JP4481585B2 - Chemical injection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chemical injection device that injects a chemical into a subject, and more particularly to a chemical injection device that presses a piston member of a chemical syringe and press-fits into a cylinder member in order to inject the chemical into the subject.
[0002]
[Prior art]
At present, CT (Computed Tomography) scanner, MRI (Magnetic Resonance Imaging) apparatus, PET (Positron Emission Tomography) apparatus, ultrasonic diagnostic apparatus, angio apparatus, MRA (MR Angio apparatus) ) Equipment, etc.
[0003]
When using the apparatus as described above, a chemical liquid such as a contrast medium or physiological saline may be injected into the subject, and a chemical liquid injection apparatus that automatically executes this injection has also been put into practical use. The above-described chemical liquid injector has an injection head, and a chemical syringe is detachably attached to the injection head.
[0004]
The chemical liquid syringe has a cylindrical cylinder member filled with the chemical liquid, and a columnar piston member is slidably inserted into the cylinder member. Generally, an annular cylinder flange is formed on the outer periphery of the rear end of the cylinder member, and an annular piston flange is formed on the outer periphery of the rear end of the piston member.
[0005]
When using a chemical injection device, the cylinder member of the chemical syringe filled with the chemical solution is connected to the subject with an extension tube, and the chemical syringe is attached to the syringe holding member of the chemical injection device. In a general chemical solution injector, a concave portion having a shape corresponding to the cylinder member and cylinder flange of the chemical syringe is formed on the upper surface of the syringe holding member. Retained.
[0006]
Furthermore, the chemical liquid injector holds the piston flange separately from the cylinder member by the piston drive mechanism, and slides the piston member by the piston drive mechanism. Thus, the chemical solution is injected into the subject from the chemical solution syringe. For example, the chemical solution is sucked into the chemical solution syringe from an external chemical solution tank as necessary.
[0007]
The piston member of the chemical syringe as described above generally has a structure in which a piston head is mounted on the front end of a piston rod in which a piston flange is formed on the outer periphery of the rear end. There is also a chemical syringe formed.
[0008]
In such a chemical injection device corresponding to a chemical syringe, a piston driving mechanism slidably supports a slide rod having a chuck mechanism formed at the front end, and the piston member is held by the chuck mechanism of the slide rod to be a cylinder. Slide the inside of the member.
[0009]
In such a chemical liquid injector, there is a product in which pressure detection means such as a load cell is provided in the piston drive mechanism, and the pressure at which the piston drive mechanism presses the piston member is detected. In such a chemical injection device, the piston drive mechanism is forcibly stopped when the above-described pressure rises above a predetermined value, thereby preventing the chemical syringe from being damaged or injecting the chemical at an abnormal pressure.
[0010]
The chemical solution injection device as described above has been invented and applied in the past by the present applicant and the like (for example, see Patent Documents 1 and 2).
[0011]
[Patent Document 1]
JP 2002-11096 A
[Patent Document 2]
JP 2002-102343 A
[0012]
[Problems to be solved by the invention]
In the above-described chemical liquid injector, the chemical liquid can be injected into the subject by pressing the piston member of the chemical syringe and press-fitting into the cylinder member, and by detecting the pressure at which the piston driving mechanism presses the piston member. It is also possible to prevent the drug solution from being injected into the subject at an abnormally high pressure.
[0013]
However, if air is mixed in the chemical solution of the chemical syringe loaded in the above-described chemical injection device, a medical error will occur in which this air is injected into the subject. In order to prevent this, conventionally, the operator visually confirms the chemical syringe loaded in the chemical injector, but there is a possibility that air may be injected into the subject due to the operator's omission or carelessness. It was.
[0014]
This invention is made | formed in view of the above subjects, and it aims at providing the chemical | medical solution injection | pouring apparatus which can automatically prevent that a test subject inject | pours air from a chemical | medical solution syringe.
[0015]
[Means for Solving the Problems]
  The chemical injection device of the present invention is a chemical injection device for injecting a chemical into a subject by at least pressing the piston member into the cylinder member of a chemical syringe in which a piston member is slidably inserted into a cylinder member,
  With piston pressing memberPress the piston memberThe piston memberThe cylinder memberInsideA piston drive mechanism for press-fitting into,
  Pressure detecting means for detecting the pressure with which the piston driving mechanism presses the piston member;
  Pressure storage means for storing data to be detected by the pressure detection means for each state of the piston drive mechanism and the liquid syringe;
  A state detecting means for performing data comparison between the pressure stored in the data and the detected pressure, and detecting the state of the piston drive mechanism and the liquid syringe;
  Drive control means for controlling the operation of the piston drive mechanism in response to a state in which the state detection means detects data, and
  In the pressure memory means, air is mixed in the chemical solution.StateThe first pressure (or its change over time) is stored,
  The state detecting means collates data between the pressure (or its change over time) detected by the pressure detection means and the first pressure (or its change over time), so that air is mixed into the chemical liquid. To determine whetherAnd moreover,
  The piston drive mechanism is
  It also has at least a pair of engaging claws that are attached to the piston pressing member so as to be freely opened and closed and engage with a piston flange of the piston member,
  The pressure storage means includes
  The pressure when the piston pressing member is not in contact with the piston member;
  The pressure in a state where the engagement claw is pressed against the piston flange; and
  The pressure in a state in which the engagement claw is engaged is stored,
  The drive control means includes
(I) When the state where the piston pressing member is not in contact with the piston member is detected, the piston driving mechanism is operated,
(Ii)When the state in which the engagement claw is pressed against the piston flange is detected, the piston drive mechanism is further operated,
(Iii) When the state in which the engaging claw is engaged with the piston flange is detected, the piston driving mechanism is temporarily stopped.
