JP5063591B2 - 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 having a drive motor, a slider mechanism, and the like, 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, and a conduit portion is formed at the center of the closed front end. The rear end of the cylinder body is opened, and a piston member is inserted into the inside from the opening. An annular cylinder flange is formed on the outer periphery of the rear end of the cylinder body.

  Such a chemical syringe includes a prefilled type and a post-filling type. The prefilled type is shipped in a state where the cylinder member is filled with a chemical solution and the whole is sealed with a packing material. In the post-filling type, 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 of 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, the chemical injection device press-fits the piston member into the cylinder member by the piston drive mechanism in response to a predetermined operation. Thereby, a chemical | medical solution will be inject | poured into a test subject from a chemical | medical solution syringe.

  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, after inject | pouring a contrast agent into a test subject according to input data, a chemical | medical solution injection | pouring apparatus will also inject physiological saline automatically. 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 configured to hold a circular portion that is not a flat portion of the cylinder flange with 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 faces 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 data input such as the injection rate of the chemical solution to the chemical injection device is necessary depending on the imaging region, the weight, etc. of the subject, and 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). However, it is easy to input such a variable pattern to 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 in the cylinder member so that sliding is possible from the 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 an RFID tag mounted on the outer peripheral surface of the cylinder body. The RFID tag includes a circuit chip and a planar loop antenna connected to the circuit chip, and wirelessly transmits recording data by electromagnetic induction.

  The chemical injection device has a main body holding member, a flange holding member, a piston drive mechanism, an RFID reader, an operation control means, and an antenna sheet. The main body holding member is made of metal and holds the cylinder main body inserted from above by the holding recess. The flange holding member is made of metal and supported by the main body holding member, and holds the cylinder flange inserted from above. 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.

A through hole is formed in the main body holding member from the outer surface to the inner surface of the holding recess. The RFID reader is arranged at a position adjacent to the through hole on the outer surface of the holding recess. Antenna sheet being inserted into the through hole of the holding recess, one end, Oite the inner surface of the holding recess, with the liquid syringe is properly mounted RFID tags are arranged at a position opposed to the liquid injector The other end faces the RFID reader .

  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.

  In the chemical injection system of the present invention, for example, the RFID tag can be made to face the one end of the antenna sheet in parallel by appropriately attaching the chemical syringe to the chemical injection device. By using the antenna sheet, it is possible to easily and reliably detect whether or not the chemical syringe is properly attached to the chemical injection device.

  The various means referred to in the present invention only have to 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, a computer It can be realized as a predetermined function implemented in the data processing apparatus by a 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.

  Further, in the present invention, the front-rear and up-down 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 one end, the other end, the left end, and the right end of the antenna sheet according to the present invention mean a portion from the outermost edge in the longitudinal direction to an arbitrary range, for example, a substantially square portion. good.

It is a typical vertical side view of the principal part which shows the state by which a chemical | medical solution syringe is mounted | worn with the injection | pouring head of the chemical | medical solution injection device 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 a block diagram which shows the circuit structure of a chemical injection system. It is a perspective view which shows the external appearance of a chemical | medical solution syringe. It is a typical perspective view which shows the external appearance of a RFID tag. 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 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 perspective view which shows the modification of an injection head. 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 with the modification of a chemical | medical solution injection system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Chemical injection device 110,170 Injection head 114,174 Main body holding member 115 Holding recessed part 116 Piston drive mechanism 121,173 Flange holding member 130 RFID reader 131 Antenna sheet 133 Through-hole 135 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 Chemical injection system

[Configuration of the embodiment]
Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, the chemical injection system 1000 of this embodiment includes a chemical injection device 100, a chemical syringe 200, and a CT scanner 300 that is a fluoroscopic imaging device, which will be described in detail later. A fluoroscopic image is taken from a subject (not shown) who injects a medical solution such as a contrast medium.

