JP5063590B2 - Chemical injection system - Google Patents

Description

The present invention relates to a chemical solution injection system for injecting a chemical solution of a chemical solution syringe into a subject with a chemical solution injection device, and in particular, CT (Computed
Tomography) The present invention relates to a chemical injection system for injecting a contrast medium into a subject whose fluoroscopic image is captured by a fluoroscopic imaging apparatus such as a scanner.

At present, as a fluoroscopic imaging apparatus that captures a fluoroscopic image of a subject, a CT scanner, an MRI (Magnetic Resonance Imaging) apparatus, a PET (Positron Emission Tomography) apparatus, an ultrasonic diagnostic apparatus, a CT angiographic apparatus, an MRA (MR
Angio) equipment, etc. When using the fluoroscopic imaging apparatus as described above, a chemical solution such as a contrast medium or physiological saline may be injected into a subject, and a chemical solution injection apparatus that automatically executes this injection has also been put into practical use.

  Such a chemical solution injection device has, for example, a piston drive mechanism including a drive motor and a slider mechanism, and a chemical solution syringe is detachably attached thereto. The chemical syringe generally has a cylinder member and a piston member, and the piston member is slidably inserted into the cylinder member.

  More specifically, the cylinder member has a cylindrical cylinder body, a conduit portion is formed at the center of the closed front end, and the rear end is opened. An annular cylinder flange is formed on the outer periphery of the rear end of the cylinder body, and a piston member is inserted into the inside from the rear end opening.

  Such a chemical syringe includes a prefilled type and a post-filling type. The prefilled type chemical solution syringe is shipped in a state where the cylinder member is filled with the chemical solution and the whole is sealed with a packing material. In the post-filling type medical solution syringe, a cylinder member is filled with a desired chemical solution by a user. In addition, below, in order to demonstrate easily, it demonstrates on the assumption that a chemical | medical solution syringe is a prefilled type.

  When injecting the chemical solution of the chemical solution syringe as described above into the subject, the operator prepares a chemical solution syringe filled with an appropriate chemical solution and takes out the chemical solution syringe from the packing material. When the chemical solution syringe is connected to the subject with an extension tube and mounted on the chemical solution injection device, the cylinder flange is held by the flange holding member. In such a state, since the chemical solution injection device pushes the piston member into the cylinder member by the piston drive mechanism in response to a predetermined operation, the chemical solution is injected from the chemical solution syringe to the subject.

  In that case, when the operator determines the injection speed, the total injection amount, etc. in consideration of the type of the chemical solution and inputs it to the chemical injection device, this chemical injection device injects the chemical into the subject according to the input data. . For example, if a contrast medium is injected as a chemical solution, the contrast level of the subject changes, and a good fluoroscopic image is captured by the fluoroscopic imaging device.

  In addition, there exists a product which can inject a physiological saline with a contrast agent into a test subject in a chemical | medical solution injection device. In that case, the operator inputs to the drug solution injection device together with the injection speed, the total injection amount, and the like to inject physiological saline in conjunction with the completion of the injection of the contrast agent as desired. Then, this chemical injection device automatically injects physiological saline after injecting a contrast medium into the subject corresponding to the input data. For this reason, the contrast agent can be boosted with physiological saline to reduce the consumption of the contrast agent, and the artifact can be reduced with the physiological saline.

  Although the contrast medium has a high viscosity, the chemical liquid injector is suitable for injecting the contrast medium because the piston member can be pushed into the cylinder member of the chemical liquid syringe at a high pressure. However, in order to push the piston member into the cylinder member at a high pressure, it is also necessary to hold the cylinder member firmly.

  For this reason, the chemical injection device implemented by the present applicant has a pair of left and right metal flange holding members, and the flange holding members are supported by a metal main body holding member so as to be freely opened and closed. . The main body holding member has a holding recess formed on the upper surface, and holds the cylinder body inserted from above by the holding recess. The pair of left and right flange holding members are formed with holding slits on the inner surfaces facing each other, and hold the left and right portions of the cylinder flange of the chemical syringe inserted from above in an open state in a closed state.

In addition, the chemical liquid injector that holds the cylinder flange with the pair of flange holding members that can be opened and closed in this way has been filed with various structures by the present applicant (see, for example, Patent Documents 1 to 5).
Patent Document 1: JP-A No. 2004-154238 Patent Document 2: JP-A No. 2004-154239 Patent Document 3: JP-A No. 2004-187849 Patent Document 4: JP-A No. 2004-243090 Patent Document 5: JP-A No. 2004-290454 In the chemical injection device as described above, the cylinder flange of the chemical syringe can be firmly held by the metal flange holding member. Therefore, a high viscosity contrast agent is formed by pushing the piston member into the cylinder member of the chemical syringe at a high pressure. Can be successfully injected into a subject. Moreover, since the openable / closable flange holding member is supported by the metal main body holding member, even if a great stress acts on the flange holding member from the chemical syringe, for example, the main body holding member may be deformed or damaged. I don't have to.

  However, in the current general drug solution syringe, a flat portion is formed on a part of the outer peripheral surface of the cylinder flange in order to prevent unnecessary rolling and the like. This flat portion is usually formed in a shape obtained by partially cutting the circular outer peripheral surface of the cylinder flange into a straight line, and is formed in parallel so as to be paired with the opposing position of the outer peripheral surface of the cylinder flange. Yes. Therefore, the above-described chemical liquid injector is formed in a structure in which a circular portion that is not a flat portion of the cylinder flange is held by a flange holding member. Therefore, the operator needs to hold the cylinder flange on the flange holding member at the position of the circular portion.

  However, even when the flange holding member holds the cylinder flange at the position of the flat portion, it appears that the chemical syringe is appropriately held by the chemical injection device in appearance. In this case, since the area in which the flange holding member holds the cylinder flange decreases, there is a possibility that the cylinder flange may be damaged if the piston member is pushed into the cylinder member at a high pressure.

  Furthermore, since there is a chemical syringe that is currently defined so that one of the pair of flat portions of the cylinder flange is upward, in this case, even if the cylinder flange is held by the flange holding member at the circular portion, the chemical syringe If the up and down direction is reversed, a problem occurs.

  For example, in a chemical solution injection system filed by the present applicant as Japanese Patent Application No. 2004-110853 (WO2005 / 097232A1), a pattern having a predetermined shape when viewed from above through a cylinder member filled with a transparent chemical solution Is divided into the lower surface of the cylinder member and the inner surface of the holding recess of the main body holding member.

  In this chemical solution injection system, the design is visually recognized as a predetermined shape from above the cylinder member only when the chemical solution syringe filled with the chemical solution is properly attached to the chemical solution injection device. With this visual recognition, it is possible to confirm both that the chemical syringe is appropriately held and that the cylinder member is filled with the chemical solution at a time.

  However, in such a chemical liquid injection system, even if the cylinder flange is held by the flange holding member in a circular portion, if the vertical direction of the chemical syringe is reversed, the chemical liquid syringe is appropriately held, Neither can the cylinder member be filled with the chemical solution.

  Furthermore, in the above-described chemical solution injection device, a chemical solution is injected from the chemical solution syringe into the subject. However, in order to inject an appropriate chemical solution, an operator needs to select an appropriate chemical solution syringe. However, since there are products having the same or similar appearance even if the types of the chemical liquids are different, there is a possibility that the chemical liquid syringe with an inappropriate chemical liquid may be mounted on the chemical liquid injector.

  In addition, a product that is not a compatible product may be used as the chemical syringe, and a medical accident may occur due to an inappropriate performance such as pressure resistance. Further, the prefilled type medical solution syringe is discarded after being used once in order to prevent infection or the like, but the current medical solution injection device cannot prevent the used medical solution syringe from being used again.

  Furthermore, as described above, it is necessary to input an injection speed, a total injection amount, and the like corresponding to the chemical solution to be used and the chemical solution syringe. However, this operation is complicated and difficult for unskilled workers, and it is impossible to prevent an inappropriate numerical value from being input. In particular, there are products in which the concentration of the active ingredient differs by several times in the current contrast agent. Therefore, several times or a fraction of the appropriate amount of the contrast agent is injected without considering this.

  Similarly, there are cases where it is necessary to input data into the chemical injection device such as the injection speed of the chemical depending on the imaging region and the body weight of the subject. However, such an operation is complicated and an input error cannot be prevented. In particular, the applicant has filed that the contrast effect can be improved by changing the injection speed of the contrast agent (Japanese Patent Application Laid-Open No. 2004-113475), but it is easy to input such a variable pattern into the drug solution injector. is not.

  The present invention has been made in view of the problems as described above, and provides a chemical injection system that can automatically prevent the piston drive mechanism from being driven in a state where the flange holding member does not appropriately hold the chemical syringe. The purpose is to provide.

  The chemical solution injection system of the present invention includes a chemical solution syringe and a chemical solution injection device. A chemical | medical solution syringe has the cylinder member in which the cylinder flange is formed in the rear-end outer periphery of a cylinder main body, and the piston member inserted slidably from the cylinder member back. The chemical solution injection device injects a chemical solution into a subject by pushing a piston member into a cylinder member of a chemical solution syringe.