[0018]
Therefore, in the chemical injection device of the present invention, the state of the piston drive mechanism and the chemical syringe is detected by collating data with the pressure or temporal change stored in the data and the detected pressure or temporal change. A state in which air is mixed in the liquid medicine of the syringe is also detected.
[0019]
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.
[0020]
Further, the various constituent elements referred to in the present invention do not have to be individually independent. For example, a plurality of constituent elements are formed as one member, and a certain constituent element is another constituent element. It is possible that it is a part, a part of a certain component overlaps a part of another component, and the like.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the following description, the front / rear, left / right, and upper / lower directions are defined and described as shown in the drawings. However, this is provided for convenience in order to simplify the explanation of the relative relationship between the respective parts. It does not limit the direction of production or use.
[0022]
[Configuration of the embodiment]
As shown in FIGS. 1 to 4, the chemical injection system 1000 according to the present embodiment includes a chemical injection device 100, a chemical syringe 200, and an MRI apparatus 300 that is a fluoroscopic imaging apparatus. The MRI apparatus 300 includes an imaging unit. 301 and a control unit 302.
[0023]
The imaging unit 301 captures a fluoroscopic image from the subject, and the control unit 302 controls the operation of the imaging unit 301. The MRI apparatus 300 and the drug solution injector 100 are connected online by a communication network (not shown), and the drug injector 100 injects a drug solution such as a contrast medium from the drug syringe 200 to a subject whose fluoroscopic image is captured. .
[0024]
As shown in FIG. 3, the chemical injection device 100 according to the present embodiment has an operation panel 102, a liquid crystal display 103, a speaker unit 104, and a barcode reader 105 as a syringe input means arranged on the upper surface of the apparatus main body 101. The injection head 110 is mounted on the side of the apparatus main body 101 with a movable arm 106. As shown in FIG. 2, the injection head 110 has a semi-cylindrical groove-shaped recess 112 formed on the upper surface of the head main body 111, and the drug syringe 200 is detachably attached to the recess 112.
[0025]
The chemical syringe 200 includes a cylinder member 201 and a piston member 202, and the piston member 202 is slidably inserted into the cylinder member 201. A cylinder flange 203 is formed on the outer periphery of the rear end of the cylinder member 201, and a piston flange 204 is formed on the outer periphery of the rear end of the piston member 202. Further, on the outer peripheral surface of the cylinder member 201, identification data of the chemical syringe 200 is recorded with a barcode mark 205, and this barcode mark 205 is optically read by the barcode reader 105 of the chemical injection device 100.
[0026]
The injection head 110 of the chemical liquid injection device 100 has a cylinder holding portion 113 that holds the cylinder flange 203 of the chemical liquid syringe 200 formed in front of the concave portion 112 on the upper surface, and a piston drive that holds and slides the piston flange 204. A mechanism 120 is arranged.
[0027]
As shown in FIG. 5, the piston drive mechanism 120 has a slide rod 121 that is slidable in the front-rear direction. A piston pressing member 122 that presses the piston member 202 forward is provided at the front end of the slide rod 121. It is integrally formed.
[0028]
A pair of engaging claws 123 that can be freely opened and closed are individually mounted on the left and right sides of the piston pressing member 122, and these engaging claws 123 are elastically moved in the closing direction by a spring mechanism such as a coil spring. It is energized. Since these engaging claws 123 are wedge-shaped at the tips, when the piston pressing member 122 is pressed against the piston member 202 from the rear, the left and right portions of the front surface of the piston flange 16 are individually engaged. To do.
[0029]
In addition, a load cell 124 (not shown) that is a pressure detecting means is built in a joint portion between the slide rod 121 and the piston pressing member 202, and the piston member 202 is pressed by the piston pressing member 202 in the load cell 124. Detect the pressure. The load cell 124 is made of a nonmagnetic material such as a phosphor bronze alloy (Cu + Sn + P), a titanium alloy (Ti-6Al-4V), or a magnesium alloy (Mg + Al + Zn).
[0030]
The piston drive mechanism 120 has a drive motor 126 as a drive source for slidingly moving the slide rod 121. The drive motor 126 is formed of a non-magnetic material and has a magnetic force that affects the magnetic field even during operation. It consists of an ultrasonic motor that does not generate.