  As shown in FIGS. 4 and 5, the CT scanner 300 includes a fluoroscopic imaging unit 301 and an imaging control unit 302. 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 FIGS. 2 and 6, 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 solution injection system 1000 of this embodiment, at least a part of the chemical solution syringe 200 used is a prefilled type. The prefilled type chemical syringe 200 is shipped with the cylinder member 210 filled with the chemical.

  An RFID tag 230 is attached to the cylinder member 210 of the chemical syringe 200. The RFID tag 230 includes a name, prefilled type or refilled type identification data, identification data for each individual, capacity, cylinder member 210 pressure resistance, cylinder member 210 inner diameter, piston member 220 stroke, Various data such as 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. 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. 6 and 8, 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, whereby the cylinder flange 213 is symmetrical. It has a vertically symmetrical structure.

  However, for this chemical syringe 200, for example, a sticker on which a message such as “Please use this as the upper side” or “Do not use this as the upper side” is attached to the outer peripheral surface of the cylinder body 211. Thus (not shown), it is defined that one of the pair of flat portions 215 is upward and the other is downward.

  And with respect to the chemical | medical solution syringe 200 with which the up-down direction was prescribed | regulated in this way, the RFID tag 230 is on the outer peripheral surface of the lower side of the cylinder main body 211 in the state where the longitudinal direction is parallel to the axial direction of the cylinder member 210. It is installed.

  As shown in FIG. 3, the chemical injection device 100 according to the present embodiment includes an injection head 110 and an injection control unit 101 that are configured separately from each other and are wired by a communication cable 102. The injection head 110 drives the chemical solution syringe 200 to be attached to inject the chemical solution into the subject. 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 as an exterior. The head housing 113 is entirely formed of resin, but as shown in FIGS. 1 and 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 semi-cylindrical holding recess 115 that holds the cylinder main body 211 inserted from above is provided on the upper surface. Is formed. A cylinder holding mechanism 120 is disposed at 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.

  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. 5, 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.

  The chemical injection device 100 according to the present embodiment includes, for example, an RFID reader 130 formed as a chip component having a reader antenna (not shown) mounted on the surface. As shown in FIG. 1, the RFID reader 130 is disposed on the lower surface of the main body holding member 114 so that the reader antenna is positioned on the lower side.

  Furthermore, the chemical injection device 100 of this embodiment has an antenna sheet 131. The antenna sheet 131 has a structure corresponding to the RFID tag 230 from which the circuit chip 232 is omitted. In other words, the antenna sheet 131 has a flat loop antenna formed in a long and narrow shape on a long and narrow resin sheet, and is mass-produced as an off-the-shelf product together with the RFID tag 230. Note that the antenna sheet 131 and the RFID tag 230 are formed in a substantially rectangular shape of 18 mm × 50 mm, for example, and include an MM tag (product name) that performs wireless communication at a frequency of 13.56 MHz.

  And in the chemical injection device 100 of this embodiment, the main body holding member 114 is formed with a horizontally long through-hole 133 that penetrates the holding recess 115 in the thickness direction from the outer surface (lower surface) to the inner surface (bottom surface) of the holding recess 115. ing. The antenna sheet 131 is inserted through the through hole 133.

  One end located above the through hole 133 of the antenna sheet 131 is bent backward, and is disposed on the bottom surface of the holding recess 115 via a ferrite sheet 135 that is a sheet-like high-permeability ferromagnetic material. For this reason, as will be described in detail later, when the chemical syringe 200 is appropriately attached to the injection head 110, one end of the antenna sheet 131 is positioned at a position where the RFID tag 230 is parallelly opposed and well electromagnetically coupled. Has been placed.

  The other end of the antenna sheet 131 located below the through hole 133 is bent forward and disposed on the lower surface of the RFID reader 130. As described above, since the reader antenna of the RFID reader 130 is located on the lower side, the reader antenna and the other end of the antenna sheet 131 are opposed to each other in parallel and are well electromagnetically coupled.

