplification antenna are placed on an outer circumference surface of the rear end portion of the cylinder member, at a position overlapping the front end portion of the piston member.

6. The chemical solution injection system according to claim 1, wherein the RFID reader includes a communication circuit and a reader antenna connected to the communication circuit, and the reader antenna is placed at the rear of the held cylinder member in the chemical solution injector.

7. The chemical solution injection system according to claim 6, wherein, in the chemical solution injector, the reader antenna is placed on a plane generally in parallel with a circular plane formed by the amplification antenna of the held cylinder member.

8. The chemical solution injection system according to claim 7, wherein the reader antenna is formed of a circular polarization antenna.

9. The chemical solution injection system according to claim 7, wherein the reader antenna is formed of a planar antenna.

10. The chemical solution injection system according to claim 7, wherein the reader antenna is formed of a linear antenna.

11. The chemical solution injection system according to claim 1, wherein the chemical solution injector includes display means for outputting with display at least some of various types of data wirelessly received from the RFID chip by the RFID reader.

12. The chemical solution injection system according to claim 1, wherein the chemical solution injector includes an operation control means for controlling at least the operation of the piston driving mechanism in accordance with various types of data wirelessly received from the RIFD chip by the RFID reader.

13. The chemical solution injection system according to claim 12, wherein the operation control means allows the operation of the piston driving mechanism, only when the RFID reader detects the RFID chip.

14. The chemical solution injection system according to claim 12, wherein the operation control means returns the piston driving mechanism to an initial position when completion of the injection operation is detected and then detection of the RFID chip by the RFID reader is ended.

15. The chemical solution injection system according to claim 12, wherein the operation control means includes a data holding means for holding the various types of data wirelessly received from the RFID chip, and an injection control means for controlling operation of the piston driving mechanism in accordance with at least some of the various types of held data.

16. The chemical solution injection system according to claim 15, wherein the chemical solution syringe is of a pre-filled type which is shipped with a contrast medium contained therein as the chemical solution to be injected into a patient whose diagnostic image is taken by an imaging diagnostic apparatus, the RFID chip of the chemical solution syringe having a data of operation pattern set thereon with which an injection speed of the contrast medium is changed over time, and the operation control means changes an operation speed of the piston driving mechanism in accordance with the operation pattern.

17. The chemical solution injection system according to claim 12, wherein the operation control means includes a check storing means for storing a predetermined check condition as data, a data comparing means for comparing the check condition stored as data with the various types of data wirelessly received from the RFID chip, and an alarm outputting means for outputting and notifying a check alarm in accordance with the comparison result.

18. The chemical solution injection system according to a claim 12, wherein the RFID chip has at least a production number of the chemical solution syringe for each item set thereon, and the operation control means includes a data accumulating means for storing data of the production number of the chemical solution syringe mounted and used to perform injection operation, data comparing means for comparing the stored production number with the new production number, and an alarm outputting means for outputting and notifying a check alarm when the compared production numbers match.

19. The chemical solution injection system according to claim 12, wherein the RFID chip is put on the chemical solution syringe, to record at least the fact that that chemical solution syringe is once used, and the operation control means includes a data recording means for recording, on the RFID chip of the chemical solution syringe, data of the fact that that chemical solution syringe has been mounted and the chemical solution thereof has been injected, and an alarm outputting means for outputting and notifying a check alarm when that data is wirelessly received from the RFID chip of the chemical solution syringe.

20. The chemical solution syringe of the chemical solution injection system according to claim 1, wherein the RFID chip, having a predetermined elongated shape, is wound on the outer circumference surface of the cylinder member, and an amplification antenna having a shape encircling the outer circumference surface of the cylinder member is placed in front of and in parallel with the RFID chip.