The chemical syringe has a vertically and horizontally symmetrical cylinder flange , and an RFID tag is mounted on the outer peripheral surface of the cylinder body. The RFID tag has a circuit chip and a planar loop antenna connected to the circuit chip, and wirelessly transmits recording data by electromagnetic induction.

According to the first aspect of the present invention, the chemical liquid injector includes a main body holding member, a flange holding member, a piston drive mechanism, an RFID reader, an operation control means, first and second antenna sheets, an electromagnetic shielding sheet, and a reader. A support member. The main body holding member is made of metal, and holds the cylinder main body inserted from above in a state where the axial direction is parallel to the front-rear direction by the holding recess. The flange holding member is made of metal and holds the cylinder flange, which is supported by the main body holding member and is inserted from above, at a specific rotational position where a portion of the structure to be vertically moved is positioned vertically . The piston drive mechanism pushes the piston member into the cylinder member held together with the cylinder flange. The RFID reader wirelessly receives the recording data of the RFID tag by electromagnetic induction. The operation control means controls the operation of the piston drive mechanism in response to the wireless reception of the recording data. The antenna sheet has an elongated loop antenna. The electromagnetic shielding sheet blocks electromagnetic induction. The reader support member is formed of a non-conductive material and a non-magnetic material, and a support recess having a shape substantially continuous with the holding recess is formed.

The liquid syringe, RFID tag is arranged at a position of the side of the cylinder member held by the flange holding member at a rotational position of a specific. In the chemical liquid injector, a through hole facing the RFID tag is formed in the main body holding member in a shape that continues from the left to the right of the held chemical liquid syringe. A reader support member is integrally mounted in the through hole of the main body holding member in a state in which the support recess is substantially continuous with the holding recess, and the RFID reader is embedded in the lower part of the inner surface of the support recess of the reader support member. The right end of the first antenna sheet disposed on the left side of the inner surface of the support recess with the longitudinal direction parallel to the left-right direction faces the RFID reader, and the inner surface of the support recess with the longitudinal direction parallel to the left-right direction. The left end of the second antenna sheet disposed on the right side faces the RFID reader, and the upper surfaces of the RFID reader, a portion other than the left end of the first antenna sheet, and a portion other than the right end of the second antenna sheet are It is shielded by an electromagnetic shielding sheet.

  According to the second aspect of the present invention, the chemical injection device has a flange holding member, a main body holding member, a piston drive mechanism, an RFID reader, an operation control means, first and second antenna sheets, and an electromagnetic shielding sheet. is doing. The main body holding member is formed of a non-conductive material and a non-magnetic material. The upper surface of the RFID reader is positioned on the bottom surface of the holding recess of the main body holding member, and the right end of the first antenna sheet arranged on the left side of the inner surface of the holding recess with the longitudinal direction parallel to the left-right direction is the RFID reader. Opposite. The left end of the second antenna sheet disposed on the right side of the inner surface of the holding recess with the longitudinal direction parallel to the left-right direction faces the RFID reader.

  For this reason, in the chemical injection system according to the present invention, electromagnetic induction between the RFID tag and the RFID reader via the antenna sheet is possible only when the chemical syringe is appropriately attached to the chemical injection device.

  The RFID tag and the antenna sheet as described above can be formed in a substantially rectangular sheet shape, for example. The antenna sheet can be formed as a structure corresponding to an RFID tag from which a circuit chip is omitted. Such RFID tags and antenna sheets are approved as communication devices of a unified standard and are mass-produced as off-the-shelf products.

  The various means referred to in the present invention need only be formed so as to realize the function. For example, dedicated hardware that exhibits a predetermined function, a data processing apparatus provided with a predetermined function by a computer program It can be realized as a predetermined function implemented in the data processing apparatus by a computer program, a combination thereof, or the like.

  Further, the various constituent elements referred to in the present invention do not have to be individually independent, and a plurality of constituent elements are formed as one member, and one constituent element is formed of a plurality of members. It is also possible that a certain component is a part of another component, a part of a certain component overlaps a part of another component, and the like.

  Furthermore, in the present invention, the front / rear, left / right, and upper / lower directions are defined, but this is defined for convenience in order to briefly explain the relative relationship of the components of the present invention. The direction at the time of manufacture and use is not limited. Further, the left / right end of the antenna sheet in the present invention means a portion from the outermost edge in the longitudinal direction to an arbitrary range, and may be, for example, a substantially square portion.

  In the chemical injection system according to the present invention, electromagnetic induction between the RFID tag and the RFID reader via the antenna sheet is possible only when the chemical syringe is properly attached to the chemical injection device. It can be detected easily and reliably whether it is properly mounted.

It is a disassembled perspective view which shows the assembly structure of the principal part of the injection | pouring head of the chemical | medical solution injection apparatus by one Embodiment of this invention. It is a perspective view which shows the state by which a chemical | medical solution syringe is mounted | worn with an injection | pouring head. It is a perspective view which shows the external appearance of a chemical injection device. It is a perspective view which shows the external appearance of CT scanner which is a fluoroscopic imaging device. It is typical sectional drawing of the principal part which shows the state by which a chemical | medical solution syringe is mounted | worn with an injection | pouring head. It is a typical front view of the principal part which shows the state by which the chemical | medical solution syringe was mounted | worn with the injection head. It is a typical perspective view which shows the external appearance of a RFID tag. It is a block diagram which shows the circuit structure of a chemical injection system. It is a block diagram which shows the logical structure of a chemical injection device. It is a flowchart which shows the first half part of processing operation of a chemical injection device. It is a flowchart which shows the latter half part of the processing operation of a chemical injection device. It is a flowchart which shows the processing operation of CT scanner. It is a disassembled perspective view which shows the assembly structure of the principal part of the injection | pouring head of a 1st modification. It is typical sectional drawing of the principal part which shows the state by which the chemical | medical solution syringe is mounted | worn with the injection | pouring head of a 2nd modification. It is a perspective view which shows the injection | pouring head of a 3rd modification. It is a disassembled perspective view which shows the assembly structure of the principal part of the injection | pouring head of a 4th modification. It is a perspective view which shows the state by which a chemical | medical solution syringe is mounted | worn with a cylinder adapter by the injection head in the 5th modification.

Explanation of symbols

100, 160 Chemical solution injector 110, 161, 170 Injection head 114, 174, 182 Main body holding member 115 Holding recess 116 Piston drive mechanism 121, 173 Flange holding member 130 Through hole 131, 162 Reader support member 132 Support recess 134 RFID reader 135 First antenna sheet 136 Second antenna sheet 137 Electromagnetic shielding sheet 138 Ferrite sheet 140 Computer unit 150 Operation control means 151 Data storage means 152 Data collating means 153 Warning output means 154 Data storage means 156 Data holding means 157 Display control means 158 Injection control means 171 Display panel 200 Chemical liquid syringe 210 Cylinder member 211 Cylinder body 213 Cylinder flange 220 Piston member 230 RFID tag 232 circuit chip 233 tag antenna 300 CT scanner 400 cylinder adapter 1000 1100 chemical solution injection system

[Configuration of the embodiment]
Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 2 to 5, the chemical injection system 1000 according to the present embodiment includes a chemical injection device 100, a chemical syringe 200, and a CT scanner 300 that is a fluoroscopic imaging device. A fluoroscopic image is taken from a subject (not shown) who injects a medical solution such as a contrast medium.

  The CT scanner 300 has a fluoroscopic imaging unit 301 and an imaging control unit 302 as shown in FIGS. The fluoroscopic imaging unit 301 and the imaging control unit 302 are connected to each other via a communication network 303. The fluoroscopic imaging unit 301 captures a fluoroscopic image from the subject, and the imaging control unit 302 controls the operation of the fluoroscopic imaging unit 301.

  As shown in FIG. 2, the chemical syringe 200 includes a cylinder member 210 and a piston member 220, and the piston member 220 is slidably inserted into the cylinder member 210. The cylinder member 210 has a cylindrical cylinder body 211, and a conduit portion 212 is formed at the closed front end of the cylinder body 211.

  The rear end of the cylinder body 211 of the cylinder member 210 is opened, and the piston member 220 is inserted into the cylinder body 211 from this opening. The cylinder member 210 has an annular cylinder flange 213 formed on the outer periphery of the rear end of the cylinder body 211, and the piston member 220 is an annular piston flange 222 formed on the outer periphery of the piston body 221. have.

  The cylinder member 210 is made of a non-conductive and non-magnetic resin, and has a thickness of about 1.5 mm to 2.0 mm, for example. In the chemical injection system 1000 of this embodiment, at least a part of the chemical syringe 200 to be used is a prefilled type, and the prefilled type chemical syringe 200 is shipped in a state where the cylinder member 210 is filled with the chemical.

  An RFID tag 230 is attached to the cylinder member 210 of the chemical syringe 200. The RFID tag 230 has a name, prefilled type or post-filled type identification data, identification data for each individual, capacity, pressure resistance of the cylinder member 210, inner diameter of the cylinder member 210, stroke of the piston member 220 regarding the chemical syringe 200. Various data such as, etc. are recorded.