  Since FIG. 1 is a schematic diagram, the ferrite sheet 135 and the antenna sheet 131 located on the bottom surface of the holding recess 115 of the main body holding member 114 protrude, but the thickness of the ferrite sheet 135 and the antenna sheet 131 is actually increased. Is negligible, and does not hinder the mounting of the drug solution syringe 200 on the holding recess 115.

  As shown in FIG. 5, the injection control unit 101 connected to the injection head 110 having the structure as described above by 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. 5, the chemical injection device 100 according to the present embodiment includes various devices such as the RFID reader 130 described above connected to a computer unit 140, and the computer unit 140 performs integrated control of the various devices. The computer unit 140 is a so-called one-chip microcomputer, which 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.

  As shown in FIG. 9, the chemical injection device 100 according to the present embodiment logically has an operation control means 150 as a result of the computer unit 140 operating in response to the computer program implemented as described above. The operation control means 150 logically combines various means such as a data storage means 151, a data collating 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. Have.

  The operation control means 150 corresponds to a function that the CPU 141 executes a predetermined operation corresponding to a computer program installed in the ROM 142 or the like and recording data received wirelessly 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, and when the RFID reader 130 wirelessly receives the recording data from the RFID tag 230 of the chemical syringe 200, the wireless data The received identification data of the chemical syringe 200 is collated with the identification data registered in the RAM 143.

  If the identification data received wirelessly is not registered, a guidance message such as “This product is not registered as a usable syringe, please check if it can be used” will be displayed on the LCD 104 as a confirmation warning. And the 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 have 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 Audio is output from the unit 105.

  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. When the collated serial numbers match, the warning output means 153 displays a guidance message such as “This prefilled syringe has been used in the past. Please use a new product” on the liquid crystal display 104 as a confirmation warning. The sound is output from the speaker unit 105.

  The data holding unit 156 holds recording data wirelessly received 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 data such as the name, pressure resistance, and capacity of the chemical syringe 200, and the name, components, expiry date, and the like of the chemical solution filled in the chemical syringe 200. Since the data is recorded, the recorded data is temporarily stored 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 of the chemical syringe 200 is recorded on the RFID tag 230 of the chemical syringe 200, the CPU 141 corresponds to the detected pressure of the load cell 118 so that the piston drive mechanism does not exceed the pressure resistance held in the RAM 143. The operation of 116 is controlled. In addition, when the volume of the chemical liquid filled in the chemical syringe 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 received wirelessly by the RFID reader 130 from the RFID tag 230, such a computer program collates the confirmation conditions stored in the RAM 143 and 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, controlling the operation of the piston driving mechanism 116 in response to the stored recording data, etc. 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 and attaches the drug solution syringe 200 to the holding recess 115 so that the cylinder flange 213 is inserted therein. After the chemical solution syringe 200 is attached, the operator closes the movable holding member 123.

  As described above, since the vertical direction of the chemical syringe 200 is designated by a sticker or the like attached to the cylinder body 211, when the chemical syringe 200 is mounted, as shown in FIG. 1 and FIG. The person attaches the chemical solution syringe 200 to the chemical solution injection device 100 in an appropriate state where the RFID tag 230 is positioned below.

  Then, since the RFID tag 230 and one end of the antenna sheet 131 face each other in parallel and are well electromagnetically coupled, wireless communication between the RFID tag 230 and the RFID reader 130 is relayed by the antenna sheet 131, and the RFID tag 230 Wireless communication with the RFID reader 130 is satisfactorily performed.

  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 130 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 confirmation conditions, the identification data of the chemical syringe 200 that can be used is registered. Therefore, if the identification data received wirelessly from the RFID tag 230 is not registered as a confirmation condition, a guidance message such as “This product is not registered as a usable syringe, please confirm that it can be used” is displayed. Is displayed on the liquid crystal display 104 as a confirmation warning, and is 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 a medical mistake or 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 operation of 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 stress detected by 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 operation of the piston drive mechanism 116 is controlled in real time so as to satisfy the pressure range wirelessly received from 230 (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. 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 are required. Become. However, such various data are input to the chemical solution 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 of this embodiment, if the chemical syringe 200 is improperly attached to the chemical injection device 100, the RFID tag 230 does not face the one end of the antenna sheet 131 in parallel. In this case, since the RFID tag 230 and one end of the antenna sheet 131 are not electromagnetically coupled, the RFID tag 230 and the RFID reader 130 do not wirelessly communicate (step S1).

