Chemical liquid injection system

• US 7,967,778 B2
• Filed: 03/02/2005
• Issued: 06/28/2011
• Est. Priority Date: 03/03/2004
• Status: Active Grant

• Current Assignee: Nemoto Kyorindo Company Limited
• Original Assignee: Nemoto Kyorindo Company Limited
• Inventors: Tano, Nobuhisa, Nemoto, Shigeru
• Primary Examiner(s): Sirmons; Kevin C
• Assistant Examiner(s): Schell; Laura C
• Application Number:
  US10/598,536
• Publication Number:
  US 20070167919A1
• Time in Patent Office: 2,309 Days
• Field of Search: 604151-153, 604/247, 604/154, 604/155, 604/189, 604/30, 604/31, 604/65, 604/67, 604/118
• US Class Current: 604/67
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/33 Controlling, regulating or measuring
• CPC Class Codes: A61M 2205/36 related to heating or cooling
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2205/581 by audible feedback
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/6009 for matching patient with his treatment, e.g. to improve transfusion security
• CPC Class Codes: A61M 2205/6018 providing set-up signals for the apparatus configuration
• CPC Class Codes: A61M 2205/6054 Magnetic identification systems
• CPC Class Codes: A61M 5/007 for contrast media
• CPC Class Codes: A61M 5/1408 in parallel, e.g. manifolds, sequencing valves access sites A61M39/02; tube connectors A61M39/10
• 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: G06K 7/10366 the interrogation device being adapted for miscellaneous applications

Abstract

RFID chip (214) having various types of data is mounted on liquid syringe (200). Chemical liquid injector (100) obtains the various types of data from RFID chip (214) to perform a predetermined operation in accordance with at least some of the various types of data. For, example, a variable pattern for liquid can be recorded on RFID chip (214) of liquid syringe (200) to allow chemical liquid injector (100) to inject the liquid in accordance with the predetermined variable pattern. Thus, a large amount of data can be easily input to the chemical liquid injector to perform the various operations.

Claims

1. A chemical liquid injection system including:

a liquid syringe having a piston member being inserted slidably into a cylinder member filled with a liquid, and a chemical liquid injector having a liquid injection mechanism for relatively moving the cylinder member and the piston member of the liquid syringe exchangeably mounted on the chemical liquid injector to inject the liquid into a patient, said liquid injections mechanism contains a detector for obtaining a pressure applied to the piston member;

wherein

said liquid syringe further comprises an RFID (Radio Frequency Identification) chip having various types of data recorded thereon, said various types of data including identification data for said liquid syringe, an inner diameter of the cylinder member and a value of pressure resistance of the liquid syringe , the RFID chip being mounted on said liquid syringe, and

said chemical liquid injector further comprises;

an RFID reader for obtaining the various types of data recorded on the RFID chip; and

operation control means configured to perform a predetermined operation including controlling the operation of the liquid injection mechanism such that the detected pressure does not exceed the value of pressure resistance in accordance with at least some of the various types of obtained data, and wherein said operation control means comprises data storing means for storing predetermined check conditions including identification data of usable liquid syringe, data collating means for collating the stored check conditions with the various types of data obtained from said RFID chip, data accumulating means for storing the identification data, and alarm outputting means for outputting a check alarm if the identification data obtained from said RFID chip is not included in the check conditions as a result of the collation, and wherein

said detector obtains the pressure by detecting a stress on the piston member and calculating an injection pressure based on the inner diameter obtained from the RFID chip and the detected stress.

2. The chemical liquid injection system according to claim 1, wherein said chemical liquid injector further comprises data display means for outputting and displaying various types of data, and

said operation control means comprises data holding means for holding the various types of data obtained from said RFID chip and display control means for causing the data display means to output at least some of the various types of held data.

3. The chemical liquid injection system according to claim 2, wherein said chemical liquid injector comprises an injection control unit on which at least the operation control means is mounted and an injection head formed separately from the injection control unit, at least the liquid injection mechanism and the data display means being mounted on the injection head.

4. The chemical liquid injection system according to claim 3, wherein said RFID reader is mounted on the injection head.

5. The chemical liquid injection system according to claim 1, wherein said RFID reader is placed at a position where the RFID reader detects said RFID chip of the mounted liquid syringe in said chemical liquid injector.

6. The chemical liquid injection system according to claim 5, wherein said operation control means controls the liquid injection mechanism to enable its operation only when said RFID reader detects said RFID chip.

7. The chemical liquid injection system according to claim 5, wherein said operation control means places the liquid injection mechanism at an initial position when the completion of injection operation is detected and then the detection of said RFID chip by said RFID reader is finished.

8. The chemical liquid injection system according to claim 1, wherein said operation control means comprises data holding means for holding the various types of data obtained from said RFID chip and injection control means for controlling the operation of the liquid injection mechanism in accordance with at least some of the various types of held data.