[0031]
As shown in FIG. 6, the chemical injection device 100 according to this embodiment includes a computer unit 130, and the computer unit 130 includes an operation panel 102, a liquid crystal display 103, a barcode reader 105, and a piston drive mechanism 120. It is connected.
[0032]
The computer unit 130 includes a so-called one-chip microcomputer, and has hardware such as a CPU (Central Processing Unit) 131, a ROM (Read Only Memory) 132, a RAM (Random Access Memory) 133, and an I / F (Interface) 134. is doing.
[0033]
In the computer unit 130, an appropriate computer program is mounted as firmware on an information storage medium such as the ROM 132, and the CPU 131 executes various processing operations corresponding to the computer program. The computer unit 130 operates in accordance with the computer program implemented as described above, whereby the pressure storage unit 141, the state detection unit 142, the drive control unit 143, the state display unit 144, the warning output unit 145, the operation Various means such as interlocking means 146 are logically provided.
[0034]
The pressure storage unit 141 corresponds to a storage area of the RAM 133 that the CPU 131 recognizes data corresponding to a computer program installed in the ROM 132 or the like, and for each state of the piston drive mechanism 120 and the chemical syringe 200, and the chemical syringe The pressure detected by the load cell 124 is stored for every 200 pieces of identification data.
[0035]
The state detection unit 142 corresponds to a function in which the CPU 131 searches the stored data in the RAM 133 by using the input data of the barcode reader 105 or the load cell 124 corresponding to the computer program, and the barcode mark of the liquid syringe 200 is read by the barcode reader 105. Corresponding to the identification data optically read from 205, the pressure detected by the load cell 124 and the pressure stored in the pressure storage unit 141 are collated, and the states of the piston drive mechanism 120 and the chemical syringe 200 are stored as data. To detect.
[0036]
The drive control means 143 corresponds to the function of the CPU 131 controlling the operation of the drive motor 126 of the piston drive mechanism 120, and controls the operation of the piston drive mechanism 120 in accordance with the state of data detected by the state detection means 142. More specifically, the pressure in a state where the piston pressing member 122 is not in contact with the piston member 202 is registered in the RAM 133 regardless of the identification data of the chemical syringe 200, and the pressure in the state in which the piston pressing member 122 is in contact is stored in the RAM 133. Data is registered for each identification data of the chemical syringe 200,
Further, the pressure in a state where the piston pressing member 122 is in contact with the piston member 202 is a pressure in a state where the piston member 202 is pressed but not slid by the piston pressing member 122, and the piston member 202 is slid. Then, the pressure when the chemical liquid is normally injected from the cylinder member 201 to the subject, the pressure when air is mixed in the chemical liquid, and the pressure when air is injected from the cylinder member 201 to the subject are registered as data. Has been.
[0037]
Note that the pressure in the state in which the chemical liquid is normally injected into the subject is registered as a predetermined range with an upper limit and a lower limit, and air is mixed in the chemical liquid as a range not included in the predetermined range. The pressure and the pressure in a state where air is injected from the cylinder member 201 to the subject are registered as data.
[0038]
And in the chemical | medical solution injection | pouring apparatus 100 of this form, the chemical | medical solution syringe 200 is loaded in the recessed part 112 of the injection | pouring head 110 by the operator in the state which the piston press member 122 has been arrange | positioned by the piston drive mechanism 120 at the last part, and work in this state When the piston is input to the operation panel 102 by a person, the piston pressing member 122 is advanced by the piston drive mechanism 120 until the piston flange 204 is held by the engagement claw 123.
[0039]
At this time, when the CPU 131 detects data from the detected pressure of the load cell 124 that the piston pressing member 122 is not in contact with the piston member 202, the CPU 131 advances the piston pressing member 122 forward to the engagement claw. When data is detected in a state where 123 is engaged with the piston flange 204 and the piston pressing member 122 is pressed against the piston member 202, the piston driving mechanism 120 is temporarily stopped.
[0040]
In the chemical injection device 100 of this embodiment, when the operator inputs the chemical injection into the operation panel 102 with the piston pressing member 122 in contact with the piston member 202 as described above, the input operation capacity Or the piston pressing member 122 is advanced by the piston drive mechanism 120 until the time is satisfied.
[0041]
At this time, the CPU 131 operates the piston drive mechanism 120 when data is detected from the detected pressure of the load cell 124 when the liquid is normally injected into the subject, and if the data is not detected, the piston drive mechanism 120 is activated. Is forcibly stopped.
[0042]
The status display unit 144 corresponds to a function of causing the CPU 131 to display and output various data on the liquid crystal display 103. The status display unit 144 displays various states detected by the state detection unit 142 on the liquid crystal display 103 with guidance texts corresponding to each status. Output.