  For this reason, for example, as shown in FIG. 8A, the cylinder member 211 may be destroyed by starting the injection operation in a state where the cylinder flange 213 is held by the flat portion 215 by the flange holding member 121. Absent. Further, even if the chemical syringe 200 is mounted on the injection head 110 with the flat portion 215 of the cylinder flange 213 positioned vertically, the RFID tag 230 and the RFID reader 130 do not communicate wirelessly if the chemical syringe 200 is upside down. Therefore (step S1), the injection operation is not started with the chemical syringe 200 turned upside down.

  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 130 (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).

  Then, 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 performed. Is canceled (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.

  Moreover, since the mechanism for detecting the appropriate mounting of the chemical syringe 200 is the RFID tag 230 and the RFID reader 130 for transferring various data from the chemical syringe 200 to the chemical injection device 100, a dedicated sensor mechanism is provided. Therefore, it is possible to detect appropriate attachment of the chemical syringe 200 with a simple structure.

  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 this embodiment, the RFID reader 130 is mounted on the existing injection head 110 with a minimum modification, and in order to wirelessly communicate the RFID reader 130 with the RFID tag 230 of the chemical syringe 200, An antenna sheet 131 can be used. As a result, the productivity of the chemical injection device 100 is good.

  This will be described below. First, as described above, the main body support member 114 that supports the flange holding member 121 is formed of a metal such as an aluminum alloy because sufficient strength is required. Therefore, in order to place the RFID reader 130 at a position facing the RFID tag 230 of the chemical syringe 200, for example, a recess is formed in the bottom surface of the holding recess 115 of the main body support member 114, and the reader antenna is formed on the upper surface thereof. It can be assumed that the RFID reader 130 is arranged to be located (not shown).

  However, in this case, the metal main body support member 114 is positioned in the vicinity of the reader antenna of the RFID reader 130, and the radio communication between the RFID reader 130 and the RFID tag 230 is obstructed by the main body support member 114. Become. In order to solve this, for example, a large recess is formed so that the main body support member 114 is sufficiently separated from the reader antenna of the RFID reader 130, or the main body support member 114 is formed of a high-strength resin. Can be assumed (both not shown). However, in this case, it is necessary to significantly modify the existing chemical injection device 100.

  In the chemical injection device 100 of this embodiment, the RFID reader 130 is disposed on the lower surface of the main body support member 114 with the reader antenna on the lower side. It is separated from the lower surface, and the metal main body support member 114 can be prevented from affecting the reader antenna.

  However, in this case, since the RFID reader 130 is positioned below the metal main body support member 114 and the RFID tag 230 is disposed above the main body support member 114, the RFID tag 230 and the RFID reader 130 are directly electromagnetically coupled. It is difficult to combine.

  Therefore, in the chemical injection device 100 of the present embodiment, one end of the antenna sheet 131 is disposed at a position facing the RFID tag 230 on the upper side of the main body support member 114, and the other end of the RFID reader 130 on the lower side of the main body support member 114. By closely contacting the reader antenna, the RFID reader 130 and the RFID tag 230 can be electromagnetically coupled well.

  Moreover, the antenna sheet 131 is an off-the-shelf product that is mass-produced together with the RFID tag 230, and the modification of the main body support member 114 only forms the slit-shaped through-hole 133. Therefore, the chemical injection device 100 of this embodiment has good productivity. It is.

  Furthermore, in the chemical injection device 100 of this embodiment, one end of the antenna sheet 131 that faces the RFID tag 230 is disposed on the surface of the main body support member 114 via the ferrite sheet 135, so The electromagnetic field passes through the ferrite sheet 135, and the electromagnetic coupling between the RFID tag 230 and the antenna sheet 131 is not hindered by the metal main body support member 114.