9. The chemical liquid injection system according to claim 8, wherein said liquid syringe is of a pre-filled type which is shipped with a contrast medium filled thereinto as the liquid to be injected into a patient whose diagnostic image is taken by a diagnostic imaging apparatus, said RFID chip of the liquid syringe has a variable pattern set thereon for changing an injection rate of the contrast medium with time, and

said operation control means changes the operation rate of the liquid injection mechanism with time in accordance with the variable pattern.

10. The chemical liquid injection system according to claim 1, wherein said liquid syringe has said RFID chip mounted thereon, the fact that the liquid syringe is used once or “

used”

being recorded as data on said RFID chip, and

said operation control means comprises data recording means for recording the “

used”

on said RFID chip of the liquid syringe which was mounted and used to perform injection operation, and alarm outputting means for outputting a check alarm when the “

used”

is obtained from said RFID chip of the liquid syringe.

11. The chemical liquid injection system according to claim 1, further comprising peripheral device for the syringe including a hollow needle-like member inserted into the patient to flow the liquid, an extension tube connecting the needle-like member to said liquid syringe to flow the liquid, and a unidirectional valve inserted into the extension tube to regulate the flow direction of the liquid, and

an RFID chip having various types of data recorded thereon being mounted on each peripheral device for the syringe.

12. The chemical liquid injection system according to claim 1, further comprising peripheral tool for the patient including a wristband put on an arm of the patient and a medical chart on which various types of data about the patient are written, and

an RFID chip having various types of data about the patient recorded thereon being mounted on each peripheral tool for the patient.

13. The chemical liquid injection system according to claim 1, further comprising a liquid warmer for keeping the liquid in the mounted liquid syringe at an appropriate temperature with a heat-retaining mechanism, the liquid warmer being provided separately from said chemical liquid injector,

wherein the liquid warmer comprises:

an RFID reader for obtaining the various types of data recorded on said RFID chip; and

operation control means for performing a predetermined operation in accordance with at least some of the various types of obtained data.

14. A chemical liquid injector in the chemical liquid injection system according to claim 1, comprising:

an RFID reader for obtaining the various types of data recorded on the RFID chip; and

operation control means for performing a predetermined operation in accordance with at least some of the various types of obtained data.

15. A liquid warmer in the chemical liquid injection system according to claim 13, comprising:

an RFID reader for obtaining the various types of data recorded on the RFID chip; and

operation control means for performing a predetermined operation in accordance with at least some of the various types of obtained data.

16. A chemical liquid injection system including:

a liquid syringe having a piston member being inserted slidably into a cylinder member filled with a liquid, and a chemical liquid injector having a liquid injection mechanism for relatively moving the cylinder member and the piston member of the liquid syringe exchangeably mounted on the chemical liquid injector to inject the liquid into a patient, said liquid injections mechanism contains a detector for obtaining a pressure applied to the piston member;

wherein

said liquid syringe further comprises an RFID (Radio Frequency Identification) chip having various types of data recorded thereon, said various types of data including identification data for said liquid syringe, expiration date of a liquid filled in said liquid syringe, an inner diameter of the cylinder member and a value of pressure resistance of the liquid syringe recorded, the RFID chip being mounted on said liquid syringe, and said chemical liquid injector further comprises;

an RFID reader for obtaining the various types of data recorded on the RFID chip; and

operation control means configured to perform a predetermined operation including controlling the operation of the liquid injection mechanism such that the detected pressure does not exceed the value of pressure resistance in accordance with at least some of the various types of obtained data, and wherein

said operation control means comprises data storing means for storing predetermined check conditions including the current date and time, data collating means for collating the stored check conditions with the various types of data obtained from said RFID chip, data accumulating means for storing the identification data and alarm outputting means for outputting a check alarm if the current date and time is after the expiration date as a result of the collation, and

said detector obtains the pressure by detecting a stress on the piston member and calculating an injection pressure based on the inner diameter obtained from the RFID chip and the detected stress.

17. The chemical liquid injection system according to claim 16, wherein said chemical liquid injector further comprises data display means for outputting and displaying various types of data, and

said operation control means comprises data holding means for holding the various types of data obtained from said RFID chip and display control means for causing the data display means to output at least some of the various types of held data.

18. The chemical liquid injection system according to claim 17, wherein said chemical liquid injector comprises an injection control unit on which at least the operation control means is mounted and an injection head formed separately from the injection control unit, at least the liquid injection mechanism and the data display means being mounted on the injection head.

19. The chemical liquid injection system according to claim 18, wherein said RFID reader is mounted on the injection head.

20. The chemical liquid injection system according to claim 16, wherein said RFID reader is placed at a position where the RFID reader detects said RFID chip of the mounted liquid syringe in said chemical liquid injector.

21. The chemical liquid injection system according to claim 20, wherein said operation control means controls the liquid injection mechanism to enable its operation only when said RFID reader detects said RFID chip.

22. The chemical liquid injection system according to claim 20, wherein said operation control means places the liquid injection mechanism at an initial position when the completion of injection operation is detected and then the detection of said RFID chip by said RFID reader is finished.