  Further, when the chemical syringe 200 is of a prefilled type, the RFID tag 230 has various data such as name, component, viscosity, expiry date, identification data such as whether it is for CT or MR, etc. Is also recorded. Further, when the chemical liquid filled in the prefilled type chemical liquid syringe 200 is a contrast medium, a variable pattern for changing the injection speed with time is recorded in the RFID tag 230 as necessary.

  As shown in FIG. 7, the RFID tag 230 has an elongated resin sheet 231, and a circuit chip 232 is enclosed in the vicinity of one end thereof. Further, the tag antenna 233 is also formed on the resin sheet 231 by a printed wiring as a planar and elongated loop antenna. The tag antenna 233 is connected to the circuit chip 232.

  In the RFID tag 230, for example, the surface of the resin sheet 231 is formed in white, and various information can be printed on this surface. An adhesive material (not shown) is applied to the back surface of the resin sheet 231, and the RFID tag 230 can be attached to the outer peripheral surface of the cylinder member 210 with the adhesive material.

  As shown in FIGS. 2 and 6, the chemical syringe 200 has a pair of flat portions 215 formed in parallel at opposite positions of the circular outer peripheral surface 214 of the cylinder flange 213. Formed in the structure. And with respect to the chemical | medical solution syringe 200 of such a structure, the RFID tag 230 is the left or right side of the outer peripheral surface of the cylinder body 211 in a state where the longitudinal direction thereof coincides with the axial direction of the cylinder member 210. It is attached to the direction.

  As shown in FIG. 3, the chemical injection device 100 of this embodiment includes an injection head 110 and an injection control unit 101 configured separately from the injection head 110, and these are wiredly connected by a communication cable 102. Yes. The injection head 110 drives the chemical solution syringe 200 to be attached to inject the chemical solution into the subject, and the injection control unit 101 controls the operation of the injection head 110.

  The injection head 110 is attached to the upper end of the caster stand 111 via a movable arm 112, and the chemical syringe 200 is detachably attached from above as shown in FIG. The injection head 110 has a head housing 113. The head housing 113 is entirely formed of resin, but as shown in FIG. 2, only the upper part of the front end is formed of a metal main body holding member 114.

  More specifically, the main body holding member 114 is made of a high-strength nonmagnetic metal such as an aluminum alloy, and a holding recess 115 for holding the cylinder main body 211 inserted from above is formed on the upper surface thereof. For example, it is formed in a semi-cylindrical shape having a diameter of about 6 cm. A cylinder holding mechanism 120 is connected to the rear end of the main body holding member 114. The cylinder holding mechanism 120 is made of a high-strength metal such as a stainless alloy.

  The cylinder holding mechanism 120 has a pair of left and right flange holding members 121. The pair of left and right flange holding members 121 includes a fixed holding member 122 and a movable holding member 123. The fixed holding member 122 is fixed to the rear end of the main body holding member 114, and the movable holding member 123 is supported by the rear end of the main body holding member 114 so as to be opened and closed in the left-right direction. The fixed holding member 122 and the movable holding member 123 are formed with arc-shaped holding slits on the inner surface, and the cylinder flange 213 of the drug solution syringe 200 is engaged therewith.

  As shown in FIG. 6, the cylinder holding mechanism 120 can hold the cylinder flange 213 regardless of the rotation angle. However, as shown in FIG. An operator is required to hold the flange 213. When the cylinder flange 213 of the chemical syringe 200 is held by the cylinder holding mechanism 120 at a specific rotational position around this axis, the RFID tag 230 is positioned so as to be located on the left or right side. The cylinder member 210 is attached.

  As shown in FIGS. 1 and 5, the main body holding member 114 is formed with a rectangular through hole 130 that is continuous from the left to the right of the held chemical syringe 200 at a position facing the RFID tag 230. In this through hole 130, a non-conductive and non-magnetic resin-made leader support member 131 is integrally mounted.

  The reader support member 131 is formed with a support recess 132 having a shape substantially continuous with the holding recess 115 of the main body holding member 114 on the upper surface, and the RFID reader 134 is integrally mounted in the opening hole 133 at the center of the inner surface. The RFID reader 134 is formed, for example, as a chip component having a reader antenna (not shown) mounted on the surface thereof, and a reader support member so that the upper surface on which the reader antenna is located is substantially continuous with the inner surface of the support recess 132. 131 is installed in the opening hole 133.

  Moreover, the chemical injection device 100 according to this embodiment includes first and second antenna sheets 135 and 136. These antenna sheets 135 and 136 are formed in a structure corresponding to the RFID tag 230 from which the circuit chip 232 is omitted. In other words, the antenna sheets 135 and 136 are formed in an elongated resin sheet in which a planar loop antenna is formed in an elongated shape by printed wiring, and is mass-produced as an off-the-shelf product, like the RFID tag 230. The antenna sheets 135 and 136 and the RFID tag 230 are formed in, for example, a rectangle of 18 mm × 50 mm, and include an MM tag (product name) that performs wireless communication at a frequency of 13.56 MHz.

  In the chemical injection device 100 of the present embodiment, the first antenna sheet 135 is disposed on the left side of the inner surface of the support recess 132 with the longitudinal direction parallel to the left-right direction, and the outermost edge at the right end is the RFID reader. It is in close contact with the left outer edge of the upper surface of 134. The second antenna sheet 136 is arranged on the right side of the inner surface of the support recess 132 in a state where the longitudinal direction is parallel to the left-right direction, and the outermost edge portion of the left end thereof is in close contact with the right outer edge portion of the upper surface of the RFID reader 134. Yes. As described above, since the reader antenna of the RFID reader 134 is located on the upper surface, the reader antenna and the antenna sheets 135 and 136 are well electromagnetically coupled.

  Since the electromagnetic shielding sheet 137 having a predetermined shape is arranged on the upper surfaces of the RFID reader 134 and the antenna sheets 135 and 136 arranged as described above, the electromagnetic shielding sheet 137 allows the RFID reader 134 and the first sheet to be The upper surfaces of portions other than the left end of the antenna sheet 135 and portions other than the right end of the second antenna sheet 136 are shielded. This electromagnetic shielding sheet 137 is made of a material that shields electromagnetic induction, and specifically, can be made of a metal such as aluminum or ferrite.

  In the chemical injection device 100 according to this embodiment, due to the size and shape of the first and second antenna sheets 135 and 136, the reader support member 131, etc., as shown in FIG. The left end of the first antenna sheet 135 that is not shielded by the electromagnetic shielding sheet 137 is located on the left side of the syringe 200, and the second antenna sheet 136 that is not shielded by the electromagnetic shielding sheet 137 is located on the right side of the chemical syringe 200. The right edge of is located.

  Therefore, as will be described in detail later, when the chemical syringe 200 is appropriately attached to the injection head 110, the RFID tag 230 is parallel to the left end of the first antenna sheet 135 or the right end of the second antenna sheet 136. Oppositely electromagnetically coupled well. Since the first and second antenna sheets 135 and 136 are electromagnetically coupled to the RFID reader 134 as described above, the RFID tag 230 is electromagnetically coupled to the first or second antenna sheets 135 and 136 as described above. Then, the RFID tag 230 and the RFID reader 134 are electromagnetically coupled.

  Furthermore, in the chemical injection device 100 of the present embodiment, the outer edge portions of the first and second antenna sheets 135 and 136 and the inner edge portion of the through-hole 130 of the main body holding member 114 are separated by, for example, 3.0 mm or more at a spatial distance. Thus, the shape and arrangement of the leader support member 131 and the like are devised.

  Further, portions of the first and second antenna sheets 135 and 136 located outside the RFID reader 131 are disposed on the inner surface of the support recess 132 via a ferrite sheet 138 which is a sheet-like high magnetic permeability magnetic material. ing. A recess 139 corresponding to the thickness of the ferrite sheet 138, the antenna sheets 135, 136, and the electromagnetic shielding sheet 137 is formed on the inner surface of the supporting recess 132. It is flush with the inner surface.

  Since FIG. 6 is a schematic diagram, the outer peripheral surface of the chemical syringe 200 is drawn away from the surface of the electromagnetic shielding sheet 137 and the like, but the thickness of the RFID tag 230 and the like is actually negligible. Therefore, the liquid syringe 200 is held by the main body holding member 114 and the reader support member 131 in a state where the outer peripheral surface is in close contact with the holding recess 115 and the support recess 132.

  In the chemical injection device 100 of this embodiment, a piston drive mechanism 116 is mounted on the rear portion of the injection head 110. The piston drive mechanism 116 holds the piston flange 222 of the chemical syringe 200 and slides it in the front-rear direction. As shown in FIG. 8, the piston drive mechanism 116 has a drive motor 117 such as an AC (Alternating Current) motor as a drive source, and slides the piston member 220 by a ball screw mechanism (not shown) or the like.

  The piston drive mechanism 116 also includes a load cell 118. The load cell 118 detects the pressure that presses the piston member 220. A metal frame (not shown) elongated in the front-rear direction is disposed on the left and right sides of the head housing 113, and the piston drive mechanism 116 and the main body holding member 114 are connected to each other by the metal frame.

  As shown in FIG. 8, the injection control unit 101 connected to the injection head 110 having the above-described structure through the communication cable 102 has a built-in computer unit 140 and communicates with the imaging control unit 302 of the CT scanner 300. The network 304 is wired.