  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 injection device 100 in which only one chemical syringe 200 is attached to the injection head 110 is illustrated, but as shown in FIG. 13, the chemical injection in which a plurality of chemical syringes 200 are attached to the injection head 170 An apparatus (not shown) can also be implemented.

  In the above embodiment, the recording data detected by the RFID reader 130 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. 13, 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.

  Further, 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. For example, the left and right fixed holding members are integrally connected below. Thus, it is possible that only the movable holding member 123 is separated to the left and right (not shown). Alternatively, as shown in FIG. 13, the flange holding member may be formed integrally with the main body holding member 174 only by the fixed holding member 173 that does not move.

  Further, for example, a convex portion is formed on at least one of the front and rear surfaces of the holding slit of the fixed holding member, and the convex portion is engaged with a concave portion formed only on at least one lower portion of the front and rear surfaces of the cylinder flange. It is also possible (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, in the above embodiment, only the RFID tag 230 is attached to the lower surface of the chemical syringe 200. However, for example, when viewed from above via the cylinder member 210 filled with a transparent chemical solution, a predetermined shape is obtained. It is also possible to divide the symbol to be divided into the lower surface of the cylinder member 210 and the inner surface of the holding recess 115 of the main body holding member 114 (not shown). In this case, whether or not the chemical syringe is properly held can be confirmed by both the RFID reader 130 and the above-described design, and further, it can be confirmed by the design whether the cylinder member 210 is filled with the chemical solution. it can.

  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, the RFID tag 230 may be mounted on the outer peripheral surface of the cylinder member 210 so as to be wound in the longitudinal direction (not shown).

  Further, in the above embodiment, it is exemplified that the entire cylinder member 210 is formed with a thickness that does not inhibit the electromagnetic induction of the RFID tag 230. For example, when the thickness of the cylinder member is not sufficient, the RFID tag It is also possible to form only a portion where 230 is attached to a predetermined thickness, and it is also possible to attach the RFID tag 230 to the cylinder member via a resin base or the like (both not shown) .

  It is also possible to form a ferromagnetic material having a high permeability such as ferrite in the form of a sheet having a shape equivalent to that of the RFID tag 230, and arrange the RFID tag 230 on the outer peripheral surface of the cylinder member 210 via the magnetic material. Yes (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.

  Further, in the above embodiment, the upper part, which is one end of the antenna sheet 131 inserted through the through hole 133 of the main body support member 114, is bent backward and disposed at a position facing the RFID tag 230, and the lower part, which is the other end. Is illustrated as being bent forward and in close contact with the RFID reader 130.

  However, the RFID reader 130 is disposed behind the through hole 133, and the lower portion of the antenna sheet 131 can be bent rearward to be in close contact with the RFID reader 130. It is also possible to bend and face the RFID tag 230 (both not shown).

  Further, in the above embodiment, the through hole 133 is formed in the lower part of the main body holding member 114 of the chemical liquid injector 100, the antenna sheet 131 and the RFID reader 130 are disposed, and the RFID member 130 is disposed in the lower part of the cylinder member 210 of the chemical liquid syringe 200. Exemplified that the tag 230 is arranged.

  However, through holes 133 are formed in the left and right parts of the main body holding member 114 and the antenna sheet 131 and the RFID reader 130 are arranged, and the corresponding left and right parts of the cylinder member 210 are arranged. An RFID tag 230 may be disposed (not shown).

  Further, in the above embodiment, the ferrite sheet 135 and the antenna sheet 131 having negligible thicknesses are disposed on the bottom surface of the holding recess 115 of the main body holding member 114. It is also possible to form a hole and place one end of ferrite sheet 135 and antenna sheet 131 (not shown). In this case, even when the thickness of the ferrite sheet 135 and the antenna sheet 131 cannot be ignored, the chemical syringe 200 can be satisfactorily attached to the holding recess 115 without being inhibited by the thickness.