[0043]
More specifically, when data is detected that the piston pressing member 122 is not in contact with the piston member 202 as described above, guidance text such as “automatic holding of syringe piston” is displayed and output. When the state where the piston pressing member 122 is in contact with the piston member 202 is detected, guidance text such as “Automatic holding of syringe piston completed” is displayed and output.
[0044]
In addition, when data is detected that the drug solution is being injected normally to the subject, guidance text such as “A drug injection is in progress” is displayed and output. A guidance text such as “Abnormality has been detected. Check the syringe, etc.” is displayed and output.
[0045]
However, the guidance text such as “Detected air injection, please check the syringe” is displayed, especially when data is detected that the subject is injecting air as a state where this drug solution has not been injected normally. When it is displayed and data is detected that air is mixed in the chemical, guidance text such as “Air contamination detected, please check the syringe” is displayed and output.
[0046]
The warning output means 145 corresponds to a function of the CPU 131 outputting various data to the speaker unit 104 by voice, and the above-mentioned “abnormality has been detected, please check the syringe” “air injection was detected, syringe "Please confirm the syringe, please check the syringe." Guidance text is output to the speaker unit 104 as a confirmation warning.
[0047]
The operation interlocking unit 146 corresponds to a function of the CPU 131 performing data communication with the MRI apparatus 300 using the I / F unit 134, and links the imaging operation of the MRI apparatus 300 to the state where data is detected. More specifically, when the piston drive mechanism 120 is operated by detecting data on the state in which the drug solution is normally injected into the subject, the MRI apparatus 300 also performs the imaging operation and is not injected normally. When the state is detected and the piston drive mechanism 120 is forcibly stopped, the MRI apparatus 300 also stops the imaging operation.
[0048]
The various means 141 to 146 of the chemical liquid injector 100 as described above are realized by using hardware such as the I / F unit 134 as necessary, but the main body is a computer stored in an information storage medium such as the ROM 132. This is realized by the function of the CPU 131 which is hardware corresponding to the program.
[0049]
Such a computer program stores, for example, data stored in the RAM 133 or the like for the pressure detected by the load cell 124 for each state of the piston drive mechanism 120 and the chemical syringe 200 and for each identification data of the chemical syringe 200. Corresponding to the identification data optically read from the barcode mark 205 of the chemical syringe 200 by the barcode reader 105, the detected pressure of the load cell 124 and the stored pressure of the RAM 133 are collated to check the piston drive mechanism 120 and the chemical syringe 200. Detecting the state data, controlling the operation of the piston drive mechanism 120 in response to the detected data state, and causing the liquid crystal display 103 to display and output various data detected states with guidance texts corresponding to each state. ,data If necessary, the CPU 131 or the like performs processing operations such as outputting a confirmation warning to the speaker unit 104 as necessary in response to the various states that have been issued, and linking the imaging operation of the MRI apparatus 300 to the data detection state. It is stored in an information storage medium such as a ROM 132 as software for the above.
[0050]
[Operation of the embodiment]
In the configuration as described above, when using the liquid injector 100 according to the present embodiment, for example, the operator selects an appropriate liquid syringe 200 corresponding to the liquid injected into the subject, and the liquid syringe 200 is selected as the MRI. An extension tube is connected to a subject located in the imaging unit 301 of the apparatus 300 (not shown).
[0051]
Next, as shown in FIG. 7, when the operator optically reads the barcode mark 205 of the chemical solution syringe 200 by the barcode reader 105 of the chemical solution injection device 100 (step S <b> 1), the chemical solution injection device 100 displays the barcode mark 205. The identification data of the chemical syringe 200 is detected from 205 and held in the work area of the RAM 133 (step S2).
[0052]
Next, when the operator loads the chemical liquid syringe 200 into the recess 112 of the injection head 110 and inputs the piston holding operation to the operation panel 102 (step S3), the chemical liquid injection device 100 operates the drive motor 126 of the piston drive mechanism 120. (Step S4), the piston pressing member 122 positioned at the end in the initial state is advanced.
[0053]
At this time, the pressure detected by the load cell 124 of the piston drive mechanism 120 is acquired (step S5), the data stored in the RAM 133 is retrieved using the detected pressure (step S6), and the piston pressing member 122 is moved to the piston member 202. Data is detected as to whether it is in a non-contact state or a contact state (step S7).
[0054]
For example, the detected pressure of the load cell 124 in a state where the piston pressing member 122 is not in contact with the piston member 202 is “0 (g)”, and the maximum pressure until the engaging claw 123 is pressed against and engaged with the piston flange 204. Is “20 (g)”, and the minimum pressure when the piston member 202 pressed by the piston pressing member 122 starts to slide is “80 (g)”.
[0055]
In this case, data is registered in the RAM 133 for each state such as “non-contact: pressure ≦ 40 (g), contact: pressure> 40 (g)”, and the detected pressure of the load cell 124 is “40 (g). Until “40” is exceeded, data is detected when the piston pressing member 122 is not in contact with the piston member 202, and data is detected when “40 (g)” is exceeded.