  As shown in FIG. 3, the injection control unit 101 includes an operation panel 103, a liquid crystal display 104 as a display device, a speaker unit 105, and the like arranged on the front surface of the main body housing 106, and a separate controller unit 107 is connected thereto. A cable 108 is used for wired connection.

As shown in FIG. 8, in the chemical injection device 100 of this embodiment, various devices such as the above-described RFID reader 134 are connected to a computer unit 140, and the computer unit 140 integrally controls the various devices. The computer unit 140 is a so-called one-chip microcomputer, and includes a CPU (Central Processing Unit) 141, a ROM (Read Only Memory) 142, and a RAM (Random
(Access Memory) 143, I / F (Interface) 144, and the like. In the computer unit 140, an appropriate computer program is mounted as firmware on an information storage medium such as the ROM 142, and the CPU 141 executes various processing operations corresponding to the computer program.

  The chemical injection device 100 according to the present embodiment logically includes an operation control unit 150 as shown in FIG. 9 by the operation of the computer unit 140 corresponding to the computer program implemented as described above. ing. The operation control means 150 logically has various means such as a data storage means 151, a data collation means 152, a warning output means 153, a data storage means 154, a data holding means 156, a display control means 157, and an injection control means 158. is doing.

  The operation control unit 150 corresponds to a function in which the CPU 141 executes a predetermined operation corresponding to the computer program installed in the ROM 142 or the like and the recording data wirelessly received from the RFID tag 230.

  The data storage unit 151 corresponds to a storage area of the RAM 143 recognized by the CPU 141 and stores predetermined confirmation conditions. The data collating unit 152 collates the stored confirmation conditions with the record data received wirelessly from the RFID tag 230. The warning output unit 153 outputs a confirmation warning corresponding to the collation result.

  More specifically, in the RAM 143, the identification data of the chemical syringe 200 that can be used is registered as a confirmation condition. When the RFID reader 134 wirelessly receives recording data from the RFID tag 230 of the chemical syringe 200, the wirelessly received identification data of the chemical syringe 200 is collated with the identification data registered in the RAM 143.

  If the wirelessly received identification data is not registered, a guidance message such as “This product is not registered as a usable syringe, please confirm that it can be used” is displayed on the LCD 104 as a confirmation warning. At the same time, sound is output from the speaker unit 105.

Further, the RAM 143 holds the current date and time updated as a confirmation condition every day. When the expiration date is received wirelessly from the RFID tag 230 of the chemical syringe 200, the expiration date and the current date and time are collated. If the current date and time has exceeded the expiration date, a guidance message such as “This product has expired. Please use a new product” is displayed on the LCD 104 as a confirmation warning and the speaker unit 105. Is output as audio.

  Further, in the prefilled type liquid syringe 200, the serial number for each individual is also recorded in the RFID tag 230, so that the data storage means 154 is mounted on the injection head 110 and the prefill type liquid syringe is executed. 200 serial numbers are stored.

  In this case, the data collating unit 152 collates the stored manufacturing number with the manufacturing number wirelessly received from the RFID tag 230, and the warning output unit 153 confirms that “the prefilled syringe is A guidance message such as “Use a new product that has been used in the past” is displayed on the liquid crystal display 104 as a confirmation warning and output from the speaker unit 105 as a sound.

  The data holding unit 156 holds recording data received wirelessly from the RFID tag 230. The display control unit 157 displays the stored recording data on the liquid crystal display 104. The injection control means 158 controls the operation of the piston drive mechanism 116 corresponding to the stored recording data.

  More specifically, the RFID tag 230 of the chemical syringe 200 includes various data such as the name, pressure resistance, and capacity of the chemical syringe 200, and the name, components, expiry date, etc. of the chemical solution filled in the chemical syringe 200. Are recorded in the RAM 143 and displayed on the liquid crystal display 104.

  Further, when the control data of the piston drive mechanism 116 is recorded in the RFID tag 230 of the chemical syringe 200, the control data is held in the RAM 143. The CPU 141 controls the operation of the piston drive mechanism 116 in accordance with the held control data. For example, when a variable pattern that changes the injection speed of the contrast agent with the passage of time is recorded in the RFID tag 230 of the chemical syringe 200, the CPU 141 changes the operating speed of the piston drive mechanism 116 over time corresponding to the variable pattern. Change.

  Further, when the pressure resistance is recorded in the RFID tag 230 of the chemical syringe 200, the CPU 141 controls the operation of the piston drive mechanism 116 so as not to exceed the pressure resistance held in the RAM 143 corresponding to the detected pressure of the load cell 118. To do. When the capacity is recorded in the RFID tag 230 of the chemical syringe 200, the CPU 141 controls the operation of the piston driving mechanism 116 in accordance with the capacity held in the RAM 143.

  The various means of the chemical solution injection device 100 as described above are realized by using hardware such as the liquid crystal display 104 as necessary. The main means are resources and computer programs stored in an information storage medium such as the ROM 142. Correspondingly, it is realized by the function of the hardware CPU 141.

  For example, when the recording data is wirelessly received by the RFID reader 134 from the RFID tag 230, such a computer program collates the confirmation condition stored in the RAM 143 or the like with the recording data wirelessly received from the RFID tag 230. In response to the collation result, a confirmation warning is output on the display of the liquid crystal display 104, the manufacturing number of the chemical syringe 200 that has been mounted and the injection operation has been executed is stored in the RAM 143, etc. The serial number and the serial number received wirelessly from the RFID tag 230, output a confirmation warning on the liquid crystal display 104 in accordance with the verification result, and the record wirelessly received from the RFID tag 230 The data is stored in the RAM 143 or the like, and the stored recording data is stored. An information storage medium such as a RAM 143 as software for causing the CPU 141 to execute processing operations such as displaying data on the liquid crystal display 104 and controlling the operation of the piston driving mechanism 116 in response to the stored recording data. Stored in

[Operation of the embodiment]
In the configuration as described above, when the chemical solution injection system 1000 of this embodiment is used, the injection head 110 of the chemical solution injection device 100 is arranged and used in the vicinity of the imaging unit 301 of the CT scanner 300 as shown in FIG. A chemical syringe 200 and the like are prepared. Then, the operator opens the movable holding member 123 of the injection head 110, attaches the chemical syringe 200 to the holding recess 115 so that the cylinder flange 213 is inserted therein, and closes the movable holding member 123.

  At this time, as described above, the chemical syringe 200 has a part of the cylinder flange 213 which is a pair of flat portions 215. Therefore, as shown in FIG. 2, FIG. 5, and FIG. The chemical solution syringe 200 is mounted on the chemical solution injection device 100 in an appropriate state where the flat portion 215 of the flange 213 is positioned up and down.

  Then, since the RFID tag 230 of the chemical syringe 200 is positioned on the right side or the left side, the electromagnetic tag 200 is favorably electromagnetically coupled facing the left end of the first antenna sheet 135 or the right end of the second antenna sheet 136 in parallel. . In the chemical injection device 100 of the present embodiment, the first and second antenna sheets 135 and 136 are electromagnetically coupled to the RFID reader 134, so that the first and second antenna sheets 135 and 136 are electromagnetically coupled as described above. The RFID tag 230 that performs wireless communication with the RFID reader 134.

  Then, in the chemical injection device 100 of this embodiment, as shown in FIG. 10, when the chemical syringe 200 is appropriately attached to the injection head 110 and the RFID reader 134 wirelessly receives the recording data from the RFID tag 230 (step S1). Then, the computer unit 140 determines whether or not the received data matches the confirmation condition registered in the RAM 143 (step S2).

  As the confirmation condition, since the identification data of the chemical syringe 200 that can be used is registered, if the identification data wirelessly received from the RFID tag 230 is not registered as the confirmation condition, “this product is registered as a usable syringe” A guidance message such as “Please check if it is not used” can be displayed on the liquid crystal display 104 as a confirmation warning and output by the speaker unit 105 (step S3).

  For this reason, for example, if a chemical syringe 200 that cannot be used with the chemical injection device 100 or a chemical syringe 200 that has expired is used, a confirmation warning is output, and various medical errors can be prevented well. can do. Further, when the identification data of the chemical syringe 200 matches the confirmation condition (step S2), the manufacturing number wirelessly received from the RFID tag 230 is compared with the manufacturing number registered in the RAM 143 (step S5).

  If the collated serial numbers match, a guidance message such as "This syringe has been used in the past. Please use a new product" will be output as a confirmation warning on the LCD 104 and the speaker unit 105 ( Step S3) It is possible to easily and reliably prevent medical mistakes and the like in which the chemical syringe 200 to be discarded after one use is used many times.

  On the other hand, the recorded data wirelessly received by the chemical injection device 100 from the RFID tag 230 of the appropriate chemical syringe 200 is, for example, “contrast syringe (name) made by (manufacturer)”. , “Chemical solution name˜, Chemical solution type˜, Volume˜, Pressure resistance˜,...” Etc. are displayed on the liquid crystal display 104 (step S6), so that the operator can easily and surely confirm various data such as the chemical syringe 200 to be used. can do.

  The RFID tag 230 records various data to be displayed and various data not to be displayed. For example, whether or not each data is to be displayed is set by a binary flag. The chemical injection device 100 displays an appropriate part from the record data received wirelessly from the RFID tag 230.