  In the above embodiment, the upper surface of the other end of the antenna sheet 131 is illustrated in close contact with the lower surface of the RFID reader 130. However, if electromagnetic induction is performed well, the upper surface of the other end of the antenna sheet 131 and the RFID It is also possible for the lower surface of the reader 130 to face away from the reader 130 (not shown).

  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 applicant, the chemical syringe 200 has a plurality of sizes, and as shown in FIG. 14, a cylinder adapter 400 is prepared for each chemical syringe 200 of a size other than the maximum. Yes.

  In such a chemical liquid injection system, the chemical liquid syringe 200 having the maximum size is directly attached to the chemical liquid injection apparatus 100, and the chemical liquid syringe 200 having a size other than the maximum is attached via the cylinder adapter 400. Therefore, when the cylinder adapter 400 is properly attached to the chemical solution injector 100, the RFID tag 230 can be attached to the outer surface and the inner surface of the cylinder adapter 400 facing in parallel with one end of the antenna sheet 131. is there.

  In this case, the chemical injection device 100 can confirm whether both the cylinder adapter 400 and the chemical syringe 200 are properly attached. Then, by checking the recorded data of the cylinder adapter 400 and the recorded data of the chemical syringe 200, it is possible to confirm whether the combination of the chemical syringe 200 and the cylinder adapter 400 is appropriate.

  Moreover, since the RFID reader 130 for the MM tag can wirelessly communicate with the plurality of RFID tags 230, the chemical injection device 100 can be connected to the RFID tag 230 of both the cylinder adapter 400 and the chemical syringe 200 with one RFID reader 130. 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 antenna sheet 131 of the chemical solution injection device 100 are opposed to each other via the cylinder adapter 400. And a non-magnetic material such as a resin that does not hinder wireless communication with the RFID reader 130.

  Further, in the above embodiment, in order to restrict the use of the chemical syringe 200 and the like at a time, the chemical injection device 100 wirelessly receives and stores the serial number of each individual from the RFID tag 230 of the chemical syringe 200 used by the RFID reader 130. 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-variable variable pattern of chemical injection is recorded in the RFID tag 230 of the chemical syringe 200, and when an imaging part by the CT scanner 300 is input to the operation panel 103 or the like, the imaging part is displayed. Correspondingly, the variable pattern can be adjusted.

  Moreover, in the said form, it was assumed that the chemical | medical solution injection apparatus 100 which complete | finished injection | pouring operation | movement and registered the manufacturing number wirelessly received from the RFID tag 230 of the chemical | medical solution syringe 200 complete | finishes various operations. However, for example, when the chemical injection device 100 that has completed the injection operation and the registration of the serial number as described above detects the removal of the chemical syringe 200 by the RFID reader 130, the piston drive mechanism 116 is moved to the initial position at the end. It is also possible to retract automatically.

  Further, when the chemical injection device 100 that has completed the various operations in this manner and has moved the piston drive mechanism 116 back to the initial position detects the mounting of the new chemical syringe 200 by the RFID reader 130, 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, 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. Therefore, no special operation is required for this arrangement. The convenience of the 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 refill type medical solution syringe 200, various data of the chemical 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.

  Further, in the above embodiment, only the piston member 220 is pushed into the cylinder member 210 of the chemical liquid syringe 200 in order for the chemical liquid injection device 100 to inject the chemical liquid into the subject. However, for example, a separate chemical liquid pack is connected with an extension tube. By extracting the piston member 220 from the cylinder member 210, the chemical solution injection device 100 can fill the chemical solution syringe 200 with the chemical solution (not shown).

  In the above embodiment, the CT scanner 300 is used as the fluoroscopic imaging apparatus and the chemical injection device 100 injects the contrast medium for CT. For example, an MRI apparatus or a PET apparatus is used as the fluoroscopic imaging apparatus. It is also possible to inject a contrast medium for that purpose using a chemical liquid injector.