23. The chemical liquid injection system according to claim 16, wherein said operation control means comprises data holding means for holding the various types of data obtained from said RFID chip and injection control means for controlling the operation of the liquid injection mechanism in accordance with at least some of the various types of held data.

24. The chemical liquid injection system according to claim 23, wherein said liquid syringe is of a pre-filled type which is shipped with a contrast medium filled thereinto as the liquid to be injected into a patient whose diagnostic image is taken by a diagnostic imaging apparatus, said RFID chip of the liquid syringe has a variable pattern set thereon for changing an injection rate of the contrast medium with time, and

said operation control means changes the operation rate of the liquid injection mechanism with time in accordance with the variable pattern.

25. The chemical liquid injection system according to claim 16, wherein said liquid syringe has said RFID chip mounted thereon, the fact that the liquid syringe is used once or “

used”

being recorded as data on said RFID chip, and

said operation control means comprises data recording means for recording the “

used”

on said RFID chip of the liquid syringe which was mounted and used to perform injection operation, and alarm outputting means for outputting a check alarm when the “

used”

is obtained from said RFID chip of the liquid syringe.

26. The chemical liquid injection system according to claim 16, further comprising peripheral device for the syringe including a hollow needle-like member inserted into the patient to flow the liquid, an extension tube connecting the needle-like member to said liquid syringe to flow the liquid, and a unidirectional valve inserted into the extension tube to regulate the flow direction of the liquid, and

an RFID chip having various types of data recorded thereon being mounted on each peripheral device for the syringe.

27. The chemical liquid injection system according to claim 16, further comprising peripheral tool for the patient including a wristband put on an arm of the patient and a medical chart on which various types of data about the patient are written, and

an RFID chip having various types of data about the patient recorded thereon being mounted on each peripheral tool for the patient.

28. The chemical liquid. injection system according to claim 16, further comprising a liquid warmer for keeping the liquid in the mounted liquid syringe at an appropriate temperature with a heat-retaining mechanism, the liquid warmer being provided separately from said chemical liquid injector,

wherein the liquid warmer comprises:

an RFID reader for obtaining the various types of data recorded on said RFID chip; and

operation control means for performing a predetermined operation in accordance with at least some of the various types of obtained data.

29. A chemical liquid injector in the chemical liquid injection system according to claim 16, comprising:

an RFID reader for obtaining the various types of data recorded on the RFID chip; and

operation control means for performing a predetermined operation in accordance with at least some of the various types of obtained data.

30. A liquid warmer in the chemical liquid injection system according to claim 28, comprising:

an RFID reader for obtaining the various types of data recorded on the RFID chip; and

operation control means for performing a predetermined operation in accordance with at least some of the various types of obtained data.

31. A method of injecting a chemical liquid into a patient, comprising

providing an RFID (Radio Frequency Identification) chip mounted on a liquid syringe, said RFID chip having various types of data recorded thereon, said data including identification data for said liquid syringe, an inner diameter of a cylinder member of the syringe, and a value of pressure resistance of the liquid syringe;

mounting said liquid syringe on a chemical liquid injector, said chemical liquid injector comprising a piston member and an RFID reader for obtaining the various types of data recorded on the RFID chip;

injecting the chemical liquid into the patient, said injecting comprising moving the piston member to exert a pressure on the chemical liquid;

detecting the pressure of the chemical liquid injected into the patient by detecting a stress on the piston member and calculating an injection pressure based on the inner diameter obtained from the RFID chip and the detected stress while controlling the pressure such that the pressure does not exceed a predetermined value of pressure resistance in accordance with at least some of the various types of obtained data;

storing predetermined check conditions including identification data of the liquid syringe;

collating the stored check conditions with the various types of data obtained from said RFID chip; and

outputting a check alarm if the identification data obtained from said RFID chip is not included in the check conditions as a result of the collation.

32. A method of injecting a chemical liquid into a patient, comprising

providing an RFID (Radio Frequency Identification) chip mounted on a liquid syringe, said RFID chip having various types of data recorded thereon, said data including identification data for said liquid syringe, expiration date of a liquid filled in said liquid syringe, an inner diameter of a cylinder member of the syringe, and a value of pressure resistance of the liquid syringe;

mounting said liquid syringe on a chemical liquid injector, said chemical liquid injector comprising a piston member and an RFID reader for obtaining the various types of data recorded on the RFID chip;

injecting the chemical liquid into the patient, said injecting comprising moving the piston member to exert a pressure on the chemical liquid;

detecting the pressure of the chemical liquid injected into the patient by detecting a stress on the piston member and calculating an injection pressure based on the inner diameter obtained from the RFID chip and the detected stress while controlling the pressure such that the pressure does not exceed a predetermined value of pressure resistance in accordance with at least some of the various types of obtained data;

storing predetermined check conditions including current date and time;

collating the stored check conditions with the various types of data obtained from said RFID chip; and

outputting a check alarm if the identification data obtained from said RFID chip is not included in the check conditions as a result of the collation.