[0056]
When the piston holding is input without reading the barcode mark 205 optically (steps S1 to S3), the identification data of the liquid syringe 200 held last time is used and the identification data is not held. When the default identification data is used.
[0057]
When data indicating that the contact is not detected is detected, the operation of the piston drive mechanism 120 is continued (steps S4 to S7), and a guidance text such as “automatic holding of the syringe piston” is displayed on the liquid crystal display. The display is output to 103 (step S8).
[0058]
On the other hand, when the data of the contact state is detected, the operation of the piston drive mechanism 120 is temporarily stopped (steps S7 and S9), and guidance text such as “Automatic holding of the syringe piston is completed” is displayed on the liquid crystal display 103. Is output (step S10).
[0059]
Therefore, when the operator loads the chemical syringe 200 on the injection head 110 and executes a predetermined operation on the operation panel 102, the piston flange 204 is automatically held by the engagement claw 123 of the piston drive mechanism 120, and this state Thus, the piston drive mechanism 120 automatically stops.
[0060]
Therefore, as shown in FIG. 8, when the operator inputs the chemical injection to the operation panel 102 in the above-described state (step S11), the chemical injection device 100 transmits the injection start to the MRI apparatus 300 (step S12). Then, the drive motor 126 of the piston drive mechanism 120 is operated (step S13).
[0061]
The medicinal solution injection device 100 starts injecting the medicinal solution from the medicinal solution syringe 200 to the subject, and the MRI apparatus 300 that has received the data of the infusion start from the medicinal solution injecting device 100 also starts to capture a fluoroscopic image. Will start automatically.
[0062]
When the operation of the piston drive mechanism 120 is started as described above (step S13), the pressure detected by the load cell 124 is acquired (step S14), and the RAM 133 is obtained from the detected pressure and the identification data of the chemical syringe 200. The memory pressure is retrieved for data (step S15).
[0063]
Therefore, when data is detected indicating that the chemical liquid is normally injected from the cylinder member 201 to the subject (step S16), guidance text such as “chemical liquid injection is in progress” is displayed on the liquid crystal display 103. (Step S17), the operation of the piston drive mechanism 120 is continued (Steps S13 to S19).
[0064]
On the other hand, if no data is detected in the state in which the chemical liquid is normally injected from the cylinder member 201 to the subject (step S16), the operation of the piston drive mechanism 120 is forcibly stopped (step S23), corresponding to the detected state. The guidance text is output as voice by the speaker unit 104 and displayed on the liquid crystal display 103 (steps S24 and S25).
[0065]
For example, the detection pressure of the load cell 124 in a state where the piston pressing member 122 presses the piston member 202 and the chemical liquid is normally injected is “60 to 70 (g)”, and the pressure in a state where air is mixed in the chemical liquid. Is “50 to 60 (g)”, and the pressure when air is being injected is “30 to 40 (g)”.
[0066]
In this case, since the above-described pressure range is registered in the RAM 133 for each of various states, when the detected pressure of the load cell 124 is in the range of “60 to 70 (g)”, the chemical solution is normally injected. Is detected, and when it is outside this range, the state in which the chemical solution is not normally injected is detected.
[0067]
Furthermore, when data is detected in such a state that the chemical solution is not normally injected, if the detected pressure is “50 to 60 (g)”, the data in which the chemical solution is mixed with air is detected, and “30 If it is ˜40 (g) ”, the state in which air is being injected into the subject is detected.
[0068]
Therefore, when data is detected that the chemicals are not being injected normally, guidance text such as “Abnormality has been detected. Check the syringe, etc.” will be output and displayed as a voice. The person recognizes that an abnormality has occurred in the liquid medicine injection and will deal with it.
[0069]
In particular, when data that detects air contamination is detected, guidance text such as “Air contamination detected, please check the syringe” is output and displayed as voice, and air is injected. When data is detected, guidance text such as “Air injection detected, please check the syringe” will be output and displayed, so the operator will check for air injection or air contamination. To deal with it.
[0070]
Further, as described above, when data is detected and the operation of the piston drive mechanism 120 is forcibly stopped (steps S16 and S23), the forced stop is performed from the chemical injection device 100 to the MRI apparatus. Data is transmitted to 300 (step S26). The MRI apparatus 300 that has received this forced stop data stops image capturing, so that the stop of the chemical injection and image capturing is also automatically linked.
[0071]
Even when the chemical injection device 100 detects and executes normal injection (steps S13 to S19), when the injection completion is detected (step S18), or when injection stop is input (step S19). ), The operation of the piston drive mechanism 120 is stopped (step S20).
[0072]
Also at this time, since the stop of the chemical injection is transmitted from the chemical injection device 100 to the MRI apparatus 300 (step S21), the MRI apparatus 300 that has received the data of the stop also stops imaging. In addition, since guidance text such as “chemical injection completed” or “chemical injection stopped” is displayed on the liquid crystal display 103 (step S22), the operator confirms the completion or cancellation of the chemical injection. become.