  Furthermore, the control data such as “pressure resistance”, “capacity”, and “variable pattern that changes the injection speed of the contrast agent over time” are recorded in the recording data wirelessly received from the RFID tag 230 of the chemical syringe 200 to the chemical injection device 100. If included, the control data is set in the RAM 143 of the computer unit 140 (step S7). When the control data is not set in the recording data wirelessly received from the RFID tag 230, default control data is set.

  As described above, when the chemical liquid syringe 200 attached to the chemical liquid injector 100 is connected to the subject by an extension tube (not shown) or the like and the operator inputs an operation start to the operation panel 103, the operation is performed. The detected chemical injection device 100 (step S8) transmits data of the work start to the CT scanner 300 (step S11).

  As shown in FIG. 12, the CT scanner 300 that has received the work start data from the chemical injection device 100 in this way (step T2) returns the work start to the chemical injection device 100 and executes an imaging operation (step T8). ). For this reason, in the chemical injection system 1000 of the present embodiment, the imaging of the CT scanner 300 follows the chemical injection of the chemical injection device 100.

  In the chemical injection system 1000 of this embodiment, as shown in FIGS. 10 and 12, when the chemical injection device 100 is ready as described above (steps S8 to S10), the start of imaging is input to the CT scanner 300. Even when operated (step T1), the chemical injection of the chemical injection device 100 follows the imaging of the CT scanner 300 (steps T4, T6˜, S9, S18˜). For this reason, in the chemical injection system 1000 according to the present embodiment, a fluoroscopic image can be taken at an accurate timing from a subject into which a contrast medium is injected at an appropriate timing.

  And in the chemical injection device 100 of this form, as shown in FIG. 11, when performing a series of chemical | medical solution injection | pouring operation | work (step S18-), elapsed time is measured from the injection start (step S19), the progress. The piston drive mechanism 116 is controlled in real time in accordance with the time and the control data wirelessly received from the RFID tag 230 (step S22).

  Furthermore, in the chemical injection device 100 of the present embodiment, for example, when a variable pattern that changes the injection speed of the contrast agent with the passage of time is recorded on the RFID tag 230 of the chemical syringe 200, the piston is driven corresponding to the variable pattern. The operating speed of the mechanism 116 is changed over time.

  Therefore, it is possible to maintain the optimum contrast level well, and to reduce the physical burden on the subject by reducing the injection volume of the contrast medium to the minimum necessary. However, it is not necessary to register a complicated variable pattern in advance in the drug solution injection device 100. For example, even with a new variable pattern corresponding to a new contrast agent, the drug solution injection device 100 can be easily used from the RFID tag 230 of the drug solution syringe 200. Can be entered.

  Furthermore, when the piston drive mechanism 116 is driven as described above, the stress detected by the load cell 118 is received in real time by the computer unit 140 (step S20). Then, the injection pressure of the chemical liquid is calculated from the detected stress of the load cell 118 corresponding to the viscosity of the chemical liquid wirelessly received from the RFID tag 230, the inner diameter of the cylinder member 210, and the like (step S21). The piston drive mechanism 116 is controlled in real time so as to satisfy the pressure range wirelessly received from (step S22).

  If the injection pressure becomes an abnormal pressure, a confirmation warning is output and the injection operation is forcibly stopped (step S23), so that it is possible to prevent a medical error in which the drug solution is injected with an abnormal pressure. Moreover, in order for the chemical injection device 100 to detect the pressure of the chemical solution as described above, not only the stress pressing the piston member 220 of the chemical solution syringe 200 but also various data such as the inner diameter of the cylinder member 210 and the viscosity of the chemical solution. Although necessary, such various data are input to the chemical liquid injector 100 by the RFID tag 230. For this reason, the chemical solution injection device 100 can accurately detect the injection pressure for each chemical solution together with the chemical solution syringe 200 without requiring a complicated operation of manually inputting various data into the chemical solution injection device 100 by the operator.

  In the chemical injection system 1000 according to the present embodiment, if the chemical syringe 200 is attached to the chemical injection device 100 with the flat portion 215 of the cylinder flange 213 positioned on the left and right, the RFID tag 230 is moved upward or downward. Will be located. When the RFID tag 230 is positioned above, the RFID tag 230 and the RFID reader 134 do not wirelessly communicate with each other because the RFID tag 230 is not adjacent to any of the first and second antenna sheets 135 and 136 in parallel (step S1).

  On the other hand, as shown in FIG. 6A, when the RFID tag 230 is positioned below, the RFID tag 230 is adjacent to the RFID reader 134 in parallel. However, since the electromagnetic shielding sheet 137 is positioned between the RFID tag 230 and the RFID reader 134 at that position, the RFID tag 230 and the antenna sheets 135 and 136 are not electromagnetically coupled, and the RFID tag 230 and the RFID reader are not coupled. There is no wireless communication with 134 (step S1). For this reason, in the chemical injection device 100 according to the present embodiment, the injection operation is executed in a state where the cylinder flange 213 is not properly held by the flange holding member 120, and the cylinder member 210 is automatically and reliably destroyed. Can be prevented.

  Even when the chemical syringe 200 is driven by the piston drive mechanism 116 as described above, the RFID tag 230 is always detected by the RFID reader 134 (step S18). If the above detection is interrupted (step S18) before the injection operation is completed (step S32), the injection operation by the piston drive mechanism 116 is stopped (step S28).

  In addition, a guidance message such as “Syringe omission detected.-Please confirm the syringe installation” is displayed on the liquid crystal display 104 as a confirmation warning, and a sound is output from the speaker unit 105 (step S26). The injection stop is transmitted to the CT scanner 300 (steps S25 and S28).

  When the CT scanner 300 receives the occurrence of abnormality (step T10), the abnormality occurrence is output as a confirmation warning on a guidance display or the like (step T16). When the operation stop is received (step T13), the imaging operation is stopped. (Step T18).

  For this reason, in the chemical injection system 1000 of this embodiment, it is possible to automatically prevent the chemical injection from being executed in a state where the chemical syringe 200 is not properly held, and the chemical syringe 200 is appropriate during the chemical injection. Even in the case of dropping off from the position, the liquid injection can be automatically stopped.

  In addition, the mechanism for detecting the appropriate mounting of the chemical syringe 200 is formed by the RFID tags / readers 230 and 130 for transferring various data from the chemical syringe 200 to the chemical injection device 100. Appropriate mounting of the chemical syringe 200 can be detected with a simple structure without requiring a sensor mechanism or the like.

  In particular, when the chemical syringe 200 is appropriately attached to the chemical injection device 100, it is arbitrary whether the RFID tag 230 is positioned on the right side or the left side, but the first or second position is determined regardless of where the RFID tag 230 is positioned. The RFID reader 134 can be electromagnetically coupled via the antenna sheets 135 and 136.

  Further, the first and second antenna sheets 135 and 136 for detecting the RFID tag 230 on both the left and right sides in this way are off-the-shelf products that are mass-produced together with the RFID tag 230, and the main body holding member 114 is not modified. Only the hole 130 is formed. Therefore, the chemical injection device 100 of this embodiment has good productivity.

  It should be noted that the chemical injection device 100 and the CT scanner 300 according to the present embodiment may detect the occurrence of abnormality in the above-described ready state (steps S10 and T3), or may detect occurrence of abnormality during the execution of the operation. (Steps S23 and T9), the occurrence of the abnormality is output (Steps S26 and T16), and the operation is stopped (Steps S28 and T18).

  Further, since the occurrence of the abnormality is also transmitted to the other side (steps S25, T15), the occurrence of the abnormality is also output (steps T16, S26) on the other side (steps T10, S24). In addition, since one operation stop is also transmitted to the other (steps S27, T17), the other operation that received the data (steps T13, S31) executes the operation stop (steps T18, S28).

  When an operation stop is input on one side (steps S29 and T11), the operation stop is executed (steps S28 and T18) and also transmitted to the other side (steps S27 and T17). On the other side of receiving the data (steps T13 and S31), the operation is stopped (steps T18 and S28).

  When the operation completion is detected on the one hand (steps S32 and T14), the operation end is executed (steps S33 and T19), and the operation end is transmitted to the other side (steps S34 and T20). On the other hand, when the data is received (steps T12 and S31), the operation is stopped (steps T18 and S28).

  In the chemical injection device 100 of this embodiment, when the injection operation is completed normally or abnormally as described above (steps S33 and S28), the identification data wirelessly received from the RFID tag 230 of the chemical syringe 200 is a new confirmation condition. Is registered in the RAM 143 (step S36).

  In the chemical injection device 100 of the present embodiment, the RFID reader 134 and the first and second antenna sheets 135 and 136 are mounted on the resin-made reader support member 131 and are fixed from the metal main body holding member 114. Since it is separated to the spatial distance, the electromagnetic coupling between the RFID reader 134 and the RFID tag 230 via the first and second antenna sheets 135 and 136 is not hindered by the metal main body support member 114.

  Moreover, since the ferrite sheet 138 is attached to the lower surfaces of the first and second antenna sheets 135 and 136, the electromagnetic field below the first and second antenna sheets 135 and 136 passes through the ferrite sheet 138. Thus, the electromagnetic coupling between the RFID tag 230 and the antenna sheet 131 is not hindered by the metal main body support member 114.