  Furthermore, although each part, such as the chemical | medical solution injection apparatus 100, was specifically demonstrated in the said form, each part can also be changed into various, for example, the drive source of a piston drive mechanism is a DC (Direct Current) motor, 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, a plasma display, or the like (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 (13)

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 syringe is equipped with an RFID (Radio) that wirelessly transmits recording data by electromagnetic induction
Frequency Identification) tag is attached at a predetermined position on the outer peripheral surface of the cylinder body,
The chemical injection device holds a metal main body holding member provided with a holding recess for holding the cylinder main body inserted from above and the cylinder flange supported by the main body holding member and inserted from above. A metal flange holding member, a piston drive mechanism that pushes the piston member into the cylinder body held together with the cylinder flange, an RFID reader that wirelessly receives recording data of the RFID tag by electromagnetic induction, and the recording data An operation control means for controlling the operation of the piston drive mechanism in response to wireless reception of the antenna, and an antenna sheet having an elongated loop antenna,
The main body holding member is formed with a through hole penetrating from the outer surface to the inner surface of the holding recess, and the RFID reader is disposed at a position adjacent to the through hole on the outer surface of the holding recess and is inserted into the through hole. and that the antenna sheet has one end, Oite the inner surface of the holding recess, together with the said liquid syringe is properly mounted on the chemical liquid injector RFID tag is arranged at a position opposing the other end Is a chemical injection system facing the RFID reader. The RFID tag is formed in a substantially rectangular sheet shape,
The chemical solution injection system according to claim 1, wherein the antenna sheet has a structure in which a loop antenna is formed on a substantially rectangular sheet. The RFID tag is disposed at a position below the cylinder member held by the main body holding member at a specific rotational position,
The chemical injection system according to claim 1 or 2, wherein one end of the antenna sheet is disposed on the bottom surface of the holding recess.   The said main body holding member is formed with the nonmagnetic metal, The one end of the said antenna sheet | seat is arrange | positioned in the inner surface of the said holding | maintenance recessed part via the sheet-like magnetic body. The chemical solution injection system described.   The chemical solution 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 claim 4 or 5, wherein the magnetic body is ferrite.   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 solution injection system according to any one of 1 to 6. 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 injection system according to any one of claims 1 to 7, wherein a concave portion that engages the convex portion at a specific rotational position is formed on at least one of a front surface and a rear surface of the cylinder flange.   The chemical liquid injection system according to any one of claims 1 to 8, wherein the operation control unit permits the operation of the piston drive mechanism only when the RFID reader detects the RFID tag of the chemical liquid syringe. The chemical solution injection system according to any one of claims 1 to 9, wherein the chemical solution syringe includes a prefilled type chemical solution syringe. An RFID (Radio) that wirelessly transmits recorded data by electromagnetic induction, with a piston member slidably inserted into a cylinder member having a cylinder flange formed on the outer periphery of the rear end of the cylinder body
(Frequency Identification) tag is a chemical injection device in which a chemical syringe is attached to a predetermined position on the outer peripheral surface of the cylinder body, and the piston member is pushed into the cylinder member to inject the chemical into a subject,
A metal main body holding member provided with a holding recess for holding the cylinder main body inserted from above;
A metal flange holding member that is supported by the main body holding member and holds the cylinder flange inserted from above;
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;
An antenna sheet having an elongated loop antenna,
A through-hole penetrating from the outer surface to the inner surface of the holding recess is formed in the main body holding member,
The RFID reader is disposed at a position adjacent to the through hole on the outer surface of the holding recess,
Said antenna sheet being inserted into the through hole has one end, Oite the inner surface of the holding recess, the said liquid syringe is properly mounted on the chemical liquid injector RFID tag is arranged at a position facing together are liquid injector which has the other end facing the RFID reader. The RFID tag is formed in a substantially rectangular sheet shape,
The antenna sheet, liquid injector according to claim 1 1 having a structure in which the loop antenna is formed in a substantially rectangular sheet. The chemical solution injection device according to claim 11 or 12, wherein the chemical solution syringe includes a prefilled type chemical solution syringe.

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