[0073]
[Effect of the embodiment]
In the chemical injection device 100 according to the present embodiment, as described above, when the piston drive mechanism 120 presses the piston member 202 of the chemical syringe 200 and injects the chemical from the cylinder member 201 to the subject, the pressure of the pressing is changed in real time. Since the detected data is collated with the pressure stored in the data, various states of the piston drive mechanism 120 and the chemical syringe 200 can be detected in real time.
[0074]
Since the piston drive mechanism 120 is controlled in response to the data detection state, the piston drive mechanism 120 can be automatically stopped when an abnormal state is detected. In addition, since guidance text is displayed and output on the liquid crystal display 103 in accordance with the state of data detection, it is possible for the operator to recognize various states of chemical injection in real time.
[0075]
In particular, when a state in which air is mixed in a chemical solution or a state in which air is injected into a subject is detected as an abnormal state, guidance text corresponding to these is displayed on the liquid crystal display 103. Can be recognized quickly and dealt with. Moreover, when the abnormal state data is detected as described above, the speaker unit 104 also outputs the guidance text by voice, so that the occurrence of the abnormality can be promptly and reliably recognized by the operator.
[0076]
As described above, the detection pressure used for state detection varies greatly depending on the type of the chemical syringe 200. However, in the chemical injection device 100 of this embodiment, the pressure for each state is stored as data for each identification data of the chemical syringe 200. Since the pressure is collated in accordance with the identification data inputted as data, various states can be appropriately detected in correspondence with the chemical syringe 200 to be used.
[0077]
In addition, the identification data of the chemical syringe 200 is recorded by the barcode mark 205, and the chemical injection device 100 optically reads the identification data from the barcode mark 205 of the chemical syringe 200 by the barcode reader 105. Easy input and no worries about incorrect input.
[0078]
Furthermore, the chemical injection device 100 also operates the piston drive mechanism 120 when the chemical syringe 200 is first attached, and temporarily activates the piston drive mechanism 120 when the pressure that the piston pressing member 122 presses the piston member 202 is detected. Since it is stopped, the piston flange 204 can be automatically held by the engaging claw 123.
[0079]
In addition, the chemical injection device 100 transmits data to the MRI apparatus 300 for various states of chemical injection for detecting data, and the MRI apparatus 300 also controls the image capturing operation in response to the various states for receiving data. The start and stop of image capturing can be automatically linked.
[0080]
Furthermore, the chemical injection device 100 detects the pressure by which the piston drive mechanism 120 presses the chemical syringe 200 with a load cell 124 formed of a nonmagnetic material, and the piston drive mechanism 120 is an ultrasonic motor formed of a nonmagnetic material. Since it is driven by 126, the chemical injection device 100 does not affect the magnetic field of the MRI apparatus 300.
[0081]
[Modification of Embodiment]
The present invention is not limited to the present embodiment, and various modifications are allowed without departing from the scope of the present invention. For example, in the above embodiment, the pressure detected by the load cell 124 for each state of the drive mechanism 120 and the chemical syringe 200 is registered as data in the chemical injection device 100. However, the change over time in the pressure is registered as data. It is also possible.
[0082]
In that case, the state of the piston drive mechanism 120 and the chemical syringe 200 is detected by comparing the data stored over time with the detected pressure over time by pattern matching or the like, and with higher accuracy. Various states can be detected.
[0083]
It should be noted that the method of collating pressure data can reduce the burden of data processing, and the method of collating data with pressure over time can improve the detection accuracy of various states, so they have advantages and disadvantages. When implementing, it is preferable to select an appropriate one in consideration of various conditions.
[0084]
Further, in the above embodiment, it is exemplified that the bar code mark 205 is formed on the cylinder member 201 of the chemical syringe 200. However, the bar code mark 205 is formed on the piston member 202 or a packing material (not shown). It is also possible. Furthermore, although the identification data of the liquid syringe has been recorded with the barcode mark 205, it can be recorded with a magnetic stripe, an IC (Integrated Circuit) chip, the outer shape of the cylinder member 201, or the like. is there.
[0085]
Further, in the above embodiment, the barcode reader 105 is mounted on the apparatus main body 101 of the chemical solution injector 100, and the operator loads the chemical syringe 200 optically reading the barcode mark 205 into the concave portion 112 of the injection head 110. Exemplified what to do. However, it is also possible to mount the barcode reader 105 in the recess 112 of the injection head 110 and automatically optically read the barcode mark 205 of the drug solution syringe 200 attached thereto.
[0086]
Moreover, although the said form illustrated that only one chemical | medical solution syringe 200 was loaded in the injection | pouring head 110 of the chemical | medical solution injection apparatus 100 in the said form, for example, like the injection | pouring head 150 illustrated in FIG. It is also possible to load the syringe 200.