  Further, a recess 139 corresponding to the thickness of the various sheets 135 to 138 is formed on the surface of the reader support member 131, and the upper surface of the electromagnetic shielding sheet 137 and the inner surface of the support recess 132 are flush with each other. Therefore, holding | maintenance of the chemical | medical solution syringe 200 is not inhibited by the thickness of the various sheets 135-138.

  Note that the tag antenna 233 of the RFID tag 230 according to the present embodiment is formed as an elongated loop antenna, and therefore communication performance is extremely lowered when the tag antenna 233 is bent in the longitudinal direction. However, since the longitudinal direction of the cylinder member 210 and the RFID tag 230 is the same in the chemical syringe 200 of this embodiment, the tag antenna 233 is curved slightly in the short direction but is curved in the longitudinal direction. Communication performance is good.

  Further, although the RFID tag 230 has a communication performance hindered by liquid, the RFID tag 230 needs to be attached to the cylinder member 210 in a state where the longitudinal direction coincides with the liquid as described above. It is difficult to place the RFID tag 230 at a position where it is not.

  However, in the chemical syringe 200 of this embodiment, the cylinder member 210 is formed with a sufficient thickness of about 1.5 mm to 2.0 mm, so the RFID tag 230 attached to the surface is filled in the cylinder member 210. Wireless communication can be satisfactorily performed without being inhibited by the chemical solution.

[Modification of Embodiment]
The present invention is not limited to the above embodiment, and various modifications are allowed without departing from the scope of the present invention. For example, in the above embodiment, the chemical syringe 200 is formed to be vertically symmetrical and bilaterally symmetric, and the RFID tag 230 is positioned on the left or right side in a state where the chemical syringe 200 is properly mounted.

  However, by sticking stickers with guidance messages such as “Please use this as the upper side” and “Do not use this as the upper side” to the outer peripheral surface of the cylinder body 211 (not shown) The liquid syringe 200 may be defined such that one of the pair of flat portions 215 is on the upper side and the other is on the lower side.

  In this case, for example, the RFID tag 230 is attached to the left of the outer peripheral surface of the cylinder body 211 of the chemical syringe 200 whose vertical direction is regulated, and the right second antenna sheet 136 is attached to the chemical injector 100. Only the left first antenna sheet 135 can be bonded to the RFID reader 134 without being attached (not shown).

  In such a chemical injection system (not shown), even if the chemical syringe 200 is mounted on the injection head 110 with the flat portion 215 of the cylinder flange 213 positioned up and down, if the chemical syringe 200 is upside down, RFID is used. Since the tag 230 and the RFID reader 134 do not wirelessly communicate with each other, it is possible to prevent the injection operation from being performed while the chemical syringe 200 is upside down. Of course, it is also possible to reverse the right and left of the above-described configuration (not shown).

  Moreover, when the up-down direction of the chemical | medical solution syringe 200 is prescribed | regulated as mentioned above, for example, the convex part is formed in at least one of the front surface and the rear surface of the holding slit of the fixed holding member, and the convex part is formed on the cylinder flange. It is also possible to engage with a recess formed only in the lower part of at least one of the front and rear surfaces (not shown). In this case, even when the flat portion of the cylinder flange is positioned up and down, the chemical syringe is not attached to the chemical injection device in the opposite state.

  Furthermore, when the vertical direction of the chemical syringe 200 is defined as described above, for example, a pattern that has a predetermined shape when viewed from above via a cylinder member 210 filled with a transparent chemical solution is a cylinder. It is also possible to divide and represent the lower surface of the member 210 and the inner surface of the holding recess 115 of the main body holding member 114 (not shown). In this case, it can be confirmed by both the RFID reader 134 and the above-mentioned pattern whether the chemical syringe whose vertical direction is regulated is properly held, and the cylinder member 210 is filled with the chemical solution. Moreover, it can be confirmed by the design.

  Moreover, in the said form, antenna sheet | seats 135 and 136 were shielded with the electromagnetic shielding sheet | seat 137 except the part which opposes the RFID tag 230 of the chemical | medical solution injection device 200 with which the chemical | medical solution injection apparatus 100 was mounted | worn appropriately. However, the electromagnetic shielding sheet 137 can be omitted.

  In this case, since the RFID tag 230 can wirelessly communicate with the RFID reader 134 as long as it is located in the lower half of the chemical syringe 200, the cylinder flange 213 holds the flange at a specific rotational position around the axial center of the chemical syringe 200. It is difficult to detect whether the member 121 is held.

  In other words, it is unnecessary to detect whether or not the chemical syringe is held at a specific rotational position centered on the axis, and the RFID tag is to be wirelessly communicated with the RFID reader in a state where the RFID tag is located in the lower half of the chemical syringe. Then, as described above, it is preferable to omit the electromagnetic shielding sheet 137 and expose the first and second antenna sheets 135 and 136 (not shown).

  Further, in the above embodiment, the reader antenna is located on the upper surface of the RFID reader 134, and the first and second antenna sheets 135 and 136 are in close contact therewith and are well electromagnetically coupled. However, a reader antenna can be positioned on the lower surface of the RFID reader 134 if electromagnetic coupling is well realized.

  Further, in the above embodiment, the first and second antenna sheets 135 and 136 are both in close contact with the upper surface of the RFID reader 134 from above. However, as long as electromagnetic coupling is satisfactorily realized, the lower surfaces of the end portions of the first and second antenna sheets 135 and 136 and the upper surface of the RFID reader 134 may be spaced apart from each other ( Not shown).

  Further, the end portions of the first and second antenna sheets 135 and 136 are bent downward so as to face the side surface of the RFID reader 134, and the end portions of the first and second antenna sheets 135 and 136 are It is not impossible (not shown) to be bent in a crank shape and to face the side surface and the lower surface of the RFID reader 134.

  In the above embodiment, because of the relationship between the shape and size of the holding recess 115 and the first and second antenna sheets 135 and 136, the outermost edge at the right end of the first antenna sheet 135 is formed on the left outer edge of the upper surface of the RFID reader 134. The left end of the first antenna sheet 135 and the right end of the second antenna sheet 136 are appropriately held by bringing the outermost part of the second antenna sheet 136 into close contact with the right outer edge. It illustrated having been located in the right and left of the chemical | medical solution syringe 200 made.

  However, when the antenna sheets 135 and 136 are longer than the desired size and the left end of the first antenna sheet 135 and the right end of the second antenna sheet 136 are positioned above the desired position in the above-described joining structure, For example, as shown in FIG. 13, it is preferable that the entire right end of the first antenna sheet 135 is in close contact with the entire upper surface of the RFID reader 134 and the entire left end of the second antenna sheet 136 is in close contact. .

  Moreover, in the said form, it illustrated that the resin-made leader support members 131 were formed as one independent component. However, like the injection head 161 of the chemical injection device 160 of the chemical injection system 1100 illustrated in FIG. 14, the resin-made leader support member 162 and the head housing 163 may be integrally formed.

  Furthermore, in the said form, since the freedom degree of the shape of the resin-made leader support members 131 was favorable, it illustrated forming the recessed part 139 in which the various sheets 135-137 are located in the surface. However, since the thicknesses of the various sheets 135 to 137 are practically negligible, the recess 139 as described above can be omitted.

  Moreover, although the chemical | medical solution injection apparatus 100 with which only one chemical | medical solution syringe 200 was mounted | worn with the injection | pouring head 110 was illustrated in the said form, as shown in FIG. 15, the chemical | medical solution injection | pouring with which several chemical | medical solution syringes 200 are mounted | worn as shown in FIG. An apparatus (not shown) can also be implemented.

  Further, in the above embodiment, the recording data detected by the RFID reader 134 from the RFID tag 230 is displayed on the liquid crystal display 104 of the injection control unit 101 separate from the injection head 110. However, as shown in FIG. 15, it is also possible to mount a display device 171 such as a liquid crystal display on the injection head 170 and display the recording data of the RFID tag 230 there.

  In this case, when the liquid syringe 200 is properly attached to the injection head 170, the recorded data is displayed on the display device 171 of the injection head 170, so that the operator can quickly determine whether the liquid syringe 200 is appropriately attached. The display data can be recognized intuitively.

  In the above embodiment, the fixed holding member 122 of the pair of left and right flange holding members 121 is illustrated as being separated from the left and right together with the movable holding member 123. However, for example, it is also possible that the left and right fixed holding members are integrally connected at the bottom and only the movable holding member 123 is separated to the left and right (not shown), as shown in FIG. It is also possible to form the main body holding member 174 integrally with only the fixed holding member 173 that does not move.

  Further, as shown in FIG. 16, a pair of left and right flange holding members 121 are supported by a dedicated metal frame 180 to unitize the flange holding mechanism 181, and the flange holding mechanism 181 is used as a resin main body holding member 182. It is also possible to connect the RFID reader 134, the first and second antenna sheets 135, 136, and the like directly to the main body holding member 182 while being connected to the rear end.

  Moreover, in the said form, it illustrated that the RFID tag 230 was mounted | worn with the cylinder member 210 in the state in which a longitudinal direction corresponds. However, for example, it is not impossible to mount the RFID tag 230 on the outer peripheral surface of the cylinder member 210 so as to be wound in the longitudinal direction (not shown).

  Furthermore, in the above embodiment, the entire cylinder member 210 is illustrated as being thick enough that the chemical solution does not inhibit the electromagnetic induction of the RFID tag 230. However, for example, when the thickness of the cylinder member is not sufficient, it is also possible to form only a portion where the RFID tag 230 is attached to a predetermined thickness, and the RFID tag 230 is provided via a resin pedestal or the like. It is also possible to attach to the cylinder member (both not shown).

  It is also possible to form a magnetic material with high permeability such as ferrite in the form of a sheet having substantially the same shape as the RFID tag 230, and arrange the RFID tag 230 on the outer peripheral surface of the cylinder member 210 via this magnetic material. (Not shown). In this case, since the electromagnetic field on the back side of the RFID tag 230 passes through the magnetic material, the electromagnetic field can be prevented from being absorbed by the chemical solution, and the communication performance of the RFID tag 230 can be improved.

  Furthermore, in order to simplify the description in the above embodiment, it is assumed that the size of the chemical liquid syringe 200 attached to the chemical liquid injector 100 is one. However, in the chemical injection system implemented by the present inventor, the chemical syringe 200 has a plurality of sizes, and as shown in FIG. 17, a cylinder adapter 400 is prepared for each chemical syringe 200 of a size other than the maximum. Yes.

  In such a chemical solution injection system, the chemical solution syringe 200 having the maximum size is directly attached to the chemical solution injection device 100, and the chemical solution syringe 200 having a size other than the maximum size is attached via the cylinder adapter 400. Therefore, when the cylinder adapter 400 is appropriately attached to the chemical solution injector 100, the left and right outer surfaces and inner surfaces of the cylinder adapter 400 facing the left end of the first antenna sheet 135 or the right end of the second antenna sheet 136 in parallel are arranged. Alternatively, the RFID tag 230 can be attached.

  In this case, the chemical injection device 100 can check whether both the cylinder adapter 400 and the chemical syringe 200 are properly attached, and collates the recorded data of the cylinder adapter 400 with the recorded data of the chemical syringe 200. Thereby, it can also be confirmed whether the combination of the chemical | medical solution syringe 200 and the cylinder adapter 400 is appropriate.

  Moreover, since the RFID reader 134 for the MM tag can wirelessly communicate with the plurality of RFID tags 230, the chemical liquid injector 100 can be connected to the RFID tag 230 of both the cylinder adapter 400 and the chemical syringe 200 with one RFID reader 134. Wireless communication is possible.

  In the chemical solution injection system as described above, the RFID tag 230 of the chemical solution syringe 200 and the first and second antenna sheets 135 and 136 of the chemical solution injection device 100 face each other via the cylinder adapter 400. The cylinder adapter 400 is preferably formed of a non-magnetic material such as resin that does not hinder wireless communication between the RFID tag 230 and the RFID reader 134.

  Further, in the above embodiment, in order to restrict the use of the chemical syringe 200 and the like at one time, the chemical injection device 100 wirelessly receives and stores the manufacturing number for each individual from the RFID tag 230 of the chemical syringe 200 used by the RFID reader 134. An example of outputting a confirmation warning when a newly received serial number is stored is shown.

  However, the RFID tag 230 of the chemical syringe 200 is set as a product in which data can be additionally recorded, and the chemical injection device 100 records the used information in the RFID tag 230 of the chemical syringe 200 that has been mounted and the injection operation has been executed. It is also possible to output a confirmation warning when used is received wirelessly from the RFID tag 230 of the chemical syringe 200.

  In this case, since it is not necessary to register an enormous production number in the chemical injection device 100, it is possible to prevent the RAM 143 from overflowing, and it is not necessary to mount an unnecessarily large-capacity RAM 143 or the like. Moreover, even if the stored data of the chemical liquid injector 100 is illegally reset, illegal repeated use of the chemical liquid syringe 200 can be prevented.

  Furthermore, in the above embodiment, the chemical liquid injection control data and the like are also received wirelessly from the RFID tag 230 of the chemical syringe 200 to the chemical liquid injection device 100, and the chemical liquid injection device 100 only controls the chemical liquid injection operation corresponding to the control data. Illustrated. However, it is also possible to control the chemical injection operation corresponding to the combination of the control data wirelessly received by the chemical injection device 100 from the RFID tag 230 of the chemical syringe 200 and the control data input from the operation panel 103 or the like. It is.

  For example, as described above, a time-varying pattern of chemical solution injection is recorded in the RFID tag 230 of the chemical syringe 200, and when an imaging region by the CT scanner 300 is input through the operation panel 103 or the like, the imaging region is displayed. Correspondingly, the variable pattern can be adjusted.

  In the above embodiment, it is assumed that the chemical injection device 100 that has registered the manufacturing number wirelessly received from the RFID tag 230 of the chemical syringe 200 after completing the injection operation ends various operations. When the chemical injection device 100 that has completed the operation and data registration of the manufacturing number detects the removal of the chemical syringe 200 by the RFID reader 134, the piston drive mechanism 116 can be automatically retracted to the final initial position. is there.

  Further, when the chemical injection device 100 that has completed the various operations and retracted the piston drive mechanism 116 to the initial position detects the mounting of the new chemical syringe 200 by the RFID reader 134, it is prepared to hold the piston member 210. It is also possible to automatically advance the piston drive mechanism 116 to the position.

  In these cases, since the piston drive mechanism 116 is automatically arranged at an appropriate position by attaching / detaching the chemical syringe 200 to / from the chemical injection device 100 at an appropriate timing, no special operation is required for this arrangement. The convenience of the chemical injection device 100 can be further improved.

  In the above embodiment, it is assumed that the manufacturer records various data in the RFID tag 230 of the chemical syringe 200. For example, the RFID tag of the chemical syringe 200 in a medical site such as a hospital that uses the chemical syringe 200 or the like. It is also possible to record various data in 230.

  In this case, since desired data can be given to the medical solution syringe 200 at a medical site, for example, when filling a desired medical solution into the post-filling type medical solution syringe 200, various data of the medical solution are recorded by the RFID tag 230. It becomes possible. Even in such a case, for example, as described above, it is preferable that the manufacturing number for preventing repeated use of the drug solution syringe 200 is fixedly recorded in advance on the RFID tag 230.

  Furthermore, in the above embodiment, only the case where the chemical liquid injection device 100 pushes the piston member 220 into the cylinder member 210 of the chemical liquid syringe 200 in order to inject the chemical liquid to the subject is illustrated, but for example, a separate chemical liquid pack is connected by an extension tube. By extracting the piston member 220 from the cylinder member 210, the chemical liquid injector 100 can fill the chemical liquid syringe 200 with the chemical liquid (not shown).

  In the above embodiment, the CT scanner 300 is used as the fluoroscopic imaging device, and the chemical injection device 100 injects the CT contrast agent. However, for example, it is also possible to use an MRI apparatus, a PET apparatus, or the like as a fluoroscopic imaging apparatus and inject a contrast agent for the MRI apparatus or PET apparatus.

  Furthermore, although each part of the chemical injection device 100 and the like has been specifically described in the above embodiment, these parts can be variously modified. For example, the drive source of the piston drive mechanism is a DC (Direct Current) motor or an ultrasonic motor. It is also possible that the display device is formed of a linear motor or a solenoid, the display device is formed of an EL (Electro-Luminescence) display or a plasma display, etc. (not shown).

  In the above embodiment, the CPU 141 is operated corresponding to the computer program stored in the RAM 143 or the like, and various means are logically realized as various functions of the chemical liquid injector 100. However, each of these various means can be formed as unique hardware, and a part can be stored in the RAM 143 or the like as software and a part can be formed as hardware.