[0087]
Furthermore, in the above embodiment, it is exemplified that the injection head 110 is connected by the movable arm 106 to the apparatus main body 101 on which the bar code reader 105 and the liquid crystal display 103 of the chemical injection apparatus 100 are mounted. Like the injection head 150, the barcode reader 105 and the liquid crystal display 103 can be directly mounted on the side thereof. In this case, since the optical reading of the barcode mark 205 and the display output of various states are executed near the position where the drug syringe 200 is loaded, these can be executed intuitively.
[0088]
Moreover, in the said form, in order to respond | correspond to the pressure which changes with the chemical | medical solution syringes 200, it illustrated that the pressure for every state was registered into the chemical | medical solution injection apparatus 100 for every identification data of the chemical | medical solution syringe 200. It is also possible to correct the pressure that is uniformly registered in the data with a coefficient or the like corresponding to the identification data of the chemical syringe 200.
[0089]
If the pressure for each state is registered for each identification data, the processing burden of data correction can be reduced and the detection accuracy of the state can be improved, and if the pressure for each state is corrected with the identification data, The capacity of stored data can be reduced and the processing load of data retrieval can be reduced.
[0090]
In the above embodiment, it is assumed that the chemical injection device 100 is used in the vicinity of the MRI apparatus 300 that is a fluoroscopic imaging apparatus. However, this may be applied to a CT scanner, a PET apparatus, an angio apparatus, an MRA apparatus, an ultrasonic diagnostic apparatus, etc. It can also be used in the vicinity of the fluoroscopic imaging device.
[0091]
Furthermore, in the above embodiment, the chemical syringe 200 is directly attached to the chemical injection device 100. For example, only the maximum size chemical syringe 200 is directly attached to the chemical injection device 100, and various sizes other than the maximum are available. The chemical solution syringe 200 may be attached to the chemical solution injection device 100 via a dedicated cylinder adapter (not shown).
[0092]
In particular, in the chemical injection device 100 that injects the chemical at a high pressure, a cylinder adapter that loads the entire cylinder member 201 is used in order to prevent the cylinder member 201 of the chemical syringe 200 from being destroyed. Such a cylinder adapter is formed in a cylindrical shape in which the cylinder member 201 is detachably loaded from the rear end, and an annular adapter flange is formed on the outer periphery of the rear end.
[0093]
Since a concave portion in which the cylinder flange 203 of the chemical syringe 200 is detachably engaged is formed on the rear surface inside the adapter flange, when the chemical syringe 200 equipped with such a cylinder adapter is attached to the chemical injector 100. The immovable holding member 123 and the pair of movable holding members 121 and 122 hold the cylinder flange 203 indirectly by directly holding the adapter flange.
[0094]
In the above embodiment, the rod-shaped piston member 202 is illustrated as being inserted into the cylinder member 201 of the chemical syringe 200. However, such a chemical syringe 200 includes a product in which the piston member is only the head portion (see FIG. Not shown). In particular, in the chemical syringe 200 that injects the chemical liquid at a high pressure as described above, the piston member is only the head portion as described above in order to prevent the rod portion from being broken, and such a chemical syringe 200 is used. In the chemical solution injector (not shown), the piston drive mechanism grips and slides the piston head of the chemical solution syringe 200 with a metal strong slide arm or the like.
[0095]
Furthermore, in the above-described embodiment, it is exemplified that an appropriate computer program and resources are pre-installed in the chemical injection device 100. For example, when sales of the new chemical syringe 200 are started, the computer program and resources are stored as data. It is preferable to update.
[0096]
In that case, it is also possible to download a new computer program or resource from the information storage medium such as a PC card to the chemical injection device 100, and the chemical injection device 100 is connected to the host computer of the device manufacturer or chemical solution manufacturer via a communication network such as the Internet. It is also possible to download computer programs and resources online.
[0097]
Moreover, in the said form, it was illustrated that various means are logically implement | achieved as various functions of the chemical | medical solution injection apparatus 100, when CPU131 operate | moves corresponding to the computer program stored in RAM133 grade | etc.,. However, each of these various means can be formed as unique hardware, and a part can be stored in the RAM 133 or the like as software, and a part can be formed as hardware.
[0098]
【The invention's effect】
In the chemical injection device of the present invention, since the data stored pressure or the change over time and the detected pressure or the change over time can be collated, the state of the piston drive mechanism and the chemical syringe can be detected. For example, it is possible to prevent air from being injected into the subject by detecting the state in which air is mixed in the chemical solution of the chemical syringe and forcibly stopping the piston drive mechanism.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing a logical structure of a chemical liquid injector according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which a chemical syringe is attached to and detached from an injection head of the chemical injection device.
FIG. 3 is a perspective view showing an appearance of a chemical liquid injector.
FIG. 4 is a perspective view showing an appearance of an MRI apparatus that is a fluoroscopic imaging apparatus.
FIG. 5 is a perspective view showing an external appearance of a chemical liquid syringe and a main part of a piston drive mechanism.