Claims (15)

A liquid syringe in which a piston member is slidably inserted into a cylinder member having a cylinder flange formed on the outer periphery of the rear end of the cylinder body, and a liquid medicine is injected into a subject by pushing the piston member into the cylinder member of the liquid syringe. A chemical liquid injection system comprising:
The chemical liquid syringe has an RFID (Radio) that wirelessly transmits recording data by electromagnetic induction while the cylinder flange is formed in a vertically symmetrical and left-right symmetric structure.
Frequency Identification) tag is mounted on the outer peripheral surface of the cylinder body,
The chemical injection device is supported by a metal main body holding member provided with a holding recess for holding the cylinder main body inserted from above with an axial direction parallel to the front-rear direction, and the main body holding member. A metal flange holding member that holds the cylinder flange inserted from above at a specific rotational position where the vertically symmetrical structure portion is positioned vertically, and the cylinder body held together with the cylinder flange A piston driving mechanism that pushes the piston member into the RFID reader, an RFID reader that wirelessly receives the recording data of the RFID tag by electromagnetic induction, and an operation control unit that controls the operation of the piston driving mechanism in response to the wireless reception of the recording data A first and second antenna sheet having an elongated loop antenna, and an electric circuit for blocking the electromagnetic induction And shielding sheet has an a reader supporting member nonconductive and nonmagnetic support recess shaped to substantially continuously is formed in the holding recess,
Wherein the liquid syringe, wherein the RFID tag is arranged at a position on the side of the cylinder member held by the flange holding member at said specific rotational position,
In the chemical injection device, a through hole facing the RFID tag is formed in the main body holding member in a shape continuous from the left to the right of the held chemical syringe, and the support recess is formed in the holding recess. The reader support member is mounted in the through hole in a substantially continuous state, the upper surface of the RFID reader is located at the center of the inner surface of the support recess of the reader support member, and the longitudinal direction is parallel to the left-right direction The right end of the first antenna sheet disposed on the left side of the inner surface of the support recess faces the RFID reader, and is disposed on the right side of the inner surface of the support recess with the longitudinal direction parallel to the left-right direction. The left end of the second antenna sheet is opposed to the RFID reader, and the RFID reader and a portion other than the left end of the first antenna sheet are connected to the second antenna sheet. Liquid injection system the upper surface of the right end than the portion of Nashito is shielded by the electromagnetic shielding sheet. A chemical syringe in which a piston member is slidably inserted into a cylinder member in which a cylinder flange is formed on the outer periphery of the rear end of the cylinder body, and the piston member is press-fitted into the cylinder member of the chemical syringe so that the chemical is applied to the subject. A chemical injection device having a chemical injection device for injection,
The chemical syringe has the cylinder flange formed in a vertically symmetrical and left-right symmetrical structure, and an RFID tag for wirelessly transmitting recorded data by electromagnetic induction is mounted on the outer peripheral surface of the cylinder body.
The chemical injection device includes a non-conductive and non-magnetic main body holding member provided with a holding recess for holding the cylinder main body inserted from above with an axial direction parallel to the front-rear direction, and the main body holding A metal flange holding member that is connected to a member and that is inserted from above is held at a specific rotational position where a portion of the vertically symmetrical structure is positioned vertically, and is held together with the cylinder flange. A piston driving mechanism that pushes the piston member into the cylinder body, an RFID reader that wirelessly receives the recording data of the RFID tag by electromagnetic induction, and an operation of the piston driving mechanism corresponding to the wireless reception of the recording data. Operation control means for controlling, first and second antenna sheets having an elongated loop antenna, and the electromagnetic induction Has an electromagnetic shielding sheet, a for blocking,
Wherein the liquid syringe, wherein the RFID tag is arranged at a position on the side of the cylinder member held by the flange holding member at said specific rotational position,
In the chemical injection device, the upper surface of the RFID reader is located on the bottom surface of the holding recess of the main body holding member, and the first side is arranged on the left side of the inner surface of the holding recess with the longitudinal direction parallel to the left-right direction. The right end of the first antenna sheet faces the RFID reader, and the left end of the second antenna sheet disposed on the right side of the inner surface of the holding recess with the longitudinal direction parallel to the horizontal direction is the RFID reader. A chemical injection system in which the upper surfaces of the RFID reader, a portion other than the left end of the first antenna sheet, and a portion other than the right end of the second antenna sheet are shielded by the electromagnetic shielding sheet.   The chemical solution injection system according to claim 1, wherein the antenna sheet is disposed on an inner surface of the support recess via a sheet-like magnetic body.   The chemical solution injection system according to claim 2, wherein the antenna sheet is disposed on an inner surface of the holding recess via a sheet-like magnetic body.   The chemical injection system according to any one of claims 1 to 4, wherein the RFID tag is disposed on an outer peripheral surface of the cylinder body via a sheet-like magnetic body.   The chemical injection system according to any one of claims 3 to 5, wherein the magnetic body is ferrite. The RFID tag is formed in a substantially rectangular sheet shape,
The chemical injection system according to any one of claims 1 to 6, wherein the antenna sheet has a structure in which a loop antenna is formed on a substantially rectangular sheet.   The figure which becomes a predetermined shape when viewed from above through the cylinder member filled with a transparent chemical solution is divided into a lower surface of the cylinder member and an inner surface of the holding recess. The chemical injection system according to any one of 1 to 7. The flange holding member has a holding slit in which a convex portion is formed on at least one of a front surface and a rear surface for holding a cylinder flange of the chemical syringe inserted from above and from the front and back.
The chemical solution according to any one of claims 1 to 8, wherein a concave portion is formed on at least one of the front surface and the rear surface of the cylinder flange so that the convex portion engages at a specific rotational position centered on an axis. Injection system.   10. The chemical liquid injection system according to claim 1, wherein the operation control unit permits the operation of the piston drive mechanism only when the RFID reader detects an RFID tag of the chemical liquid syringe. 11. The said chemical | medical solution syringe is a chemical | medical solution injection | pouring system as described in any one of Claim 1 thru | or 10 containing a prefilled type chemical | medical solution syringe. A piston member is slidably inserted into a cylinder member having a cylinder flange formed on the outer periphery of the rear end of the cylinder body, and the cylinder flange is formed in a vertically symmetrical and left-right symmetric structure. RFID (Radio for wireless transmission)
(Frequency Identification) tag is mounted on the outer peripheral surface of the cylinder body, and the chemical syringe is mounted so that the RFID tag is disposed at a side position of the cylinder member, and the piston member is mounted on the cylinder member. A chemical injection device that pushes and injects a chemical into a subject,
A metal main body holding member provided with a holding recess for holding the cylinder main body inserted from above in a state where the axial direction is parallel to the front-rear direction;
A metal flange holding member that is supported by the main body holding member and that holds the cylinder flange inserted from above at a specific rotational position where the vertically symmetrical structure portion is positioned vertically ; and
A piston drive mechanism for pushing the piston member into the cylinder body held together with the cylinder flange;
An RFID reader for wirelessly receiving the recording data of the RFID tag by electromagnetic induction;
Operation control means for controlling the operation of the piston drive mechanism in response to wireless reception of the recording data;
First and second antenna sheets having an elongated loop antenna;
An electromagnetic shielding sheet for shielding the electromagnetic induction;
A non-conductive and non-magnetic reader support member in which a support recess having a shape substantially continuous with the holding recess is formed, and
In the chemical syringe, the RFID tag is arranged at a side position of the cylinder member held by the flange holding member at the specific rotation position,
A through-hole facing the RFID tag is formed in the main body holding member in a shape that continues from the left to the right of the held liquid medicine syringe,
The reader support member is mounted in the through hole of the main body holding member in a state where the support recess is substantially continuous with the holding recess,
The upper surface of the RFID reader is located at the center of the inner surface of the support recess of the reader support member,
The right end of the first antenna sheet disposed on the left side of the inner surface of the support recess with the longitudinal direction parallel to the left-right direction faces the RFID reader,
The left end of the second antenna sheet disposed on the right side of the inner surface of the support recess with the longitudinal direction parallel to the left-right direction faces the RFID reader,
A chemical injection device in which upper surfaces of the RFID reader, a portion other than the left end of the first antenna sheet, and a portion other than the right end of the second antenna sheet are shielded by the electromagnetic shielding sheet. A piston member is slidably inserted into a cylinder member having a cylinder flange formed on the outer periphery of the rear end of the cylinder body, and the cylinder flange is formed in a vertically symmetrical and left-right symmetric structure. RFID (Radio for wireless transmission)
(Frequency Identification) tag is mounted on the outer peripheral surface of the cylinder body, and the chemical syringe is mounted so that the RFID tag is disposed at a side position of the cylinder member, and the piston member is mounted on the cylinder member. A chemical injection device that pushes and injects a chemical into a subject,
A non-conductive and non-magnetic body holding member provided with a holding recess for holding the cylinder body inserted from above with the axial direction parallel to the front-rear direction;
A metal flange holding member which is connected to the main body holding member and holds the cylinder flange inserted from above at a specific rotational position where the vertically symmetrical structure portion is positioned vertically ; and
A piston drive mechanism for pushing the piston member into the cylinder body held together with the cylinder flange;
An RFID reader for wirelessly receiving the recording data of the RFID tag by electromagnetic induction;
Operation control means for controlling the operation of the piston drive mechanism in response to wireless reception of the recording data;
First and second antenna sheets having an elongated loop antenna;
An electromagnetic shielding sheet for shielding the electromagnetic induction,
In the chemical syringe, the RFID tag is arranged at a side position of the cylinder member held by the flange holding member at the specific rotation position,
The upper surface of the RFID reader is located on the bottom surface of the holding recess of the main body holding member,
The right end of the first antenna sheet arranged on the left side of the inner surface of the holding recess with the longitudinal direction parallel to the left-right direction faces the RFID reader,
The left end of the second antenna sheet disposed on the right side of the inner surface of the holding recess in a state where the longitudinal direction is parallel to the left-right direction faces the RFID reader,
A chemical injection device in which upper surfaces of the RFID reader, a portion other than the left end of the first antenna sheet, and a portion other than the right end of the second antenna sheet are shielded by the electromagnetic shielding sheet. The RFID tag is formed in a substantially rectangular sheet shape,
The chemical injection device according to claim 12 or 13 , wherein the antenna sheet has a structure in which a loop antenna is formed on a substantially rectangular sheet. The chemical injection device according to any one of claims 12 to 14, wherein the chemical syringe includes a prefilled type chemical syringe.

Images