FIG. 6 is a block diagram showing a physical structure of the chemical liquid injector.
FIG. 7 is a flowchart showing the first half of the data processing method of the chemical injection device.
FIG. 8 is a flowchart showing a second half part.
FIG. 9 is a perspective view showing an appearance of an injection head of a chemical injection device according to a modified example.
[Explanation of symbols]
100 chemical injection device
103 Liquid crystal display as a display panel
105 Bar code reader
120 piston drive mechanism
122 Piston pressing member
123 engaging claw
124 Load cell as pressure detecting means
126 Drive motor
130 Computer unit
141 Pressure storage means
142 State detection means
143 Drive control means
144 Status display means
145 Warning output means
146 Motion interlocking means
200 Chemical syringe
201 Cylinder member
202 Piston member
204 Piston flange
205 Bar code mark
300 MRI apparatus which is a fluoroscopic imaging apparatus

Claims (11)

A chemical liquid injection device for injecting a chemical liquid into a subject by at least press-fitting the piston member into the cylinder member of a chemical liquid syringe in which a piston member is slidably inserted into a cylinder member,
A piston driving mechanism for pressing the piston member into the cylinder member to press the piston member by the piston pressing member,
Pressure detecting means for detecting the pressure with which the piston driving mechanism presses the piston member;
Pressure storage means for storing data to be detected by the pressure detection means for each state of the piston drive mechanism and the liquid syringe;
A state detecting means for performing data comparison between the pressure stored in the data and the detected pressure, and detecting the state of the piston drive mechanism and the liquid syringe;
Drive control means for controlling the operation of the piston drive mechanism in response to a state in which the state detection means detects data, and
The said pressure storage means, the first pressure state of the air is contaminated with (or aging) is stored in the chemical,
The state detecting means collates data between the pressure (or its change over time) detected by the pressure detection means and the first pressure (or its change over time), so that air is mixed into the chemical liquid. Whether or not , and
The piston drive mechanism is
It also has at least a pair of engaging claws that are attached to the piston pressing member so as to be freely opened and closed and engage with a piston flange of the piston member,
The pressure storage means includes
The pressure when the piston pressing member is not in contact with the piston member;
The pressure in a state where the engagement claw is pressed against the piston flange; and
The pressure in a state in which the engagement claw is engaged is stored,
The drive control means includes
(I) When the state where the piston pressing member is not in contact with the piston member is detected, the piston driving mechanism is operated,
(Ii) When the state in which the engagement claw is pressed against the piston flange is detected, the piston drive mechanism is further operated,
(Iii) A chemical injection device that temporarily stops the piston drive mechanism when the state in which the engagement claw is engaged with the piston flange is detected . The pressure storage means further stores a second pressure (or its change over time) lower than the first pressure in a state where air is injected into the subject,
The state detecting means collates data between the pressure (or its change over time) detected by the pressure detection means and the second pressure (or its change over time), so that air is injected into the subject. The chemical injection device according to claim 1, wherein it is determined whether or not the state is present . The drive control means includes
The chemical injection device according to claim 1, wherein when it is determined that air is mixed in the chemical, the piston drive mechanism is forcibly stopped . The drive control means includes
The chemical solution injection device according to claim 2, wherein the piston drive mechanism is forcibly stopped when it is determined that air is being injected into the subject . It also has a syringe input means for inputting identification data of a plurality of types of chemical syringes,
The pressure storage means stores the pressure (or its change over time) for each identification data of the chemical syringe,
The said state detection means carries out data collation with respect to the said pressure (or its temporal change) memorize | stored corresponding to the said input identification data, and the said detected pressure (or its temporal change). The chemical | medical solution injection device of any one of 1-4 . The chemical solution injection device according to claim 5, further comprising pressure correcting means for correcting the pressure detected corresponding to the input identification data . In the chemical syringe, identification data is recorded on at least one of the cylinder member, the piston member, and the packing material,
The chemical injection device according to claim 5 or 6, wherein the syringe input means detects the identification data from the chemical syringe . A display panel juxtaposed at the position of the piston drive mechanism;
State display means for displaying and outputting at least a state in which the state detection means detects data on the display panel;
It has also, The chemical | medical solution injection device of any one of Claims 1-7 . The chemical injection device according to any one of claims 1 to 8, further comprising warning output means for outputting a confirmation warning in response to a state in which the state detection means detects data . The pressure detection means comprises a load cell made of a non-magnetic material,
The chemical | medical solution injection device of any one of Claims 1-9 which has the ultrasonic motor in which the said piston drive mechanism is formed with the nonmagnetic material as a drive source . A fluoroscopic imaging device for imaging a fluoroscopic image of a subject;
The chemical injection device according to any one of claims 1 to 10,
Operation interlocking means for interlocking the imaging operation of the fluoroscopic imaging apparatus with the state in which the state detection means of the chemical injection device detects data;
A chemical injection system comprising:

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